• Advertisement

9A1 Cayman SCCA Solo FP car

Race related chat
Forum rules
Have fun and play nice.

Re: 9A1 Cayman SCCA Solo FP car

Postby grant » Sat May 13, 2017 1:43 am

Chris Hamilton wrote:I'm not sure if they're stock but there are a few abarth fiats in my neighborhood that are obnoxiously loud. I'm not sure if they're doing it to try to get rid of turbo lag or it's just a good way to sell cars now?

Really makes me appreciate how much work VW did on the GTI to keep it quiet and still make pretty good horsepower.

Does that 718 have a muffler button they could leave in normal to quiet it down?

There is a sport exhaust and a sport button that makes it crack and pop more. But at WOT sounds like a vacuum cleaner hose right next to your ear when top is down
2010 Cayman S - Elsa
2015 Boxster S - Pearl
User avatar
grant
 
Posts: 5942
Joined: Wed Jun 30, 2010 5:04 am

Advertisement

Re: 9A1 Cayman SCCA Solo FP car

Postby grant » Sat May 13, 2017 2:01 am

OMG guys you're not going to believe this. I'm still laughing . So I have always had a theory that high temp silicone hose would be perfect noise supressing material on race muffler tip. So I bought a couple 2.5 inch 90 degree high temp Silicon elbows (rated 800 degrees) and slipped them on exhuast tips turned towards the ground. Huge sound reduction.

Question will be will they hold up to 60 sec aX run at full throttle. Ok Kevlar underpants on flame away! :wasntme:
2010 Cayman S - Elsa
2015 Boxster S - Pearl
User avatar
grant
 
Posts: 5942
Joined: Wed Jun 30, 2010 5:04 am

Re: 9A1 Cayman SCCA Solo FP car

Postby grant » Sat May 13, 2017 2:45 pm

Check this stuff out. Phelonic coated 1/4 birch plywood. Stuff used for reusable shipping cases. Super strong waterproof durable and fire resistant too. Thinking it will make good splitter material.

Image

Image
2010 Cayman S - Elsa
2015 Boxster S - Pearl
User avatar
grant
 
Posts: 5942
Joined: Wed Jun 30, 2010 5:04 am

Re: 9A1 Cayman SCCA Solo FP car

Postby Bill C » Sat May 13, 2017 3:45 pm

Looks like interesting material. Where did you find it? and how much$$$$$$$

As for the silicon exhaust, I doubt it will last more than one run. I took a class in sound measurement years ago and they talked about sound reflecting off surfaces and in the case of a car exhaust you would be better off pointing the exhaust up getting most of the sound pressure to go over the meter. I've never had a car that had that issue, so I can't speak from experience.
User avatar
Bill C
 
Posts: 2521
Joined: Fri Mar 26, 2010 4:21 pm

Re: 9A1 Cayman SCCA Solo FP car

Postby grant » Sat May 13, 2017 5:23 pm

Bill C wrote:Looks like interesting material. Where did you find it? and how much$$$$$$$

As for the silicon exhaust, I doubt it will last more than one run. I took a class in sound measurement years ago and they talked about sound reflecting off surfaces and in the case of a car exhaust you would be better off pointing the exhaust up getting most of the sound pressure to go over the meter. I've never had a car that had that issue, so I can't speak from experience.

Hard to find in retail. This was a free sample from a crating company. They make roadie cases bands use for world tours out of this material so stuff has to be light and tough. It's a resin reinforced plywood - they use this stuff for bus floors as well.

I don't know on silicone hose as it's designed for high heat and pressure. Used on hot end of turbos and other extremely hot applications. Reinforced with with some kind of carbonfiber. I ran car at couple thousand rpm for couple minutes and hose looks like new. The silicone elbows are well ventilated so there is external cooling at work too so will be interesting . The heat transfer from stainless tips to silicone is my biggest concern. Almost thinking I should make an aluminum intermediary connection. I'm not worried about car blowing sound with these elbows regardless of direction.

If this doesn't hold up I'm looking at fireproof carbon fiber elbow as well. Non metallic materials seem to really soak up and mute trumpet effect of metal exhausts.
2010 Cayman S - Elsa
2015 Boxster S - Pearl
User avatar
grant
 
Posts: 5942
Joined: Wed Jun 30, 2010 5:04 am

Re: 9A1 Cayman SCCA Solo FP car

Postby grant » Sat Jun 03, 2017 12:37 am

Big wheels! 18x12 and 18x11 for 335 and 315 Hoosiers
Image
2010 Cayman S - Elsa
2015 Boxster S - Pearl
User avatar
grant
 
Posts: 5942
Joined: Wed Jun 30, 2010 5:04 am

Re: 9A1 Cayman SCCA Solo FP car

Postby grant » Sat Jun 03, 2017 10:25 pm

Lol! This is a ridiculous amount of rubber. :lol1:
Image
2010 Cayman S - Elsa
2015 Boxster S - Pearl
User avatar
grant
 
Posts: 5942
Joined: Wed Jun 30, 2010 5:04 am

Re: 9A1 Cayman SCCA Solo FP car

Postby grant » Sat Jun 03, 2017 10:27 pm

Look where I started this year. 285 A7 compared to what I'm going to run.
Image
2010 Cayman S - Elsa
2015 Boxster S - Pearl
User avatar
grant
 
Posts: 5942
Joined: Wed Jun 30, 2010 5:04 am

Re: 9A1 Cayman SCCA Solo FP car

Postby mikey » Tue Jun 06, 2017 5:24 am

Ha ha ha. That is some serious rubber
There is another racecar in my future
User avatar
mikey
Site Admin
 
Posts: 8463
Joined: Fri Mar 26, 2010 6:10 am

Re: 9A1 Cayman SCCA Solo FP car

Postby grant » Tue Jun 06, 2017 5:45 am

mikey wrote:Ha ha ha. That is some serious rubber

Yeah I'm sure to break something now!
2010 Cayman S - Elsa
2015 Boxster S - Pearl
User avatar
grant
 
Posts: 5942
Joined: Wed Jun 30, 2010 5:04 am

PreviousNext

Return to Paddock area

Who is online

Users browsing this forum: Tshapowal and 43 guests

  • Advertisement