27/6 installed- dyno pic added
04-25-2004, 02:00 AM
#16
Three Wheelin'
Join Date: Oct 2002
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14.7 is stoichiometric, in reality roughly 14.3. Below that is all rich, ideal power is made around 12.5-13.1. The reason I'd run a 14 in lower RPMs is to help the turbo spool quicker, and then have it taper to a safe rich amount (12-12.5) by redline to prevent detonation, the risks of which increase with RPMs.
04-25-2004, 02:50 AM
#17
Burning Brakes
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yeah but I *think* compression efficiency decreases. Ideal compression is a very slow steady compression. This heats your gas mixture the minimum amount. This is usually referred to as 100% efficient compression. So a 50% efficient compression heats your gas mixture up twice as much as required.
The faster you compress a gas mixture the lower the compression efficiency. So at higher RPM the piston is compressing the mixture faster thus reducing the compression efficiency. This in effect causes the gas to heat up more thus increasing the susceptibility to pre-ignition(detonation).
Just my theory, take it for what it's worth.
John
The faster you compress a gas mixture the lower the compression efficiency. So at higher RPM the piston is compressing the mixture faster thus reducing the compression efficiency. This in effect causes the gas to heat up more thus increasing the susceptibility to pre-ignition(detonation).
Just my theory, take it for what it's worth.
John
04-25-2004, 06:28 AM
#19
Race Director
Detonation is less pronounced at higher rpm... you are right boostguy from my understanding. Not sure th reasoning behind Sams comments... would be interesting to hear.
04-25-2004, 07:05 AM
#20
Burning Brakes
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Originally posted by jorden
hi eclou
i have the same hardware setting like yours
, will run dyno with songzzz two week later
in taiwan, then will offer the result for reference
hi eclou
i have the same hardware setting like yours
, will run dyno with songzzz two week later
in taiwan, then will offer the result for reference
welcome
