MustangBatman1

I started with the 75 shot and it's pretty noticeable. Without a bottle warmer you're going to loose pressure fairly quickly, the nitrous operates best at 800+ psi so when you dip below that you're not getting all 75hp, with a bottle warmer it lasts much longer since the nitrous is heated when it gets below a certain psi to ensure the proper amount of pressure.

Twiztga

Update: Spoke w/ Doug he said he will tune them up to a 100 shot w/ stock plugs.

MustangBatman1

you may as well go with the colder plugs for insurance, they're not expensive and they take about a half hour to install