How great of an improvement is the 99 spec twin turbo system compared to the stock one? How much increase in boost and hp does it get?
How does it compare to other turbo upgrades like the m2 ball bearings or single turbo set ups?

 

I'll talk to my mech. I know he installed these in someone's car very recently..He should have somekind of ideal

 

This article should answer all your questions:
http://www.rx7turboturbo.com/robrobi...ae_article.htm

I have them and I think the major difference is in how quick they spool up, not in the ultimate numbers they produce. If you are looking for big power, go single.

Let me know if you have more specific questions.

Best regards,
Scott

 

Link doesnt work

 

inb4 holy thread revival

 

Funny as just today I was speaking to my "friend" about this, and he said to expect about 320-330 whp. And said exactly what Scott said, better spool up due to very tight tolerances, but close to the same top end power.

I just ordered a set...

 

Go with BNR's instead...

 

I should have. I'm used to the lag of a GT3574 on my R1, and I figured I wanted no lag for my street duty R2. I'm guessing the BNR's lag ain't all that bad.