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Dyno Hlep

1K views 28 replies 11 participants last post by  shifty35 
#1 ·

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#4 ·
eventually, only have HW (speed limit of 50). Need flat and nice Interstate to do it in higher gear. 2nd gear top speed is 57mph, 3rd is 80 mph.
 
#8 ·
i am confused as to how you did this with out a dyno or anything.
 
#9 ·
As engineer, I love Science. I speed as well. Not in a miata anyways, its gets shaky around 80 mph, rear has no traction, started drifting in high speed turn, off camber area. I cruise around 75mph in a miata. in 3rd, it tops off at 80 mph, and I dont have highways to do a pull in 3rd.

as how to do it without dyno: F=m*a, I measured a, and m, got F, so that's torque, then derived Rpm from alternator wafe form, by measuring the voltage precisely over a certain time period.
Sinca car is moving, I also measured how fast the car is decelerating, that a was added to a from the pull. rest is math.
 
#16 ·
+1 except I've always been more of a Piccolo fan :mrgreen:

I dyno'd my car (same model with catback and intake) in 3rd gear and got an avg of 139whp. Didn't find out til after that the ideal gear to dyno it in is 4th to get accurate numbers...
 
#29 ·
Every G-Force unit, iPod dyno software, all that crap can do the same thing, so don't worry, the market is saturated.

Will it get you a ballpark figure if you get it dialed in? Sure.

Useful tuning tool? Hell to the no.
 
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