Nice Carb Info
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Freshman User
Joined: Apr 2002
Posts: 42
Likes: 0
From: Utah
Nice Carb Info
I got this from Holley (holley.com). Use this formula to pick your carb.
(Engine size in C.I.D.)*(Maximum RPM's)
----------------------------------------====CFM @ 100% VE
3456
Example-
240*4500
---------=312.5 CFM, so around 300 CFM at 85-90% VE
3456
So from what I've read, these I-6's are over-carbed.
(Engine size in C.I.D.)*(Maximum RPM's)
----------------------------------------====CFM @ 100% VE
3456
Example-
240*4500
---------=312.5 CFM, so around 300 CFM at 85-90% VE
3456
So from what I've read, these I-6's are over-carbed.
Post Fiend
Joined: Jan 2000
Posts: 5,330
Likes: 17
From: Dryden, ON, Canada
Nice Carb Info
Actually, the stock Carter YF 1bbl is rated at around 220 CFM, which is plenty for a stock low revving 300(HP peak @ 3600, not much past it), and a 240(HP peak @ 3900), if the 240 indeed is running one, the 66 I pulled my head from had an Autolite 1100.
1982 F100 SWB
300 HD, 9.5:1 compression 1.94/1.60 valves
Clifford 270H, Hedman Hedder
2½" duals
NP 435/2.75 geared 9"
1985 F150 HD, 300 HD/needs a NP 435/4.10 geared 8.8
70,000 miles
1980 F100 Custom, 300/Np 435/2.75 geared 9"
60,000 miles
1982 F100 SWB
300 HD, 9.5:1 compression 1.94/1.60 valves
Clifford 270H, Hedman Hedder
2½" duals
NP 435/2.75 geared 9"
1985 F150 HD, 300 HD/needs a NP 435/4.10 geared 8.8
70,000 miles
1980 F100 Custom, 300/Np 435/2.75 geared 9"
60,000 miles
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