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Originally Posted by ForcedInduction
0.7-0.9bar or 10.15-13.05psi. Most came from the factory with 7-9psi boost. Why? Reliability, economy, emissions, mistake? Nobody will know why unless we can get one of the builders/engineers to tell us.
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I've got the SD set to 13.5 psi and, my guess is that it's too high.
Why, you say?
I don't think the ALDA has sufficient range to accept 13.5 psi of boost and the engine does not get anymore fuel above.......say.........11 psi or so.
I definitely see a temperature rise on the gauge........everytime I use maximum boost for more than 10 seconds or so. The 617 would never exhibit such behavior........more common to the fussy 603.
So, before I run the a/c for the summer, I'm thinking of dropping it back to 11 psi. I'll do another 0-60 time after I reset it.........it's currently at 12.7.......but........I'll bet that I don't lose any time.
However, the drop of 2.5 psi will definitely cause lower charge temperatures and lessen the rejected heat loading.