Holley carb question
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Freshman User
Joined: May 2004
Posts: 41
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From: Regina, Sask. Canada
Holley carb question
I have a 4-bbl Holley carb. & I was wondering what its cfm capacity was. Here are the markings on the throat:
LIST 8007
1078
and near is a number: 4208.
I was wondering if I could use this on a 240 6-cyl equipped w. an Offenhauser
intake & split exhaust headers
LIST 8007
1078
and near is a number: 4208.
I was wondering if I could use this on a 240 6-cyl equipped w. an Offenhauser
intake & split exhaust headers
Thread Starter
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Freshman User
Joined: May 2004
Posts: 41
Likes: 0
From: Regina, Sask. Canada
A Holly 390 cfm on an Offy- equipped 240 (3.9l)
I'm still working on fitting the original air cleaner to this large-throated carb. I would use an aircleaner meant to fit this new carb., except this is in a van so space is an issue.
I'm close; have all of the linkages hooked up but have yet to hook up the vacuum advance (no problem), fuel line (a bit of a problem) and pcv line (more of a problem; read-doghouse).
I'm close; have all of the linkages hooked up but have yet to hook up the vacuum advance (no problem), fuel line (a bit of a problem) and pcv line (more of a problem; read-doghouse).
FTE Chapter Leader
Joined: May 2002
Posts: 42,586
Likes: 3,122
From: Fraziers Bottom, WV
I would go with a larger CFM, if you do the math a 390 is just on the limit and not much room for change. My 390 works well and can be modified to do more. The linkage is not a problem if you find a cable bracket. The carb has a port for PCV valve and I purchased a metal fuel line 40 inches and bent the line to come the front of the valve cover the across then at a 45* to the back down and the toward the carb inlet. I used an inline clear filter with rubber hoses! Works great!
