Calculated crank power

[fassi1]

Hi
What would be calculated crank power for remaped S60 2.4LPT auto if wheel power is
before remap 155hp
after remap 200hp
Cheers

[claymore]

Using this site 239bhp

http://www.mk5cortinaestate.co.uk/calculator4.php

[jamesy12345]

Hi
What would be calculated crank power for remaped S60 2.4LPT auto if wheel power is
before remap 155hp
after remap 200hp
Cheers

Try this online calculator, it's only approximate though....as are the dynos calculating crank power from wheels!

http://www.mk5cortinaestate.co.uk/calculator4.php

[jamesy12345]

Using this site 239bhp

http://www.mk5cortinaestate.co.uk/calculator4.php

I'm too slow as usual

[M-R-P]

It's usually 10-20% for the M56 box, so on 200 whp it would be around 220-224 bhp.

[T5frankie]

It's 25 bhp

[jamesy12345]

It's usually 10-20% for the M56 box, so on 200 whp it would be around 220-224 bhp.

It's 25 bhp

OP says it's an auto

[M-R-P]

Bloodyautomaticthinksitknowsbetterthanwedorubbish. ..

[stribo]

Losses through the auto box are approx 50 bhp.

[T5frankie]

Losses through the auto box are approx 50 bhp.

How's that? An auto is just as quick as a manual once rolling

[Wobbly Dave]

It is impossible to know what the crank power is on automatic without taking the engine out, removing the torque converter & sticking it on a bench dyno. I can explain further if you wish?

Any thing to do with sticking your wet finger in the air will be as accurate as the web sites. including steve's 50 hp figure above. It's a guess.

My advice is embrace your WHP figure and be happy.

Minimise your measurement variables by baselining on the same dyno and sticking with that dyno on every change you make.

[stribo]

How's that? An auto is just as quick as a manual once rolling

Because an auto 'box has higher internal drag, ir also has the transmission pump which takes engine power. I've heard later Jag auto boxes have transmission losses of around 80bhp.

[LiamT4]

It is impossible to know what the crank power is on automatic without taking the engine out, removing the torque converter & sticking it on a bench dyno.

This^^^^

Also, autos do have higher losses than manuals. This is why the early v70r awd autos are so slow. Heavy, with the autobox AND the awd system sapping the power.

[stribo]

It is impossible to know what the crank power is on automatic without taking the engine out, removing the torque converter & sticking it on a bench dyno. I can explain further if you wish?

Any thing to do with sticking your wet finger in the air will be as accurate as the web sites. including steve's 50 hp figure above. It's a guess.

My advice is embrace your WHP figure and be happy.

Minimise your measurement variables by baselining on the same dyno and sticking with that dyno on every change you make.

Yes it was a figure that wasn't accurate, but an educated guess.

[fassi1]

Thanks for all the answers. It's all clear now.

[jamesy12345]

Thanks for all the answers. It's all clear now.

clear as mud