Rasta

I am having a little trouble with the boost on my car creeping up in 3rd gear it got real high at one point almost 13psi and almost KAPOW!! (stock computer). I cut the softest spring that comes with the waste gate and it boost around 7psi which is what I want for now, but then it creeps in 3rd. Anyone else ever have any problems..I have a turbonetics evolution waste gate and I am going to change it to a TIAL 38mm to see it will make any difference. I wonder if it is because I have the waste gate plumbed back into the downpipe?

paul_dezod

The evolution and deltagate gates are notorious for creep from past experience.

Rasta

What r u running

paul_dezod

We run TiAL and only TiAL because of the consistency.

http://dezod.com/pd_tial.cfm

Rasta

Thanks man I am going to try that out this weekend

MIAPLAYA

I hope you mean the Deltagate only. Everyone I know who has had boost creep issues with the Deltagate switched to a Evolution and it was gone. Anyone else who had boost creep issues remain didn't have a good position plan for the wastegate and any gate would have creeped. I've used and worked with Evolution wastegates for years now and never had a creep issue NOT associated with wastegate location.

zer0

its the 3" exhaust...

Rasta

At PSI we always use a Evolution with no problems. But they never plumb the wastegate back into the downpipe. I know a guy that has a TC close to my setup using a TIAL with no problems

paul_dezod

I have had customers use the evolution and still have creep issues. I swear by TiAL. Tested and tried time and time again.

Rasta

lol

zer0

lol

Joe_Dezod

Actually in some cases you're actually correct.

On a T25 turbo DSM running a 3" downpipe (apexi N1 for example), you get boost creep. You need to either port or change the o2 housing to fix this issue.

Rastas running a T4 exhaust housing, so it's not that in this case, but seems to be the wastegate. Hopefully switching out to a nice looking TiAL unit fixes the problem.

Rasta

Man I changed the wastegate to a TIAL 38mm with a .5bar spring and it goes right up to .8bar any Ideas anyone. The wastegate is in a good place do you think it is the size of the Turbo?

rhythmnsmoke

Then maybe it is the 3" pipe. I have TIAL as well, and never experienced boost creep. I'm running the ZPI exhaust/S-pipe which is 2.5 all the way through.

paul_dezod

You may need a larger WG to help regulate the pressure. Maybe a 41mm

zer0

50mm HKS...

Rasta

I would trend to agree but I mean we are not talking big boost here .5 that is nothing for this waste gate to handle I am supposed to put the AEM on next week but with this problem I don’t know what to do. I plan to put it up to 12psi but if the creeping keeps up I'm screwed.

Rasta

I doubt that is the problem. I mean it has big exhaust housing. I think it is the size of the turbo I don’t think anyone has one as big as mine on there TC. I tell you what though if I can get this thing figured out this car is going to run hard. I can feel it when I am driving it, it wants to get crazy...If I hammer it in 3rd it cut the tires loose the boost gets to around .7-.8 bar.

paul_dezod

Big boost, not always warrant a big wastegate and vice versa. Sometimes just the shear size of the turbo (big turbo on a small displacement motor) may need a medium size WG to help regulate the boost.

rhythmnsmoke

What size turbo are you running?