spool rate of the SR stage 2 turbo...
 

What is the spool rate like for the SR stage 2 turbo compared to other turbo setups? How streetable is it? Maybe even Ernie can chime in?:D

I can't help you out too much (no numbers) but I do know the stage 3 is similar to a T78 in terms of power output and size, but spools up a little bit faster.

Therefore, the stage 2 turbo should be even quicker spooling.

I got 15 psi boost by about 4200-4400 rpm with SR Stage II Turbo and SR ported housings for my motor. In fourth gear it would make 10 psi by 3600rpm or so.

Forgot to mention ... the exhaust housing and turbine on the Stage 2 is huge.

There isn't a stage 3. Ray makes it in a stage 1,2,5 and 6.....Don't know why he skipped a few numbers...lol
I made 372rwhp @ 10psi.... I can't tell ya what I made at 20psi on a stock motor....I'd have to kill ya...;)
It spools faster than average. I hit 15psi at about 3900-4000 with a 1bar wastegate spring. This summer I'll run 28lbs and see how she does on a ported motor.

That is the K28 turbo right? Wasn't there something going around about how SR was using holset housings and KKK compressors/turbines? Is there any other source for KKK turbos? Lately I've been realizing more and more just how many largely unknown (at least to me) options there are for RX-7 owners that are looking in the 450-550 rwhp range w/ relatively quick response. Sorry sometimes I ramble.

No, its not the K28. The KKK that Ray sells, he does fab up with a holset compressor so no you wouldn't be able to buy his exact turbo from another source.

I must have been thinking of Stage II comparable to a T78 then, not the 'stage III' turbo.
Thanks for the correction.

hmmm as far as comparability, its quite large as i remember, but i know if u check out the sr site, they mad around 550 whp at 19 psi, but its water injected for all u that think its a horrible thing to do to ur 7, newayz check it out, its got a dyno for it, and a list of mods, sounds like a good turbo to me. its bigger than mine so :(

Re: spool rate of the SR stage 2 turbo...
 

your best bet is to contact www.srx7.com directly