Figuring compression ratio ....

Brooks James said
Great question. Depending on configuration , I have enough nitrous Equipment to deliver a 100-300 hp shot. Using the formula 2 degrees retard per 50 hp, A 300 shot would be 18 degree retard. A MSD 8680 dash controlled retard module has a IIRC has a 0-15. Degree .range. With a 200-300 shot cylinder pressure may be enough to cause head gasket sealing issues. The copper ..80 thou gasket is specifically designed for magnums. So...Im hoping to find a happy medium between dumping a lot of timing and/ or keeping compression lower.
Ideas ??

Uh, 300 shot, 12°? Still, when EM blew up their 305 with a 300 shot, Monte Smith said it would have survived if they had taken more timing out.....
If you're willing to run good gas along with the nitrous hit, more compression, meaning more n/a power, will result in more power from a given hit.
Much harder to tune a decent sized shot on pump, than on good gas.