need help with timing and carb
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the rxzero
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need help with timing and carb
ok here is what I have 12a holley int. holley 450 with .025 squirter blaster 2 coils my problem is it carrys on when i step on it but if I push slow on gas it will drive ok when I dump on it it backfires and runs like crap can some one help me figure it out its driving me crazy my fuel pressure is set at4.5 do I need to put in a return line?
Last edited by rotorysuzuki; 02-27-04 at 09:03 AM.
#2
Nikki-Modder Rex-Rodder
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Where the hell's Carl?
He knows more about Holleys than I do, but it sounds to me like you have too much pump shot.
I also don't know alot about timing, but I run mine as Paul Yaw prescribes on his site. I don't know if that will help you.
Does the 450 have a two position AP cam?
He knows more about Holleys than I do, but it sounds to me like you have too much pump shot.
I also don't know alot about timing, but I run mine as Paul Yaw prescribes on his site. I don't know if that will help you.
Does the 450 have a two position AP cam?
#4
Airflow is my life
First off, you rigged it for mech secondaries? Why? Youll probably need a bigger squirter if you wanna go that way, and more cam duration. What cam and what position are you using? And is there still a spring in the vacuum box? Which color? You shouldnt have a problem deadhading it. Is this a rotary prepped carb? Or a plain jane out of the box carb?
And where the hell is Carl anyway??????
And where the hell is Carl anyway??????
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4.5 psi fuel pressure seems kind of low to me. I always used 6-7psi on my N/a's. Does the car smoke black? If not, you need more fuel,... if it smokes black, turn the fuel down until it doesnt anymore. Either that, or make an o2 bung in your header and wiband it.
Jonathan
Jonathan
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the rxzero
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no I didnt rig it for mech it comes that way its a holley 450 from summit it has a pink cam and I have tried both positions also have tried a 31 squirter and a 25 and it bogs and then revs and at high rpm breaks up with the 31 it runs better with the 25 but still cant take the pedal pushed hard I also have a 1" carb spacer sq bore on there
#7
the rxzero
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I just tried uping the fuel pressure and changed cam position with 31 squirter and if i push the pedal slow its ok till high rpm then it carrys on and if i just dump on the gas it is real crappy
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Nikki-Modder Rex-Rodder
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Originally posted by Rx7carl
First off, you rigged it for mech secondaries? Why? Youll probably need a bigger squirter if you wanna go that way, and more cam duration. What cam and what position are you using? And is there still a spring in the vacuum box? Which color? You shouldnt have a problem deadhading it. Is this a rotary prepped carb? Or a plain jane out of the box carb?
And where the hell is Carl anyway??????
First off, you rigged it for mech secondaries? Why? Youll probably need a bigger squirter if you wanna go that way, and more cam duration. What cam and what position are you using? And is there still a spring in the vacuum box? Which color? You shouldnt have a problem deadhading it. Is this a rotary prepped carb? Or a plain jane out of the box carb?
And where the hell is Carl anyway??????
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