GT3DE

with my 2010 GT3 on GMG headers and side muffler delete, I am thinking car could use a tune that would get some more power. Also considering deleting the rear muffler as well. I know this will again change the performance of the car (lose of low torque, possible higher end hp). I am guessing that with a proper tune that the car with no mufflers and the GMG headers will have dramatic power increase (to better hang with the cup cars).
Can I ship the ECU to someone and then reinstall and good to to go? Or do I need the car on a dyno?
So who should I use to do this?

TRAKCAR

Eddie
I think his 3.8RS made a few hundred dyno pulls but you will have 25HP more than the next 3.8RS.

NorthVan

The factory tune is designed to work with your stock headers, mufflers and intake. Changing any or all of those items will mean your tune isn't set for your current set up. I would definitely do a tune, it may not give you any real gains, but it will tie it all together and it will run smoothly.

EVOMS

EVOMS or Sharkwerks can handle our tune for you, and we have great results and feedback on these cars. There's been a lot of recent feedback on the forum about the benefits--any of these combinations show a meaningful increase in power, midrange torque, and throttle response.

With the side muffler bypass, you're going to lose a lot of low end torque. See the comparisons here. As you can see there, it is worth a fair amount of midrange power with lesser gains up top. Headers and a tune will help compared to stock, but a lack of backpressure is a lack of backpressure, and I would evaluate if your driving style and use of the car benefits from the weight savings/sound more than you miss the low end.

We haven't run any cars in-house with the side muffler delete but with a center one intact--sounds like Sharkie might know more about that .

Sam

tjsmaryland

Behe Performance in Beltsville, MD can supply a custom tune. But they will need your car. They do a lot of custom P-car tuning. I gained about 20 HP with their help. Stock headers w/side muffler delete.

mdrums

Clarke...Eddie is your answer to this.

Izzone

Clarke....just copy the M&M set up with no cats eddie had. His car made real good power when he was done with it.....I mean it was stock LOL

GT3DE

Dropped the OEM center and went with straight pipes that have those little in-line can mufflers (AutoQuest had a used set laying around their shop). Keeping GMG headers (with cats emptied out). AutoQuest is sending my ECU to EVOMS today. Should be back in car by Tuesday evening.
Talked with Eddie and the better/best exhaust setup (headers, pipes, no muffler) was a bit more money than the free pipes/cans I got from Autoquest. I know I am missing out on a little bit of power but keeping my $.

NorthVan

so you have essentially cat less headers, and no mufflers. Is that correct?

If so how loud is it? I run cat less headers, and all the factory mufflers, when I press the sport button it gets pretty loud...especially for the street.

aussie jimmy

it would be very loud.....


bottom line though is, with highly evolved n/a motors, the gain by doing exhaust, ecu, intake, cams, heads.....is limited to about 25-40hp. that's a fair advantage when racing against standard 997's, but when you are racing against cup cars, they have the mega advantage of being lightweight and having a fully-sorted race chassis and transmission ( the sum is greater than the individual parts in this instance).
only when the cup driver is sub-par, can clarke keep up and menace these cup cars with his 'sleeper' blackie.
what you need clarke, is a cup disguised as a roadcar 997. problem is, it needs to begin as a cup. not the other way around.

what's another 911 to add to the collection, eh?

TRAKCAR

Jimmy, don't go all logical on us.

aussie jimmy

hahaha!

FLA997

he'll get there... the hard way

GT3DE

I just want to be able to stay in front of the 996 Cups. No chance of keeping up with the 997 cups. But not spending the same $'s they are either.