anyone know how much BHP you lose through the gearbox on a cvh lump?

 

anyone

 

guessing about 35bhp - i wait to be corrected

 

Depends on the car 30 - 40 hp roughly

 

was thinking that sort of thing myself, a mate said 25, seemed a bit low number to me, what sort of bhp at the wheels would be a good number for my festa rs turbo? its not standard, got a 195 chip in ( might be playing up) and all the shit you need with a 195 plus a pace intercooler

 

25bhp on my old gearbox (before it smashed itself to pieces) well, actually 25.7

 

seems to be differnt sort of figures here, does it depend on the car/gearbox or can all be different?

 

i was al;ways told it was about 10% of the flywheel fig for a FWD car......

 

Get the power at the wheels figure , divide by 0.90, + 10 HP and you should roughly have the BHP figure. Any more loss than this is either a problem with the transmission, lack of traction or just plain lies.

 

An RS Turbo transmission loses around 30bhp. This varies depending on the ambient temperature, the type/temperature of the tyres, the temperature of the gearbox oil (the transmission loss will decrease with back-to-back runs) and whether the Rolling Road operator wants to inflate the Flywheel figure by tweaking the footbrake on the coast-down.

Hope this helps.

IMO this figure shouldn't change as the horsepower increases, because the car still has the same drivetrain, regardless of the horsepower.

 

it all helps to me people, thanks for your help so far