Since I've purchased my 1986 300zxt, I've noticed that I'm loosing boost above 6000 rpms. Actually it seems to start loosing power above 5500 rpms. Since I have some supporting modifications, and planning on one more in the near future, I would like to upgrade my turbo.

I'd like to hear what everyone, that has already upgraded to a larger turbo, thinks about thier setups. Especially on the boost indexing and drivability of the setup.

Thanks in advance,

Wink

 

are you sure your actually loosing boost?? also if you truly are loosing boost...you should probably try to find out where its going??? are you running stock psi? just curious..

 

Well, considering I'm running a JWT ecu, and able to run 7000rpms, I know I'm running past the T3's flow capabilities. It pulls like a rocket until about 5500rpms. Then it falls on it face past 6000rpms. It's set at 11-13 psi of boost.

 

it holds that though right? its not ACTUALLY loosing boost? its just runing out of top end on that tiny barbie hairdryer of a turbo...

 

From 2500 rpms to about 6000rpms, it holds like a rock at 13psi.