Originally posted by pantelones
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M20 B3x Naturally Aspirated Stroker build past, present and future
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Originally posted by ForcedFirebird View PostIt's one thing to make power, but through experience, making that power for 12+hr at a time is a different animal. Love my mates down under, still curious though.
I'm curious to see what digger or anyone else with experience has to say. This is method of tuning is not just for reliability concerns, but for scenarios on a race track where you are not operating at full throttle; for instance you have corners that you cannot be completely flat out in, if you "lift" to not hit the car in front of you, or any other scenario that is again, dynamic, and not just a flat out pull.
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i've only every had mine on a eddy current dyno so you can load it up real heavy or really light.
last full tune i had was last year with the first Alpha-n for the dbilas setup. it needed no adjustment whatsoever on the street it was brilliant straight off the bat
sometimes the very light load and throtle transinets need to be done on the street but above this it shouldnt need it unless you are getting some serious ram air89 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 ForcedFirebird View PostWell, how loaded was the dyno? 10% for rolling road?
I don't want to muddy up this thread too much,
Most of my experience is with motorcycles that are AphaN and a Dynojet dyno. I hardly ever loaded the dyno, sometimes drag the brakes to to slow the passing of a cell. All the Ducati sport bikes had functional ram air and even after data logging on the track we hardly ever had AFRs far enough off to warrant a charge.
I am speaking about fuel only here, timing adjustments were left on the known conservative side.
I also don't think interia is superior in any way, just pointing out a skilled operator can do some good work on one.
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Originally posted by digger View Posti've only every had mine on a eddy current dyno so you can load it up real heavy or really light.
Interesting, I didn't even realize how many different types of dynos are out there. I had to search that to understand what you meant. haha They come in both hub and roller, but that type of dyno seems to be the better option regardless of the configuration.
Originally posted by LJ851 View PostAll the Ducati sport bikes had functional ram air and even after data logging on the track we hardly ever had AFRs far enough off to warrant a charge.
I am speaking about fuel only here, timing adjustments were left on the known conservative side.
I also don't think interia is superior in any way, just pointing out a skilled operator can do some good work on one.
And a skilled operator is just that, a skilled operator, ya know? I just thought it would be a good bit of info to know how he is testing the motor since it does make a difference and I'm sure I'm not the only one wondering...
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Originally posted by digger View Posti've only every had mine on a eddy current dyno so you can load it up real heavy or really light.
last full tune i had was last year with the first Alpha-n for the dbilas setup. it needed no adjustment whatsoever on the street it was brilliant straight off the bat
sometimes the very light load and throtle transinets need to be done on the street but above this it shouldnt need it unless you are getting some serious ram air
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Originally posted by pantelones View PostInteresting, I didn't even realize how many different types of dynos are out there. I had to search that to understand what you meant. haha They come in both hub and roller, but that type of dyno seems to be the better option regardless of the configuration.
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hub would be ok for cars that struggle for traction and long tuning sessions. the cost for a power run on a hub type was 2-3 times that for a roller due to the setup so unless you spend alot of time on them....
a hub dyno will produce prettier numbers though....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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suspension is taking precedence ATM89 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 CorvallisBMW View PostWhere'd you get this beauty from?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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