ok now that i have some great opinions on the 304.what size carb do i need for a stocker if a 600 is to big .
ok now that i have some great opinions on the 304.what size carb do i need for a stocker if a 600 is to big .
I don't think a 600 is too big. Just don't use a double-pumper, anything with vacuum secondaries will be OK. I ran a Holley 600 and Edlebrock performer manifold on a stock 304 (with headers) for several years. Got mileage comparable with the 2BBl.
Bob
tufcj
1969 AMX
1967 Rambler Rogue
If you need a tool and don't buy it...
you'll eventually pay for it...
and not have it.
Henry Ford
and what would that be? I cant seem to manage better than 8-10mpg at 60
Dang I wish my 390 got that kind of mileage, but then again at 60 I am pulling about 3300rpm.Originally Posted by ironman_gq
im about 2800 with 4.56's and 35's. Im only running a mild 304 so I figured I should be able to get 10-12 without too much trouble but I might be wrong.
Holley Truck Avenger 470 or 670cfm, they have some kind of application that helps you figure it out on their site
100%RHINOLINED,AMC360,D300,D60F&R,35"BFG MT, 6"^,Breaks down every chance it gets. My lady calls it the Death Star
http://www.cardomain.com/ride/2431277
When i did tha calculations my motor came out to need something around 540 CFMs so maybe a 500 edelbrock might not be a bad choice but i choose to go with a 570 strret avenger holley and have had no problems quite yet with my 304
1980 CJ-5, 360 powered, T-18, Dana 20, Advanced Adapters output , 4.56's, Dana 30 frt chromoly shafts w/297 joints and Tru-Trac and M20 rear with Detroit, Superior shafts, and disc brakes and Tom Woods frt and rear shafts.........about 10k in misc aftermarket parts!
I'm running a 470 Truck Avenger with my 304 and 4.10 gears and a TF 999 auto and 35 bfg's and it runs around 2800 rpm at 60 mph .I.m getting 10 to 12 mpg. By keeping the speed down to say 55 it gets a little better. But we all are driving Jeeps and they aren't very aerodynamic.
Heres a formula to help determine how much carb to get:
CFM = max rpm x displacement in cubic inches x .80 divided by 3'456.
Say you have a 304 you want to be able to rev to 5000 rpm that formula would give you 350 CFM. Most Jeep motors rarely see 500 rpms except for nice long uphills, in the rocks mine never gets higher than 1000 rpm. I got this info out of a book called Jeep 4x4 performance handbook by Jim Allan.
84 CJ 7 304, Arb rear, 35 BFG,s with a 2 1/2 spring lift only and to many other mods to list, plus a offroad trailer also on 35 BFG,s
I was getting 14 to 18 MPG with a Stocker 304 with Performer Intake/Performer 1406 Carb.
-Dave
2005 Dodge Neon SRT4 W/Injen SRI, Prothane Race Inserts, Autometer 30/30 Boost Gauge, & AGP Wastegate She's pushin' 19lbs of Boost.
1976 CJ7/304 W/Edelbrock intake & 600CFM Carb/Q-Track (Part Time Conversion)/TH400/Painless Wiring Harness/HEI Dist.
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