Holley Carburetor Tuning Into

[@other4637]

It's great to have a person doing a" how to video" first have a vast knowledge of the subject , and second that they take the time to explain the function of all parts related . So many time i've watched videos of complex jobs like engine or transmission repair or overhaul and they don't let you see what or where they touching as they do the tear down or assemble and they go thru it as if they are in a race .

[@darkmachine165]

I'm new to Carburetors this has answered many questions I had THANK YOU!

[@williambutler8624]

Great video, your videos have helped me more than other videos I've seen, you explain everything good and in detail, I'm working a Holly #1850 /0985 accelerater pump not working, installing new diaphragm, hope this solves my problem, THANKS.

[@tonycappuccino6809]

Your knowledge and expertise saved me some serious headaches. My idle has been perfect but at load I’ve had issues , damn if it wasn’t the gasket on my power valve !!!!! Tyvvvvm!!!

[@vernonyow4852]

I'm sure glad you made these videos on the in-depth of the idle circuits with the Holley 4150...really help me understand alot more on mine...thanks again and keep making more videos..

[@randallcribb7015]

+Vernon Yow thanks for watching , if I can help with some information please let me know. randy

[@68chevelleconcours]

Thanks Randy! I have a 670 I just bought and it has a few small issues that can be adjusted out but I wasn't sure what to do. You've already given me some good info so I'll continue to watch the other videos to learn more details.

[@randallcribb7015]

+Kevin Rader ,if you have a specific problem let me know, will try to help you randy

[@68chevelleconcours]

+Randall Cribb Thanks to the video I was able to get a good idle. The butterflies were open way to far on the front so now I've gotta work on a hesitation when the rear barrels open. I haven tried it since I fixed the idle issue so the hesitation may be gone but I can't imagine the small adjustment on the front barrels would fix that. Do I need a different spring on the diaphragm to get the rear to open at a different rate? Sooner/later?

[@randallcribb7015]

+Kevin Rader , Kevin first make sure your float level is right , next I would try a stronger rear diaphragm spring also you might need to jet up a couple sizes in the rear .Hope this helps if not let me know. Randy

[@BreakAndRestore]

You are a natural teacher. Thank you very much and I hope you share more of your knowledge.

[@holleycarbshowtosadvice40y90]

I appreciate that and by the way, my original channel got hacked , I have re-uploaded these videos and 8 others to my new channel (Holley Carbs: How To's & Advice ,40 yrs of exp.) please subscribe to this new channel, where we upload several new videos weekly thanks. -Randy

[@christiangriffin4869]

This is a great video! Very informative. Looking forward to seeing more!

[@holleycarbshowtosadvice40y90]

thank a lot, by the way my original channel got hacked , I have re-uploaded these videos and 8 others to my new channel (Holley Carbs: How To's & Advice ,40 yrs of exp.) please subscribe to this new channel, where we upload several new videos weekly thanks. -Randy

[@IBMara]

Thank you. Very well presented and informative. Your experience and knowledge comes through loud and clear.

[@randallcribb7015]

+Leo M. Mara , thanks for watching the video , if I can help you with some information please let me know . randy

[@holleycarbshowtosadvice40y90]

by the way my original channel got hacked , I have re-uploaded these videos and 8 others to my new channel (Holley Carbs: How To's & Advice ,40 yrs of exp.) please subscribe to this new channel, where we upload several new videos weekly thanks. -Randy

[@wilhelmkaiser8307]

Randall Cribb ?

[@jeepmoab1]

thank you so much for taking the time to pass on the information, please keep it up!

[@jerzzzeyful]

Yes I would love to see more info on power valve selection....the use or not use of power valves in the rear...properly jetting...and properly setting the primary metering block...this was an informative video and I got alot out of it...Thanks.. keep up the good work

[@holleycarbshowtosadvice40y90]

thanks Eddy by the way my original channel got hacked , I have re-uploaded these videos and 8 others to my new channel (Holley Carbs: How To's & Advice ,40 yrs of exp.) please subscribe to this new channel, where we upload several new videos weekly thanks. -Randy

[@donrutter6765]

Read your engine vacuum guage, power valve should be half that number for a regular street motor. 13lbs vacuum requires a 6.5 power valve.

[@jakefriesenjake]

@@donrutter6765 at an idle right? My idle Vac is 5". I should put in a 4.5"pv. If I put in a 8.5", (thats 5" lower than my cruise Vac), when the boosters kick in, that pv is open already, giving me a super rich transition (10 afr)

[@Maquarr]

I'd LOVE to see a video of how to know what accelerator pump cam to choose and what the difference is in all of them.

[@donrutter6765]

Maquarr Steeper the ramp angle the faster the intensity of squirt, if you have a off-idle bog you can try a different ramp, or a different # accelerator pump squirter. Most Holleys dont stumble from too much fuel off idle, they stumble from a lean condition because it takes a split second for the fuel to catch up with the air, because opening the butterflies is instantaneous, but the venturi effect has to catch up carrying fuel.

[@davidmyers9127]

Thanks for the info. Much appreciated. I was hoping for more of these! I have a 4160.

[@randallcribb7015]

hey guys ,I've got 40 plus years experience in carburetor repair and modifications , just wanted to reach out and help , love racing and hotrods , have a lot of experience in tune up and carb repair information.Randy

[@dpooo4304]

Need Major Help. Can I contact you.. Thanks Dean.

[@kylesmith5347]

Do you accept rebuild work?

[@crimthegrim]

Love it keep it up sir! So helpful! Do you have any tips or break downs on a Holley truck avenger?

[@sammyclick3019]

Please keep the videos coming! You explain everything very thorough.

[@michaelparadisis4076]

Excellent video Sir. Thank you.

[@phillipstanford3548]

Thanks for the video. You have a lot of knowledge on the subject. You have been a big help.

[@racingrookieoftheyear4938]

Great and Informative video! Looking forward to more to come

[@00TreadStone]

Great video! Thanks for putting it together!

[@TangodownNZ]

Thanks mate from New Zealand. What if we do all this with the idle mixture screw, and it’s still running rich

[@johnvanwie6172]

I have an AMX with a crossram. I'm running two 1850s and want to work with them especially with idle circuit. How about some tuning advice for two carbs.

[@jsavona3]

Great videos. Please make more.

[@arminteriors8590]

Love it. I am a beginner. I have an old 80453 that has given me fits. You have already helped me to get it to idle properly. Cannot thank you enough!! I am subscribing! PS. I am a girl. So if you can make me understand you ARE an expert. LOL

[@holleycarbshowtosadvice40y90]

thanks for subscribing ,let me know if I can help thanks again

[@holleycarbshowtosadvice40y90]

by the way my original channel got hacked , I have re-uploaded these videos and 8 others to my new channel (Holley Carbs: How To's & Advice ,40 yrs of exp.) please subscribe to this new channel, where we upload several new videos weekly thanks. -Randy

[@eugenewest11]

Another great how too lesson. Thanks

[@divchief07ut]

Great video but what if the float level can not be adjusted to get fuel to the hole? I have backed the screw out until the adjustment nut seats on the shoulder and the screw will not lock it down. Help! BTW - It runs well as it is

[@steveogregg6940]

MORE VIDEO'S PLEASE!! THANK YA!!

[@ktor538]

Thank you sir, for the information!

[@panheadwillie59]

Great video yes more 4160 to 4150 best way to convert for a 78 Ford F-250 4x4 auto trans /460 real techs are Very hard to find these days Many thanks

[@TheThirdWheel618]

Your videos are great ....we like them we love them we want more of them ...

[@ralphvalkenhoff2887]

Hi Randy, Thank you for the great video. From the sound of it, you probably aren't anywhere near northern colorado at 5k elevation. I've got an 85 dodge Ramcharger with a 360, 9.5/1 compression, RV cam, and my small 2 bl Holley just doesn't want to cooperate. It stumbles off the get-go, auto choke doesn't stay on long enough to make it drivable when cold and to make things worse, I had to jet it way down and change the power valve to pass emissions. Any suggestions b4 I install a Holley efi?

[@bobbywilliams5657]

Thanks you very much for the info 💯💯

[@speckkrod7520]

Thanks, I really enjoyed this and learned a lot!

[@jayparsons8804]

I recently bought a 67 Mustang with A 347 stroker Holley carburetor I think it's a 4160 it is a racing carburetor it is tuned for 9300 feel but were I live it's only 886 feet.i think it has size 66 jets in it now.just wondering if you had any idea where I should start?

[@scottsdaleanimalhealthcare7080]

Excellent video. Please do more!!!!

[@chrisbaczynski2184]

Randy have an issue with Holley 4160 will not change mixture with idle screw adjustment everybody says a metering block is bad do you have a fix or am I missing something is there something plugged in it is it cracked ?. Primary butterflies are set according to 60 thousandths required for vacuum I adjust off the rear butterflies my idle speed. Wants to run rich even with mixture screws adjusted only at 3/4 of a turn. Power valve is plugged off. Thank you Chris?!

[@cannonballken9807]

This helps a bunch, thanks.

[@ogsgarage7889]

Great explanation Randy!

[@musclecar29]

excellent video nice job

[@wheelstandr]

Great Video. Hope to see more!

[@holleycarbshowtosadvice40y90]

thank you by the way my original channel got hacked , I have re-uploaded these videos and 8 others to my new channel (Holley Carbs: How To's & Advice ,40 yrs of exp.) please subscribe to this new channel, where we upload several new videos weekly thanks. -Randy

[@RicardoEP]

My secondary venturies on a street avenger are not injecting any fuel at all into the intake (even when those throttle plates are wide open), I know for sure that the fuel level is all good and set on the secondary chamber... what am I missing?

[@kurts7268]

Great videos

[@TheThirdWheel618]

I would like to see a 2bbl video there's the 7448 350 cfm and the 4412 500 cfm used as a performance replacement for the stock 2bbls of yester year I have the 4412 on my 69 f 250 390 I need to learn to modify re jet power valve etc for better fuel economy and performance these 2bbls can support up to 600 HP on circle trackers

[@moeshouse575]

YEP if you have a Holley carb you soon love adjusting them. this week end, next week end, next week end, next week end. next week end, next week end. you get the idea.

[@skywaves5175]

I learn a bit and I want to thank you..

[@gueroflores1467]

hello randy need help on my ford f100 got the 460 got a Holley 650 cfm having. a up and down surge on idle what could be the cause of this up and down engine surge

[@TwoWheelRocco]

Sounds great do more.. thank you

[@holleycarbshowtosadvice40y90]

thanks

[@holleycarbshowtosadvice40y90]

thanks by the way my original channel got hacked , I have re-uploaded these videos and 8 others to my new channel (Holley Carbs: How To's & Advice ,40 yrs of exp.) please subscribe to this new channel, where we upload several new videos weekly thanks. -Randy

[@dirtyworkzracing2747]

What do you if you’re running power vaule blocks on front primary and secondary and the motor bustes n spitting at full throttle?

[@jerimykeys2607]

If you can I would love to see some stuff on the 4412 500

[@jerimykeys2607]

+Randall Cribb no I'm in Houston Texas we run arklatex factory stock rules for dirt track, this is our rule for the carb. Cast Holley 4412 -2 barrel only. Must be unaltered. Choke plate may be removed. 4412 must be cast into choke horn of carb. Maximum spacer and adapter 1” combined total. Fuel pump must be in stock location for make, NO electric pumps or fuel injection even if factory equipped.

[@austinh.4824]

When you adjust the idle mix screws, is the car in park or drive with foot on brake? Also, my choke won't close?? Could this in any way be causing the plugs to foul? Or just that it's running too rich?

[@colby9594]

not 100% sure but i think i remember hearing you do it in drive to simulate sitting in traffic since there is more of a load on the engine (if you have an auto trans)

[@mikez1560]

how familiar with ethanol carbs? good videos.

[@jlh8296]

Excellent videos!

[@holleycarbshowtosadvice40y90]

thanks Jeffrey by the way my original channel got hacked , I have re-uploaded these videos and 8 others to my new channel (Holley Carbs: How To's & Advice ,40 yrs of exp.) please subscribe to this new channel, where we upload several new videos weekly thanks. -Randy

[@henrikpoulsen9451]

Hi I have a question I have a Holley 4150 LIST#80309 3259 it´s a marine carburetor! The thing is I bought a trickit and then I forgot to check the placement of the nozzles on the secondary side One is 80 and the other is 90 so when you look at it which one has to go where I hope someone can help me... thanks Henrik Denmark

[@MrGuitarguyadam]

How do I know what is the correct accelerator cam to use on my throttle linkage??

[@delas7389]

I have a big block with 2 450cfm and they are completely locked up fuel Wise... absolutely zero fuel flowing with the bowls full. The motor only sat for about 6 months... scratching my head

[@jakefriesenjake]

Do not use a power valve that's only like 2" lower than your cruise vacuum. (Cruise 15", pv = 8.5) Sure, once your cruising, it can work, but at low speed when your taking off from a stop light, the power valve will be open at idle (if your idle vacuum is 5"), and once you transition to the boosters, it'll still be open causing waaaay rich! (10 afr). You need a pv that's lower than the idle Vac. (4.5" pv)

[@tritonbradford1688]

👍

[@johnjohn4465]

FIVE STARS !!!!!!!!! John

[@nwmod39hudson53]

keep em.coming!

[@randallcribb7015]

+Nwmod39 Hudson thanks for watching . if you need some help let me know , please share this video. randy

[@nwmod39hudson53]

+Randall Cribb i have a street avenger 670.i am having issues with. its a fresh rebuild and i fired and broke in new engine with it. ran ok but seemed super rich. i changed nothing in it and now it only sputters voughs and then backfires through carb. i can put my 650 mechanical secondary carb on it and it run fine with only a hard throttle stumble. so i feel its within the 670 somewhere but cannot figure it out. any.ideas? thanks.

[@holleycarbshowtosadvice40y90]

with engine off , open the throttle to see if your accelerator pump is squirting gas , should be two squirts of fuel out of the accelerator pump discharge noozles , looking inside the top of the carburetor with a flash light while opening throttle, if accel. pump not working , its best to remove the carb from the vehicle and remove philips head screw holding accel pump discharge noozle and remove check valve that sets under the screw , lot of times this check valve sticks and needs cleaning , check valve is tapered to a point on one end , that pointed end points down in the carb flat end points up towards screw, you may need to up the size on the accelerator pump discharge noozles .003 thousanths at a time . size of discharge noozle stamped on the housing, if this does not help let me know, hope this helps.

[@richardstrach6104]

COOL.. thanks

[@rick3095]

thank u

[@diostodolopuedes4343]

Buenas amigo yo tengo un carburador de ese mismo tipo holley 4 y me presenta una falla me ahúma toda las bujía y pone a fallar el motor ,hay mucho pase de gasolina y no consigo la falla en el carbulador

[@5915chevy]

More Randy more

[@holleycarbshowtosadvice40y90]

thanks very much by the way my original channel got hacked , I have re-uploaded these videos and 8 others to my new channel (Holley Carbs: How To's & Advice ,40 yrs of exp.) please subscribe to this new channel, where we upload several new videos weekly thanks. -Randy

[@S65463u]

I am building my first sbc 350 and tryin to make about 400 hp with a hot cam and i have a holly that came with my car and i want to put on on my engine do you have any suggestions for a good carb to start off with?

[@stupidman9774]

zach. 800 cfm rodchester uni flow.

[@donrutter6765]

For 400hp you will need a Holley 4777 or 4778. They come with a dash # like 1,2,3,4 etc but that just means the years they progressively added things on or took things off. A 4777 is a 650 double pumper, a 4778 is a 700 double pumper. You dont need a 750 cfm for 400hp, on a 350 you will just be wasting more fuel. If you built an all out race 350, 800 cfm is what you need to get, a 383 race motor will require a 850cfm.

[@captainsaveahoe7401]

hello sir I have a question if my carburetor isn't adjusted properly can it cause my engine to only run on 4 cylinders instead of 8?

[@donrutter6765]

Captain Saveahoe If its too rich it can foul your spark plugs. Does it stink and burn your eyes ?

[@captainsaveahoe7401]

Don Rutter yea I can smell the gas coming from the manifolds once its warm but I think that's from the gasket

[@rimaman8681]

ive been watching so many of these holley carburettor videos but not one video touches on the issue i have , primary metering board is leaking mysteriously i have the carb kit new seals etc ive cleaned up the carb good and cleared all the holes and put it back on the engine after moving the throttle the primary metering board leaks i tear it down check it everything is perfect put it back on and it leaks after it squirts feul , wtf im sick of fucking holley carburetors youre stopping me from having my car fucking doing my head in i want to drive it before i get old sick and die