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#1 |
Registered User
Join Date: Dec 2001
Location: CHARLOTTE N.C.
Posts: 59
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Identify this Carb??
I was wanting to know if anybody could identify this HOLLEY Carb. It is a double pumper.. What CFM? Is it a good carb? The only #'s I could find on it is
these. 70645 4778-4 1038 |
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#2 |
Senior Moment
![]() Join Date: Mar 2002
Location: Pittsburg Ca
Posts: 4,139
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The 4778 # says its a 700 CFM. I had a 4777 650 CFM on my small block and liked it
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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#3 |
Registered User
Join Date: Aug 2001
Location: rock island,il,usa
Posts: 5,382
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Its 700 cfm, but my book is too old (dont have a listing on the -4), so i cant give all the specs on it. You might try the Holley website....
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#4 |
Registered User
Join Date: Dec 2001
Location: CHARLOTTE N.C.
Posts: 59
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How would this Carb work on a 350 w/ mild cam??
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#5 | |
Señor Member
Join Date: May 2002
Location: Edge of the world
Posts: 5,367
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Quote:
</out of touch with modern carburetor methodology... just going on old knowledge>
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#6 |
Senior Moment
![]() Join Date: Mar 2002
Location: Pittsburg Ca
Posts: 4,139
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I would say you might re-jet but would work fine
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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#7 |
Registered User
![]() Join Date: Sep 2003
Location: Waterloo, IA
Posts: 1,147
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It's also a double pumper.
Like 1970 CST said, jet it down and it should work fine. Check out www.mortec.com - it has Holley carb information and tuning tips as well as a lot of other info.. Paul
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'72 Chevy K20 - 383/4sp/205 - SOLD after 41 years in the family Next project - K/5 Tahoe (71 Blazer on 99 Tahoe chassis) Build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=789958 |
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