Boost Creep

[beans33]

I set my boost controller to 15 psi and it stays there at WOT until I get higher up in the rpm's and it creeps up to like 20 psi. After searching about this problem I still don't see how i'm getting creep. Everything is ported with the exception of the exhaust manifold (look in profile). I have changed the boost controller and checked the actuator and I saw no improvement. Is the only option i have externally gating the turbo or are there some other things i could try to fix the problem.

 

[kottyking]

Port the hell out of that manifold. Also did you port the wastegate, where the flapper connects because the usuall cause of the boost creep is because the air has to make such a hard turn.

 

[blcknspo0ln]

It probably means that you did not port your turbine housing correctly. You want to remove the step that leads into the wastegate hole and actually enlarge the hole ( but leave enough for it to seal). You also want to port your o2 housing and eliminate as much as that divider in the o2 as much as possible. I suggest either porting more to hold 15 psi, or get more supporting mods so that you can run 20 psi safely. at 20+psi, you should hold boost just fine.

 

[beans33]

Port the hell out of that manifold. Also did you port the wastegate, where the flapper connects because the usuall cause of the boost creep is because the air has to make such a hard turn.

Correct me if im wrong but the turbo I have (16g Evo 3 "GT") comes with everthing ported.

 

[beans33]

What would i need to add to my setup to run 20+ psi safely?

 

[blcknspo0ln]

What would i need to add to my setup to run 20+ psi safely?

judging from your mod list, you will now need injectors and a tuning device to hit 20 psi. Also, the evo III GT is modeled after a ported e316G. That type of porting is for flow, not for curing boost creep. This is also true for most vendor porting.

 

[cagedbull]

is it internalls gated??? could be the waste gate spring... it should have an adjustment... and a 3" turbo back exhaust should cure all boost leaks

 

[blcknspo0ln]

is it internalls gated??? could be the waste gate spring... it should have an adjustment... and a 3" turbo back exhaust should cure all boost leaks

whats up man

16G's have nonadjustable WGA, so there is no way to get an adjustment for it. Also, a 3" turboback is the main cause for boost creep, not the cure. Actually, going back to a stock setup will most likely help with boostcreep so that your exhaust flow is more restricted. Anyway, porting in the right areas is the key to curing boost creep. Either that or go external.