Re: 460 Twin turbo advice
Quote:
Originally posted by Chudik
460 Twin turbo around 600- 800 HP
I have C9VE-B block and D3VE-A2A heads
What piston do I need in order to maintain low compression 9.0:1 or 9.5:1 for a turbo setup
I'm going to do some porting on the heads and intake
What you think about this setup, I'm gong to use 2 H1C turbos, same as a HX35 form a Dodge 5.9
With that block and those heads, flat-top pistons will get you at about 9.5:1 compression ratio.
I am not up on turbos but generally speaking, I think that's a bit more than usual compression for a turbo engine if you wish to run a lot of boost. It is my understanding that you'd be better off running less compression with more boost (as opposed to more compression with less boost). With too high compression, just a little boost can burn up your motor. Since you want as much as 800HP, I'd say lower your compression ratio and use more boost to get there. For example, the TRW L2404's have a 22cc dish and this would give your combo a 8.25-8.4:1 compression ratio.
The heads you intend to use can be made to work well with the proper porting. In fact, a friend of mine is running a twin turbo 460 with D3VE heads and it goes like a bat out of hell. Keep in mind, however, that the D3VE exhaust port is very restrictive for your application and needs a lot of work, because the exhaust gasses are a critical part of turbocharging and must reach the vanes ASAP to expand there and not beforehand in the, well, most convoluted production exhaust port ever offered in the 429/460 engine family. Free up that exhaust flow.
Also, be thinking about some damn good, name brand H-Beam rods and other bottom end strengthening hardware.
Paul