The QR25DE can be found in the Sentra SE-R, Altima, Frontier and the new X-Trail.

It has an 89mm bore and a 100mm stroke and runs a 9.5:1 compression ratio.

 

Yeah bro... you'd be stupid to try to boost high compression. Boost compression should sit around 8-8.5 to avoid detonation and run high boost.


-Tide

 

Just wanted to make sure we were on the same page.

 

8:1 CR is pretty low. unless you're running 2 bar i wouldn't go that low.
you'd be safe with 1.5 bar and 8.8:1.... without pulling timing!

 

I know of a B18b1 running 8:1 on about two bar yeah. Crazy fast though. You're right 8 is low... I'd stick with 8.5:1- 9:1 for a moderate turbo set up.

Thanks man

-Tide

 

The weight ratio for the tC would change if you made it to RWD due to the drive shaft, orinetation of the engine and transmission. I can't say what the ratio would be but it would change. Of course I mean putting in a new qr engine into the tC. and why wouldn't it be carb legal.... clarify pls

 

doing the RWD change will mean custom suspension... (if you want to do it right)