Remembering fitting a new silencer box on my first Mog...a 4/4 , it was a stainless heavy bugger.
Any scope in a lightweight exhaust?
Post cat anyway as heat issues would be less.
Any idea what the rear box temp gets to?
If not too high then aluminium box provided sound limits could be met?
Costly, but titanium would save weight.
Mild steel or stainless are the traditional options and both are heavy but affordable.
I watched the program on TV about the Pagani and that had Ti exhaust.
Already on the case, not for the 2016 build but 2017 and not titanium as thats still really to heavy for 2017 car. An Inconel full system is the way I'm heading. Its the material F1 etc use.
Titanium is about 1/2 the weight of inconel, Inconel is actually heavier than off the shelf 300 series Stainless steel, it is only its ability to retain decent strength in thin sections at elevated temperatures that make it worthwhile to use for exhaust or turbine components
It is also frighteningly frighteningly expensive to form and weld
When I interviewed at Lotus F1 to run their fabrication shop 3 years ago, we got talking about costs, hours etc to fabricate an exhaust.
60+ hrs per manifold (ie one bank of the engine), £15000 per side, and they would change them every race weekend....
The tubing was 0.8 mm wall thickness prior to bending, the outside bend (stretched) area after bending was was much much thinner. Akin to welding razor blades....
I for one would not like to see that level of expense within a club level championship. Sure, we all want to win races, but cheque book racing where an exhaust system can cost more than some people's entire budget for the season...
Really are you sure?
Whilst I admire your ambition you can lose an equivalent amount of weight elsewhere and probably higher up in the chassis for a fraction of the cost
For what it's worth, I've made aluminium silencers and the likes (and an awful lot of manifolds in stainless steel)
The silencers are difficult to get through noise testing, as the casing tends to "sing" a bit, and add to the decibel level
Simon @ SiFab
