DragBoss Garage/Advanced Product Design: Carburetor Tuning Series: Adjusting Primary/ Secondary Idle
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- Опубліковано 6 лип 2024
- This video is a tutorial on how to set the APD Carbs Primary and secondary idle. This video features John Kyle, and Myself. John is the owner of Advanced Product design(APD). We are working together on a series of carb tuning videos. This applies to his APD series of carburetors. The principle of the adjustment is the same. Make sure engine is warmed up, make sure throttle cable unhooked, make sure throttle cable is adjusted correctly, all throttle blade open with throttle pedal to the boards.
The procedure is quite simple, just important to do it the same order.
Warm up car, unhook throttle linkage
1. Back off the Primary throttle blade adjustment screw, until you have an air gap between the adjusting screw, and throttle bracket.
2. Back off Secondary throttle blade adjustment screw, until you have an air gap between the adjusting screw, and secondary throttle blade bracket.
3. Then loosen lock nut, and back off Anti-stick threaded rod
4. Tighten Primary throttle blade adjustment screw, until it just touches the Primary throttle blade bracket.
5. Tighten Secondary throttle blade adjustment screw, until it just touches the Secondary throttle blade bracket
6. Then tighten Primary throttle blade adjustment screw in 2 1/2 turns in (Clockwise), then repeat the procedure to the Secondary throttle blade adjustment screw, 2 1/2 turns in.
7. Then tighten the Anti-Stick rod in, until it just touches the bracket, then back off 1/2 out, (counterclockwise), and tighten lock nut - Авто та транспорт
The close-ups are a big improvement. Thanks!
For sure, our first was test and off the cuff. Thanks, more on the way.
That's some awesome things that they do. Hopefully your videos will help there phone lines from getting tied up with simple technical questions.
Hoping so too don. Not everything is applicable to Holley carbs. Will have in depth discussions on difficult topics too
Back to basics! This was not redundant! This was a huge help! Great series I’ll be watching all of them.
Short and sweet. The first was poor quality, but lots to hear, so left it up. Not sure what is next, accelerator pump, A/F , idle mixture. I need to text him. Been so busy with my own car. Thanks
People need to realize this is specific to APD carburetors.
Thanks for sharing Tim.
Thanks for watching! George, yes, in video, and description. Try and make this point too
As always, great vid, Tim. Even though some of the advise given here might be applicable to APD carbs exclusively, the points made in the video can apply to any carburetor. One can end up with a carburetor that seems totally jacked up because too many changes/adjustments were made without understanding cause and effect. I've been guilty of it, myself. Holley claims that most carburetors returned as "defective" were, in fact, quite serviceable once adjusted back factory specs. These carbs are typically resold as "refurbished". I've purchased two refurbished QFT's that functioned flawlessly right out of the box. BTW, these APD carbs appear to be a work of art!!
Thanks Rotorr, I tried to make statements and put in description to clarify, between the two. John has said the same thing, he has seen defective carbs, and it is simply adjustment. When all else fails, go back to factory settings. They are a work of art, no doubt. Someone rec I make videos on Holley carbs, not sure on that yet.
Great info as always! I will be following this series closely. This is one area I have not been able to concur.
Carbs have always had some difficulty and issues for many. But they are not that technical. At least basic tune, it’s when you get into bleeds and passages where it gets cloudy. More on the way
@@DragBoss351Cleveland I hope you into those areas too or at least explain them. Love your videos!
@@mikeleschber33 Sure will, give us time, do the best we can for you.
Seeing and learning more at DBG! I will apply this to my carb immediately! Thank you Tim!!!
DBG for the win!
@@mavman351 Just make sure to check what type of float you have. Thanks Mav
You wouldn't believe how many people doesn't know that good vid drag boss can't wait for the rest the cougar sounds so good Tim that car is right you've done a excellent job need the dog in the next one you do at the house if you could that would be great
Yes the basics are key. Thanks she is running well. Zeus says hi
Love this series! Thank you for providing this Tim.
Your welcome, trying to keep it short and sweet, stay tuned for the discussion videos, much more lengthy.
@@DragBoss351Cleveland cheers to that Tim. Would love a mini series on an old school Holley dp carb by yourself and the gentleman with you unless this series covers the bases on that. Keep on slaying Chevys and let’s see that Cougar cut an 8.99 !
@goldysgarage189 yes some of the info correlates to Holley some does not. I guess I could do it, but want to finish what we are working on together. I will try and incorporate both. Thanks
Great presentation. Very good audio. Easy to view and follow along. Yes, technically applicable to APD carbs but there's info that can translate to 1450 and 4500 series carbs of "that other manufacturer" and others of similar design.
Thank you, John and APD for your guidance in this series.
Always seeing and learning something new when DragBoss is in the house!
Thanks brother Bill, this video is so much better, succinct. You are right, always seeing and learning something new, I will have to put that on the T shirts. Knowledge is power, stay tuned to DBG. More to come...
@@DragBoss351Cleveland T-shirts. Yeah!!!
Very interesting on the adjustment of the accelerator pump. I’ve always adjusted them at wot and making sure the diaphragm isn’t bottoming out on the float bowls with 0 gap between the pump arm and cam. That way with the slightest movement of the throttle the engine receives fuel. But I dealing with a standard Holley nothing trick like that bad boy!!😁
That is the way I have done holleys for years. These carbs are works of art Rick
i tried to run a BOSS 302 engine with an automatic trans in a pinto i built back in 76 or so .. never got it not to stumble .. wish i could have had some help like this back then ..
I have had my share of that, took two books to figure it out, back then no internet, and books limited. You welcome
I have a 3 circuit carb 1250 cfm each(2x) and I see the carb you have is a 3 circuit and not many people use them but I hope you will touch base on the intermediate circuit adjustment. I have the smallest air bleed.024" and now drilling the jet and discharge jet so far I am at 14.9 afraid so just a little to go.
John, and I have been talking about some of the videos, some are going to be discussion based, like A/F ratio, Air bleeds, and circuits. Currently finishing up a BBC, that we will put on dyno, and test on live engine. Not many have done this, unless you know of others?
my apd procharger blow through been running great but it really milks the oil.launches clean no stumble.i replaced the bowls and floats right from apd but still milking.i just adjusted the throttles as shown above i am 200 jet.....035 intermediate....026 idle....026 main on air bleeds and 3 turns out on the mixture screws.plugs are pretty fat and that oil is really milky.not hurting anything the bearings look good but let me know what you can suggest?
Man that is way above my tuning abilities. Are you running alcohol? I will send to APD and have them get in touch. Email me at thpa351@gmail. Com
@@DragBoss351Cleveland thanks so much for the help.Apd got back to me and figured out my issue.thank you!!!
@michaelkalin6198 there it is. Don’t forget to sub and share with your Motorhead buds