Thread: E46 Dyno Thread
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Old 10-21-2013, 09:07 AM   #404
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Join Date: Mar 2005
Location: Columbia, MD
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Originally Posted by SoloII///M View Post
Here's my plot from the dyno tuning session today. We did about four hours of WOT tuning on the dyno (35 runs) and another 4-5 of part-throttle to get the car running right. We were getting a lot of heat soak (I need to make a shield for my intake pipe). I suspect if we had let the car cool we would have seen higher peak numbers, but I don't really care about the absolute numbers.

Peaks of 230whp / 228 wtq

M54B30, 0.030" over, ZHP cams, running Megasquirt and E85 (flex-fuel)
Technik V3 headers into Burns megaphone collector to 3" pipe, two mufflers and a dump before the diff
Decked head
Mild head port blending
M50 throttle body bored to 68mm
Long-tube 3.5" intake, filter in driver's brake duct

There is probably a little to be had between 2,500 and 3,000 RPM but the car is never used down there so we didn't bother spending a lot of time on it.
Looks like we had a boo-boo and the atmospheric correction factors didn't get loaded on any of these dyno runs so this plot is 5-6lb-ft low across the band. Hope to get an updated run sometime next year.

John V
'02 330Ci - Megasquirt 3 tuned by
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