Need Help with a possible Boost Cut issue???

[EddyV1987]

So I have a 2007 MS6 with the Following Mods

ATP GT3071R,ATP Turbo Inlet pipe,Greddy EBC, AEM CAI, CPE FMIC, CPE Downpipe (catted), Corksport CBE, TurboSmart Dual Port BOV, CPE Upgraded HPFP

Cars Currently at 305WHP at 19 PSI

I'm having what seems to be an overboost issue. When I'm at full throttle and hit about 4,500 - 5,000 RPM The car will lose power and it feels like I'm Pumping the brakes while still on the gas pedal. Happens mostly in 4rth,5th, and 6th gear Ive been searching trying to figure out what might be causing the issue and I'm not really sure what it could be. Looking for a way to fix it. If any one has any helpful input I would really appreciate it. Thanks in advance.

Attached Latest dyno graph to thread

[Chimmike]

What are you using for engine management? Let's see some datalogs....

why greddy ebc when you could use ebcs ?

[86AmishMs3]

Originally Posted by EddyV1987 So I have a 2007 MS6 with the Following Mods ATP GT3071R,ATP Turbo Inlet pipe,Greddy EBC, AEM CAI, CPE FMIC, CPE Downpipe (catted), Corksport CBE, TurboSmart Dual Port BOV, CPE Upgraded HPFP Cars Currently at 305WHP at 19 PSI I'm having what seems to be an overboost issue. When I'm at full throttle and hit about 4,500 - 5,000 RPM The car will lose power and it feels like I'm Pumping the brakes while still on the gas pedal. Happens mostly in 4rth,5th, and 6th gear Ive been searching trying to figure out what might be causing the issue and I'm not really sure what it could be. Looking for a way to fix it. If any one has any helpful input I would really appreciate it. Thanks in advance. Attached Latest dyno graph to thread

If you're not using any tuning platform you set yourself up for fail right out the door.

So get a Cobb AP, ditch the greddy ebc (it's not a feedback loop for the ecu) and get a different boost control device, get a 3" or bigger maf intake.

Don't floor it till those conditions are met.

[Chimmike]

Originally Posted by 86azms3 If you're not using any tuning platform you set yourself up for fail right out the door. So get a Cobb AP, ditch the greddy ebc (it's not a feedback loop for the ecu) and get a different boost control device, get a 3" or bigger maf intake. Don't floor it till those conditions are met.

seriously. If not using any engine management it's a miracle no zzb yet.

[EddyV1987]

Car was tuned using a Cobb AP. I was thinking I fudged up with the Greddy Boost Controller.

[Chimmike]

Originally Posted by EddyV1987 Car was tuned using a Cobb AP. I was thinking I fudged up with the Greddy Boost Controller.

you need to take some logs.

and use the AP to control boost, not the greddy. Much better at controlling it. That will require an ebcs like grimmspeed or cobb.

[EddyV1987]

Thanks for the input guys. Going in for another tune soon with a Big CPE MAF, Better Mani, injector seals and definitely a cobb boost controller soon. Gotta ditch that Bull shit boost controller. The car runs like a champ other than that issue.

[Chimmike]

get a JBR 3.5" MAF. that CPE "big" maf isn't that big. And that catted downpipe isn't doing you any favors.