Well. I just got a new DP cause my PreCat probobly was bad, I then had big boostspikes at first turbo and 6psi of boost at high rpm.
Now it goes much better, it still spikes the boost when pushing throttle fast so I have to go easy on the throttle, How can I get those spikes to disapear?

Second thing is that I sometimes have a nice 10 PSI on second turbo, but sometimes it just gives me a poor 4-5 psi. What can that be?

Thanks.

 

anyone? please!

 

Go to and read:

http://home.istar.ca/~dvandit/

 

gzon- Didn't you fix this? Wasn't it a popped off hose to the pressure tank?

 

one fault was the popped of hose at the tank. I have also made a DP, a CB, intake mods and the pettit ecu.

Then I have changed the pills so now I use 12 psi at primary and 10 psi at secondary with no boostspikes at all. I am very satisfied with my car and it goes vey well.

Yesterday I raced a RX-7 that was mapped on the dyno with so called "unichip" boxes that work together with the stock ECU, it boosted 15psi@285Hp and I beat him quite easy on the straight of the track.

So I have really understood the meaning of tuning the rx-7, tune it properly at intake and exhaust before turning up the boost. I am a fan of reliable turbocars with modern boostpressure, sure High boost is fun but I dont want to use it on my car on the street.