Thread: The Best Crate?

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The cam makes power in a window of operation of about 3,500 rpm's. For instance, depending on the grind, it might make power from idle to 4,200 or 1,500 to 5,000 or 2,000 to 5,500 or 2,500 to 6,000 or 3000 to 6,500 or 3,500 to 7,000 or whatever ad infinitum. So, if you plan to buzz the motor to 7,000 for instance, then you should make allowance for a loose converter to get the motor up to and past the 3,500 rpm lower limit where it starts making power.

The next time you go to the drags, pay attention to some of the cars at the starting line, listen to the revs of the motor before they launch. They're using long cams to make power up high, so they also use a very loose converter to get the motor "up on the cam" before launch.

Any of you guys out there with a stock converter and a numerically low gear, for instance the 2.73 that was mentioned, have absolutely no business with a cam other than stock. Remember kids, it's all in the combination. Everything must be chosen to work together as a unit toward the same goal.

Originally posted by techinspector1
Why do you want more compression? This motor is within 1/2 point of the limit for pump gas with iron heads anyway (9:1).

Shawn, it's all a matter of value for the money with me and I see a lot of value in this motor for the money. You can spend as much or as little as you want on a motor. You know that from hanging around here for as long as you have.

I agree.
The crate in my ride is 9:1 with 64cc heads(iron) and it is very sensitive to octane rating. If I dont run at least 93, it pings and rattles and runs hot. Some brands of 93 just dont cut it and I add octane boost to eliminate the rattles. I would heed the warning from techinspector on the compression.

also with the 8:1, it would allow the use of a blower with a good amount of boost, if that much extra power was ever needed.

Heh no blower on this truck. Too much gas and problems then. My father said he say this crate motor for 800 bucks... Someone told him about it this weekend. $800 is cheap! Maybe if we DO find it for 800 I will buy two of them... One for the truck, the other for the 48. The 48 I am thinking of putting a blower on it... Not sure. But yeah thanks guys.