To answer the question for Spreadman, if I may......
The difference between 400rwhp and 500rwhp is a pretty big gap. If you're
honestly going to be making towards the high end of that figure, with a Positive Displacement blower like a Twin Screw offered by Kenne Bell, then 3.55's would probably be a better bet for a street/strip car.
Now realistically, most Kenne Bell guys are seeing close to 377-420hp on street gas (2.1L) while still running their stock short block....and that's with modest bolt ons. Not to mention, seeing 500rwhp with a 2.1L without the use of a steady diet of race gas is going to be a stretch, so unless you're honestly planning on sinking a good pile of money into a built short block, as well as ponying up the extra dough for the 2.4L and additional upgrades needed in order to attain that goal (fuel, ignition, hood, etc). I'd realistically stick with the 3.73's. Not to mention, if you plan on drag racing this car, don’t count on the stock 28-spine rear end, or rear
suspension components holding up to too many passes on the strip with that kind of power and torque on tape!
Now, I could be way off base here, but my guess is that you’re overshooting your projected power levels (like 90% of the guys on this board) and probably aren’t, willing to drop (or are aware of) the kind of time and money (you’re looking at $10,000-$15,000 minimum to do it right) you’ll need to put into this car in for it to see and perform properly with 500rwhp under foot. Now….400rwhp….much more doable a lot less expensive and a lot more stock part friendly.
