Are you on a journal bearing or ball bearing turbo?
And if ball bearing is it water or air cooled?

 

Journal bearing and billet.

 

.065 restrictor sounds perfect.
I wouldn't drive it more till u get it in.

 

Okay, thanks man.

It kinda annoys me that the kit didn't come with one now. At least it wasn't an expensive part and will be easy to throw on.

 

Yeah one didn't come with my Inline kit either and I didn't know I needed one till I bought a new turbo and put it in my car...

 

Well, I ended up making 579.9whp@9050rpm and 356wtq@8350rpm. Mase detuned it to 549whp to make it more conservative and safe. This was on 20psi IIRC. On my 91 tune, I wanted just the 12psi wastegate pressure and that ended up putting down 395whp.

 

I keep looking at the graph and keep thinking. I have never seen a 9050rpm peak power graph for an s2000 before. On stock cams even too. It looks like it has more in it up top before falling down IMO. In my "build," I tried to keep the backpressure ratio as small as possible and knew I would have to rev it up a bunch, but didn't expect it to affect it like that making peak power very high.

Is it unrealistic to build the head and rev the stock bottom end out to about 9600ish? At about 9700 on an AP1, the piston speed is equivalent to an AP2 revving to 9000rpms. I know people rev AP2s to 9k with no issues that I've seen. The rod/stroke ratio with the AP1 is 1.82 which is a good ratio for revving decently high.

Thoughts?

 

I rev mine out to 9450 with my Supertech built head but we dont know where the power falls off at. When we had it on the dyno, my tuner/friend kept shutting it down at around 9000 rpm. The next time we dyno mine, we will be taking it up to 9450 and see if it falls off or not. I spoke to Ya a while back and asked him if he thought the stock bottom end would be fine reving out to 9500 rpm and he said it would be fine. I mainly had my rev limiter set at 9450 because I wanted more speed out of 4th gear. I think it tops out in 4th gear at ~126 mph at 9450 instead of ~118 mph at 9000 rpm.

 

Hmmmm. I may just build the head for now and drive it till it dies/blows rather than building my other block over winter.

With E85, the car just runs amazing and the stock CR is near perfect for it IMO. I could swap to my ARP head studs and call it good with a built head with more boost and higher rev limit.


Yeah, 4th gear in boost is an amazing feeling.

 

Congrat man.