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Jeff Stout · 03-03-2021, 11:34 PM

I run 250 on a plate , but Im SBC. 12.5 compression. I feel you need more then 7 degrees timing out. Cold spark plug, maybe retard cam to reduce cylinder pressure. Plug reading is critical. I would start with 100 shot. That is pretty safe and find which cylinder der gives you leanest spark plug reading. All these things I do as my motor is aN/A motor and I have to be careful of torching head gasket in which I have done twice, but now comfortable with spraying 250. My gain is 1.1 second. It's a hoot to use.

03-03-2021, 11:34 PM	#2
Jeff Stout VIP Member Join Date: Dec 2001 Location: phoenix Posts: 1,410 Likes: 53 Liked 655 Times in 255 Posts	Re: Finalizing my nitrous setup I run 250 on a plate , but Im SBC. 12.5 compression. I feel you need more then 7 degrees timing out. Cold spark plug, maybe retard cam to reduce cylinder pressure. Plug reading is critical. I would start with 100 shot. That is pretty safe and find which cylinder der gives you leanest spark plug reading. All these things I do as my motor is aN/A motor and I have to be careful of torching head gasket in which I have done twice, but now comfortable with spraying 250. My gain is 1.1 second. It's a hoot to use.