SC51

iTrader: (3)

Been having this issue after I put the slightly smaller turbo on, I like it, spools so fast that I think the WG can't dump enough air? Manuals shifting the car it holds boost at 10 where I set it for couple seconds but as the RPM's get higher the boost climbs as well. And putting it straight to the floor in auto mode the car screams and blasts up to like 15 so I just let off. Not fun. Only solutions I can see is bigger waste gate any suggestions?

Specs:
Stock motor/ head gasket
T70 turbo w 68a/r exhaust
44mm WG
Halmen MBC

Ali SC3

iTrader: (10)

is this with the manual boost controller?

StiCk3

iTrader: (5)

Halmen MBC (manual boost controller). That's probably the source of your problem right there. What's the wastegate spring rated for?

SC51

iTrader: (3)

Ya I am running a boost controller to prevent the WG from opening so fast. The Spring is rated for 8lbs or so.

madmax98

Did you try adjusting the controller to yield less boost?

SC51

iTrader: (3)

Yes I have tried adjusting it. Mabe my WG is not good enough for running just 10lbs.

madmax98

What happens when you adjust it?

Ali SC3

iTrader: (10)

try removing the boost controller and see if it holds off the spring.
if so then its the boost controller, if not its the gate.

SC51

iTrader: (3)

Ya ive tried disconnecting it and cars way slower wastegate opens instantly and the boost still creeps up quick, so quick that ive spike to 15-16psi range the other night now im seeing white smoke after it comes down from a rev, it idles a little different but it spools way smoother. I take it i blew the head gasket a bit

SC51

iTrader: (3)

**update** The smoke is bluish too, also when I start my car up it'll turn over and make like a skip sound then start like the ignition skips once then starts

S142jz

iTrader: (2)

Blue smoke could be too much fuel or antifreeze.

Do u know what ur afr's are on and off boost ??

Ali SC3

iTrader: (10)

does it feel like the starter is kicking back (it should sound a little violent if it is). usually a sign that the ignition is too advanced. what kind of management are you running? have you messed with the distributor lately and did you remember to reset the base timing after?

cartmill

iTrader: (3)

need more details of setup

99SC42

iTrader: (44)

Ali he has a GE VVTi dosn't have a distributor.
What Brand WG are you running?
What kind of Vaccum line are you using on the WG?

Ali SC3

iTrader: (10)

oh forgot he has vvti, if your turbo is spooling real hard you may need a bigger/better wastegate. I have no problems holding 9 psi with my xspower t61, I only have a 40mm hks style gate but it dumps pretty loud though.
Its not too efficient to run big turbos at low boost, you may want to consider a TT headgasket and running more boost or If you are running stock compression for a long time using a smaller turbo which will spool quicker.