I was just wondering if anyone could tell me if you can increase volume of the "dumpvalve" sound?

I have changed it to sound as a wastegate, but i simply dont think its loud enough as i cant really hear the choke of the turbo when the blades stall..

Also, could someone point out what program i need to make my own sounds? Ive seen that someone has posted the program on here before, but i cant find it

Cheers

Go here: http://www.lfsforum.net/showthread.php?t=9722

The one in the 2nd post is the one i believe you're looking for.

FYI, the only noise a wastegate will ever make is a "RRRRROOOOAAAAAAAAARRRRRRRRR!!!!!!!!!!!" when the turbo has produced enough boost pressure. A wastegate is always closed while the throttle is closed.

The "chu-chu-chu-chu" noise you're talking about comes from the turbo, not the wastegate. Which you indicated knowledge of in the second part of your sentence; "the choke of the turbo when the blades stall.."

Just so you know.