Quote:

---

Quote:

---

Quote:

---

Monte,
Knowing that all combos will be different...What is your preferred comp ratio and quench if you don't mind saying...Thanks Gary !

---

Many factors come into play on that Gary, but assuming we are building an "all out" nitrous motor, that will see in excess of 600hp for a small block or 800+ on a big block, I do have some numbers I shoot for. I don't like more than 13.5 or so on compression for any combo. Chad's 632 only has 12.2 and runs like a raped ape on the spray, but a little more would probably help it. The 738 is close to 14.1..............Quench is tricky, because the head comes into play, but on most small blocks I will want .080 at an absolute min, but prefer closer to .100. Most 600" or so big motors in the .100 range and our 738 has .140. More stroke, usually means you need more quench distance to make it happy. As far as camshafts go.......Billy said smaller, that is NOT the way I go. Most of the nitrous motors I do have absolute MONSTER camshafts in them. To use a lot of nitrous, you have to get it in and out of the motor, hence I do some big stuff. I have small block cams approaching an inch of lift and many BB cams over that by a good bit. LOTS of duration at .050 and wide LSA numbers. The CAMSHAFT is where 9 of 10 guys miss the setup on a nitrous motor

Monte

---

Thanks Monte,for the tip on the camshaft.While I am new to NOS and still trying to learn it make sense to use an even bigger camshaft.There are some people around here(Pro Mod Racers) that build
some killer NOS engines but they go smaller/milder on the camshafts.
And they will sell you a camshaft but can bet they will share only the basics must know info. with the camshafts.But I do know they are a little milder/smaller in lift & duration.

All of us Mopar Racers need to Stop being so hard headed all of the time and pay more attention to whats being said and we just might learn something not only new but helpful.

If its something somebody is quoting from a article some where I pay very little attention to it,but if its something they have done and it works on the Drag Strip believe it or not I pay attention!

PS Speaking of article/books if someone knows of a book you can buy to study/learn about Dyno's please let me know.We buy some Big High $$$ engines some times at a reasonable price and most have their own Dyno's and are willing to show you on the Dyno their engines back up their Horse-Power claims.And I would like to be able to tell if they were set up in a "Happy" dyno mode. Dyno operators are the only people I know that try to be more secretive than Grudge Racers!

---