Nitrous. Biggest shot for a 318

I ran a 150 on a 318 for a few years. There comes a point where you physically can't cram anymore N2O/fuel mix into the engine. One of the car mags did an article that included this phenomena a few years ago (I think it was Car Craft). Basically, a cloud formed over the carburetor because the nitrous was not being pulled into the engine fast enough...it was pretty cool, but the motor went boom soon after.

Anyway, 150 shot with stock everything will work for a little while...not very well, but it will work. Not sure on the longevity either....what I can tell you is the stock 318 heads won't let much in. I swapped from my lightly ported J heads to a set of 302's....both I hit with the 150 shot (this was in Colorado at Bandimere...so the times are SLOW). If I recall correctly, the car ran 14.6 with the 302 heads and 13.9 with the "J" heads. The runs were 1 week apart, about the same bad air...which I found with a nitrous car in Colorado, my car would run the same no matter what as long as I had the same bottle pressure. The car ran high 15's NA....ah yes, those were the BAD old days...lol. :D