k3v7n

Looking into an upcoming track day at Laguna Seca. Anyone know if a .1 GT3 with GMG center-section exhaust will pass a 90db limit?

996FLT6

Even stock exhaust won't pass when it use to be 92 db. You need turndowns. There's a plug mod to prevent full open on stock exhaust but don't think that will work plus you'll lose some hp. Mike

k3v7n

Thanks. That's what I was afraid of!

996FLT6

You may want contact SP MOTORSPORTS about turndown pipes. Mike

usctrojanGT3

I'm done with that track with the stupid DB limits.

Stephen Ayers

With a “GPS box” and turn down pipes I pass sound with center section delete. Contact Alekshop to set you up.

Crazy Eddie

You need one of these ...
They will be avail very soon according to Tom

boostedt0y

I've passed sound at Laguna with GMG center muffler and exhaust valves closed in the past. As mentioned above, you lose a bit of power and it's not exactly good for the car given the added heat from running the valves closed.

Best bet is to contact Alecshop and get their GPS box and turndown pipes to pass sound at Laguna.

F1CrazyDriver

I wouldn't bother w LS. no fun w turn pipes- worrying that they come lose and hit your bumper. saw that happened repeattetly to a 997 cup car 2 weeks ago :/

thankfully I was tracking Smart Fortwo / hanging out.

r6elmo

combination of turn down (left) and the GPS box works on the 997 and 991 GT3s. On a hot day I'd worry running valves closed all day.

Oddly, my E46 M3 with full exhaust system passes he 90DB all day.

996FLT6

Lol- smartfortwo? If true did the same at thill. Hahahaha. Mike

F1CrazyDriver

John mentioned you did before. That's pretty cool. I have had a 2008 / 2012 and now 2016 model. New one is manual. soooo much more fun, although the DCT in new model is really fast for pdk guys/girls.

996FLT6

Lucky you with the mt. I remember I was in the 2:30 range at thill cyclone - hahaha. Mike

Larry Cable

https://www.dynocomp.com/dyno-comp-l...-tips-gt3.html