Reinstall the carburetor back on the engine. 015 clearance is measured at wide-open throttle. Sep 19, 2012 Take carb off, flip carb over. You should have 1-916" throttle plates, HolleyQF sells sets of new throttle plates for around 15 so if you end up with too big holes you have an easy solution of restoring it to normal. Jan 27, 2021 Many Holley performance carburetors are equipped with what is called four-hole or four-port idle mixture control. Will work for 1850-1 thru 1850-6, if you do not need the vacuum ports. They add idle fuel that isn&39;t controlled by the mixture screws. They add idle fuel that isn&39;t controlled by the mixture screws. Talk to the experts. There is one transition slot in the side of each bore approximately where the lower edge of the throttle plate is. Secondary Throttle Adjusting Lever Kit. Those slim rectangular openings in the throttle bore are the idle transfer slots. Discussion Starter 1 Mar 21, 2003 I&x27;ve been searching old holley threads, but have not found the exact specs for setting the secondary throttle plate, other than "crack it open a bit" Do you set it like the primary side with. Secondary throttle blades should be just a fraction of a turn from fully closed to prevent the plates from binding in the bores. Dec 12, 2014 Start with throttle secondary plates closed on stop, and adjust until transition slot looks like a square hole. HOLLEY THROTTLE SHAFT. The transfer slots are supposed to be slots so that they are available to flow fuel over a slight range of throttle plate opening from the idle discharge openings upward. Turn adjustment screw until it just touches the throttle lever and turn 12 turn more to position the valves. CHECK BALL - Your kit may contain more than one check ball. Those slim rectangular openings in the throttle bore are the idle transfer slots. If the needle is defective, replace with a Holley matched set. The throttle blades do not open at the same time. Log In My Account mm. Mar 28, 2016 1,177 Posts. May 07, 2018 (secondary slot adjustment) The other thing I would verify is that all the gasket surfaces are square. 4 . Holley Power Steering Pump Pulley. Tighten the lock screw. Beforehand, adjust the idle speed screw on throttle body, to achieve an IAC Position of about 2 at hot idle. 33 - PUMP OVERRIDE ADJUSTMENT FIG. It seems many VS Holley have the transitions slots up higher in the tube than the primary, so squaring those could lead to extremely high idle. LArger secondary holes with primary holes will get it up between 1000 and 1200. Mar 21, 2003 Discussion Starter 1 Mar 21, 2003 I&39;ve been searching old holley threads, but have not found the exact specs for setting the secondary throttle plate, other than "crack it open a bit" Do you set it like the primary side with. See all 12 photos. Holley four barrels like this 750 cfm 0-3310C have a small set screw located beside the passenger side throttle bore shaft bore (on the base plate of the carburetor, so you&x27;ll have to flip it over). The video describes the various. 4 . They open to about 80 to 85 almost 90 but not quite, is there an adjustment I can. 36 - CHOKE ADJUSTMENT FIG. Sounds like gaskets leaking to me, a maching shop should be able to help you out. Then add 2 deg more advance. in Automotive Replacement Carburetor Jets. Also, remove the throttle blades and plain both sides of the throttle body. After letting the engine warm up and driving for a while, I pulled off the air cleaner and there was a small puddle of fuel on top of the secondary throttle plates. Part HOL-12834. Choke plate screws should be restaked after tightening to prevent loosening. Start the engine and adjust the idle speed by the secondary adjusting screw, until the previous RPMs are achieved. The way it works is by drawing fuel and air into the engine by way of a vacuum that is created while the engine is running. This procedure is only used on engines with large duration camshaft that have very low vacuum at idle. Holley four barrels like this 750 cfm 0-3310C have a small set screw located beside the passenger side throttle bore shaft bore (on the base plate of the carburetor, so youll have to flip it over). 7 out of 5 stars. This is an older thread, you may not receive a response, and could be reviving an old thread. There is an idle circuit in the rear barrels of your Holley, too. To correct this problem you can raise the secondary throttle plates a little with the secondary adjusting screw allowing more airflow into the engine. When you have established this RPM, set the idle speed to about 100 rpm higher. Feb 01, 2011 Back off adjustment screw until the throttle plates are fully closed (secondaries). Secondary throttle blades should be just a fraction of a turn from fully closed to prevent the plates from binding in the bores. 026 34r9716-3 3. CHECK BALL - Your kit may contain more than one check ball. As of now. Went up to. This will result in a secondary opening of approximately 40, and both the primary and secondary will be at. Dec 12, 2014 Start with throttle secondary plates closed on stop, and adjust until transition slot looks like a square hole. So I would close the secondary side enough to have about 0. Then add 2 deg more advance. Beyond that and your idling on the primary jets, LOL. Product Details. Idle Af is in the mid 14&39;s. Secondary transfer slot. Vac at idle is 14. 4 . 1967-1992 Camaro Holley Chrome Fuel Pump Big Block 12-835. Secondary Idle Levers allow easy adjustment of the secondary air flow on Double Pumper carburetors without removing the carburetor from the intake manifold. 99 Free shipping 29 sold Quick Fuel Holley Carburetor Adjustable Vacuum Kit Quick Secondary (63-12QFT) New 42. It allows user to pick between 11 or progressive secondary ratio. You should not have much showing below the throttle plate. Turning the screw counterclockwise (F) will open the secondaries quicker. Log In My Account mm. Turning the screw counterclockwise (F) will open the secondaries quicker. A big-cam engine needs a higher idle speed, which is usually about 1,000 rpm; a regular street cam needs about 600 rpm. Those slim rectangular openings in the throttle bore are the idle transfer slots. This carb has vacuum secondaries, so that may be why the secondary slot is so high. Be safe, schick. Tighten the screw and lock washer holding the cam lever to the throttle shaft. There is an idle speed screw that adjusts the opening of the throttle plate, and an idle mixture screw that limits the flow . If its just a cruiser or a show car, the Edelbrock is not a bad choice. The accelerator pump should be adjusted so that the slightest movement of the throttle lever results in actuation of the accelerator pump. Cover 157 Hot Idle Compensator Assembly 158 H. There is one transition slot in the side of each bore approximately where the lower edge of the throttle plate is. 1 - 9 of 9 Posts. Plugs are 276 Accel Shorty&39;s. You should not have much showing below the throttle plate. 40 offers from 36. Last edited Feb 2, 2011. This will assure you have the slot active at idle and should give good throttle response. np; go. Weiand 4032 Part Number 925-4032. 8 Apr 2, 2016. 3 08-23-2011, 0452 AM MilesAway1980 Registered User Join Date Nov 2009 Posts 63 I&39;ll pull it apart and check it over, but the throttle plate is brand new as of a week or two ago. It seems many VS Holley have the transitions slots up higher in the tube than the primary, so squaring those could lead to extremely high idle. How To Adjust The Accelerator Pump On Holley Carburetors Holley 134K subscribers 692K views 14 years ago Carburetor Installation & Tuning Segments How-to adjust the accelerator pump on. View Options. The carburetor is a wondrous but sometimes-mysterious device mounted on top of an engine that makes it run. I always remove the adjustment screw from the bottom and screw it in from the top. Also, remove the throttle blades and plain both sides of the throttle body. Vacuum secondary Holleys are easy to identify because of the large diaphragm housing positioned on the passenger side of the carburetor that connects to the secondary throttle shaft. olson high school; stucky jealous bucky; 99 ranch market. The secondary boosters are leaking fuel. This tunnel ram is set up with a pair of 0. 19 . As I remember, it is accessible from . 0 out of 5 stars Holley Carburetor Secondary Idle Adjuster. HOLLEY THROTTLE SHAFT. 020 transition slot exposure), hold the carb up. It seems many VS Holley have the transitions slots up higher in the tube than the primary, so squaring those could lead to extremely high idle. Jun 14, 2021 Holley 600650. Secondary Idle Levers allow easy adjustment of the secondary air flow on Double Pumper carburetors without removing the carburetor from the intake manifold. Since the injectors are flowing fuel as if they were open, fuel builds up behind the throttle plates which results in a sudden "surge" when that fuel is dumped into the manifold as the secondaries start to open. Start with a quarter turn on each one and readjust the idle speed to an appropriate RPM. 40 offers from 36. Quick fuel 1 1116 billet base plate makes it a 650cfm Could hardly run with either one and made no difference. furryfrog said The idle mixture screws only control fuel out of the office below the throttle plates, fuel will still come out the transfer slots. Float level setting is too high, or new needle and seats are not sealing tight at either the needle tip or the o-ring around the needle and seat cartridge. 0 out of 5 stars Holley Carburetor Secondary Idle Adjuster. A dial back timing light or degree tape on your balancer are required for this and a helper to keep the engine at rpms is recommended. You may need to drill some small holes in your throttle plates. Beforehand, adjust the idle speed screw on throttle body, to achieve an IAC Position of about 2 at hot idle. See all 12 photos. By turning the screw clockwise approximately 1-12 turns, the throttle blade on the secondary will open slightly. Mar 10, 2014 Yes, you should be able to adjust it. Tighten the screw and lock washer holding the cam lever to the throttle shaft. Call 800. Finally verify the float level is correct and stable. There is an idle circuit in the rear barrels of your Holley, too. They add idle fuel that isn&39;t controlled by the mixture screws. AF at 2000 (50 mph) and 2800 (60 mph) is in the high 14&39;s to 15. 35 - SECONDARY THROTTLE STOP ADJUSTMENT Model 2010, 2300, 4010, 4011, 4150, 4160, 4165, 4175 Model 2300, 4010, 4011, 4150, 4160 FIG. Oct 08, 2007 To avoid this, use the following secondary throttle adjustment on the Holley carbs After adjusting and setting up the primary throttle blade angle as described above (. So the recommendation is to look through the primaries to see the light gap and copy that gap with the secondaries. 029 34r9716-34 34. 1 - 8 of 8 Posts. Allows quick and easy adjustment Features Genuine Holley Quality Parts About Holley Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. guess that is not the plan. By turning the screw clockwise approximately 1-12 turns, the throttle blade on the secondary will open slightly. Sep 19, 2012 Take carb off, flip carb over. Then open the idle screws to the stock setting. This procedure is only used on engines with large duration camshaft that . Idle Af is in the mid 14&39;s. Feb 01, 2011 3) be sure you have correct initial timing normally around 10 or 12 for stock motors and anywhere up near 18 -22 for more angry motors. Now file the throttle plate screws on the secondary side. Tuning Holley Vacuum Secondaries. Reinstall the carburetor back on the engine. Then you dont have to pull the carb to make an adjustment. 4) set your idle mixtures which i normally do with a vacum gauge adjusting no more than 14 a turn on all corners at a time. Jul 30, 2006 Heres the data 70 Chevelle. 3 08-23-2011, 0452 AM MilesAway1980 Registered User Join Date Nov 2009 Posts 63 I&39;ll pull it apart and check it over, but the throttle plate is brand new as of a week or two ago. Then you dont have to pull the carb to make an adjustment. 3 08-23-2011, 0452 AM MilesAway1980 Registered User Join Date Nov 2009 Posts 63 I&39;ll pull it apart and check it over, but the throttle plate is brand new as of a week or two ago. Workplace Enterprise Fintech China Policy Newsletters Braintrust gh Events Careers bl Enterprise Fintech China Policy Newsletters Braintrust gh Events Careers bl. Last edited Feb 2, 2011. I don&39;t think I can adjust the air bleeds on this one. It would go a little lean between 25 and 30 throttle on a 4 corner idle with a smaller IR. The following is just for general information, you can get extra idle air by adjusting the secondary throttle blades as mentioned by 427stang, the other way is to drill a. This will assure you have the slot active at idle and should give good throttle response. guess that is not the plan. 1967-1992 Chevy Camaro Chrome Holley Carburetor Throttle Return Kit. The video describes the various. 4) set your idle mixtures which i normally do with a vacum gauge adjusting no more than 14 a turn on all corners at a time. Like mstrcrftr said, they need to be partially uncovered by the throttle blades. You may need to drill some small holes in your throttle plates. Tighten the screw and lock washer holding the cam lever to the throttle shaft. Log In My Account xf. Tighten the lock screw while holding the adjustment nut. In the Idle ICF, the "Target Idle Speed. Holley offers a tuning kit with seven color-coded springs so that the user can adjust the secondary opening rate to suit the needs of the engine and vehicle. 7 out of 5 stars. 1 - 9 of 9 Posts. See pic of secondary shaft not. Upgrade your carb with PROFORM&39;s new Billet Throttle Base Plate. in Automotive Replacement Carburetor Jets. 12R-1856B is cast into the throttle plate. Remount carburetor and re adjust idle screws and primary throttle stop. (4) Check float for being loaded with fuel, bent float hanger or binding of the float arm. Black is the stiffest, followed in order by brown, plain, purple, yellow, orange and white, which is the lightest. Carburetor Repair Kit. The check ball removed from. Feb 01, 2011 3) be sure you have correct initial timing normally around 10 or 12 for stock motors and anywhere up near 18 -22 for more angry motors. 25 out in the front and 2 out in the back. Mar 10, 2014 Yes, you should be able to adjust it. -Get an ME Wagner PCV valve. If any binding occurs on the base plate, adjust the cam lever by gently prying. So I went with Holley&39;s tech tips and adjusted the set screw for the secondaries. carburetor tuning and adjustments. 125 lbs Related products. Log In My Account xf. 8 Apr 2, 2016. This procedure is only usedon engines with large duration camshaft that have very low vacuum at idle. Will work for 1850-1 thru 1850-6, if you do not need the vacuum ports. 1,500 Posts. Now turn them out 1. For Holley 4160 Carburetors only. Part GCS-S2083. Disassemble and clean. (5) Adjust float to specifications. The secondary throttle plate opening adjustment is a little screw that looks like a grub screw. For Holley 4160 Carburetors only. yes, that is your idle speed air intake setting. Theres an easy fix adjust the secondary throttle stop screw. (3) Check float needle and seat for proper seal. 1997 chevy suburban 1500. It seems many VS Holley have the transitions slots up higher in the tube than the primary, so squaring those could lead to extremely high idle. Mar 28, 2016 1,177 Posts. See all 12 photos. How to properly adjust the secondary speed screw on Holley carbs. There&x27;s an easy fix adjust the secondary throttle stop screw. Here are the steps for calibrating the idle mixture Progressively turn the idle-mixture screws in. So the recommendation is to look through the primaries to see the light gap and copy that gap with the secondaries. Like mstrcrftr said, they need to be partially uncovered by the throttle blades. Mar 10, 2014 Yes, you should be able to adjust it. Call 800. Will work for 1850-1 thru 1850-6, if you do not need the vacuum ports. 34 -VENT VALVE ADJUSTMENT FIG. Choose pivot point to allow full return to idle position,but still allow throttle to open fully till stoped by the carb wot position stop. This is an ideal situation. A typical starting location for these idle mixture screws is between 1 and 1 turns out from fully seated. "> 12v push button switch autozone. Vac at idle is 14. (4) Check float for being loaded with fuel, bent float hanger or binding of the float arm. Square up the primaries. This is an older thread, you may not receive a response, and could be reviving an old thread. Tighten the lock screw. 37 - DASHPOT ADJUSTMENT Holley Performance Products 1801 Russellville Road Bowling Green, KY 42101 1-270-781-9741. Holley four barrels have a small setscrew located beside the passenger side throttle bore shaft bore (on the base plate of the carburetor, so youll have to flip it over). This shouldn&x27;t really open the throttle blades any but will insure they don&x27;t stick in the throttle bore when they go to open. Be safe, schick. 125 lbs Related products. It would go a little lean between 25 and 30 throttle on a 4 corner idle with a smaller IR. They add idle fuel that isn&39;t controlled by the mixture screws. The check ball removed from. Part HOL-12834. Also, remove the throttle blades and plain both sides of the throttle body. Apr 04, 2015 Adjusting Throttle Blades. When all eight screws have been filed down flush with the shaft, remove the throttle body from the vise, remove the wood wedges from the bores, and remove the throttle plate screws. Talk to the experts. Vac at idle is 14. 5 . You may need to drill some small holes in your throttle plates. If there is a fly in the Holley ointment, it&x27;s setting up the idle. Holley20-16 - ThrottleLeverExtension (6) 15. Secondary blades will apear straight90 when at wot. Dec 12, 2014 Start with throttle secondary plates closed on stop, and adjust until transition slot looks like a square hole. After this adjustment, I was able to set the idle mixture to a much more tame 1. Holley Mechanical Fuel Pressure Gauge. They add idle fuel that isn&39;t controlled by the mixture screws. (5) Adjust float to specifications. Check the throttle travel before starting the engine. Adapter height is 2-14 inches. Remove the sight plug to reinspect the fuel level. Start with throttle secondary plates closed on stop, and adjust until transition slot looks like a square hole. Secondary Idle Levers allow easy adjustment of the secondary air flow on Double Pumper carburetors without removing the carburetor from the intake manifold. If the engine vacuum andor engine speed increases, then adjust the passenger side idle mixture screw the same amount and monitor the vacuum reading. There is an idle circuit in the rear barrels of your Holley, too. Las vegas. need tips & pics if possible on. Log In My Account sq. Holley offers some tips on how to properly operate and adjust four-barrel carburetors with vacuum secondary throttle blades. 020" of slot exposed on the primary side. Jun 08, 2017 Theres also a new secondary pump cam lever to provide for a positive throttle stop on the secondary side. 4 barrel Holley has a set screw on the passenger side to adjust the secondary throttle plates. So, I backed the secondary off until it was closed and adjusted the front to get the desired values. in Automotive Replacement Carburetor Rebuild Kits. 71 air-fuel mixture ratio for maximum fuel economy and emissions control. They add idle fuel that isn&39;t controlled by the mixture screws. The plain or silver spring is most common in production carbs. To improve fine tuning abilities I installed an aftermarket bracket on the secondary throttle shaft of my 850 CFM Holley dual-feed double-pumper with mechani. If the needle is defective, replace with a Holley matched set. how long to use vaseline after mohs surgery, plaet fitness near me
226. . Holley secondary throttle plate adjustment
In Stock. I ve never had to tune a carb with 6 inches of vacume personally. This is a good starting point for further adjustment. This procedure is only usedon engines with large duration camshaft that have very low vacuum at idle. 585 cfm delivers the needed fuel to give the exact response to your ride. Beyond that and your idling on the primary jets, LOL. If open to far this can cause what you . How to properly adjust the secondary speed screw on Holley carbs. Reinstall the carburetor back on the engine. You should have 1-916" throttle plates, HolleyQF sells sets of new throttle plates for around 15 so if you end up with too big holes you have an easy solution of restoring it to normal. The check ball removed from. (3) Check float needle and seat for proper seal. The video describes the various. Both the primary and secondary metering blocks on the Holley Ultra XP 4150 carburetors are machined from 6061 aluminum. This is an older thread, you may not receive a response, and could be reviving an old thread. This tunnel ram is set up with a pair of 0. 00 for the add-on adjuster. This is an older thread, you may not receive a response, and could be reviving an old thread. This tunnel ram is set up with a pair of 0. Then you can tweak it by just opening the throttle to WOT to expose the screw slotAllen socket. A typical starting location for these idle mixture screws is between 1 and 1 turns out from fully seated. Workplace Enterprise Fintech China Policy Newsletters Braintrust gh Events Careers bl Enterprise Fintech China Policy Newsletters Braintrust gh Events Careers bl. Perhaps a mech secondary carb with 4 corner. You will have to go through this adjustment sequence several times before getting it right. Throttle response is good and the idle is steady. yes, that is your idle speed air intake setting. &0183;&32;Completed at the Zuffenhausen-based Porsche works, the new Porsche was equipped with the same engine as fitted in the car today, while the exterior was finished in Silver Jan 24, 2022 &183; Holley Sniper 550-849 - Holley Sniper EFI 2300 Two-Barrel Fuel Injection Systems. The carb on the left is a Quick Fuel 650 cfm with vacuum secondaries, while the monster on the right is a 1050 cfm Holley Dominator. Install the new secondary idle adjustment lever over the throttle shaft. Many Holley performance carburetors are equipped with what is called four-hole or four-port idle mixture control. 020 transition slot exposure), hold the carb up to a light and look up the bottom of the carb (with the choke blade wide open) note the amount of light. com FREE DELIVERY possible on eligible purchases. 35 - SECONDARY THROTTLE STOP ADJUSTMENT Model 2010, 2300, 4010, 4011, 4150, 4160, 4165, 4175 Model 2300, 4010, 4011, 4150, 4160 FIG. Reinstall the carburetor back on the engine. This will result in a secondary opening of approximately 40, and both the primary and secondary will be at. (5) Adjust float to specifications. 5. Do you have a 4160 Yes it&39;s a 4160. Does not have any vacuum ports. In some rare cases it may be helpful to grind a bit of the primary. 843-3673 email protected item 1 Holley 600 CFM 4-Barrel Street Carburettor Alloy Body Vacuum Secondary 1. 3 08-23-2011, 0452 AM MilesAway1980 Registered User Join Date Nov 2009 Posts 63 I&39;ll pull it apart and check it over, but the throttle plate is brand new as of a week or two ago. kn; ex. The video describes the various. Sounds like gaskets leaking to me, a maching shop should be able to help you out. Start with a quarter turn on each one and readjust the idle speed to an appropriate RPM. LArger secondary holes with primary holes will get it up between 1000 and 1200. Will work for 1850-1 thru 1850-6, if you do not need the vacuum ports. Log In My Account xf. Tighten the screw and lock washer holding the cam lever to the throttle shaft. You may need to drill some small holes in your throttle plates. Dec 12, 2014 Start with throttle secondary plates closed on stop, and adjust until transition slot looks like a square hole. LS-5 with 9. For Holley 4160 Carburetors only. There is one transition slot in the side of each bore approximately where the lower edge of the throttle plate is. I found the secondary blades were open so far, I couldn&39;t get the primary closed enough to lower the idle, and get the IAC value down to 2. Tighten the lock screw while holding the adjustment nut. See all 12 photos. Quick and easy adjustment for the secondary. Tighten the lock screw. Carburetor Secondary Linkage; For Use With All Holley Double PumpersHPUltra HP Carburetors; 11 Ratio Linkage and Progressive Linkage. You can close the secondary throttle plates by adjusting the . Thumperdart Well-Known. Holley Video carburetor tuning and adjustments video How to properly adjust the secondary speed screw on Holley carbs. Idle Af is in the mid 14&39;s. Fights using the idle mixture screws too. 98 - 84. 0 out of 5 stars Holley Carburetor Secondary Idle Adjuster. Feb 03, 2019 16. Call 800. Inspect the throttle shaft where the filing was done and check for any burrs. -Get an ME Wagner PCV valve. Start the engine, give her whatever timing she wants, as determined by the highest idle speed obtained, and then set the secondary opening to . Jul 20, 2008 2)Too rich and Too lean smell exactly the same. There is an idle speed screw that adjusts the opening of the throttle plate, and an idle mixture screw that limits the flow . Part 108-200. Then open the idle screws to the stock setting. Finally, turn the secondary throttle plate adjustment screw until a reasonable idle is achieved. Also, remove the throttle blades and plain both sides of the throttle body. in Automotive Replacement Carburetor Jets. 67 subscribers To improve fine tuning abilities I installed an aftermarket bracket on the secondary throttle shaft of my 850 CFM Holley dual-feed double-pumper with mechanical secondaries. Might make sure the throttle plates arent hanging on the gaskets. np; go. The way it works is by drawing fuel and air into the engine by way of a vacuum that is created while the engine is running. hy xd bx ca rw li mz se la nw tq on cf lk 40 offers from 36. LS-5 with 9. Verified Purchase. Holley secondary throttle plate adjustment By sk gq If the engine vacuum andor engine speed increases, then adjust the passenger side idle mixture screw the same amount and monitor the vacuum reading. Also, remove the throttle blades and plain both sides of the throttle body. You may need to drill some small holes in your throttle plates. Start with a quarter turn on each one and readjust the idle speed to an appropriate RPM. Turning the screw counterclockwise (F) will open the secondaries quicker. Workplace Enterprise Fintech China Policy Newsletters Braintrust gh Events Careers bl Enterprise Fintech China Policy Newsletters Braintrust gh Events Careers bl. 40 offers from 36. So the recommendation is to look through the primaries to see the light gap and copy that gap with the secondaries. Holley 4150 Double Pumper Carburetor Throttle Base Plate 4 Corner Idle 650 750 New 120. 8 Apr 2, 2016. Quick question, I recently purchased a 4150 with mechanical secondaries(pn 4777-4) , and I am about to install it but I noticed the secondary throttle plates don&x27;t open all the way when the primaries are at WOT. Does not have any vacuum ports. Holley secondary throttle plate adjustment. Secondary Idle Levers allow easy adjustment of the secondary air flow on Double Pumper carburetors without removing the carburetor from the intake manifold. Last edited Feb 2, 2011. author Bill Tichenor 358 Posts An Article About Carburetor Installation and Tuning Holley Video. Turn the screw clockwise (S) will slow the opening rate. For Holley 4160 Carburetors only. The stumble I had went away, and the carb runs much better now. Holley Mechanical Fuel Pressure Gauge. 020" of slot exposed on the primary side. Also, remove the throttle blades and plain both sides of the throttle body. This is an ideal situation. On a Vac Secondary 2 corner idle Holley, if you need more air at idle whitout uncovering transition slot you can drill throttle plates or open secondarys a bit. Secondary Idle Levers allow easy adjustment of the secondary air flow on Double Pumper carburetors without removing the carburetor from the intake manifold. The secondary throttle plate opening adjustment is a little screw that looks like a grub screw. HOLLEY THROTTLE SHAFT. 30 2013. 3 . Part 108-200. Shop Holley 1957 Chevy Trailblazer Ford Flathead V8 Throttle Linkage and get Free Shipping on orders over 149 at Speedway Motors. It seems many VS Holley have the transitions slots up higher in the tube than the primary, so squaring those could lead to extremely high idle. 2 May 17, 2008. Sounds like gaskets leaking to me, a maching shop should be able to help you out. For Holley 4160 Carburetors only. 8 &183; Apr 2, 2016. take the Carb off and set the Secondary Throttle Plate Stop as per Holley Specs from . Oct 08, 2007 To avoid this, use the following secondary throttle adjustment on the Holley carbs After adjusting and setting up the primary throttle blade angle as described above (. Like mstrcrftr said, they need to be partially uncovered by the throttle blades. A typical starting location for these idle mixture screws is between 1 and 1 turns out from fully seated. You need to choose a mounting point closer to center of throttle shaft to increase amount of throttl travel. Here are the steps for calibrating the idle mixture Progressively turn the idle-mixture screws in. Carburetor Secondary Linkage; For Use With All Holley Double PumpersHPUltra HP Carburetors; 11 Ratio Linkage and Progressive Linkage. Typical application is 600 cfm primary side. Here&x27;s a video that shows the primary blades open about 15 before the secondaries start to open httpsyoutu. Choke plate screws should be restaked after tightening to prevent loosening. . best rule 34 sites