Originally Posted by neverstop

awesome info man, thanks. This stuff is encouraging. I don't want to stick with gsr cams but from what I'd seen it was the easiest way to achieve my mpg goals and since my whp goals are not.

was that 13.6 on street tires? I'm assuming that is in a relatively stripped eg hatch?

I'll have to throw in a thicker gasket and some other tricks to bring that compression down a touch for sure. We'll see what it ends up exactly once I cc the heads but its certainly on the limit for pump gas.

Originally Posted by careawholelot

my buddy made 215 whp on stock gsr cams, the motor is fully built, the cams are the only thing he never upgraded, and its on 91 octane

Originally Posted by neverstop

i'm looking to put out 200whp with a built b20 on gsr cams. The goal is to go 13s on street tires (maybe nt555r) with an LS transmission in an eg hatch and get 40mpg or better on the freeway. I know cams would get me the power but they impact mpg pretty seriously. I already have race cars, i just want to talk smack to prius owners while stomping on the occasional 5.0 mustang with a fun, torquey, efficient commute car.

I currently have a 177whp ls vtec with gsr cams that is probably ~14.2 second car and best so far is ~38mpg but it has much more I could do to it (alignment, better tune, etc). Problem is that the rings are going out and so I have this built b20 sitting here with DNR ported head, je pistons12:1, eagle rods, etc.

The way I see it:

take the ~175whp my ls vtec puts out, add 9% more displacement for 9% more power, that gets 190whp, then add the ported head on a bigger bore motor, add an electronic cutout, ported p30 intake manifold, better bosch FIC 550cc fuel injectors, new rings, higher compression and a better tune plus port match everything and 200whp seems reachable?

has anyone put down 200whp with any setup on gsr cams?