what do you think abot nitrous on a 13:1 351w

[Dark_5.0]

If you have a zero decked your block and have perfectly flat pistons that dont lose andy cc's from valve notching you would have 12.5 to 1 compression.

If you have stock pistons and havent zero decked your block your compression would be significantly lower.

[antyates]

My engine is a 1969 351W. It has a 4-inch bore, .040 over. Pistons are flattop-decking 0. Heads are 1965 289’s. They have 54cc combustion chambers. They have been planed .020. They have 1.9 Intake valves and 1.5 inch exhaust valves. They have also had extensive exhaust porting. The intake ports have been port matched. They have 1.6 roller rockers. Intake Manifold is a single planed Ford Motorsport.