KaiB

The entire exhaust is a custom fabrication from Rothsport. The prototype went onto another 3.6 just completed, this is the first production unit.

freedman

Looks rather special, and potentially rather expensive me thinks..

Be interested to see a centre exit on a 964

boxsey911

We WILL need a sound clip posting up!!!

jamest

Any idea what sort of weight saving you are looking at over a standard silencer setup? Such an exciting project this.

bobaines

Very nice looking exhaust. The whole project should make you smile.

PChar

Kai, this is very exiting. I like the exhaust system,...please let us know how it sounds.

Thanks for sharing

Steve Weiner-Rennsport Systems

Good question,.....

The objective here was optimizing power & torque curves so weight was not a consideration. It feels no heavier than the racing systems we were using previously.

Its working VERY well on other race engines, but we've not used it on an engine in this particular configuration. We will be comparing them on the dyno this week to get some hard results.

christallon

This should be awesome. Can't wait for preliminary results from the dyno

geordie

Very, very nice.

RSAErick

Hey Kai, we're excited for you. Should we start a Rennlist betting pool for peak hp and torque? Closest to the actual numbers gets a track day in your car?

Cheeksyboy

Like the soound of that...

.......are flights included!??!?!?!?!

KaiB

If you can pull out first time without stalling or spinning the wheels - OK!

Forwarned about dyno numbers in that they are what they are when they come out of the engine room.

No translations to the rear wheels (although that will happen later on the dynojet) and no extrapolations from a rolling road to bhp. The numbers will be real and absolute for Gamroth's dyno.

We expect nice things, of course, given that the bottom end is stock.

I have a number in mind and of course the torque curve will be gorgeous.

RSAErick

Deal!

Err on the side of wheel spin: best case scenario is that we're in for the ultimate track day; worst case scenario is that we'll lay down one helluva burnout!

Vandit

I always wanted to see a center exhaust ala 997 GT3 on a 964. I can't wait to see it all done up.

Tom '74 911

Hi Steve -

Does this muffler flow similar to the photo w/flow arrows below? If it does, is the system plumbed into the lower inlets (black arrows w/a more direct path in the second photo) or the upper inlets? I've been thinking of piecing together a system like the one from the 3rd photo - stolen from another Steve W (Wong) w/the vacuum actuated valves that close at lower RPM (quieter) and open at higher RPM (better flow). I've been kinda stymied in terms of sourcing the necessary parts etc... but kind of an interesting solution I think . . .