Exhausts UK

[elj221c]

Sadlotus,

You say Susan Millar manifolds are good? Are the flanges that abutt the head made of stainless? I bought a Chris Neal one a few years ago, left it in (bad!) store for too long and the flanges had rusted beyond use, being made of mild steel. NOT good! So I am after one with stainless flanges.
Incidentaly, I have heard it said that stainless systems are more noisy and have caused problems at track days. Any comments?

Roy
'65S2

[fasterbyelan]

Mick Miller did not recommend the use of a stainless steel rear silencer box for this reason (the sound was harsh and one would tire of it) suggesting a normal steel item. The remainder of the system was not deemed to be a problem when made of the more durable material.

Do forum members agree with this?

[SADLOTUS]

Hi Roy
I saw the Susan Miller stainless exhaust at Stonleigh, I wanted to compare it to the Paul Matty one. The Miller one looks nice - standard bore, smooth bends, nice welds but i'm sure the flanges to the head were normal steel. The manifold that Paul Matty had at the show was a stainless larger bore, the quality looked good and the flanges (I'm pretty sure) were stainless, BUT, I didn't like the way the pipes had been cut and 'stitched' back together in order to get the larger bore to fit the tight space, lots of welds running down the side of the pipework, it looked a bit 'patchwork'. I hate to criticise people's obvious hard work but it was 250+ pounds and the Miller one: 110. The TTR 2" manifold is lovely, equal length tubing, great quality and bends, and a nice captive nut squeeze idea at the Y piece, but a very tight fit, mild steel and expensive - in fact I believe the chassis has to be eased/bent/cut in order for it to fit (definately, please correct me if I'm wrong!)
I came away even more undecided - (nothing new there then)
May even clean up my old CN mild steel manifold for a tenners worth of paint!

[mark030358]

I tried three of the cheaper type "double XX" ones and they were in my opinion very poor. The holes on the flanges did not line up with the head, they were not square and hit each other!!! and I was just trying to fit it on the bench before I re installed the engine. I bought a MAtty one, expensive, but a superb first time fit and no problems.

Mark

[steveww]

TTR recommend mild steel for the manifold as stainless tends to crack with use. The rest of the TTR system is stainless.

[lotusanglia1965]

When i used to make stainless exhausts, we always preferred mild steel flanges,as the combination seemed less prone to cracking at the welds. as said earlier, stainless in general is more likely to crack than mild,especially if a badly made system is stressed to fit the car.hence custom made system always better than off the shelf. sue miller manifold is a good fit.
Martin

[pereirac]

I kept my original Double S manifold in the garage (as a spare) and it looked like the flanges started to rust. It appears that not all stainless steel is the same. I used to think that a magnet would not stick to stainless steel, but it does to mine..

Carl

[Dag-Henning]

- a new TTR chassis has a cut-out in the left front "fork" to make room for the manifold. Can relatively easily be done to an old chassis , I believe...

Dag