It is all in the tuning. 150 shot sounds like alot for a not nitrous built motor. I am not that familiar with it on tight clearance motors of the import kind but on domestic v8's they set the piston ring gap pretty high. I little more blow by but much saver for the motor. My s14 had a chevy 327 what was gapped for NOS and all it had was 150 shot. I have heard guys with BB chevy's runing 500 shot, but those are dedicated drag cars. I guess it depends on the motor. I talked to a tuner in Ft Worth that recommended only a 50 shot and no more for a stock S10. The owner got bored and put the 100 shot jets in it. He blew his intake through the hood.
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