OK, we all know how easy it is to get 600- 700 HP out of a 4.8 LSx. If one were to put that power into, say, an RX7, or a 300zx, what could be expected for top end? I remember a few years ago HRM said that 600hp was sufficient to push a Camaro to 200mph. Not like I can do this now, but as a mental exercise, what do you guys think? What car might be better for such an exercise? Please, discuss. Yeah, I watched too much Bonneville video on Youtube.
Aero is vastly more important than power in LSR...
Seems to me I remember a Camaro/Firebird lifting off of the salt at around 200+ because the aero wasn't quit right. The other thing you will run into is gearing. It will probably take flight or run out of gear before it runs out of HP. 
OK, of the cars mentioned, which has better aero? I know there are LOTS of tricks to improve it, speaketh to me.
Maroon92 wrote: Aero is vastly more important than weight in LSR...
Fixed
Top speed is almost entirely a function of CdA and power. Rolling resistance is the only area where weight comes in, and its a pretty small factor at 200+mph
And to answer the original question, I don't know but a LSx Z32 would be awesome no matter where it tops out!
And the answer is RX7. 0.29 Cd. Z32 is 0.30 Cd. I'm fairly confident the frontal area on the RX7 would be lower as well.
From the looks I would say 3rd gen RX-7 over the 300. But I know nothing about aero so my thoughts are worthless. Maybe look up the drag coefficient for both.
Also note that with CdA and weight, its pretty easy to figure out how fast you can go with XXXhp.
Neglecting friction top speed is going to be determined by max engine rpm and gearing. so in a perfect world i guess that would be your max speed, but expect it to be much ess in real world
The thing with racing at Bonneville is it's not so much about putting the most HP you can in a given car, but finding a class where you can be competitive with what you have. A friend of mine has a '53 Studebaker with a flathead six that he turbocharged - it's not crazy fast (I think it went around 130mph) but it was enough to set the record for his class.
Weight is very important. Too little weight and the car will spin its wheels. It's much like plowing snow. One can't push more than one weighs.
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