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[Woolfi]

Gefunden im englischen E-type-Forum:
Which exhaus system is best:
"My Lotus Elan had a mild steel system fitted in 1995 and it still works perfectly. Mild steel sounds different to stainless and returns the car to the exhaust note it had in period. I have mild steel on my FHC and stainless on my OTS. Some people like the original sound as do Jaguar themselves who are now offering mild steel systems for the E-Type. You can expect about 20 years life out of a mild steel system provided you don't use the car on salted roads. My own tests, which you can find on the Forum, suggest the following:
1. Using anything larger than the standard 1.75" exhaust tubes will cause a torque dip between 2,250 and 2,750rpm unless you install venturi's. It will also make the car very tiring to drive over distance because of the bass boom. OK for the race track (although even there noise restrictions are usually in place) but not for the road. They will also reduce the already low ride height so you may loose the silencers over speed bumps.
2. Tubular headers should be avoided as they reduce torque, increase under bonnet heat that can bubble your paint and make a horrible tinkling sound at low revs. The Jaguar cast manifolds are perfectly designed to optimise the XK engine and act as gas extractors at low revs. Big tubular manifolds will produce more power above 5,000 rpm but are compromised on the road.
3. If you want more power (Jaguar tests suggested 10%) order 'straight through' rather than baffled silencers for a 1.75" system. Noise is increased but remains tolerable and is probably the best compromise for road use.
4. The resonators are straight through as standard. If you want the 'original' E-Type exhaust note use a stainless steel system and fit mild steel resonators as it is they that determine the exhaust note.
So the 'ultimate' system will use cast manifolds, standard 1.75" stainless steel down pipes and straight through silencers mated to mild steel resonators."

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