Quote Originally Posted by LT1UltraZ
well let me enlighten you...NITROUS doesnt need low compression as it COOLS THE INTAKE CHARGE...so sky high compression and nitrous is perfectly FINE.....as far as porting the heads...LS1 heads stock flow really well and i guess he didnt want to spend a lot of money on gaining 10-20hp that you get from porting the stock heads...hope it makes more sense to you now.
If stock ls1 heads flow so well, why do I see people picking up 30+ whp by CNC'ing stock heads? Anway, its moot for us to speculate on why people do the things they do.
Oh, here is an excerpt from NOS's website:

Q: Can high compression engines utilize nitrous oxide?

A: Absolutely. High or low compression ratios can work quite suitably with nitrous oxide provided the proper balance of nitrous and fuel enrichment is maintained. NOS kits are used in applications from relatively low compression stock type motors to Pro-Modifieds, which often exceed 15 to 1. Generally, the higher the compression ratio, the more ignition retard, as well as higher octane fuel, is required. For more specific information talk to one of our technicians.

I took the liberty of bolding the part that makes my point. Its all on how the car is setup.
Ive had turbocharged, supercharged and nitrous cars..4, 6 and 8 cyl. I know a little bit about the chemo- and thermodynamics of power adders...I didnt just fall-off the turnip truck like some of the import owners on here.