Anybody know what size the IFR is in a 80781
850 cfm 4150 could not find online anywhere
HOLLEY 80781. IFR
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Re: HOLLEY 80781. IFR
by rgalajda » Sat Sep 16, 2023 8:31 am
Some of these 850's with a choke horn that I have measured were .036 or .037" IFR with about .073 IAB , if that helps
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Re: HOLLEY 80781. IFR
by CDN » Sat Sep 16, 2023 7:22 pm
Yes has choke horn etc. ,fixed air bleeds if its in the .036/37 thats interesting just put on m car while carb at Marks
I had to get mix screws out 2 turns to get to idle high 13’s but it idles fne
My Hp 1000 i put .031 ifr .073 to get it to idle clean in he 13’s but its been messed with alot blp parts etcetc
Anyway just curious his old 850 80781 is box stock idles ok but definitely needs more fuel underload
Tks for info
I had to get mix screws out 2 turns to get to idle high 13’s but it idles fne
My Hp 1000 i put .031 ifr .073 to get it to idle clean in he 13’s but its been messed with alot blp parts etcetc
Anyway just curious his old 850 80781 is box stock idles ok but definitely needs more fuel underload
Tks for info
- CDN
- Posts: 60
- Joined: Wed Mar 24, 2021 4:19 pm
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