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the incredible shrinking megaphone
Posted: September 26th, 2011, 9:45 pm
by jmattox
110 octane leaded fuel, midrange carb and manifold, autowerks engine, Daytona, EGT reading under 1400@wot @6100 rpm (I think). Exhaust megaphone ended up about 4 inches shorter than it was and appeared "burnt." Any suggestions would be appreciated.
John
Viusta Bushwacker w/autowerks engine
CFR FV42
Re: the incredible shrinking megaphone
Posted: September 26th, 2011, 10:41 pm
by SR Racing
jmattox wrote:Exhaust megaphone ended up about 4 inches shorter than it was and appeared "burnt."
You burnt 4 inches off the exhaust megaphone? !!!!
No way would an EGT of 1400 burn off the exhaust megaphone. When you say "burnt". Black, Brown, Gray ?
Re: the incredible shrinking megaphone
Posted: September 27th, 2011, 10:13 pm
by jmattox
Definitely NOT black or brown. Appears gray.
John
Re: the incredible shrinking megaphone
Posted: September 28th, 2011, 9:50 am
by SR Racing
A medium shade of gray would indicate that your EGT's (and mixtures) are close. I have no idea what would have caused your megaphone loss. Just fatigue I would assume. Make sure that the last support is as close to the end of the pipe as you can get it. If it is catileverd out to far the vibrations will break it.