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Originally Posted by ScrewDrvr
theres a few 183ci supras running that gt47 88mm..... one of which has made over 1500rwhp  Another just made 850rwhp on pump +meth, on a horrible dyno run @ only 24psi. Both completly street cars that have driven a total of over 20k miles this year. Displacement doesnt seem to be the issue there  |
ScrewDrvr, with meth and pump gas you have the equivalent of race fuel, so thats not really a good comparison. Now do it on 93 alone on the dyno and then slap it on the street with a real load...then were talking something impressive. I own a Supra and I know the tricks to good dyno #'s. You can lean them out nicely to make some good #'s, but on the street with that tune and a real load the engine won't last long. Also 1500rwhp, I guess you are refering to Marko's car. On boost alone he didn't make 1500rwhp.
As for others, yes bore size will make a big difference as will dwell time and rod length. Cam specs also play a huge role, and its something the Viper crowd has yet to mess with. Once again headflow is the name of the game. With a N/A setup port velocity and very important for driveability and piston draw. But on a FI setup you want those runners to allow as much air as possible in with every stroke of the piston. I think the Viper crowd still has a long way to go. Most of the vipers are making around 2.5 to 2.8 hp per CI. Thats decent but nowhere near where it could be. The high flowing headed SBC's are making 3.5 and even 4 hp per ci. Of course it all comes from head flow. I think in the furture things will change somewhat. Just takes time.
Paolo, our kit will take up to Twin 76GTS (2200HP)
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[image]http://forcedinductions.com/images/Vipertwins20.jpg[/image]