I may be wrong, but it's my understanding that the stock turbo piston was a hypereutectic alloy. Most of the aftermarket replacements such as the Sealed Power/ Speed-Pro, and others are hypereutectic as well. The pistons in that link are advertised only as being cast, so there's a good chance they are actually a downgrade from stock.
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Because One broken Stealth just wasn't enough... I made twins..
I may be wrong, but it's my understanding that the stock turbo piston was a hypereutectic alloy. Most of the aftermarket replacements such as the Sealed Power/ Speed-Pro, and others are hypereutectic as well. The pistons in that link are advertised only as being cast, so there's a good chance they are actually a downgrade from stock.
Yes, the stockers are hypereutectic.
-Chris
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AEM Factory Trained Tuner
91VR4-3.0L-Stock heads and Cams-770AWHP 747AWTQ 30psi E100 Daily Driver 10.57@136mph
SLTT-10.9 @ 140MPH Stock NA motor and NA heads/Cams
T4 AWD 9.21 @ 154.98
T2 FWD 10.19 @ 140.31
T4-159.23 MPH Ran on 6G72 3.1L!
T4-995AWHP Uncorrected 6G72 3.0L C16
T2-820FWHP 3.1L 27psi C16
re read import power. do exactly what he says ! most gaskets are one time use, i would never re use a gasket. and yes, clean until you take a white cloth and rub it and it is still white, then you know your safe !!
Bump Does anyone have a link for that OEM gasket set for $320? Also does it include all gaskets from Oil pan up? If so $320 is a pretty good deal on a true full gasket Kit.
Also does anyone know if the pistons used By Pricedmatchedparts on their stage 1 rebuild are any good?
becasue they have pretty good deals on rebuilt Short blocks.
Last edited by aapstealth : 11-06-2009 at 03:46 PM.
Reason: More info
Why are you rebuilding? Just to rebuild? Or did something break?
Just rebuilding to rebuild, 170,000 on the clock. I figure since im planning on keeping the car for a great while and want to eventually hit the 500hp mark it would be better to use the money and rebuild the engine rather than start slapping turbos on and possibly have to do a forced rebuild.
Oh, I did a quick compression check a few days back, Only did the front 3 cylinders cuz i didnt have a whole lot of time. My results were:
Thats after 6 strokes.....The specs I found were 115psi.
I then did a running compression check. As i recall you are suppose to get %50 of whatever you got for the dry check at idle and around %80 at snap throttle, Thats on NA cars anyways. I was getting about 25psi at idle and maybe 40psi at snap. Is it diffferent for turboed cars cuz of all the stuff in between the intake and the throttle body (turbos, intercooler, etc)?? Or is the engine just not breathing very good?
If you plan on going for 500hp, get forged pistons now. You'll thank yourself later when you dont have to pull the engine apart again to replace a cracked piston.
Just rebuilding to rebuild, 170,000 on the clock. I figure since im planning on keeping the car for a great while and want to eventually hit the 500hp mark it would be better to use the money and rebuild the engine rather than start slapping turbos on and possibly have to do a forced rebuild.
Oh, I did a quick compression check a few days back, Only did the front 3 cylinders cuz i didnt have a whole lot of time. My results were:
Thats after 6 strokes.....The specs I found were 115psi.
I then did a running compression check. As i recall you are suppose to get %50 of whatever you got for the dry check at idle and around %80 at snap throttle, Thats on NA cars anyways. I was getting about 25psi at idle and maybe 40psi at snap. Is it diffferent for turboed cars cuz of all the stuff in between the intake and the throttle body (turbos, intercooler, etc)?? Or is the engine just not breathing very good?
That is not spec, that is the service limit and the sign of a VERY worn engine. A TT should compression at 145-165psi
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Re: Rebuild ?'s, Gasket set, pistons choices.
I made twins..
