Straight 6 vs V6
01-24-2009, 10:57 PM
#16
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Year: 1998
Model: Cherokee
Engine: 4.0l
Chrysler 225 slant sixes, could not kill these engines. best v6, it's all in ones opinion, but GM's 3.8L is pretty darn good, design goes back to the sixties and then even added a supercharger on some models. 3.8L with the 4 speed auto, i've dealt with people getting 35mpg and better on the highway and well into 300,000kms. olny reason they don't make them anymore was they could not "clean up" the emssions any further. problem was and still is, exhaust gases left near the outside edge of the pistion area, near the top rings. lots of torque,good horsepower, good MPG
01-24-2009, 10:59 PM
#18
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Year: 1993
Model: Cherokee
Engine: 4.0L
Chrysler 225 slant sixes, could not kill these engines. best v6, it's all in ones opinion, but GM's 3.8L is pretty darn good, design goes back to the sixties and then even added a supercharger on some models. 3.8L with the 4 speed auto, i've dealt with people getting 35mpg and better on the highway and well into 300,000kms. olny reason they don't make them anymore was they could not "clean up" the emssions any further. problem was and still is, exhaust gases left near the outside edge of the pistion area, near the top rings. lots of torque,good horsepower, good MPG
01-24-2009, 11:01 PM
#20
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Year: 1993
Model: Cherokee
Engine: 4.0L
Dito
Longer life could be from the fact that the L6 turns less RPM's than what a V engine would. This could probably play a factor.
I also think that the L6 has less piston crown & skirt wear, due to the fact that it runs vertical in the cylinder wall, as opposed to a V engine, where the bottom half of the cylinder wall would see more wear- and overtime perhaps an out-of-round condition could occur- resulting in poor ring performance. Could be wrong.
I've had similar discussions with diesel mechanics- they say that the L6 lasts longer as opposed to a V engine because of less vibration. With regards to diesels, I don't see how they draw that conclusion. My 7.3 IDI is a 444 CU IN V8, and has nearly no vibration compared to a 6BT Cummins of the same year.
In discussion of V's to L's on diesels- a diesel is a slow lugging motor, and so is a straight 6. A V8 is a high revving motor, where as a diesel isn't. To me, a V8 diesel makes no sense at all. It's an oxymoron. My truck has no power down low, it has to wait on boost pressure, which only comes about as a result of higher RPM. It's got power on the hwy, but around town, a L6 Cummins would be the better bet.
Longer life could be from the fact that the L6 turns less RPM's than what a V engine would. This could probably play a factor.
I also think that the L6 has less piston crown & skirt wear, due to the fact that it runs vertical in the cylinder wall, as opposed to a V engine, where the bottom half of the cylinder wall would see more wear- and overtime perhaps an out-of-round condition could occur- resulting in poor ring performance. Could be wrong.
I've had similar discussions with diesel mechanics- they say that the L6 lasts longer as opposed to a V engine because of less vibration. With regards to diesels, I don't see how they draw that conclusion. My 7.3 IDI is a 444 CU IN V8, and has nearly no vibration compared to a 6BT Cummins of the same year.
In discussion of V's to L's on diesels- a diesel is a slow lugging motor, and so is a straight 6. A V8 is a high revving motor, where as a diesel isn't. To me, a V8 diesel makes no sense at all. It's an oxymoron. My truck has no power down low, it has to wait on boost pressure, which only comes about as a result of higher RPM. It's got power on the hwy, but around town, a L6 Cummins would be the better bet.
01-24-2009, 11:02 PM
#21
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Year: 1990
Model: Cherokee
Engine: 4.0 lt. 242 cu.in.
Dito
I've had similar discussions with diesel mechanics- they say that the L6 lasts longer as opposed to a V engine because of less vibration. With regards to diesels, I don't see how they draw that conclusion. My 7.3 IDI is a 444 CU IN V8, and has nearly no vibration compared to a 6BT Cummins of the same year.
I've had similar discussions with diesel mechanics- they say that the L6 lasts longer as opposed to a V engine because of less vibration. With regards to diesels, I don't see how they draw that conclusion. My 7.3 IDI is a 444 CU IN V8, and has nearly no vibration compared to a 6BT Cummins of the same year.
this is because cummins have more power.
01-24-2009, 11:02 PM
#22
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Year: 1998
Model: Cherokee
Engine: 4.0l
see above....2.8L GM is terrible....how could GM produce a killer small block and yet a boat anchor..what gives? inline sixes, again, Chevy's 250 was pretty damm good. run forever
01-24-2009, 11:07 PM
#24
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Year: 1993
Model: Cherokee
Engine: 4.0L
The chevy 250 is the worst I6 I have seen. buddy had one with less than a 100,000 before he had to get it rebuilt for spinnning a beaaring. 2.8L have most of there trouble with the rear mains if GM could have figured out how to fix that they would have been a heck of alot better.