Upset with my APR Software. Fuel Cut!!!

**Auditude2.0T** · 09-16-2008 08:45 PM

Im thinking about going Unitronic Custom Software with a Big Turbo from them, Got into a discussion with them and they are putting down some crazy numbers.

**AudiWxGuy** · 09-16-2008 08:53 PM

If I end up moving back to the northeast, I'll go unitronic with you! But not Bt...yet...

**rnp614** · 09-16-2008 08:56 PM

semi off-topic, but what is considered stage 2?

**Auditude2.0T** · 09-16-2008 08:56 PM

These were some of my numbers tonight. If it wasn't for fuel cut they would have been much better.
60-80 in 3.3 Seconds in 3rd Gear
60-100 in 8.8 Seconds 3rd Gear
50-80 in 4.9 Seconds in 3rd Gear
50-80 in 5.2 Seconds in 2nd Gear than into 3rd

This is the first email i sent to Unitronic just to get an idea of what im looking to do.
Hello, I have a 2006 A4 2.0T Quattro Tiptronic (Yea i know Automatic). I currently have APR Stage II Software, Euro Code Testpipe, AWE Catback Exhaust, Labree Downpipe, APR High Performance FSI Pump, Greddy Front Mount Intercooler, Carbonio CAI, and Forge DV. After the FP and upgrade in the software I am still experiencing fuel cut. After much discussion i think im dumping APR for you guys. Do you know if i can hit the 250WHP mark with my mods and your software? Any ideas? Im planing on going with GT28 Big Turbo Kit and would like to run your software any ideas what i can do with that? Im very motivated and anxious to get this car to run correctly. In 3rd Gear at 60MPH i can only make 12lbs of boost at Full Throttle, APR Quoted me 20lbs of boost at Full Throttle. Thanks for the help, Pete...

**tivs31** · 09-16-2008 10:56 PM

you do realize your trans will be completely FUCKED with a gt 28 kit correct?

**dreamcar=rs4** · 09-16-2008 11:12 PM

Originally Posted by tivs31

you do realize your trans will be completely FUCKED with a gt 28 kit correct?

+1
Its okay to flirt with your current power levels but if you go drastically higher you are gambling with your transmission.

**Sal_B7** · 09-16-2008 11:53 PM

^^well with every major engine upgrade you have to upgrade everything else. I have a buddy with a 7th Gen Celica and he has a GT30 turbo on his celica and he is still having to upgrade stuff. From the internals to the tranny. Like they say, you have to pay to play.

**quattrosaint** · 09-17-2008 12:41 AM

Originally Posted by Auditude2.0T

Im thinking about going Unitronic Custom Software with a Big Turbo from them, Got into a discussion with them and they are putting down some crazy numbers.

I know your pain all too well!

**CardNation** · 09-17-2008 07:27 AM

It seems this topic is popping up more and more lately.

Has APR made any acknowledgment of the issue?

I'm very curious to know what the ultimate problem is.

**tivs31** · 09-17-2008 08:16 AM

Originally Posted by Sal_B7

^^well with every major engine upgrade you have to upgrade everything else. I have a buddy with a 7th Gen Celica and he has a GT30 turbo on his celica and he is still having to upgrade stuff. From the internals to the tranny. Like they say, you have to pay to play.

I think the probem is with the automagic trans... I heard at about 300whp your really pushing it, not to mention the torque on the engine as well.

There was a place that does rebuilds that can withstand the power, but I'm honestly asking what's the point? Your gonna pay probably about 5-6k for the turbo, and then another 4 for a new built trans, and you still probably aren't as fast as a turbo'd manual car. My call would be try to sell the automagic and pickup a used manual one.

**Dangler** · 09-17-2008 09:01 AM

Originally Posted by tivs31

I think the probem is with the automagic trans... I heard at about 300whp your really pushing it, not to mention the torque on the engine as well.

There was a place that does rebuilds that can withstand the power, but I'm honestly asking what's the point? Your gonna pay probably about 5-6k for the turbo, and then another 4 for a new built trans, and you still probably aren't as fast as a turbo'd manual car. My call would be try to sell the automagic and pickup a used manual one.

I dont' think the issue is the software alone. There are many factors that can contribute to fuel cut. Cam Lobe wear, Fuel Pump, Fuel Pressure Sensor etc. and going from apr to unitronic, i think is a big mistake. at waterfest this year, there was a mk2 jetta with a Turbo'ed R32 motor and drivetrain swap and unitronic tune. hpa and eip have been able to make 400+ hp on similar set up's. I dont think the car broke into the 300hp range. I wish i had video so you could all hear the car while on the dyno at waterfest. it sounded bad, the rpm's didn't climb smooth, and was stuttering the whole way up.

APR is better than Unitronic, as a whole. APR designs and develops there own parts. They are a big business for a reason, they even have their own racing team of MK5 gti's aside from their business. if they can afford to support that, then they must be making money, and if they are making money they are doing something right.

And to add, i'm not biased either...because i have a GIAC-X chip. Which btw when i first got it 1 year ago, i didn't have any fuel cut. but after a couple of months i started to get fuel cut. can it be the software???i highly doubt it...its not like my ecu grew a pair of arms, and decided to reprogram itself. something is obviously wearing mechanically to create fuel cut.

and the strength of the auto trans in audi's, are not to be slept on. They can handle power, and they have upgrades available. level 10 makes valve bodies and torque converts along with ipt (a forum sponsor). they even have full trans upgrades that handle 800hp for our cars.

a fully built trans vs a fully built auto....the auto will hold its own against the manual with no problems. and on a BT kit, the boost doesn't drop between shifts as much if at all compared to a manual. will an auto trans wear quicker with a bt....yes....and so will a manual. also BT's spool late, and doesn't have the sudden onset of boost, that small turbos like k03's make. so the drive train isn't going to be slammed with torque from a roll. and unless you have 2-step or anti-lag or whatever...you wont be making any boost with the BT at a launch...its safe to say you're trans will be fine for now...

but expect to have to upgrade and repair in the future. same goes for a manual trans also.