Crack!! (not the drug lol )

cre · 03-08-2011, 12:16 PM

Do you already know yours is bad?

As far as I recall they're no longer available new from Toyota. Used it the only option and there are a number of places you may acquire one. As I would be planning on rebuilding regardless of where it came from I'd look locally for one which I could inspect and measure myself. If you want one that's already rebuilt check the classified ads on the various Supra sites (I think someone posted here with a freshly rebuilt one recently). You could also try contacting Aaron at www.driftmotion.com to see if he has anything.

If you're planning on upgrading to forged pistons you may also use a GE block. You lose the oil squirters which are there to cool the stock cast pistons... not a big deal with forged though. You'll also need to have the block drilled for the oil return and supply for the turbo. If you go this route make sure you run a GTE oil pump and not the GE pump.

itsjustsway · 03-15-2011, 05:09 AM

So I took the block 2 a machine shop and they told me it was fine.. So I'm getting the block shaved and honed.. I want stock oversize 40 over pistons with rings.. Anyone have brand suggestions?

cre · 03-15-2011, 05:53 AM

Don't go 40 over unless you have to... on a turbo block bore it over as little as possible. That extra .15 liters (No, I didn't bother with the calculator for that number, but if you need we can) isn't going to gain you anything that's worth the extra meat between the cylinders... the 7M's cylinder walls are fairly thin as it is. I'd keep the walls meaty and add the whopping 1/2psi it'll take to make the same increase in power with a manual boost controller.

If you just want stock, Toyota or NPR are good. The NPR are available with a molybdenum coating too. Personally, at this point I'd put in something forged (never know how power hungry you'll feel in a couple months

).

03-08-2011, 12:16 PM	#1
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Do you already know yours is bad? As far as I recall they're no longer available new from Toyota. Used it the only option and there are a number of places you may acquire one. As I would be planning on rebuilding regardless of where it came from I'd look locally for one which I could inspect and measure myself. If you want one that's already rebuilt check the classified ads on the various Supra sites (I think someone posted here with a freshly rebuilt one recently). You could also try contacting Aaron at www.driftmotion.com to see if he has anything. If you're planning on upgrading to forged pistons you may also use a GE block. You lose the oil squirters which are there to cool the stock cast pistons... not a big deal with forged though. You'll also need to have the block drilled for the oil return and supply for the turbo. If you go this route make sure you run a GTE oil pump and not the GE pump. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

03-15-2011, 05:09 AM	#2
itsjustsway Stock Join Date: Jan 2011 Location: Kissimmee Florida Posts: 27	Reply So I took the block 2 a machine shop and they told me it was fine.. So I'm getting the block shaved and honed.. I want stock oversize 40 over pistons with rings.. Anyone have brand suggestions?

03-15-2011, 05:53 AM	#3
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Don't go 40 over unless you have to... on a turbo block bore it over as little as possible. That extra .15 liters (No, I didn't bother with the calculator for that number, but if you need we can) isn't going to gain you anything that's worth the extra meat between the cylinders... the 7M's cylinder walls are fairly thin as it is. I'd keep the walls meaty and add the whopping 1/2psi it'll take to make the same increase in power with a manual boost controller. If you just want stock, Toyota or NPR are good. The NPR are available with a molybdenum coating too. Personally, at this point I'd put in something forged (never know how power hungry you'll feel in a couple months ). __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar ---> Last edited by cre; 03-15-2011 at 05:56 AM.

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