How much boost are the Paxton guys running?

[LitemUp]

How much boost are you guys running with the Paxton?

The reason why I'm asking is because according to my boost gauge I'm running close to 7.5 psi, and I heard that you can't go any higher than 5.5 psi on stock internals or the engine goes boom!

 

[SrtBrad]

From what I understand you can go between 5 - 6 lbs of boost on stock internals.

 

[Dave T(BADVENM)]

My original motor was running the stock 8psi. For whatever reason it threw a rod on the dyno. My current motor is running 8psi with Diamond pistons and water/meth injection. Joe from PBJ wanted to push up the boost a bit but I was a bit nervous about the stock rods not supporting the additional boost.

 

[RedSrt007]

I ran 9 psi...

You can run 8-9 on stock internals with a SAFE tune and water / meth.

I would not run over 8 if not data logging and adjusting fuel and timing maps accordingly.

1 hit of detonation on stock pistons @ 9psi is boom.

-Red

 

[LitemUp]

When I hit the 7.5 psi my A/F meter is pegged on 10.0 (super rich). Hopefully I shouldn't have a problem. I'll be taking her back in a few weeks to get her dyno tuned.

 

[AWDisuzu]

are you guys using widebands? 10:1 a/f is actually too rich and can cause misfires, fouled plugs, and backfires!

 

[Dave T(BADVENM)]

When I hit the 7.5 psi my A/F meter is pegged on 10.0 (super rich). Hopefully I shouldn't have a problem. I'll be taking her back in a few weeks to get her dyno tuned.

When I got back home from PBJ I was also pegging my a/f around 10 above 4000 rpm or so in 3rd and 4th gear (I'm at a higher elevation then st. louis). A few calls to Joe and a few runs on the highway...adjusting some stuff in the VEC3, my a/f is better.