Wastegate spring
#1
Thread Starter
Wastegate spring
Last year I was running a 8 or 9 psi spring, with a TurboXS two stage manual boostcontroller. Low boost setting at about 10psi and high boost at 13psi. As some may know I bulit a new engine this winter, going from stock compression to around 9,2:1. I therefor expect to need to increase the low boost to get the same numbers, and of course go even higher in high boost setting (but I don't know how high yet). Will I be fine with the same wastegate spring, or do I need to change it to a stiffer one? I would really hate to change it as it's a pita, but IF I need to, this is the time to do it... The boost controller is a TurboXS high performance dual stage boost controller if that has anything to say.
Any input?
Any input?
#2
Registered User
Join Date: May 2012
Location: CDA, ID
Posts: 212
Likes: 0
Received 0 Likes
on
0 Posts
how much boost do you want to run. Id get a spring for what the MIN boost you wanna run then use the controller to go up from there. Ive seen 20+ out of a 8-10psi base spring with no issue before though
#3
From what I was told by my tuner. Good rule of the with a spring is you can run roughly twice the amount of boost the spring is. So for a 8lb spring roughly 16-18psi max. Now if you want to run more and keep a smaller spring run a 4 port solenoid so the top and the bottom of the wastegate are controlled seperately and not Tee'd.
#4
Registered User
Join Date: Aug 2009
Location: Richmond, VA
Posts: 876
Likes: 0
Received 0 Likes
on
0 Posts
It is a general rule of thumb that you may be limited by double the spring rate, but I have often seen some make more than double. It is dependant on exhaust pressure. The higher your EMAP the less you will get out of the spring.
#5
Thread Starter
Hmm. Well, the problem is I don't know how much boost I'm going to run yet. But I know it will be more... So maybe I'll change it to a slightly stiffer spring if I have the time. I'll see what I manage to squeeze in with the time I have!
Thread
Thread Starter
Forum
Replies
Last Post