C5ontrack

Will I have a problem with noise at Laguna Seca? I'm '08 Z06 with ARC headers and Corsa Extreme exhaust Calloway Cold Air. Thanks

sevinn

From what I have read stock cars have trouble there. You're definitely going to be louder than stock...

hungryhippo

My guess is that setup is around 102db

harrydirty

Just for reference, my stock '07Z measured 92.2db at Laguna last year.

BTW, even 92db days will be rare at Laguna; going forward will be mostly 90db days.

Olitho

The track is going all electric vehicle.

c5_4_me

Awesome. I'm going to go up there and fart really loud.

moose.b3

There were a couple of 103db days this year. Don't remember who it was with though. Very rare. My stock 08Z with the muffler mod checked in at 97db at Thunderhill.

meldog21

Pretty much no way you'll make 92db with headers and aftermarket exhaust.

I have headers with stock Ti mufflers (with cats), and a supercharger. Last time I just made it under at 91db with my modified left hand exhaust deflector. Sorry I don't have better pictures, but it is a big metal tube wrapped in insulation that is open on the left end, away from the sound booth.







Good luck coming up with something, especially something that will stay below 90db.

Dog

smellya

I am hoping the burns stainless 6.25 mufflers with turn downs help me get down to 90 db.

froggy47

WTF they change the db depending on who is renting the track?????????

Seriously?

smellya

I think most are 90db days anymore. Besides when the professionals are out there...

Sidney004

The rental fee is dependent on the db level. There is also a limited number of high db track days per year.

C5ontrack

I swapped out my corsa for stock but the butterfly flaps are open due to missing wires (I think?) that actuate the flaps. Suck a pain in the but I'm thinking of bagging the whole weekend at Laguna Seca

Ipecac

You can take some thick gauge wire and use it to hold the butterfly valves closed. I had it wired to the exhaust hanger and it held tight. They will give you 2 chances to "fix" the problem, but you must do something before they allow you back on the track.

What I would recommend is keeping it in 4th between turns 5&6 then cruze by the shack at 50% throttle. I did that all day w/out getting busted. Then when I was in good shape I did a few full throttle passes until I was black flagged. Once black flagged you can wire the butterfly valves closed and go back to easing past the shack.

Just make sure to practice wiring the valves shut, and bring some gloves because your exhaust will be hot.

Ipecac

Oh and side note. I was measured at 93db when I did a pass at WOT in a 2011 z06, completely stock.

63Corvette

If you go stand on the hill above turn 5, you will hear a firing range banging away EVERY DAY from dawn to dark! Somehow they don't have to comply with any noise ordinances (police range?)

l8te apx

Yes

hungryhippo

If the vacuum hoses are still there, there's a fuse people pull in the pass compartment fuse box to keep the valves open. Maybe the previous owner did it.