Can someone with knowledge of dyno charts read any more into this?
Dyno run
Moderator: martauto
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Cloggy Saint
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Decided to put my car on the rollers today more out of curiosity than anything. 159hp is more than I expected but less than I hoped for! On the plus side the torque value is somehow higher than factory spec. The tester said it's running lean up to the point where the graph dips and from there on it runs too rich. He also plugged into the diagnostic socket which returned fault codes 1, 29 and 50 but he wasn't really sure what this meant! I didn't think E30s returned any diagnostic info ...?
Can someone with knowledge of dyno charts read any more into this?
Can someone with knowledge of dyno charts read any more into this?
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clipper
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Is the dyno chart showing the actual measured power at the rollers, or a "calculated" engine output at the crank?
If the first, I'd be pretty happy with that considering the transmision losses you would normally expect.
If the first, I'd be pretty happy with that considering the transmision losses you would normally expect.
These are sensations as hard to forget as they are to ignore.....
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Cloggy Saint
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I'm not sure. Let's go for the first one.
edit: confirmed as power at the wheels.
edit: confirmed as power at the wheels.
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martauto
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How old is the engine ?
Mart.
Mart.
Only the E46 cab left now.
Just got too old.
Just got too old.
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Cloggy Saint
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It came from a 1990 auto and has covered 116k.
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martauto
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Well I would be really pleased with that .
That's a good amount of torque as well !!
Mart.
That's a good amount of torque as well !!
Mart.
Only the E46 cab left now.
Just got too old.
Just got too old.
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Cloggy Saint
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I'm not overly disappointed but it would have been nice to have one more hp, 160 sounds so much better than 159!
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clipper
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Yours is a standard M20 B25 right?Cloggy Saint wrote:I'm not sure. Let's go for the first one.
edit: confirmed as power at the wheels.
Assuming a 15% loss through the drive train (which seems to be a reasonable estimate for a RWD car), your engine seems to be putting out around 187 bhp....
Either an "optimistic" dyno, or an exceptionally well kept engine and transmission...
I would ask the dynoman if he has any charts for other M20 B25 cars to compare because the absolute values look a bit off to me.
These are sensations as hard to forget as they are to ignore.....
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Cloggy Saint
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It's all standard apart from a Speedtouch chip. It may be an optimistic dyno but it's definitely a well cared for engine.
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reggid
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its not rwhp it is at the engine based on the numbers, looks ok except for 4500-5100
E30 325is with M20B31
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Cloggy Saint
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Yep, it was measured at the flywheel, my bad.
E30 zone - promoting adult illiteracy since 2004