<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ltho1998 &raquo;</TD></TR><TR><TD CLASS="quote">Boost spike problems usually arise from crappy rubber hose being used on the wastegate actuator.

Options to consider is steel braided line.

Now, you said you're boost spiking.. does it eventually go back down to .6 bar? or does it keep going up the longer you're accelerating. If so that's boost creep and that's probably due to too much exhaust flow through the turbine and not enough out the wastegate.</TD></TR></TABLE>

I am using a rubber vacuum hose for the wastegate, but its a better quality hose.
Would that matter???

The creep keeps going. ****, last night it spiked to 20lbs!!. I think it mite be too much flow. When I put the exhaust on and the dump tube it slowed the creep down, but it still does the 4-6psi creep. Since the head is ported and the manifold flows so well, I'm starting to think that the wastegate cant keep up. BUT, I've seen people with ported heads and good manifolds not have a problem with boost creep with a 40mm. Everyone I've talked to about it says this is a very weird problem... Thanks for ur input also

 

So wait, you are running a straight T3? You shouldn't need a larger wastegate, if anything it seems to me like you would be better off with the 38mm. Maybe I am wrong.