Thread: I need help

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Originally Posted by camaro76_454

yea i will use nos but not all the time ( only at the track) coz 65% of my time at the track and i dont have a tranny yet and the rear end is a 9" with 4.11 ratio. the PRM range about 2500 -6800 RPM Hyd. Roller and 11 to 1 if i can .
what im looking for is a powerful engine that makes more than 650 horses without NOS and if the tall deck is the way to go i dont mind, i can get a 572ci from World Products coz im thinking of getting one of their blocks or anywhere else . So what u think?

On any of the low deck BBC that run on pump gas I would try to keep the port volume at 325 cc's or less to keep some of your port velocity.
If you are going to go low deck build a 565.
If you are going to run a 10.20 block build a 598.
The 632 will cost you some more money to build.
The biggest problem problem with the 598/632 is if you run a 24* head you will have to look at some good heads.
On the 598's in street car's we have run the Brodix BB-2 Xtra's that have been CNC'D with really good luck.
I would not run a hyd. roller cam in a 598 I would run a mech. roller.
The hyd. really become to mild in a big cube engine.
In a 565 with the 11. to 1 comp. ratio I would look at some of the largest hyd. cam's out there.
Keep in mind that the power bands are based on a 454 and not a 565.
I have used Crane part number 139661 in a 565.
The specs. are .632/.632 duration at .050 is 256/264 the cam is cut on a 114 l/s.
The heads are the 325 cc Dart's with some port work done to them.
The intake is a Victor with a 1 inch spacer and a flowed 1050 Dom.
This engine with a 250 shot of N20 works great.