the engine is a early 70s 400 sbc 509 casting .30 over
with rhs 64cc vortec heads with 170cc runners
cam lifters rods pistons from a summit kit saying this engine should build 350-375 horsepower (with everything else stock)
cam has hydraulic lifters with roller rockers on top the heads
offenhauser intake i believe is a single plane
10.5-1 compression ratio
and looking to run nitrous does all this seem to be able to hold a 150 shot for weekly drag and occasional driving
also cfm carb should i use for this setup thinking with the nos a 750 or 800?
85 buick regal considerably stripped out is going to be the recipient
You can contact various nitrous company`s that will tell you how high you can go. with a dome hyper piston on race fuel I wouldn`t go over a 100 horse shot. Make sure you have a top notch ignition system from the point of ignition to the plus. Nitrous hit`s the intake at minus 128 degrees so a hotter spark is recommended. You`ll also have to retard the timing slightly with nitrous use.
For every 100hp start with 2 heat range colder plugs not hotter or you'll have detonation problems plus you'll need to go 2 degrees less timing and learn about reading the plugs, the nitrous directions should tell you this. It's wise to be conservative on your tune 1st time out.
domes? Reverse domes right? otherwise your compression is WAY too high. What are the cam specs? at 10.5:1 you're going to need a healthy sized cam. Heads are too small for that compression and displacement.
Am I going to run into problems with harmonics in my vortec 406 :sweat: ? Internaly balanced crank,Its at the machine shop now having the rotating assembly balanced :sweat: .
Shane
Am I going to run into problems with harmonics in my vortec 406 :sweat: ? Internaly balanced crank,Its at the machine shop now having the rotating assembly balanced :sweat: .
Shane
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