So you're saying that once we crack VVEL, we'll be running down gtrs in our boosted zs? :happydance:

VVEL is technically "unlocked" already, but since its ability to be controlled we have not see any huge boom in power or changes. Whether it is from tuners not wanting to touch it or it has no gains without other additions I am not sure yet.

I know Z1 has touched it, uprev in Austin of course as since they write the software, but no word about others.

Update:

So after my initial post I've notice a loss in power. My tuner said something about data not copying over and sent me a new tune. And this is where the story picks back up.

After speaking with Stillen I recently puts cats back on and only see a max of 7psi very high up in the rpms, basically redline (I'm guessing this means I do not have a 928 impeller?). The map switching has stopped but now I've felt a huge loss of power. I sent logs to Stillen and they said besides running a little rich up top everything is fine.

I also sent logs to my tuner and he said on 2 out of my 3 pulls my throttle body is only opening half way even though he can see in the logs that my pedal is 100% down. I tried doing a throttle body reset and I didn't notice any difference. I checked around for boost leaks and couldn't find any. Though I'm sure a smoke test would be better then a soap and water test.

Any input is appreciated I've been very upset with the results after the amount of money I've spent on this setup. Especially since I really do not have time to troubleshoot everyday which is why I went to a shop.

I guess I will be taking the 3 hour drive back to R/T so they can put it back on the dyno. Getting annoyed, but I guess that's how it goes.

Thanks in advanced to any input. Mark at Stillen has been great and so has Vince at R/T tuning!

How's your fuel pressure? Sounds simialr to the things I was feeling with mine before it quit. I wasn't able to make any boost at the end . Fuel pump install was no good .
But 7 psi even on the stock 8 psi you should see 9 . Do you try reloading your tune resetting everything ? I felt a loss in power at another time but was still making 9psi.
I reflashed my tune back in and the car was fine

I can try reloading it again, but yes I've reloaded the new tune before. According to the tuner everything except the throttle body is fine. So I can only go off what he's saying meaning the fuel pressure is ok.

So would this point to a minor boost leak as well? Cause I never see 8psi even if I bury the rpms. Most I see is 7 right near redline.

Drove all the way back to the shop and it didn't go on the dyno >.< . They test drove it and said it runs fine. I'm glad I drove 3 hours back and forth for nothing.

I reload the tune and it runs fine. As soon as I come to a stop the car drops to around 500 rpms under idle and kicks back up to around 1k. After that I have a lot less power. It's like the ecu is not accepting my tune and throwing it into a limp mode. And I can get this to happen EVER time I reflash the ecu. I sent about 5 data logs to the tuner, but they are always slammed and they have trouble making time to check my logs out.

Not sure what else to do but bring it somewhere else which I don't want to do because shop hoping will get you in trouble. But I've been trying to solve this problem all year and now I'm getting annoyed.

Anyone else have an issue like this? If so what can I do? I really would like to enjoy the car once this year....

Very sorry for your troubles man, sounds frustrating. Have you checked for vacuum leaks? I had a similar issue with the idle dropping and saw I had a vacuum leak which was the culprit. Before I found the leak I would start my car and it would instantly be in limp mode and once I shut off and restart it goes back to normal. 2 months troubleshooting and it was a damn vacuum leak causing this issue. Very weird but that was the case with me.

I sprayed brake cleaner around my throttle bodies and that's where my leak was. The idle dropped instantly after I sprayed directly at it so I swapped out my O-Rings behind the throttle bodies, secured everything and all was good.

I checked for leaks the other day. I'll check again with a smoke test instead. Thanks I'll be back lol

if its your idle sounds like a vacuum leak to me also if the car is not getting correct boost levels could be same reason.

I agree with this 100% and this was causing lots of issues for me as well. Idle/boost/tune were all thrown out of whack.

Ok. Hopefully I'll have time this weekend to check again. Thanks again for the advice.

Topical areas to look for with this kit is under the manifold. If your doing the smoke check start at the intake filters, before SC. That will show you leaks in the SC boot were BOV ties in. Second pull vent line off intake tube and smoke it out. That will show leaks in the TB's, Vacuum Lines and under the manifold.

My Boost showed 11 psi then dropped after a few days, my issue was getting the manifold tighten with equal pressure on all the bolts. One to tight or loose will create a leak. Flaw in design of intake, no access to do it right.

Check with tuner: If he can't get 3 runs with solid numbers to establish his Base Line to adjust from, it may not be your tune at all.

With these kits the MAF's are close to the filters when the cooling fan from the tuner turns on it can create + pressure reading in the MAF and throw the base line off. Tuner continues to tune of bad base line. Happened to a few people here on the forum. Called Stillen and got no help.

Here is what I did to try to get 500 HP:
DW 650 injectors
CJM Fuel Return System
DW 300 fuel pump
928 Impeller
Ditched hose clamps and added pressure bands
Drilled out the intake and added AN12 fittings to flow more coolant
Removed battery and added 1/2 gallon reservoir for cooling
Added UpRev MAF's
Added Turbo Smart BOV
COG drive belt to eliminate slip

In the end, i saw 480 max and was plagued with leaks. Every weekend went through the car to fix leaks. Every tune power dropped. Every smoke check was always showing something new.

Good luck, its a good kit as is for daily driving and fun, 50 state legal and all.

Well I guess this is bad news for me since I bought your kit. . .

ooohhhh....snap

WOW !!! Opps ,


So anyways I never had one leak with mine. I also ran 457 WHP no leaks "yea yea 3 days only" but in stock form never had an issue with any leaks, BTW only got 6 months out of it that way too :(