I'm really not trying to debate you, and I'm not trying to start a flame war here, but I don't think you understand what it really takes to build a fast Mustang. In MOST drag oriented Mustangs, 600 rwhp would put that car in the 9's. I'm not really leaving this open for debate, because I've built several of these cars. I've been around Mustangs since 1989. Now, if it's NOT a drag oriented car then it wouldn't even come close to the 9's with 600 rwhp, but still, it would be very fast on highway.In the orignal message in this post he mentioned that it was probably a 9 sec car. And, after seeing many sport bikes in the 8's and 9's last weekend, that car he raced must've at least been pushing 800whp. Like you said, with 900whp 9's would be easy, but not 600whp.
Now that being said, at 3600 lbs, it's VERY unlikely that any Mustang with 600 rwhp will run 9's. If it were in the range of 3000 to 3200 lbs then it would be very possible and pretty likely. It's very easy to get a Mustang near 3200 lbs with driver. My 1988 coupe, with a 10 pt NHRA cert cage and all safety equipment to be legal for 9.99-7.50 ET's, weighs about 2800 with me in it. Of course the newer cars are heavier, but still, 3000-3200 lbs with driver is not unreasonable.
You guys are making alot of assumptions based on virtually no information. I am only looking at this from the standpoint of prior experience. I will practically gaurantee you that the car in question is not making 800 rwhp.
Now, I also am leaning towards the opinion that the guy in the Cobra was full of it regarding his mods, unless the original poster looked in the engine bay and confirmed what he was told. I'm NOT calling BS on the original poster, I'm only saying that if the original poster didn't see the engine bay, then the Mustang driver was probably full of it. Here is why I think the Mustang driver was full of it:
1) that year Cobra would have a DOHC 4.6L mod motor in it, and nobody makes aftermarket heads or intake for that engine, except Ford. And Ford's parts are not yet available to the general public. Unless he swapped in a windsor based engine, which is very unlikely, he would not have aftermarket intake/heads.guy was in a hurry to get back home so I got a brief description of his modifications. Twin Turbo with a IC system and aftermarket heads cams, and much more.
2) Nobody makes a twin turbo kit for those cars yet, unless he has:
a) one of Incon Systems's pre-production turbo kits which were released prior to Incon leaving the country while simultaneously stealing everyone's money
b) one of Turbo Driven Concept's kits, however, TDC only makes a single turbo kit for the mod motor, and they haven't shipped any Cobra kits yet, only GT kits.
c) a homemade kit, which is unlikely, although possible, or a 5.0 engine swap with a 5.0 twin turbo kit.
It very well could have been a built DOHC engine with a centrifugal supercharger and an intercooler. That setup would make 600 rwhp pretty easily even with stock cams.