How are you only seeing 10-11 psi on a 3.2" pulley? Isn't this about 5-6psi short on a VT kit with the supplied larger 6" size crank pulley?

 

Honestly.... I have no idea. We checked for boost leaks everywhere, only found one on my original tuning day and we fixed that. It's 100% a 3.2" pulley though, and the belt is not slipping at all from what we can tell. It's a standard V2 SCi kit for 04-05 that I retrofitted onto my 07 (basically deleted the FMU).

I'm after more boost without going overboard, but I also want to go air/air intercooler. I figured with the pressure drop that I've heard goes with going air/air, this SC might be a good trade out to help me get where I want to be.

 

If I recall correctly, the SCi has the same internals and compressor map as the N1220. If that’s the case, then his boost level is inline.

 

Its the crank pulley diameter difference in this case, not the blower. The VT kit has a larger pulley. 6" vs 5.45".

 

I get that. He’s at 55k-ish blower rpms at peak. With a Si/N1200, the boost level would be higher. I had the n1220 and n1200 in my previous setups.

 

Hmmm When I ran the Novi1000/1220 - same) and a NV1200 with the 3.2" I made 14psi at 9k with the NV1000 and 17psi with the 1200 in the summer on a low 9.6:1 comp engine, and saw 2 psi higher then that in winter temps. That's on a smaller 5.45 crank pulley as well. It should be a good 3-4psi higher with the 6" vortech crank pulley. 10psi with a 3.2 at 8k isn't consistent with my experience and from what ive seen other post over the years. Hell I made that with a 3.6" so i dont know.

 

Oh, I saw Intercooler and thought pressure loss. I need to read the post fully. I found this

https://www.s2ki.com/forums/s2000-fo...o-tune-734359/

 

Fmic would be the easy explanation, but no, he is running standard air/water.

 

Yeah I'm air/water now, but I'd kinda like to run air/air. I feel like I experience a fair amount of heat soak with the air/water setup now in high summer. I'd really like to run ~14-15psi though with an air/air setup.

Which was why I was asking if this supercharger would make sense as an upgrade.

 

You think you have boost loss now lol I think a water/meth injection kit would be a lot less expensive. get the most out of what you have now for a few hundred. If that still doesn't suffice, then explore this avenue.