race exhaust

[Scougar]

I didn't look as was in work cloths, but I remember that number XSR03 on my exhaust as I took 5 minutes looking up and down the exhaust 3 days ago (under the car) checking for a manufacturer, but couldn't find one. Then today I see the only sticker in my car (came with it) is a metal Magnex stuck on the glove box! lol.

Put boot down a bit on the motorway on way home tonight for 2 miles, sounds ok on fuel revs, but not 'that' loud really. I wonder if it is the cat or points to other problems... hmm.

Matthew

[car13]

noise is not everythnig I have used janspeed and power flow on former track cars the biggest differnce to noise is have a decent induction kit a decent 4 branch manifold not cat and a free flowing exhaust
the amount of kit under bonnet will effect noise to.

Most race based systems seem to be about 95db its just due to liberal idiots that buy home near a race track and then complain about noise

The man thing is to get gasses out quick to be fair on a non mondded car a decent free flowing back box will help that does not include labotimised bean tins as nova fans seem to buy.

The system has a silanced decat which is designed for comp use only and is beeter than a cat with ineerds banged out of pipe as again allows for more noise reduction so more bhp can be put through system with less noise

Pete

[Scougar]

What's the optimal exhaust diameter for the F7P (1.8"?) and F7R(1.9"?) engines?

Since I already have exhaust no point spending on another, but just wondering if any exhausts for the clio that taper so that as the exhaust gas cools on way through the exhaust (and contracts) it keeps the speed up (wrong term but tired so help me out here).

Matthew

[david932]

not sure but an f7r is a 2.0 and the term your looking for is "back pressure"