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-   -   What's the Difference in STi engines? (http://www.wrxtuners.com/forums/f103/whats-difference-sti-engines-21633/)

Jonpark 12-31-2007 05:17 PM

What's the Difference in STi engines?
 
I'm trying to swap the engine w/ Sti engines.
I have 07 wrx but recently piston rings has been damaged now i need set of forged pistons or sti engine...
but i see that there are some different engines like... V5, V6, V7 sti engines
what's the difference and what are they?

IH8PVMNT 12-31-2007 05:31 PM

how'd you manage to damage the piston rings ??

Jave 12-31-2007 07:11 PM

might have been running rich like me and burned them up.

IH8PVMNT 12-31-2007 07:35 PM

would this be followed by a sudden lack of power..... i boost fine but car seems like it doesnt pull like it used to.... all i have is an spt intake

dumdum 01-01-2008 07:37 AM

[QUOTE=Jonpark;181689]I'm trying to swap the engine w/ Sti engines.
I have 07 wrx but recently piston rings has been damaged now i need set of forged pistons or sti engine...
but i see that there are some different engines like... V5, V6, V7 sti engines
what's the difference and what are they?[/QUOTE]Turbos,ECU functions,intercoolers,cams,heads..... A Google search will bring up the technical specs.

Jonpark 01-01-2008 09:35 AM

this happened right after i got my car tuned with Enginuity.
local tuner did the tuning...
right after the tuning my car was smoking already...
and then couple of days later... boom!
The car was smoking so much i couldn't see what's coming behind me...
then the tuner said i need to replace the pistons because 07 models has problems
with piston rings and it just failed working now...
i was like what da heck....it was just working fine and right after the tuning...this happens...
but what can i say... how do i check if the piston rings damaged?
because i know my car was not running rich. previously Andy from verocious moto tuning did the tune and it was running perfect.
my car has VF39 with stock injectors..

robert.lshoc 01-01-2008 09:51 AM

put it back to stock and take it to subaru. If you put it all back the way it was they might not notice it was modded if they do at least you tried.

psinuse 01-01-2008 09:54 AM

Sounds like a bad turbo to me.

Jave 01-01-2008 10:23 AM

nope rings. Lose of power and smoking very badly. I thought it was my turbo at first but pulled it and it was fine. Even sold it on Ebay.

Jonpark 01-01-2008 10:38 PM

so what was it then?
was it the piston rings?

Jave 01-02-2008 10:44 AM

a compression test will tell you exactly what it is. mine was the rings cause I held compression during a wet test.


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