Ron wrote:
Second question on the exhaust system to use with headers. Local exhaust
specialist says twin pipes off a six cylinder with headers loses 30-40hp
when compared to a single pipe system. Now I'd like to keep the sound and
original appearance of twin exhaust and am prepared to sacrifice a small
amount of HP for it, but not this much! I'm sure someone has an opinion on
this...
Ron,
I think those 'specialists' are having a go at you. I find it hard to
believe that a single pipe would increase h.p. over a dual pipe system.
Every school of thought that I've ever known seems to say better breathing
on both ends provides increased performance. All PI systems were dual
pipe. The early U.S. market TR6s were single but eventually changed to
dual pipe around 1972 to make up for lost performance due to lower
compression. My thoughts...stick with the dual pipe, you'll be glad you
did.
Dave,
San Diego, Ca
1970 RHD PI TR6, CP51649 - a real brumby...
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