Originally posted by Kershaw
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M20 power loss over time
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Originally posted by packratbimmer View PostIf you are running the original 2.79 or 2.93 diff, the light flywheel might have caused a loss in low end torque needed to run those gears. Maybe try a 3.25 or 3.46. Lightening the flywheel will make an eta rev quicker, but there is no high end to rev to with the 4.5K rev limit.
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Tried changing out the AFM with a known good one, still had the issue. Installed a high pressure in line fuel pump again and still no improvement. Checked fuel pressure, it's going from 31 idle to 36 WOT so no issue there. Next thing to do is remove the cat and see what happens with that. Anyone have other ideas?
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ignition components? any signs of missfire? injectors old/refurbed are you getting fuel flow as per bentley??89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Originally posted by digger View Postignition components? any signs of missfire? injectors old/refurbed are you getting fuel flow as per bentley??
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I hate to be a buzzkill, but your light flywheel probably wants to make its magic just when you hit the rev limit. An eta makes its torque with a long stroke, restricted exhaust and a heavy flywheel. After the 325i came out the gearing changed to 3.73 for a reason. How light did you go? Its something to be open minded about anyway. Maybe you were losing power from a bad tune and now you would have your power back if you added the torque back into the equation.
A chip might solve the problem - know anyone to borrow one from.
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Originally posted by packratbimmer View PostI hate to be a buzzkill, but your light flywheel probably wants to make its magic just when you hit the rev limit. An eta makes its torque with a long stroke, restricted exhaust and a heavy flywheel. After the 325i came out the gearing changed to 3.73 for a reason. How light did you go? Its something to be open minded about anyway. Maybe you were losing power from a bad tune and now you would have your power back if you added the torque back into the equation.
A chip might solve the problem - know anyone to borrow one from.
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I can't really tell the power loss by driving the car anymore since I daily it and am used to it now. How I tell is by trying to do a standstill burnout. Even when it's wet out the car will just die out instead of holding the rev's. When I first got the car it would bounce off rev limiter no issue in a standstill. It isn't an issue that just happened overnight, it's definitely over a period of time, I have a couple videos where it would just bounce off the limiter and spin tires no issues, then a video where it took a couple seconds for the rev's to build back up then it would stay around 4K but wouldn't rev up the rest, now it'll just drop revs from where I release the clutch at.
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