So, I've been kicking around the idea of building a QR powerplant for a N/A project. The cylinder head flows excellent on the QR.. and the valvetrain is setup to rev. It uses cam on bucket.. instead of the rocker arm setup the SR has. However, the piss-poor rod/stroke ratio won't let it rev in factory trim. The piston speeds get pretty outrageous at about 6800rpm. There is a destroked version of this motor.. the QR20DE in Japan.. which uses a MUCH shorter stroke. This motor should rev... but it's only a 2 liter. I want to build a big displacement, high(er) revving, street motor that can make at least 250-260whp. Here's what I had in mind..
QR25DE block
Custom 93mm(bore) x 95mm(stroke) billet crankshaft (stock is 89mm x 100.8mm)
Custom billet rods (Pauter or Crower)
Custom forged pistons (10.5:1 C/R)
Sleeved block (necessary for 92mm bore)
Fully ported head with oversize valves (Polk Performance)
Custom camshafts (JWT of course)
JWT springs
Custom Intake manifold (Polk Performance)
AEBS header (bigger primaries)
This should yield a 2.6 (just shy of 2.6) liter motor, that can rev to around 8000-8200rpm. Should make at least 250-260whp. Plus, you can throw nitrous at it if you want more.
Travis
QR25DE block
Custom 93mm(bore) x 95mm(stroke) billet crankshaft (stock is 89mm x 100.8mm)
Custom billet rods (Pauter or Crower)
Custom forged pistons (10.5:1 C/R)
Sleeved block (necessary for 92mm bore)
Fully ported head with oversize valves (Polk Performance)
Custom camshafts (JWT of course)
JWT springs
Custom Intake manifold (Polk Performance)
AEBS header (bigger primaries)
This should yield a 2.6 (just shy of 2.6) liter motor, that can rev to around 8000-8200rpm. Should make at least 250-260whp. Plus, you can throw nitrous at it if you want more.
Travis