in need of holley help!!

sledheadrevxp · May 13, 2011

is there anyone around the edmonton area that has a knack for holley carbs, i just put a 572 into my 81 camaro and having some tuning issues, thought it was all timing but the carbs in need of some setting i think too. has a holley 750 double pumper on it. almost seems like its running out of fuel at one spot then over fueling, damn thing. also if anyone knows what the trick to setting timing with an msd ignition system that would be great as well. cant just throw a normal timing light on them and cant remember what the trick to it was
thanks folks

Summitric · May 13, 2011

Is the car automatic or standard....... Without knowing what you have, i would suggest the 750 is too small for a 572ci engine to begin with. If it's an automatic transmission, you should be running an 800 or 850cfm vacuum secondary carb. What do you have for fuel supply pump and what size fuel lines and what type fuel filter???

sledheadrevxp · May 13, 2011

its an auto, th350 stage II holley electric fuel pump, have it set at 6 psi, running 3\8 fuel line from one end to the other

Summitric · May 13, 2011

sledheadrevxp said:
its an auto, th350 stage ii holley electric fuel pump, have it set at 6 psi, running 3\8 fuel line from one end to the other

vacuum secondary carb would have way better driveability with an automatic than the double pumper, for street use. Is the pickup in the tank modified too, or still stock? And how is the sock filter in the tank? Are the clearances on the accelerator pumps on the carb set properly? Float levels set properly? You need to get the timing set up properly before you worry about the carb i suspect

gotboost · May 13, 2011

hummm turbo 350 in there i hope the 572 isnt the 620hp one or your tranny is going to chit out sideways that alot of hp for that tranny i have a very heathy 468 big block in my chevelle and i run a 850 double pumper carb if u are every in edmonton get promax to tune it up they do awesome work and if u have some spare cash kicking around throw that carb away and run a fast efi system there $1900 and all your probs will be solved the fast efi is an auto tune it tunes to your car when u drive it :d

magnet · May 13, 2011

gotboost said:
hummm turbo 350 in there i hope the 572 isnt the 620hp one or your tranny is going to chit out sideways that alot of hp for that tranny i have a very heathy 468 big block in my chevelle and i run a 850 double pumper carb if u are every in edmonton get promax to tune it up they do awesome work and if u have some spare cash kicking around throw that carb away and run a fast efi system there $1900 and all your probs will be solved the fast efi is an auto tune it tunes to your car when u drive it :d

what he said you will spend over half that on a good carb, big enough to supply the ole girl, and you still wont be happy with it. especially a holley whenever the clouds cover the sun you will have to retune it. go with the efi drivability waaayyy better as well as dependability factor goes way up to.
as for the th350. i hope you got lots of them cause youll needem.
sounds like a sweet ride though need pics of complete car and under hood engine bay install etc to properly diagnose the problem.:d:d :beer:

Summitric · May 13, 2011

Worked on lotsa th350's that are built to handle up to 1000hp......... No worries if it's built properly.

sledheadrevxp · May 13, 2011

im not worried about the tranny, it was built by mel at excell tranny in red deer, the guy is unbelievable, said 850 hp through it no problem. it should be running 675 hp. running stock pickup in the tank. never had a fuel issue before but never had that kind of fuel demand in it before either, just pulled out the 406 stroker and ran a 700 holley on it. i am really not interested in going to a fuel injection system. ive spent way to much on this beast already and the savings account is taking a ch!t kicking. if i change nything i might go to a 850 quick fire carb. they are suppose to be unreal

sledheadrevxp · May 13, 2011

also if i went with a new carb i would go with a vaccum sec
i put up an album of it on my profile with a couple pics of the car

magnet · May 13, 2011

nice

:d best part is it all fit under he hood, probably an exc somewhat sleeper except it probably shakes the windows out of the tercel beside it when its idling at the light. :beer:

Summitric · May 13, 2011

Pics look good....... Get that upper rad hose secure/strapped onto the shroud so you don't have fan blade interference happenin'

......... There's a few camaro's running around the park here with the same engine in them..... One does have the quickfire, and works awesome.... Think he was running low 11's with street slicks and 4.33:1 ratio and turbo 350 with 4000 stall

sledheadrevxp · May 13, 2011

thanks guys, ya it sounds pretty rough when its at idle, most everything is merlin but went with a comp cam, theres a few things to clean up yet, have to put different upper rad hose on it all together, get the heater tapped in, still working on getting a ps pump bracket to work. everything i have tride so far has had the pulley touching the ps box and had the pump at a very shitty angle. might have to go to a smaller pulley or a pump with a remote res

sledheadrevxp · May 13, 2011

heres a link to it the first time i fired it after cam break in, sound is rather shitty it still had open headers so the mic on the cam kind got distorted
[media]http://www.youtube.com/watch?v=yIuKdHAILco[/media]

AreWeThereYet · May 13, 2011

I have always found Holleys to be too finicky, opted for Edelbrocks instead.

sledheadrevxp · May 13, 2011

AreWeThereYet said:
I have always found Holleys to be too finicky, opted for Edelbrocks instead.

i have tried many edelbrocks in the past and can not honestly find a good thing to say about them. never had one that worked right for me!

Murminator · May 14, 2011

Summitric said:
Worked on lotsa th350's that are built to handle up to 1000hp......... No worries if it's built properly.

I'm with Ric on the TH350 thats usually a big wives tale on "having" to have a TH400 turbo 350's were bolted to big blocks in tons of heavy duty applications from station wagons to grain trucks to military vehicles they can handle some big torque outta the box. The 400 does have a lower 1st gear, more clutch packs to keep cooler and a larger tail shaft to accommodate larger u joints causes that is really the weakest point, but the 350 will handle the day to day drivability better.

......as for the carb when I was growing up "carburetor" was French for don't f#%k with it

sledheadrevxp · May 14, 2011

well i lowered my fuel pressure to 5.5 psi and lowered my float bowl levels a bit and its performing way better, still not right by no means but getting better

gotboost · May 15, 2011

this might help its on kijiji calgary :d

drford · May 25, 2011

Is this the carb that came on the crate motor if so they have a lot ofproblems. Put a 850 Holley or demon on it have done many the stock gm Holley is a pos

sledheadrevxp · May 26, 2011

i had a different carb then you get with the engine, finally said to hell with it and pitched that holley out into the bush and put on a quick fuel 850, works awsome now, heres a youtube link of it with the new carb
[media]http://www.youtube.com/watch?v=748ak_F4zJI&feature=mfu_in_order&list=UL[/media]

in need of holley help!!

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