what is the best carbuerator to use on a 220 conversion

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PJCREWS
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what is the best carbuerator to use on a 220 conversion

Postby PJCREWS » Tue Jan 15, 2013 1:03 pm

Have a freshly built conversion and having issues with it. I have a 4412 holley 2 barrell that we rebuilt.
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Bruce
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Re: what is the best carbuerator to use on a 220 conversion

Postby Bruce » Tue Jan 15, 2013 1:05 pm

i ran an ma 45 aircraft carb on mine ran perfect
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JAMES
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Re: what is the best carbuerator to use on a 220 conversion

Postby JAMES » Tue Jan 15, 2013 1:09 pm

PJCREWS wrote:Have a freshly built conversion and having issues with it. I have a 4412 holley 2 barrell that we rebuilt.

WHAT BRUCE SAID IF U HAVE THE $$ ANOTHER THING IS U MAY HAVE PROBELMS BECAUSE THE CARB ISENT RIGHT U SAID YOU REBUILT IT AND IF ITS NOT 100% THEN ITS NOT 100% .... WHERE ARE U LOCATED ?
I LOVED MY 4412 ON MY 220/470 IT RAN GREAT BUT THE CARB WAS TUNED RIGHT AND BUILT RIGHT !
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PJCREWS
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Re: what is the best carbuerator to use on a 220 conversion

Postby PJCREWS » Tue Jan 15, 2013 1:16 pm

In labelle swfl this is the same boat that midnight rider is speaking of with jet sizes. Yea it may not be right but before i buy a new one i wanna make sure which one to use
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John Fenner
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Re: what is the best carbuerator to use on a 220 conversion

Postby John Fenner » Tue Jan 15, 2013 1:58 pm

500 cfm, we've run the 450 4 bbl as well it gives a bit more cruise mileage and has the secondaries to get out of trouble, but they require the rear metering plate kit to jet it accordingly.
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Re: what is the best carbuerator to use on a 220 conversion

Postby midnight rider » Tue Jan 15, 2013 2:35 pm

John what size jets do you recommend. Also I called Holley today and they said 350 Cfm was better for 470 cu in with rpm redline of 3000. Said the 4412 500 Cfm was intended for a motor turning up to 5000. I see everyone is saying bigger jets. I m thinking that's cause of too many cfms the 500 gives. Also what do you suggest for the timing when it has dual impulse.

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John Fenner
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Re: what is the best carbuerator to use on a 220 conversion

Postby John Fenner » Tue Jan 15, 2013 2:55 pm

I run 73 jets, blocked power valve and 24° on my 220/470 conversion with the 8.6:1 pistons and have good response and mileage.
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Re: what is the best carbuerator to use on a 220 conversion

Postby midnight rider » Tue Jan 15, 2013 3:41 pm

That's pretty muh the same as this one


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