Put my P38 on a rolling road

Hi

I put my 99 'T' reg 2.5 DSE on a rolling road to see what is was outputting. Quite pleased with the results for a 14 year old car

131.2hp @ 4200 RMP
207 lbs/ft torque (about 280 n/m)

The garage said they see results as low as 110 BHP for that aged vehicle

Will probably look at chipping it

what was it when new?

howardo said:

what was it when new?

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136bhp at the flywheel, so if that was at the wheels it must be chipped already.

Datatek said:

136bhp

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thats good then

131.2 engine HP
95.2 wheel HP

so unchipped

alistairhurst said:

131.2 engine HP
95.2 wheel HP

so unchipped

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Interesting, how did they get the engine figure with it in the car? Or did they just do a calculation based on estimated transmission losses.?

haven't got a clue, that's just the info I have off the printout.

Will ask after I have it chipped and tested again

alistairhurst said:

haven't got a clue, that's just the info I have off the printout.

Will ask after I have it chipped and tested again

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Well, if they didn't take the engine out, the engine figure is just a guess and will vary according to the state of the diff's, gearbox etc.

Datatek said:

Well, if they didn't take the engine out, the engine figure is just a guess and will vary according to the state of the diff's, gearbox etc.

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It roughly calculated by the dyno software based on how much faster the undriven rollers slow down compared to if they were unloaded. The faster they slow the more transmission loss is calculated.