1970 GTO Version 2.0

[andrewb70]

Maybe on that same dyno you can

The LS7 has 50 more cubes and all kinds of exotic parts like titanium rods and valves, bigger ports, dry sump oiling. It is hard to beleive you can just put the cam and intake on the 6.2 liter and be that close. I hope you are though, then I would really be impressed with the ls2 motor.

If the zo6 makes 440 rwhp, that is only like 13% loss. That seems pretty low.

I am not sure what you mean by "same dyno." I ran the RX7 at the drag strip dozens of times. My race weight was about 3000 pounds and I routinely trapped over 125 mph. Punch that into any drag racing calculator and you get about 460 hp. Certainly jives with the chassis dyno numbers.

As for the ls7s, the 505 hp is way underrated. GM Performance parts will be selling a 480 HP version of the LS3 shortly. It is basically an LS3 with the old "hot cam." Its a very mild cam, with more duration but less lift than the LS7 cam. I don't see why my combo would be too far off from that number.

I never really bought into using a percentage to go from flywheel HP to RWHP. It doesn't make sense to me why when an engine makes more power all of a sudden it takes more to drive the drivetrain. I think its more accurate to determine that a particular transmission in a given chassis looses to driveline losses and use that figure. In the end its all academic. The drag strip doesn't lie.



Andrew