Hands down, THE BEST, easiest to understand, simple , to the point, well explained instructional video on RUclips! I watched 10 or 15 other videos before I watched this one. I wish I watched this one to begin with. After watching your video I went out and adjusted my carb afterwards with ease, and my C2 327 vette purs like a tiger! Thank You!
@@ProblemSolverGarage Have you ever pulled the adjusting rod out for the wiper door? I have a 68 and had to take the adjuster off to move vaccum canister . When I went to put in back on I found out it wouldnt tread back in because of it being stripped.
I’m a professional Precision machinist and have taught many apprentices on the job. And I have to say, This is the best C 3 tutorial series on the internet. Clear, precise, great camera angles and excellent teaching skills. No B.S clown shows going on on this channel.. just great serious educational level content that is presented and articulated in such a way that we instantly become smarter and the lesson is well learned! Time well spent watching this channel for anyone mechanical minded. I think trade schools should make this channel required content for the classroom. I hope this particular channel grows much bigger and gains great success, it certainly deserves a very large audience. Thank you for this particular video, now out to the garage to tune my old holly on the 69 corvette I’m putting back on the road after 9 Years. Great series!
This is a fantastic video especially for someone just learning . A really great job. You can also tune by connecting a vacuum gauge to the intake manifold and then adjusting for the highest vacuum. Eventually you learn to tune by ear
When I was young and living in SoCal, I had a long haired hippie biker dude that was my Holley expert who set up my carb on my jet boat. Now I'm old, far from SoCal and without my hippie carb dude, but still have the same jet boat! Have to set my carb up myself now, thanks for putting together this video. Very clear, easy to follow and understand. I especially like that you don't come off as an "expert", just a guy who knows what he's doing from real experience. Thanks again for the video!
I really can't thank you enough. My father's project car was a 78 vette. He passed away before it was finished. I am by no means any sort of car mechanic, but you have literally held my hand through literally learning how to finish this car. can't wait to have it running, what a beautiful machine these C3s are ❤❤❤
Great video on how to "dial in" a carb. I never really understood what was meant by dialing in a carb until I watched this video. My 71 Vette runs well and does not blow black smoke, so I guess the carb is set up correctly, but I may verify the settings. Thx for the awesome video.
Hello, buddy! Thank you very much for this video. I have got almost the same carburetor. But there is no one who is possible to tune it. Now you explaned to me the main principies of Holley carb tuning.
My Vette has a Holley. I thought they came with QuadraJets but mine is a Holley like yours. I initially found the idle screw and one gas mixture screw. I had no idea about the other stuff you showed me. Awesome !! Now I can hopefully make my car run correctly. Thanks Man
Thanks for the lesson. Best one I have seen. Also thanks for the behind the steering wheel view. 50 years ago I bought a 68 then a 66 with the two tops and then a 69. God, how I miss the view of those fenders rising up at eye level!
Great video well done. Also I love the old-school slotted mag wheels. Please don’t change them. Do not go back to the old rally wheels everybody has those.
Hey there! just came rolling in from The Netherlands (Holland)! Thanks a lot! i am rebuilding a 76' Thunderbird and going in it with 'some' knowledge from school (ages ago...) Thanks for the video! i really needed this :)
I have an Holley 1850 600 carb in My 65 Chevy C-10 pickup. I have a new fuel tank and just put the mechanical fuel pump in her. Tomorrow after work I will attempt to set up the carb as You described it. Thanks for this video. oh and that's a real nice ride you have
I have a 1977 Oldsmobile Cutlass Supreme 32500 original miles with a 750 CFM CLASSIC HOLLEY CARBURETOR thats driving me crazy. Slow exceleration & shakes at stop lights. I'm going to give this a shot although the shop says the dialed it in the bedt they could. Thank you!
Before slapping the bad boy on, make sure you check to make sure the transfers slots are set correctly, because if they are not, none of this is going to work. Also, a 15 dollar vacuum gage would be a worthwhile investment to make sure you are getting it really dialed in.... and a wide band o2 sensor would really help as well.
Great video it reaffirms how I always adjusted mine but I would like to suggest you get rid of the fire maker in you fuel line if that’s a filter that separates they are notorious for coming loose and starting g fires
Excellent description of the Holley carb. Got one on 77 ford 700 truck driving me crazy. Your video has help me a lot. Thank you for sharing your knowledge
So hey. This is a fantastic video. The guy has a great personality and speaks in layman's terms. I learned a lot about my Holley carb from this and so as a professional video director and editor I want to encourage you to make your storytelling even better. Your host says, "Ok" or "Guys" or "Ok guys" about 40 times in a 24 minute span. Beyond working to try not to use those meaningless words at the start of every clip or at the beginning of every thought, start by trading them with the words, "now" or "next". and see if that helps. also, if you record what we call "ambient sound" for 2 seconds at the beginning of each clip with no dialog and only background noise recorded, you can edit out those slips of "ok guys" with relative ease by replacing them with a chunk of natural background noise. Keep up the good work. I'll be watching more of your videos.
Great video! I recently set a single barrel using a vacuum gauge but wondered how to set the 4 bbl on my 66 mustang. Once I put it back together I feel confident I can dial it in. Thanks.
Awesome video! Thanks! One concern, have a fire extinguisher ready, not a water hose. Water will just push a fuel fire around, possibly making it worse. Sorry, thats the Fireman in me. Sweet ride!
And you wouldn't want to run water down the carburetor of a running engine unless trying to convince your wife that without doubt your Corvette needed a new engine.
Thanks so much for sharing this video. You are a very good teacher. You took a very technical and complicated process and made it clear and understandable. That is what the very best instructors do. Thanks!
Your videos are awesome. I have a 1972 with A/C and can't wait for you to start the A/C restoration. I have cold refrigerant all the way up to the valve that leads to the box but I'm not getting any cold air inside the cabin is moderate. Only around 70 degrees, although the line coming out of the valve is 40
I have owned my 1967 Sunbeam Tiger since 1978. I restored it over a 20 year period. Recently I rebuilt the Holley 1850 carb... and your video was exactly what I needed to tune it. Thank you!
Thank you for the video! I have a problem with my idle, when I'm parked(gear in "parked") and let to idle it's about 900-1000ish after warmed up. When I'm driving around and have to stop at a light or stop sign my (in "drive" gear) rpms drop to about 400-600 and stalls out sometimes. My question is how do I fix this,it's really annoying and frustrating.
Great Video! I have a question, on minute 2:57 when you are adjusting the second idle screw, what is that black hose on top of it and where does it go? My 1850 holley just has a hole there and I feel vacuum when engine is ON. Thank you in advance!
If you haven't found out already, that is a vacuum source to use ported vacuum for the distributor's vacuum advance. Your vehicle must either be using an intake manifold source for the vacuum advance, or not using vacuum advance at all. If not using the carburetor's ported source that you asked about, it needs to be plugged.
Thank you for the vid brother. Maybe I can get my 1850 on the Ole 1965 ford pick up to quit pouring gas every where. It has the 249 inline six with an offinhouser intake an the same type of distributor you have so wish me luck.
Have you ever pulled the adjusting rod out for the wiper door? I have a 68 and had to take the adjuster off to move vaccum canister . When I went to put in back on I found out it wouldnt tread back in because of it being stripped.
This was awesome! Thank you. Quick question… my 1987 MC SS on a cold start idles very high for a long period of time and doesn’t adjust until I give it gas. Do I have to adjust choke?
I have a 2 site glass one my double barrel and it doesn't matter which way I adjust the one closest to the radiator, it continuously fills up. I adjusted all the way up and all the way down and it keeps filling up. Any idea what I need to do to fix this? Any help would be appreciated.
There are clear plastic plugs available that allow you to set the float level while the engine is running. Once adjusted you mearly reinsert the metal screws. Much more accurate...
First i idle the car up a bit to around 1000 rpm. I always start idle circuit tuning with it fat. Something like 2½ to 3 turn out. Next adjust it half a turn at a time pulling fuel till it runs the smoothest & the fastest. Now i lower the idle to as low as you can with in reason, 500-600 or so depending on camshaft. Add a ¼ turn to one side once again checking for smoothest & fastist idling speed, do this on all 2/4 corners over and over ensuring you have it good as possible. I don't trust counting turns until i have set them by ear. Not all metering orifices & surfaces are identical so gauging them by how they all respond to the same input allows me to determine if one responds differently than the others, all should respond similarly. If one is different then it could be a sealing surface or debris in the flow path or it could just feel different due to resistance caused by corrosion in the threads. U have to judge all this from experience & common sense. Once everything's satisfactory then raise idle to desired rpm. Next start with a half turn out on all corners. Check throttle response, See how it responds to snappy throttle whacks. Try slow and fast revs, bring it up in rpm then whack it. Go 0% tps to 100% as fast as possible. If it stumbles adjust the accelerator pumps as needed. Check how it returns to idle, does it catch itself or does it drop then jump then catch its self. Put the car in gear & observe how it responds, wack the throttle and see if it Boggs. If the accel pumps don't quite supply enough fuel or u don't have parts to change or adjust then you can add fuel to the idle circuit, it will be a little rich but will have better response and off throttle torque. You just have to picture what's happening from the carb to the combustion chamber. The engine has to respond to stimulus and some times that taks time so it gets a big gulp of air without the right amount of fuel and it stumbles, so how bout we have a little extra fuel already in the cylinders so that when that big intial Serge of air gets there the fuel is already there & in fact its already started burning so the engine responds immediately to the air & but the time the fuel from the accelerator pumps get there with the fuel picked up in the Ventures from the boosters there is no hesitation bogg, it just responds. Maybe it gets a big swigg of fuel and the air isnt there yet. Just picture what its doing & why, picture what it needs and when, some things are give & take. Its simple... Air, Spark, Fuel. I probably sound half we todd it but its just that simple. You can get anything you want from a carb, any AFR at any RPM & even get different ones at all different RPM'S & engine loads. If you have a good carb with air bleeds it's just this simple to understand..... The carb is a straw & the engine is the person drinking. The signal or fast moving air getting sucked through the carb is someone sucking through a straw. If the straw is good you get pure liquid right? Well if the straw is cracked or has a hole its harder to get the liquid. This is basically a carbs design, you get a certain amount of liquid & a certain amount of air. The larger the hole the more air you get. Depending on where the hole is & how big it is determines how much of each you get, say for every 1 drop of soda you get you get 14 times more air. Now suck a little harder & cover one of those holes or air bleeds in the straw. Now you get more liquid, say 10 parts air & 1 part liquid. If that's too much then open the second hole back up & just block it by half. Now you get 12 or so parts air and 1 part liquid or fuel. Thats right on the money for makin power. Carbs are simple. Power valves, air bleeds, booster size or design etc. are all simple things that work together to deliver fuel. How come we don't teach these little physics demonstrations and experiments in schools? Kids need to see something to understand it, why not a Holley carb on top of a rowdy SBC they got to build then tune & rev the snot out of???? Now days people are just headed to the ((Hall of Fame of We Todd It civilizations)) lol.
Cool 'Vette. I don't mean to be a party pooper, but your accelerator pump should be adjusted to take out ALL clearance. Holley's recommended .015" clearance is referring to an additional pump arm movement when the throttle is wide open to keep from overstressing the diaphram. Also, the float level adjustment should be done with the engine running and adjusted to just lightly trickle from the sight hole. Your adjustment seems to be a tad low and between those two things I would expect you to have a slight hesitation.
Hands down, THE BEST, easiest to understand, simple , to the point, well explained instructional video on RUclips! I watched 10 or 15 other videos before I watched this one. I wish I watched this one to begin with. After watching your video I went out and adjusted my carb afterwards with ease, and my C2 327 vette purs like a tiger! Thank You!
I can’t believe how many bad videos are out there. Lol
Thanks for watching and thanks for the feedback
@@ProblemSolverGarage Have you ever pulled the adjusting rod out for the wiper door? I have a 68 and had to take the adjuster off to move vaccum canister . When I went to put in back on I found out it wouldnt tread back in because of it being stripped.
Thanks a lot.
I’m a professional Precision machinist and have taught many apprentices on the job. And I have to say, This is the best C 3 tutorial series on the internet. Clear, precise, great camera angles and excellent teaching skills. No B.S clown shows going on on this channel.. just great serious educational level content that is presented and articulated in such a way that we instantly become smarter and the lesson is well learned! Time well spent watching this channel for anyone mechanical minded. I think trade schools should make this channel required content for the classroom. I hope this particular channel grows much bigger and gains great success, it certainly deserves a very large audience. Thank you for this particular video, now out to the garage to tune my old holly on the 69 corvette I’m putting back on the road after 9 Years. Great series!
Wow! Thank you for the awesome feedback. I really appreciate it
This guy has good teaching skills. A complete natural. AND also good at recording
Thank you sir
This is a fantastic video especially for someone just learning . A really great job. You can also tune by connecting a vacuum gauge to the intake manifold and then adjusting for the highest vacuum. Eventually you learn to tune by ear
When I was young and living in SoCal, I had a long haired hippie biker dude that was my Holley expert who set up my carb on my jet boat. Now I'm old, far from SoCal and without my hippie carb dude, but still have the same jet boat! Have to set my carb up myself now, thanks for putting together this video. Very clear, easy to follow and understand. I especially like that you don't come off as an "expert", just a guy who knows what he's doing from real experience. Thanks again for the video!
I really can't thank you enough. My father's project car was a 78 vette. He passed away before it was finished. I am by no means any sort of car mechanic, but you have literally held my hand through literally learning how to finish this car. can't wait to have it running, what a beautiful machine these C3s are ❤❤❤
Great camera work. Great info. Great teaching material. No comedy. No excess dialogue. Your a natural. Thanks
Thx
Exactly! Usually in videos all you hear is “uh uh uh uh” in between every sentence. This guy is great!
Thank you so much! With your help I fixed my carburetor! Thanks again from a 68 year old lady that owns a 1985 Chevy. I love my truck!❤❤
Glad I could help, thanks for watching
Great video on how to "dial in" a carb. I never really understood what was meant by dialing in a carb until I watched this video. My 71 Vette runs well and does not blow black smoke, so I guess the carb is set up correctly, but I may verify the settings. Thx for the awesome video.
You're the only guy that adjusted the float with the engine off. Use a vacuum gauge to get the highest vacuum when setting the air/fuel mixture.
Hello, buddy! Thank you very much for this video. I have got almost the same carburetor. But there is no one who is possible to tune it. Now you explaned to me the main principies of Holley carb tuning.
Great video! It is hard to find anyone now that can describe carbs like this....👍
Thx
My Vette has a Holley. I thought they came with QuadraJets but mine is a Holley like yours. I initially found the idle screw and one gas mixture screw. I had no idea about the other stuff you showed me. Awesome !! Now I can hopefully make my car run correctly. Thanks Man
Thanks for the lesson. Best one I have seen. Also thanks for the behind the steering wheel view. 50 years ago I bought a 68 then a 66 with the two tops and then a 69. God, how I miss the view of those fenders rising up at eye level!
They do look cool, thanks for watching I’m glad the video helped you
I have watched many carb tune videos for my new Holley, but this one takes the cake. Exactly the info needed, no more no less. Thank you!
Bro I'm so glad I found your channel fixed my problems with my carb running rich. Thank you
Your video helped me get my 74 F100 running, thank you!
Thank you
Thank you for making this video. Straight to the point on everything.
Great video well done. Also I love the old-school slotted mag wheels. Please don’t change them. Do not go back to the old rally wheels everybody has those.
I dig.the way you present your info .easy to understand and not overly technical to the point of complete Huh!? Thanks good videos
Thanks
I finally found the video of the vette running, damn Tom she runs great and is beautiful....love the series bro
Thx
Hey there! just came rolling in from The Netherlands (Holland)! Thanks a lot! i am rebuilding a 76' Thunderbird and going in it with 'some' knowledge from school (ages ago...)
Thanks for the video! i really needed this :)
Your a lifesaver! Thanks bro
I just picked up a 65 Travelall with a Holley very similar to yours. Great video man, thank you. Definitely earned my subscription.
Thx
great video, great tip to disconnect the power wire from distributor and not adjusting while engine is running. TY
Love your video. I feel more confident about my carburetor adjustment knowledge
I have an Holley 1850 600 carb in My 65 Chevy C-10 pickup. I have a new fuel tank and just put the mechanical fuel pump in her. Tomorrow after work I will attempt to set up the carb as You described it. Thanks for this video. oh and that's a real nice ride you have
Thanks and good luck
I’ve watched the entire series and would recommend it.
Nice and thanks
The BEST and simplest explanation ive ran across! Thank you!
Great video, thanks! I’m a jet mechanic- bought a boat that needs help & I’ve forgotten all my carb knowledge. This was a fantastic refresher!!
I have a 1977 Oldsmobile Cutlass Supreme 32500 original miles with a 750 CFM CLASSIC HOLLEY CARBURETOR thats driving me crazy. Slow exceleration & shakes at stop lights. I'm going to give this a shot although the shop says the dialed it in the bedt they could. Thank you!
Thanks man. You did a real good job explaining that. Keep up the good work!
Thanks and thanks for watching
Before slapping the bad boy on, make sure you check to make sure the transfers slots are set correctly, because if they are not, none of this is going to work. Also, a 15 dollar vacuum gage would be a worthwhile investment to make sure you are getting it really dialed in.... and a wide band o2 sensor would really help as well.
Gonna attempt this tonight. See what happens…Thanks for the video and you got a new subscriber…
Thx
Great video it reaffirms how I always adjusted mine but I would like to suggest you get rid of the fire maker in you fuel line if that’s a filter that separates they are notorious for coming loose and starting g fires
Excellent description of the Holley carb. Got one on 77 ford 700 truck driving me crazy. Your video has help me a lot. Thank you for sharing your knowledge
No problem thanks for watching
Thanks for an excellent, easy to follow video.
Best carb training vid ive ever seen....thanx Bro.
Thank you
Great video. You explain the processes very well. thanks for sharing
Very good info. I personally have never set one but feel a little better at trying
Just installed a new carb on my 454 7.4L big block. This video is providing me with the best information-hands down. Thank you so much for sharing!
No problem thanks for watching
Very informative and understandable 👍👍👍
Very well explained thanks now I think I can start playing with my carb
after long storage my F85 needs this. has a fountain coming out of those needles at the top. thanks for tutorial.
Best video I’ve seen yet.
Thx
Fantastic video, I am going to give it a go after having my carby reconditioned. Thank you.
Thanks for the help. I subbed up! I got a 1987 f350 with a 7.5L 460. My Holley carb is flooding horribly
Thank you, I have the same carb as you, and your video showed me the easiest way the set it, Best video I've seen on this. Thank you
No problem thanks for the awesome feedback
Hey very good video!! Thanks so much!
Very excellent work and video.
Thank you
Great job loved the Information Thanks!!!
So hey. This is a fantastic video. The guy has a great personality and speaks in layman's terms. I learned a lot about my Holley carb from this and so as a professional video director and editor I want to encourage you to make your storytelling even better. Your host says, "Ok" or "Guys" or "Ok guys" about 40 times in a 24 minute span. Beyond working to try not to use those meaningless words at the start of every clip or at the beginning of every thought, start by trading them with the words, "now" or "next". and see if that helps. also, if you record what we call "ambient sound" for 2 seconds at the beginning of each clip with no dialog and only background noise recorded, you can edit out those slips of "ok guys" with relative ease by replacing them with a chunk of natural background noise. Keep up the good work. I'll be watching more of your videos.
Thanks, every time I say “OK guys” Just take a drink 🥃
Thank for a great video helpful 👍
Thanks m8. Really appreciated. Rob
Awesome video 👍
Great video! I recently set a single barrel using a vacuum gauge but wondered how to set the 4 bbl on my 66 mustang. Once I put it back together I feel confident I can dial it in. Thanks.
No problem thanks for watching and good luck with your project
Awesome video! Thanks! One concern, have a fire extinguisher ready, not a water hose. Water will just push a fuel fire around, possibly making it worse. Sorry, thats the Fireman in me. Sweet ride!
Thanks for the input, thanks for watching
Bravo fire...water bad!
And you wouldn't want to run water down the carburetor of a running engine unless trying to convince your wife that without doubt your Corvette needed a new engine.
Great video. Very thorough. Do you have a video on setting initial and total timing?
I do not on the Chevy 350
Super nice video, thank you.
No problem, thanks for watching and thanks for the feedback
Very informative...thanks
Fantastic video the best i ve seen thanks buddy briliant 👍👍👍
No problem thanks for watching
Thanks so much for sharing this video. You are a very good teacher. You took a very technical and complicated process and made it clear and understandable. That is what the very best instructors do. Thanks!
Thanks for watching and thanks for the feedback
Great job 👍🏽
Thank you so much man.
Thank you very helpful
Great information and great explanation thank you 🙏🏼
No problem, thanks for watching and thanks for the Feedback
Great video
thanks 4 video!...
Amazing video.
Your videos are awesome. I have a 1972 with A/C and can't wait for you to start the A/C restoration. I have cold refrigerant all the way up to the valve that leads to the box but I'm not getting any cold air inside the cabin is moderate. Only around 70 degrees, although the line coming out of the valve is 40
Thanks!
Hey thank you, it's greatly appreciated
I have owned my 1967 Sunbeam Tiger since 1978. I restored it over a 20 year period. Recently I rebuilt the Holley 1850 carb... and your video was exactly what I needed to tune it. Thank you!
Guys awesome content really enjoyed the resto. Guys can we get a Guys counter on the vids, 😂 no really man good job keep it up.
Lol
Thx 🙏🏻
Awesome dude! So helpful
That was very good. Ima go do mine asap haha
Thx
Большое спасибо за видео!! Ты хороший учитель)!!
Thank you sir great video
Thanks and thanks for watching
Thanks. Didnt know it had 2 to air fuel screws.
np
I'm new here. Loved it
Thanks, I hope you enjoy the whole series on the Corvette C3 if that’s what you’re working on
Thank you for the video!
I have a problem with my idle, when I'm parked(gear in "parked") and let to idle it's about 900-1000ish after warmed up. When I'm driving around and have to stop at a light or stop sign my (in "drive" gear) rpms drop to about 400-600 and stalls out sometimes.
My question is how do I fix this,it's really annoying and frustrating.
You got my sub! Thanks for the info and other videos! You rock man!!🤘🏽
Thanks I appreciated
Great Series!! Are you in British Columbia 🇨🇦?
Great Video! I have a question, on minute 2:57 when you are adjusting the second idle screw, what is that black hose on top of it and where does it go? My 1850 holley just has a hole there and I feel vacuum when engine is ON. Thank you in advance!
If you haven't found out already, that is a vacuum source to use ported vacuum for the distributor's vacuum advance. Your vehicle must either be using an intake manifold source for the vacuum advance, or not using vacuum advance at all. If not using the carburetor's ported source that you asked about, it needs to be plugged.
Do you have a video to show how to set the electric choke on one of these carbs?
Thank you for the vid brother.
Maybe I can get my 1850 on the Ole 1965 ford pick up to quit pouring gas every where. It has the 249 inline six with an offinhouser intake an the same type of distributor you have so wish me luck.
Just subscribed ✅ nice video! I Love the corvette Also🏆☑️
Thanks and thanks
Here's a big thumbs up!
Have you ever pulled the adjusting rod out for the wiper door? I have a 68 and had to take the adjuster off to move vaccum canister . When I went to put in back on I found out it wouldnt tread back in because of it being stripped.
Good content 👌
Can I trouble you to make a video repairing and or tuning a edelbrock 1406? Thank you for the excellent content.
This was awesome! Thank you. Quick question… my 1987 MC SS on a cold start idles very high for a long period of time and doesn’t adjust until I give it gas. Do I have to adjust choke?
I have a 2 site glass one my double barrel and it doesn't matter which way I adjust the one closest to the radiator, it continuously fills up. I adjusted all the way up and all the way down and it keeps filling up. Any idea what I need to do to fix this? Any help would be appreciated.
There are clear plastic plugs available that allow you to set the float level while the engine is running. Once adjusted you mearly reinsert the metal screws. Much more accurate...
Thsts some good info.
..great video!!
Thx
very good video
Thank you
Do you have a link on the throttle conversions from the quad to a 1850-3 Holley on a 79 corvette?
Hello friend, please tell me how to set up two holly 4160 carburetors on a ford mustang gt 500 big block
First i idle the car up a bit to around 1000 rpm. I always start idle circuit tuning with it fat. Something like 2½ to 3 turn out. Next adjust it half a turn at a time pulling fuel till it runs the smoothest & the fastest. Now i lower the idle to as low as you can with in reason, 500-600 or so depending on camshaft. Add a ¼ turn to one side once again checking for smoothest & fastist idling speed, do this on all 2/4 corners over and over ensuring you have it good as possible. I don't trust counting turns until i have set them by ear. Not all metering orifices & surfaces are identical so gauging them by how they all respond to the same input allows me to determine if one responds differently than the others, all should respond similarly. If one is different then it could be a sealing surface or debris in the flow path or it could just feel different due to resistance caused by corrosion in the threads. U have to judge all this from experience & common sense. Once everything's satisfactory then raise idle to desired rpm. Next start with a half turn out on all corners. Check throttle response, See how it responds to snappy throttle whacks. Try slow and fast revs, bring it up in rpm then whack it. Go 0% tps to 100% as fast as possible. If it stumbles adjust the accelerator pumps as needed. Check how it returns to idle, does it catch itself or does it drop then jump then catch its self. Put the car in gear & observe how it responds, wack the throttle and see if it Boggs. If the accel pumps don't quite supply enough fuel or u don't have parts to change or adjust then you can add fuel to the idle circuit, it will be a little rich but will have better response and off throttle torque. You just have to picture what's happening from the carb to the combustion chamber. The engine has to respond to stimulus and some times that taks time so it gets a big gulp of air without the right amount of fuel and it stumbles, so how bout we have a little extra fuel already in the cylinders so that when that big intial Serge of air gets there the fuel is already there & in fact its already started burning so the engine responds immediately to the air & but the time the fuel from the accelerator pumps get there with the fuel picked up in the Ventures from the boosters there is no hesitation bogg, it just responds. Maybe it gets a big swigg of fuel and the air isnt there yet. Just picture what its doing & why, picture what it needs and when, some things are give & take. Its simple... Air, Spark, Fuel. I probably sound half we todd it but its just that simple. You can get anything you want from a carb, any AFR at any RPM & even get different ones at all different RPM'S & engine loads. If you have a good carb with air bleeds it's just this simple to understand..... The carb is a straw & the engine is the person drinking. The signal or fast moving air getting sucked through the carb is someone sucking through a straw. If the straw is good you get pure liquid right? Well if the straw is cracked or has a hole its harder to get the liquid. This is basically a carbs design, you get a certain amount of liquid & a certain amount of air. The larger the hole the more air you get. Depending on where the hole is & how big it is determines how much of each you get, say for every 1 drop of soda you get you get 14 times more air. Now suck a little harder & cover one of those holes or air bleeds in the straw. Now you get more liquid, say 10 parts air & 1 part liquid. If that's too much then open the second hole back up & just block it by half. Now you get 12 or so parts air and 1 part liquid or fuel. Thats right on the money for makin power. Carbs are simple. Power valves, air bleeds, booster size or design etc. are all simple things that work together to deliver fuel. How come we don't teach these little physics demonstrations and experiments in schools? Kids need to see something to understand it, why not a Holley carb on top of a rowdy SBC they got to build then tune & rev the snot out of???? Now days people are just headed to the ((Hall of Fame of We Todd It civilizations)) lol.
Cool 'Vette. I don't mean to be a party pooper, but your accelerator pump should be adjusted to take out ALL clearance. Holley's recommended .015" clearance is referring to an additional pump arm movement when the throttle is wide open to keep from overstressing the diaphram. Also, the float level adjustment should be done with the engine running and adjusted to just lightly trickle from the sight hole. Your adjustment seems to be a tad low and between those two things I would expect you to have a slight hesitation.
Great job sir.
Thx