nos on a 318

well, nitrous is a touchy subject to some people.... it all just depends on the motors condition, how much of a shot, and the tuning. theres the foolish out there who swear nitrous will grenade a motor unless you have forged pistons, good headbolts, good rod bolts, etc. which all of those do help on a motor, but if done right a 125 shot will work great on stock or mild bottom ends.

i have seen several ( and owned one) stock cast bottom end motors with nitrous run good, and be reliable. a few years back a buddy of mine bought a chevy malibu, with a other wise stock 350. upon tearing it apart for some inspection it was .30 over, 8:1 cast piston, stock 1.88 heads, .450 ish lift lunati cam, dual plane intake, 600 holley and it managed a shitload of nitrous passes. it ran high 8.20s in the 1/8th on a 150 shot of juice. but we knew what we had, the motor looked like it had several thousand miles since its last rebuild, we knew it would be reliable, and somethin fun to put the nitrous kit he had layin around on. that same motor went on to run for a season in my dads nova with a different top end with a 125 shot, and is still running today in my cousins malibu with the same untouched short block (however its only a matter of time before it blows, its startin to smoke a bit) but i couldn't tell you how many passes that motor's got on it lol.

where people screw up and give nitrous a bad name, they wanna put a 150 shot on a old questionable motor, most of the time its the tuning that causes it to blow, not all the time tho... if it were me, and i knew what i had, ( a decently fresh bottom end, and decent overall motor) i'd slap a 125 kit on a stock cast piston motor in a heartbeat. and i know a good mopar motor will take it cuz those blocks are motors are tuff. everything was touched on the 350 too as far as tuning goes, timing set back a couple "extra" deg. just to be safe, colder plugs, fuel pressure safety switch, good fuel pump.. etc. safe tuning, and a reliable size shot is the life of nitrous.

i would look into sumthin like a nos power shot kit its fairly cheap and its a straight 125 shot ( thats the only jets it comes with) .. plus if you don't have any of the other jets on hand you won't be as tempted to put on a bigger shot right away lol.