TTP tunes the Megan Twin Exit TBE'd GSR to 344whp!

TTP Engineering · Oct 5, 2009, 08:19 PM

Gabor brought to us his 2008 Evo X GSR unmolested. Earlier in the week he had secured an appointment for dynotuning and wanted us to aquire and install a turboback exhaust system on his new car.

With our help he settled on the Megan Racing twin exit ss polished exhaust system with matching downpipe and testpipe.

Immediately upon datalogging the car, we found the boost to be high and erratic. We are unsure if it is related to the free flowing exhaust and reduced backpressure raising up the boost however it is a likely contributor. Baseline boost was at a surprising 24psi, not far off from the final boost value after tuning shown below:

In the end, the stock wastegate actuator response was still kind of strange, like it was tighter than some other stock actuators we have seen, but we managed to wrangle the duty cycles of the twin boost solenoids and get it under control.

The baseline was a little off kilter since the exhaust was already ON THE CAR at time of testing as well as the unorthodox 24psi stock boost level this 4b11 was working with right off the bat.

In the end the Evo X gained about 50whp within a half psi of the factory boost of 24psi, however with our custom programming, MIVEC cam control the car settled at a healthy 344whp with a very happy Evo owner behind the wheel.

XEVOX08 · Oct 6, 2009, 09:27 AM

I got the megan single exit.....thing seems to flow well!

jayevo23 · Nov 12, 2009, 08:10 AM

yea i was wondering about this exhaust myself. I heard that megan wasnt really worth buying. The exhaust it beautiful tho.

lex08gsr · Nov 13, 2009, 06:22 AM

WoW! 344 on a mustang dyno? Holy crap.....

**atombomb33** · Nov 14, 2009, 04:59 PM

Gains are right in line with what you'd expect for tuning after an exhaust install. Nice job.

IXmr321 · Nov 14, 2009, 05:02 PM

I sent Gabor over to see you.

So you're welcome. And you still have my Kanye CD.

JaxRRevoX · Nov 14, 2009, 10:51 PM

other supporting mods besides a TBE.........?

Quote:

Originally Posted by JaxRRevoX

other supporting mods besides a TBE.........?

?????

Quote:

Originally Posted by TTP Engineering

The original posts states TBE only.

actually it doesn't, if it was it wasn't clarified, that's why i asked...

So the car was stock before the TBE?? But you said you guys picked up 50whp so before the TBE when it was stock it made 296whp????

XEVOX08 · Nov 14, 2009, 11:05 PM

344 on a mustang dyno? Doesn't sound right?

TTP Engineering · Nov 14, 2009, 11:25 PM

Quote:

Originally Posted by IXmr321

I sent Gabor over to see you.

So you're welcome. And you still have my Kanye CD.

Gabor is a good guy. He was real happy with how his car turned out. Thanks

TTP Engineering · Nov 14, 2009, 11:29 PM

Quote:

Originally Posted by JaxRRevoX

?????

The original posts states TBE only.

stevodaevo · Nov 14, 2009, 11:39 PM

so 344whp on a tune and tbe only??

I guess I need a different tune to gain stupid high whp

GO ON 3 · Nov 15, 2009, 08:58 AM

TTP Engineering · Nov 15, 2009, 11:13 AM

Quote:

Originally Posted by JaxRRevoX

So the car was stock before the TBE?? But you said you guys picked up 50whp so before the TBE when it was stock it made 296whp????

Stock car came in. TBE was installed. TBE was baselined at 24psi. The 50whp gains were on top of 24psi and TBE baseline.

JaxRRevoX · Nov 15, 2009, 03:04 PM

Quote:

Originally Posted by TTP Engineering

Stock car came in. TBE was installed. TBE was baselined at 24psi. The 50whp gains were on top of 24psi and TBE baseline.

AGAIN you didn't answer my question, what did it put down BEFORE you started tuning WITH the TBE......?

TTP Engineering · Nov 15, 2009, 03:20 PM

Quote:

Originally Posted by JaxRRevoX

AGAIN you didn't answer my question, what did it put down BEFORE you started tuning WITH the TBE......?

All you have to do is read the thread to learn that the car came in, had exhaust installed and was dynoed as a baseline after the exhaust was installed. The car was not dynoed without exhaust.