So why wouldnt you just buy a car with the 3.6? It will have the G50 and cooling upgrades, will also have brake upgrades which we havent even discussed... everything you would need on a 3.0 or 3.2 car to turn into a proper 3.6... you can always remove weight cheaper than upgrading all these systems...
A 3.2 SS doesnt add to the cost of a rebuild. If I have to replace the P/C anyway, I am spending the same dollars.
That is not the case with a 3.6 upgrade.
Why would you do this? just a weight issue with the later cars?
Quote:
Originally Posted by longhornchris04
Parroting what's been posted in the engine forum...
The 915 with proper mods (cooling, retainer plate, diff cover if magnesium) should handle 250Hp... but you are pushing it. Having a limited slip is also a good idea, as it will minimize having the transmission load and unload as the traction hits the limit.
Breaking gears is more a question of torque than horsepower. For the sake of example, an engine producing 250Hp at 7000rpm is less likely to break a gear than 250Hp at 5000rpm (numbers from the processes of rectal extraction, don't take literally). So the same 3.2SS with the same Hp as a 3.6 may not be as hard on the transmission. That 250Hp number may have been based on a high revving engine.
I've also read some stuff on people mating a 915 to a turboed VW Type-4 motor. Despite having the same power as a 3.0L, the larger ripple torque of the 4 cylinder had a bad habit of breaking stuff.
Regardless of how you make the power, cooling will be a major issue. If you are going much above 250 I'd consider options for beefier internals. And up goes the cost  |
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83 SC Targa -- 3.2SS, GT2-108 Dougherty Cams, 9.5:1 JE Pistons, Supertec Studs, PMO ITB's, MS2 EFI, SSI's, Recurved Dizzy, MSD, Backdated Dansk Sport Stainless 2 in 1 out, Elephant Polybronze, Turbo Tie Rods, Bilstein HD's, Hollow 21-27 TBs, Optima Redtop 34R, Griffiths-ZIMS AC, Seine Shifter, Elephant Racing Oil Cooling.
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