Spec Boxster Build

[thstone]

Went for a drive this afternoon - love this new exhaust! Its not so loud as to wake the dead but it definitely give the car a roar that was missing in the stock muffler. Definitely a keeper.

[Nine8Six]

Originally Posted by thstone

Went for a drive this afternoon - love this new exhaust! Its not so loud as to wake the dead but it definitely give the car a roar that was missing in the stock muffler. Definitely a keeper.

I was convinced you guys got hit bad as well RE noise restrictions (circuit wise). You sure yours passes? Still got the cats right?

[trygve]

Every track is different as far as limits and enforcement go. For northern California, they now have 103db limits at Sonoma and Thunderhill. Laguna Seca is the worst, with each date getting a different sound limit; most dates are stuck at 90db-93db, and the county doles out a select few (incl. ALMS, Moto GP) at 105db. So glad they built golf course homes near a classic race track!

I had my Spec Boxster sound-checked at Laguna Seca with no cats and the Boxster S muffler, and it was 87db. The louder systems can exceed 103db, but most people get mufflers designed to stay well within the 103db limit, but have run into trouble with some systems that have filler that degrades over time and gets louder. Lucky folks who go places with no limits get straight pipes!

[rastta]

Originally Posted by trygve

Every track is different as far as limits and enforcement go. For northern California, they now have 103db limits at Sonoma and Thunderhill. Laguna Seca is the worst, with each date getting a different sound limit; most dates are stuck at 90db-93db, and the county doles out a select few (incl. ALMS, Moto GP) at 105db. So glad they built golf course homes near a classic race track!

I had my Spec Boxster sound-checked at Laguna Seca with no cats and the Boxster S muffler, and it was 87db. The louder systems can exceed 103db, but most people get mufflers designed to stay well within the 103db limit, but have run into trouble with some systems that have filler that degrades over time and gets louder. Lucky folks who go places with no limits get straight pipes!

Sonoma has now reduced sound to 100dB. Laguna only offers 90dB to HDPE's now - they have reduced it from the 93 dB. Thunderhill is still at 103dB.

I've never seen anyone get hit at Thunderhill over the 7 years I've gone there - and there have been some really loud cars. Same with Sonoma - but that may change with the new reduced limit. As for Laguna - it's by far the worst - but i've seen some pretty creative setups to meet sound

[Eric523]

All of the tracks in SoCal are open sound. This year the only track we hit with a restriction is Laguna and we will have a 105db limit there since we are running with the Pirelli Cup series full of cup cars.