800+rwhp 13B PP

[RICE RACING]

Originally Posted by forcefed7

Hi Ted,
The wastegate is a Precision 66mm. When I first started the tuning I had softer springs in it, and it was capable keeping the boost as low as 8psi.

The intake manifold and throttle body is from Xtreme Rotary. The throttle body has four throttle plates, with the primary plates work off of a progressive linkage design. Drivablity is excellent. I did have to make some changes to it, but overall great product.

On these similar 1000bhp 13B set up's I run twin 44mm waste gates to get over the problem you are facing now. Minimum spring pressure you can get away with on 350kpa abs and above is 1.4bar.

Single large WG will never work correctly with a "lower" base spring as you are finding out.