hey all,
When accelerating I find that my car seems to go faster when only using, say 75% throttle, but this only really seems to happen on cold nights.
During the day when it isn't too cold, I can use 100% throttle and car feels really fast, but on a cold night, use 100% and it seems to get a flat spot over 4000rpm.
I think it may be due to a boost spike (bleed valve) which I have noticed on cold nights, but I thought a spike wouldn't really rob power cos it only happens on a cold night when there shouldn't be any knocking (cold air), will the ecu retard timing based on boost alone or on the knock sensor?
I don't want to reduce my boost because it goes fine during a warmer day, and pls don't just say "go buy an EBC"!
Has anyone experienced this? Can anyone shed some light?