Building a GSR motor and thinking about trying out some of those RS machine 82mm CTR pistons. I will be running a ITR head milled .030". Using RM cams havent decided from M22 or M24.

But my main concern is that the sleeves will be able to hadle 9000 RPM's at 82mm bore.

 

I wouldnt.. those cylinder walls are gettin pretty thin..

 

sleeve it

 

82mm should be fine. Don't quote me on that, as there are more knowledgable folks in here.

But from your specs, do you know how high the c/r will be? 13xx:1 if I'm not mistaken. Is this a DD?

 

according to a couple of Sites Compression is around 13.2:1.

Car will be weekend warrior and fun little cruise car. will be tuned on 110 Leaded

 

nothings safe !

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RED_90TEG &raquo;</TD></TR><TR><TD CLASS="quote">nothings safe !</TD></TR></TABLE>

thank you for contributing nothing to this thread. I dont wanna know hear say or i think.. just looking for facts.

 

I see no problem with the 82mm bore but the piston choice is a poor one. The high dome does not allow good burnand your compression ratio is going to be in the 14.4:1 area. Stock sleeves its good to keep under 12.5:1. Change to .025"milling the usdm ITR pistons and for 11.8:1 c/r or the pr3's for 12.1:1 c/r

 

wow ya definately got some bad C/R site cause it said that the CR would be around 13.2:1 i could live with that.

Pr3's sound like what im lookin for then

 

i am running a 82mm B18C1 have about 7500km's on it and has seen 9000rpm a few times

 

At 82mm you'll be fine.....as long as you have a decent tune. .5mm off either side isnt much. Take it to 84mm and "your sleeves are getting pretty thin."

 

Subscribed, interested in more input for 82mm as well.. safe for daily driving..?

 

82MM is the limit, Its perfectly fine...ran 82MM to 9500 rpm's 11.5:1 compression with no problems..in my daily..