Re: no shame in loosing out to a diesel on a 1/4ml drag
Thu, 03 October 2002 13:04
That boost is not a typo. Regularly tractor pulling diesel engines have 10 to 12 bar boost pressures, so 147psi is in the ballpark.
Compresson ratio of various diesels usually lie in the 1:20 neighbourhood. My old VW Golf has a 1:23, newer TDI VW's have 1:19,5.
Competition diesel's have about 1:10 to 1:13. That's why they can run phenomenal boost pressures. When compression cycle is completed, pressure in combustion chamber does not necessarily differ much from normal factory stock pressure levels.
(Well, there always is some safety margin left so tuners usually go past that pressure level anyhow).
In practice anyways it's possible to have terrible boost and engine combustion chamber will not see elevated burning pressures.
Thu, 03 October 2002 13:04
