v8 cruise rpm, whats tooo much?
the deal is possible sb chev swap. problem 4.10 gears, 31" tires 4spd. this puts 55mph at about 2700rpm. 55 is probably as fast as it will b used for any distance, but 2700 seems alot. whatda ya think?
Jeep. There's Only One
2700rpm seams a little high to me especially when my 02 Ford F150 cruises @ 70mph while only doing 2000rpm and the tires are right around 32" diameter w/3.55 gears.
1984 CJ-7 Renegade
As long as it's a good motor and you don't care about fuel consumption, have no fear. I run mine with 5.38 gears on 33 inch tires. Around 3000rpm at 55mph according to GPS. I've driven it to cruisin' the coast twice, 240 miles round trip. Only problem was stopping every 80 miles to fill up.I drove my 70 Ford 302 at 70mph (also 3000rpm) to North Carolina (800+ one way) with no problems.
1958 Willys CJ5 on a 71 Jeep CJ5 chassis, 231 Buick, Dana 30 front, Dana 44 rear, lockers, 5.38 on 33" tires.
I assume the 4spd is the SM465? You could always add something like this to get an OD...
1985 CJ7 Project
Phase One : 5.3L Vortec/4L60E, Moser axles for AMC20, Twin Stick'd Dana300 - Completed
Phase Two: Bedliner, Rollcage, Seats, BESRK Rear Bumper w/ tire swing, Soft Top, and a few other goodies - Mostly Complete
Phase Three: Waggy 44 front, Scout D44 Rear, 4.56's, ARB's (F/R) SOA with YJ Springs, 35x12.50x15 BFG MT - Not Even Close to beginning
Also a mostly rust-free 1970 Scout 800A That I'll get to start working on someday...
If your using a non OD trans its gonna be a 1 to 1 ratio. Consider many 3/4 to 1 ton pickups came with 4.10 gears and pretty close to 31`s putting them where your at. Our 84 haywagon has 155K on the original everything with this setup.
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