Hi All!
11-02-2010, 12:40 PM
#41
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OP, study more and post less. You have much to learn before making a single assertion. Remember, not one person here knew how little you understood before you made your first post. You reveal more with every post so please stop, for your sake. The next time you have an idea, just let it go. We don't need to know about it.
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11-02-2010, 03:34 PM
#49
Originally Posted by 18psi
There is no set number, but 15-20% about right.
Originally Posted by 18psi
Not variable on power level
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11-02-2010, 03:52 PM
#50
I have. And conventional wisdom is that a Miata with stock drive train will loose about 25hp at PEAK HP. This is backed up with dyno testing. This is true at either stockish HP or 250whp. Obviously I'm not talking about any driveline in any car, just a Miata.
So what is the 15-20% of?
So what is the 15-20% of?
Post up results of a 250rwhp dyno at the rear wheels.
Then take that engine out of the car, remove the transmission, and post up the results of the same 250rwhp car at the crank.
Do the same thing with a stock car, and post up those results too.
When the drop from car A to car B is a constant at peak HP, then you can tell us how wrong we are.
Professional motorsports still begs to differ.
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11-02-2010, 04:03 PM
#52
I have. And conventional wisdom is that a Miata with stock drive train will loose about 25hp at PEAK HP. This is backed up with dyno testing. This is true at either stockish HP or 250whp. Obviously I'm not talking about any driveline in any car, just a Miata.
So what is the 15-20% of?
So what is the 15-20% of?
Its a variable percentage because all miatas are not exactly the same and all don't have EXACTLY the same drive train loss. different transmissions, different rear ends, different rotational mass etc etc etc differences in the drivetrain will dictate how much percentage of the peak engine output the car will lose.
if you dyno two miatas with same engine power output but different drivetrains then swap the two engines they will NOT put down EXACTLY the same power.
That is called drivetrain loss.
now **** off
You just changed your argument.
Post up results of a 250rwhp dyno at the rear wheels.
Then take that engine out of the car, remove the transmission, and post up the results of the same 250rwhp car at the crank.
Do the same thing with a stock car, and post up those results too.
When the drop from car A to car B is a constant at peak HP, then you can tell us how wrong we are.
Professional motorsports still begs to differ.
Post up results of a 250rwhp dyno at the rear wheels.
Then take that engine out of the car, remove the transmission, and post up the results of the same 250rwhp car at the crank.
Do the same thing with a stock car, and post up those results too.
When the drop from car A to car B is a constant at peak HP, then you can tell us how wrong we are.
Professional motorsports still begs to differ.
And again you worded it better than me. Thank you
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11-02-2010, 04:05 PM
#53
You just changed your argument.
Post up results of a 250rwhp dyno at the rear wheels.
Then take that engine out of the car, remove the transmission, and post up the results of the same 250rwhp car at the crank.
Do the same thing with a stock car, and post up those results too.
When the drop from car A to car B is a constant at peak HP, then you can tell us how wrong we are.
Professional motorsports still begs to differ.
Post up results of a 250rwhp dyno at the rear wheels.
Then take that engine out of the car, remove the transmission, and post up the results of the same 250rwhp car at the crank.
Do the same thing with a stock car, and post up those results too.
When the drop from car A to car B is a constant at peak HP, then you can tell us how wrong we are.
Professional motorsports still begs to differ.
I have not personally done it, but am relying on what has been posted by Randy Stocker and others. 25-26hp was what they found independent of the power the engine makes at peak HP. Not a % of what power the engine makes.
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