I've upgraded to Supertech valve springs and titanium retainers and APR head studs. The reason I want to up my rev limit is because I have 272's on a stock block and stock head with a GT35R. I get full spool at 4600 rpms, ( cams set at +2/+2 which helped it spool quicker ) Now I want to increase the revs so that I can be on boost longer. So how high can I set the rev? 8000? 8500? *gulp* 9000?

Thanks for the info

 

well i think 8500 will be just fine..I am assuming that people dont really rev 4g63's to high is because of the tranny..I know that the 4g63 has a better rodstroke ratio than a honda b series and I use to spin my honda to about 10,000 all the time..best thing to do is go to dyno, see where your power band starts to fall off, and determine shift point from there. My 2cents

 

I would stick with 8k.