Non_Turbo vs Turbo Engine Head

[Nick M]

If you look at the Jeff Lange spec sheet in the refrence section, the 91 repair manual shows 171 psi cylinder pressure, from the original 156, and 140ish or whatever the GTE is. That is where the spool and short term power gain is. That elevated cylinder pressure. But with less lift, you will lose out in the end. And with an 86.5-88 GE used cam, there probably is not any gain.

 

[boost fiend]

so, ok. the ge and gte heads are the same. sorry if im beating a dead horse.

and iirc, its the exaust cam thats diffrent from the ge and gte.

 

[JustAnotherVictim]

Intake is different.

 

[Superjustin13]

Intake is different.

negative


it is the exhaust side.

 

[Nick M]

negative


it is the exhaust side.

I hope you aren't saying the exhaust cam. Becuase the they are the same part numbers.

 

[JustAnotherVictim]

^ Yep, the intake cams are different, not the exhaust cams.

 

[89mkthree]

its the intake. it is proven, do a little searching on it and youll find a link to supraforums hat has dyno charts for proof. i heard its different 88+ not 89+, but that one im not sure about.

 

[Nick M]

its the intake. it is proven, do a little searching on it and youll find a link to supraforums hat has dyno charts for proof. i heard its different 88+ not 89+, but that one im not sure about.

I don't know what year the intake cam switched either. The repair manual should have that information in the commpression test section.

 

[89mkthree]

i really hope its 88+ cuz mines an 88...

 

[89mkthree]

wait, no mines an 89, so im good either way