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Old March 24th 2011, 06:35
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evilC evilC is offline
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Quote:
Originally Posted by Bruce. View Post
................The 1303 rally engines had a stock looking t1 exhaust (probably an empty silencer) and produced 125hp from 1600cc.
I remember Peter Noad doing a test on his rally bug back in '70s with various exhaust options but maybe not the extensive range there is now. The overriding recollection was that the standard OG exhaust was remarkably efficient, although it was strangled in standard form by the peashooter tailpipes. Using some tuned tailpipes released a fair amount of hp with the best compromise being some taper tips with 1/2 silencer tubes that only increased the loudness a tad but liberated nearly all the hp.

Having seen the quality of current standard exhaust back boxes I don't think you could rely on the same results. Of course if anyone has an OG exhaust in good condition......

Clive
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