I'm sure this is a repost, but its a pretty simple question...

(1) How high can a GSR engine with ITR/CTR cams and valvetrain and PR3 pistons go?

(2) What's it take to get a GSR engine to rev to the same rate as an ITR engine?

Reliably

Thanks
Ben

 

bout8500...?
and ur ecu

 

Most folks say the ITR valve train is good to about 9k. Some even say as high as 9200, but I wouldn't trust it. If you are running ITR/CTR cams, they don't make power past 8600, so reving higher would not be very beneficial. The stock bottom end should be able to handle that just fine.

Other than that all it takes is a chipped ECU, or some other external computer to raise the rev limiter.

 

i'd say Gabe is correct those cams+ that valve train really don't make much power after 8500 so taking it any higher than 9k would be useless.