http://groups.msn.com/ChucksRX7/1983rx7.ms...oto&PhotoID=104



Check out the link. It is of my old set up. 86 n/a motor with a T3 .82 a/r stage III wheel 60-1. Ran a best 1/4 mile time of 124mph in my 2720lb 1st gen. I do think I was at the limits of this set up. That is why I went bigger turbo. High 11 second passes with the T3 turbo showed no signs of choking at the top end. This was at 19-20psi. I have some time slips also.

chuck

What is a good boost level to run in the cars? My motor is ported and was told somewhere around 14 psi is no problem for a street ported motor. Just wondering what is safe on the engine and what other rx7 owners are usually boosting?

14 psi on what turbine? Boost pressure is relative, You still need to worry about the actual pressure but the CFM is the largest concern.



Also I dynoed 369hp at the wheels on my TD06 (t3 flange) a .95kilo of boost. The car was fast. Some manufacturers use T3 flanges and some use T4 flanges.........A/R and the size of the exhaust wheel are the major concern, not the bolt pattern

Basically. Thats why some guys can run the t3 manifold( gt35/40) and make good numbers. Its just the turbine housing and wheel is large for that footprint.