On both rotaries and 2-cycles burning into the exhaust usually is quieter (not at peak pressure at port opening) rether than louder. You often get some wild flames out the exhaust on a rotary with a rich mixture.
WRJJRS@aol.com wrote:
In a message dated 3/12/2007 9:49:47 PM Pacific Standard Time,
WRJJRS@aol.com writes:
r Tracy,
When I was actively tuning race cars we had a truism that I often used, "everything changes everything". This was a drastic oversimplification, but none the less was true. If you have an engine running very well, a seemingly minor change WILL change exhaust note or timber. On the dyno you would find some adjustments did little, others a great deal. The fact is as you get the mixture closer to right I am afraid you will hear the exhaust not come back up in volume.
Bill Jepson
OOPS! I meant you WILL hear the exhaust come back up in volume!
Bill
Bill,
The sentence actually makes perfect sense if you add a single "e":
"... you will hear the exhaust note come back up in volume."
On the other hand, I'm surprised that this is the case. I would have
thought that the excess noise might be due to a rich mixture still
burning in the exhaust pipe - but I guess that's really more of a
timing issue.
Dale R.
COZY MkIV #1254