Boost Spike

[gsr sol]

ok here is the problem. the wastegate that came with my turbo kit (drag gen 3) is the Turbonetics Deltagate Mark II Wastegate. It seems to have come with a 4psi spring. I say seems because when the boost controller (greddy profec B) is turned off, 4psi is where it boost to, or where it did limit boost before my little problem. I am running low boost at 7psi and high at 11psi on a B18C1. A while back i got stupid and started messing with the balance knob on the profec b thinking it would make the turbo "spool up faster" (I know now it was a stupid thought). Well since then there has been a boost spike problem. It happens like this. I get on the gas and hit the desired boost level, lets say low boost (7psi) and it stays there. But if I take my foot off the gas, (blowoff valve blows the boost out like it should), and then get back on the gas quickly, it spikes up a few psi and stays there. Example:
hit gas, boost to desired level, let of the gas, and hit gas again, results in 3 to 4 psi spike. This also happens now if I downshift and floor it. I thought it might be the boost controller so I turned it off. Same result. Where it should stay at 4psi with the boost controller off, it spikes to 6 or 7 depending on how much I do what is described above.
I wondered if this is all caused by me messing with that balance knob on the profec b, but like I said it does it with the profec b turned off too.

Any thoughts???

[civperc]

if you're having boost spike problems, and have a Deltagate wastegate, you need to switch to a Tial. Deltagate is notorious for boost creep and spike problems.

[dptkfil]

delta wastegate suck.. just go with a tial....You are lucky that it didn't cost your engine.

[dug]

yea, just switch over to a Tial.

[flip1199]

it might not be the wastegate. I know of alot of people having boost spike with the drag mani. the wastegate placement is not the best of places

[civperc]

Originally posted by flip1199
it might not be the wastegate. I know of alot of people having boost spike with the drag mani. the wastegate placement is not the best of places

yeah the fact that it's a drag manifold only further increases the problem with the Deltagate.

[RudeLude]

Originally posted by dptkfil
delta wastegate suck.. just go with a tial....You are lucky that it didn't cost your engine.

i see that u have a water injections systme in ur setup.....does it make a noticable difference with the turbo? like what gains did u get from it?
dan