Sramsay

Need to get to 88db for lime rock de events. First attempt was a system that my mechanic made. Nice and quiet, but NO top end, can't even get shift night to come on, removing a lot of hp! Any suggestions?

Maciej

Maybe an angled turn down in conjunction with a SuperTrapp baffle?

http://www.supertrapp.com/product_se...t.asp?CatID=32

Viperbob1

88db???? step one, leave motor turned off. step two, make sure fan for climate control turn off unless you have silenced that electric motor.... now you have a car that can pass unless you have a rear spoiler coming down the hill in neutral then the air buffeting may still be too much. Honestly 996 NA motors are sooo loud anyway. I have no idea how you can get to that level. And that is what the locals are hoping...

Sramsay

That's Lime Rock for you! Has to be a way though?

gvtesse

88 db? I thought laguna was bad at 92.

fstockcarrera

996? 996 cup. I get by Limerock with the stock cup exhaust and angled turn downs with no baffles.

Sramsay

Thanks Bob. I will be doing my first race in the cup 4/22-23. I've been watching some of your footage on YouTube. I'll try and keep out of your way! Best Steve

Q&A

88 should be a static maximum i hope. Measured from behind the car standing still with maybe 4000 rpm. I have an M&M exhaust system that allows me to run 93 Db dynamic. dynamic is measured approximately 50 meter from the track, while driving bye. It also has a catalytic converter. M&M claims no power loss.
Never had issues and complied always with regulations. (no affiliation)

Gofishracing

ir_fuel

You want a quiet exhaust? Install the stock 996 GT3 RS exhaust. Ran it on my Cup car for 2 seasons. Thing sounded like a vacuum cleaner from the outside, while still being loud on the inside.

Mind you, the car runs a lot smoother and pulls stronger with the Cup exhaust installed (and let's not talk about the weight of all those mufflers ...)

Q&A

That's a seriously briljant idea

ir_fuel

One very important thing however. Install the OEM GT3 RS heat shields too! Those mufflers generate A LOT of heat.

Q&A

Briljant if you can find a used system for a fair price.
Ordering a new complete 996 GT3 exhaust system must be more then getting an M&M system i guess.

SpeedSyndicate

What year cup? center exit or dual exit? I ask because I have fought this fight before. Also if center are your cats removed?

Sramsay

2001, dual exit