: Are there certain northstar engines to stay away from?



DAG
05-05-05, 08:32 PM
I'll probably be in the market for northstar engines from time to time for use in off-road vehicles. Are there years or versions that are better than others?

TIA

Dan

davesdeville
05-05-05, 08:53 PM
Well the VIN 9 engines are usually 300hp and the VIN Y are 275. 93-95s were OBDI computer controlled, which is possible to reprogram whereas later models were OBDII which is much harder and sometimes impossible.

Just curious though, why a N*? Offroad vehicles are usually heavy and need a lot of low end torque, while the northstar makes its peak torque at 4000/4400. They're great for light things and are used in a lot of sandrails but not trucks and 4x4s.

BeelzeBob
05-05-05, 10:03 PM
A lot of rock crawlers are starting to use them also for the light weight.

BeelzeBob
05-05-05, 10:06 PM
I'll probably be in the market for northstar engines from time to time for use in off-road vehicles. Are there years or versions that are better than others?

TIA

Dan


You are probably more interested in the 93 thru 99 engines... Beginning in 2000 the engines were substantially redesigned with a roller valve train, revised heads, etc... The fuel economy improvement with the roller followers and the LEV emission requirements were the driving force for the redesign, not HP. The 93-99 engine had the flat follower cam design and are somewhat simpler and more oriented for performance modifications.