V8 engines??
shaunfg
Jeeper
I'm fairly new to the Jeep world. I have a 79 CJ7 . .AMC 258 i6 / 4.2l with a T-150 . My question is what V8's will work with that Transmission ??
I'm fairly new to the Jeep world. I have a 79 CJ7 . .AMC 258 i6 / 4.2l with a T-150 . My question is what V8's will work with that Transmission ??
I'm fairly new to the Jeep world. I have a 79 CJ7 . .AMC 258 i6 / 4.2l with a T-150 . My question is what V8's will work with that Transmission ??
How do you like your mods on your AMC 258 i6 / 4.2l with 4.0 head and all. I have a AMC 258 i6 / 4.2l in my jeep now and trying to decide between a AMC 304 build that I have in the barn, or stroking my AMC 258 i6 / 4.2l .my question is why?
How do you like your mods on your AMC 258 i6 / 4.2l with 4.0 head and all. I have a AMC 258 i6 / 4.2l in my jeep now and trying to decide between a AMC 304 build that I have in the barn, or stroking my AMC 258 i6 / 4.2l .
If you modify the V8 and choose a cam to optimize low RPM torque instead of high rpm horsepower you avoid the mistake that started this paragraph.
Not to high jack this thread Incommando and others, I have a thead titled differance between AMC 258 i6 / 4.2l and AMC 304 if you would like to discuse gearing in my jeep. Unless the original poster would be intersted in this discussion also?Installing the classic "rv" cams generally requires no valvetrain mods. Obviously upgrading stock components to aftermarket may optimize performance but that is true with the stock cam, too. The higher lift coupled with the extended duration of the higher rpm cams are generally what leads to the binding an misalignment issues in the valvetrain.
Modifying jeeps, like any vehicle, is a series of compromises. Being realistic about the actual use of your jeep ( only driven to the trails? 90% highway?) will help in the decision. But I'll bet that the axle gears will play a greater role in highway performance than the cam. Although I obviously haven't seen them all I am unaware of an AMC V8 RV cam that won't still allow you more RPM's than the realistic upper end of a stock AMC 258 i6 / 4.2l .
Installing the classic "rv" cams generally requires no valvetrain mods. Obviously upgrading stock components to aftermarket may optimize performance but that is true with the stock cam, too. The higher lift coupled with the extended duration of the higher rpm cams are generally what leads to the binding an misalignment issues in the valvetrain.
Modifying jeeps, like any vehicle, is a series of compromises. Being realistic about the actual use of your jeep ( only driven to the trails? 90% highway?) will help in the decision. But I'll bet that the axle gears will play a greater role in highway performance than the cam. Although I obviously haven't seen them all I am unaware of an AMC V8 RV cam that won't still allow you more RPM's than the realistic upper end of a stock AMC 258 i6 / 4.2l .
I am unfamiliar with the CJ's I4 engines so if you are asking about a cam change for you factory '84 ihave no info to offer.
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