Just had it installed.. Dyno'd.. Still ran the same exact boost creep.

Kinda suspecting it is more involved than just the pipes... wastegate spring or something to do with heat.

Car is overboosting to around 10.5 psi on the Dyno. The 380's are running at 100% duty cycle. Bad news!

Going to put in a new wastegate spring this coming week and see if I can control the boost a bit more.. Make fuel delivery a little safer.

 

Try to put a cheap manual boost controller on their, it worked for me. Also, while they are in there you may want to take a look at your ac line, trust me!!! Peking and myself can attest to the huge expense as to getting it fixed!!! Lots of heat wrap, lots of labor, and a boost gauge should fix your problem.

 

Interesting....I actually know a guy who consistently logs 10+psi with his.

 

I'm gonna throw another set of +1 step colder plugs in to see if it gets rid of the misfiring close to redline.. The car is tuned rich right now to play safe..

I don't want to open pandora's box the week before a roadtrip.

Anyone know which boost solenoids work well with the Utec? TurboXS makes one correct? Think that will help put the problem into a safer situation?

 

If your overboosting the manual or electronic boost controller won't help. All the manual controller does is keeep the boost pressure signal line from sending an open signal to the wastegate until the full boost pressure has been reached.

I'd install a whole new wastegate. I have an extra one I'm not using I can send to you to to see if that is the problem.

I have never heard of anyone having issues with the wastegate relocation pipe.

As of yet no one can get a BCS to work with the UTEC.

JET

 

Is it safe to say the problem with the wastegate plumbing is the gases want an easier way out so instea dog oing through the wg first.. the gases want to go through the turbo to exhaust? causing it to overboost? In this case.. any solenoid or controller will be useless on the wg lol...

 

Matt,
The relocation kit didn't do much for me either - I still hit 10.5 psi but its not going over that ...so far at least. I guess that is "something".

If you want to try a BCS then just get the GM one. Its like $20 and does the same thing as the rest of the them. ESP will hook you up. I did get it to work witht he UTEC but I didnt like the response with the lower 5psi spring so I ended up putting the stock spring back in and disabling the BCS for now. Its easy enough to turn it back on (just create the map).

 

That's correct.... The path of least resistance is through the turbo instead of the wastegate with a free flowing exhaust.

JET

 

My car is doing the same. Mods are, PIT exhaust, 5/16 themal spacer and 1step colder ngk sparkplugs. And I do have the new pipe. Im gonna go easy on the car till I can tune with the EU.

 

would venting the wastegate to atmosphere help at all? it'll be noisy though.

 

We had one that with the older setup and open wastegate was still hitting 10+ with a 5psi spring!! in the wastegate, we installed the new wg setup and with a bost controller it is hitting 8-9 steady. He also has a big 3" exhaust.

 

I installed the new relocation pipe also, but still see 10 psi on the gauge.

 

Now you have. Looks like its common too.

That would be wrong. I got it to work and I am pretty sure others have too. The BCS can not cure the overboost issue of course. No Boost controller can since they only control the WG bleed.

 

Venting the wastegate to the atmosphere doesn't help with the overboost.

But this does....



Respect
JET

 

are you using the reflash? what your a/f at WOT?

 

i have pit exhuast and reloc kit im booting 9psi car runs hard im usta more power though

 

The reflash has nothing to do with the overboost problem. I know it's trying to accomodate by retarding timing etc.. ie. fuel injectors at 100% duty cycle.

I'm running the Utec now.. after I put another set of plugs in.. we will try to retune and make it a bit safer to play with.

 

so what is the problem? is it a poor wastegate, is it the location of the wastegate, or is it both?

JetPilot, what wastegate did you change to?

 

He's running a big-*** TurboSmart wg that vents to atmosphere.

 

I didn't have the money to experiment to find what the problem was... either inneficient wg mounting or the size of the WG, or a combination of the two.

I hit both problems at once. I changed the way the WG is mounted and mounted it more efficiently and I put on a larger WG. Problem solved.

The WG is a TurboSmart Pro-Gate 48.

JET