g50 / 915 gearbox

[911nutter]

i'm looking at having a 1973 rsr replica built... some companies i have approached to do this for me are talking of -amongst other things - using the 915 gearbox, some talk of using the g50.

what's the difference, which is more reliable and can anyone offer general advice on having one of these things done?

[turbobloke]

The G50 was a big improvement but it also depends on whether you want to put a later gearbox in an earlier car.

[pottri]

I think the G50 is more reliable and can stand far greater horsepower/torque but could cost an arm and leg to install in an earlier car compared to the good ole trusty 915

[rubystone]

The G50 is stronger - used in Ultimas after all. The 915 was at its limit in the 231 bhp 3.2 but if your RSR replica is to have RSR levels of power it ought to only put out 230bhp as stock IIRC, so a 915 could be just fine. Whatever you stick in it, I'd specify a gearbox oil cooler too (I can't remember whether all G50s have this as standard, later 915s do IIRC)

[iguana]

rubystone said:

if your RSR replica is to have RSR levels of power it ought to only put out 230bhp as stock IIRC

Ruby- you been out freezing your head in the Caterham again

Real '73 RSR = 308bhp, you are thinking of a '74 3.0RS with 230gee gees


Ref the gearbox, I'd far prefer a G50, but if you've not got a donor car sorted its easiest overall to start with a G50'd 3.2, less likey to be rotten & putting a G50 into an early car is not an easy peasy job to do properly.

Tho a decent 915 is not cack, its just a decent G50 is IMHO a much better & far less agricultural & more modern box.

[rubystone]

Never mind that, are you meeting us tomorrow to check out the GT3RS?

You're right though it was the 3.0RS I was thinking of

[iguana]

rubystone said:

are you meeting us tomorrow to check out the GT3RS?

??

[rubystone]

Bit late now - I mailed you in the week. Nice car it was too - the carbon/kevlar bonnet must account for £10k of the price alone! Makes me laugh - carbon kevlar bonnet, stick on Porsche badge, lightweight seats and.....a CD player and storage box!