Sound question for Jennings GP

I signed up for Jennings in December, and I'm running a full M4 for my '08 GSXR750. It doesn't have a dB killer in the pipe, so I'm trying to get an idea if anyone has ran a similar set-up at Jennings. I believe that they have sound restriction. All of the tracks that I have ran here in the north (BHF, Road America, Grattan, and Autobahn) haven't had any restrictions, so I haven't had any challenges.

I just don't want to drive down there and get flagged for noise.

 

They strictly enforce the db level at JenningsGp. If you can't get it silenced, you will not be allowed to ride it.

 

My 05 750 has a full TiForce exhaust and the packing is mostly burned through, I think. No problems.

While I'm sure some legitimate setups have noise issues, I think that rule is more for the bikes with one of those obnoxiously loud straight pipe extensions.

Stuff like this:

 

I'm getting me some of them VOO DOO's for the TLR and firing my bike up at 4AM There!!!!!

 

i was just gunna let mine idle off the headers all night so i dont got any cold start issues in the AM

 

My R6 has a full Arrow system without the DB killer and I was fine earlier this year in March. You should be OK.

 

Yep as long as that CAT under your belly pan is thee on the M4 you should be good...

 

Thank you. This is super helpful to know as a guideline.

 

Nah. Full M4, so no cat.

 

That is awesome!

 

Uh oh, I'm glad I read this thread since I was going to head down to FL for the December event.

Looks like the limit is 104 db on the straight? Time to do some testing with db killers...

 

So straight Ti Pipe then the silencer? If that's the case get tested..... They don't play around I know for a fact...

 

Sounds like a great idea, but I guess I would need to know the requirements. Meaning is that 104dB at the exhaust tip? At 50ft? At 100ft?

Does that make sense? A pipe that is 104dB at the exhaust tip is not as loud as 104dB at 100 yards.

 

From what I remember its 104 just from the outside of turn 1.... I will try to find out more...

 

You are correct. Last December I didn't see anyone removed from the track for sound. There were some really loud race bikes there and nothing was said. That could change this year for sure.

 

They stand right next to the Start/Finish line with a meter, black flag if you are over the limit. People use steel wool, clamps with metal, etc. to cut the sound.

 

"They stand right next to the Start/Finish line with a meter, black flag if you are over the limit. People use steel wool, clamps with metal, etc. to cut the sound."

Several told me, they just take it easy at the Start, Finish line. So you won't be getting first place

 

Funny thing is that was my first thought was to short shift right before, so that I bring the rpms down.

 

Maybe just pull the clutch in and coast by the meter maid.

 

Maybe just take your hand off the throttle and flip em off!