Okey dokey for all you experts....

i would like some advice on turboing my 20v.

 

what would be a good compression ratio to aim for and how to achieve.

 

there is a guy in the states though with a rotex charger running stock internals. but has ported the exhaust side

and is running 15psi and has been for 9months.

i reckon that asking for trouble with such a high comression ratio.

 

i want a decent power gain in the region of 150-160kw atw.

but i don't want to lose off boost driveability.

 

cheers, Luc

Edited August 30, 200818 yr by blackrolla80

i want a decent power gain in the region of 150-160kw atw.

but i don't want to lose off boost driveability.

 

cheers, Luc

 

8.9:1 pistons out of the later model 4AGZE

 

Bluetop and red-black top 9.4:1 has been successfully done aswell.

 

with a really good tune, i have also seen a silvertop with stock internals run a TD05 successfully

i run a smallport 10.3:1 with 10psi no problems, off boost is great and it hammers when on boost.

 

98 octane and a good tune and your all good.

8.9:1 pistons out of the later model 4AGZE

 

Bluetop and red-black top 9.4:1 has been successfully done aswell.

 

with a really good tune, i have also seen a silvertop with stock internals run a TD05 successfully

...except GZE pistons are for a 4 valve head, not a 5 valve one.

sooo perhaps just run a turbs and don't change anything.

if the internals are that strong then it should be reliable.

i guess the tune is the most important

just need to keep it away from detonation.

anyone else got experience?

Low boost should be O.K. with stock internals, 98 octane and good tune, (don't forget a decent intercooler)

what is considered low boost?

10psi? power output? a ball park figure.

i got 130rwkw/173rwhp on 10psi.

16v right? should maybe get a bit more outta a 20v?

i'm not sure if the quad throttle bodies, lighter rods and extra inlet valve will make much of a difference once you go forced induction, could be wrong.

 

most of the high powered 4AGTE motors are 16v.

...except GZE pistons are for a 4 valve head, not a 5 valve one.

 

doesnt matter, has been done heaps of times, the engine just becomes an interference engine

doesnt matter, has been done heaps of times, the engine just becomes an interference engine

 

gah! you beat me...

 

Will only become a problem when you snap your cam belt :fuzz:

 

most of the high powered 4AGTE motors are 16v.

don't mistake that for most common base. can't remember where if ound it but technologically (lol sp) both the silvertop and blacktop head are better in areas of efficiency etc.

 

Ill try find it..

Edited August 31, 200818 yr by original

doesnt matter, has been done heaps of times, the engine just becomes an interference engine

...but if your going to go through the hassle of changing pistons, why the hell would you put in GZE pistons into a 20V? Surely there's a better option than that...

GZE pistons are a really good, cheap option and take a lot of boost.

GZE pistons are a really good, cheap option and take a lot of boost.

Fair enough.