Originally Posted by KEVIN KIRELUK
^^^ that sounds more like a sequential setup which is really common on RX7s, not a compound. There is no 'switch over' point with compounds as one is feeding compressed air to the other, so they are both used at the same time.


That is correct...thanks for clearing that up. Also, i am not a turbo guru so i only judge based on my own real life experience.

Originally Posted by Mike Kuttschrutter
Compounds feel more linear once they are setup correctly.
When I had the small turbo set on stock wastegate pressure and the large turbo set around 20ish, the small one spooled instantly, then there was a bit of lag, then the larger one started screaming and kicking in, which was cool, but not ideal.


I like the idea of sequential setup so all available exhaust pressure can be used to spool-up small turbo at low rpms (at least 2000). However, the transition point (when bigger turbo takes over the small) felt like a weak spot because boost noticeably dropped in rx7. Based on your comments, the compound setup don't drop boost since both turbos are always online. However, there should be some trade off in early spool? I can't find boost in your log? TPS peaks only at 82%? you didn't gun her all the way?

300zx uses compound setup consisting of dual Garret T25s. Each per 3 cylinders on V6 3.0. Stock boost at 9.5 PSI and takes about 3000rpm to get there according to local 300zx owner.

Last edited by Alex Akachinskiy; March 09, 2015 04:06 pm UTC.
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