I wanna build a motor that would run awesome on the spray. I dont care about the perfomance N/A so nitrous performance is primary.

what is good cylinder compression ratio?
how much flow on the heads?
bigger exhaust lift or bigger intake lift?
big duration or small duration?
3:42 rear ratio or 4:11?
350 or 383 or 400 sbc?
tight stall convertor or loose?

and does nitrous work better on a manual tranny or automatic or it doesnt matter?

just wanna get some of yalls opinions. Any input would be greatly appreciated. thanx

JD

 

Too many questions, not enough info!

Budget, intended use, carb or EFI, etc.? Budget is a biggie. Doesn't sound like you are limited to a certain block, other than a SBC? If money's not an object, start with a Dart or Bowtie block, build as big a displacement as you can, get a nice set of 18 degree or 15 degree heads, etc. You can see where I'm going as I am talking about a $20,000 motor.

Rich Krause

 

ok as for budget. I will use a junkyard block and clean it up. We got plenty of 350 blocks layin around and a 400 here and there. Victor Jr intake, 750 holley double pumper. The internals will be forged. Eagle crank, 6 in' eagle H beam rods, forged pistons.

So all that outta the way I will only need $$$$ for heads, cam, valvetrain. I dont wanna go too outragous, lets say 3k $ budget for that.

I wanna have this setup for weekend street/strip. Im 21 so I dont really care bout streetablilty like emissions or a lumpy idle, but I do want to be able to take it outta town and what not. And I also wanna spray the flip out of it!

 

oh and I gotta ask.

what exactly is degreed on the heads when u say "18 degree heads"?

Is the head slightly tipped downward when mounted onto the block or is it somethin with the valves that are angled?


Alot of questions I know. Just tryin to learn some stuff for future builds. thanx!

 

Well, if you really want to spray a lot you need the L19 rod bolts, the upgraded pins, Hellfire rings, and J/E pistons. The J/E pistons are a little soft for a daily driver, according to some.

What you are pobably forgetting is how much stress a big hit causes on the entire engine. You'll need billet splayed caps, and about $1000 in machine work. Your rotating assembly is about $2,200 from the ebay guys, and with your budget you're using 23* heads. I'd look into a 396" combo, at least 11:1 unless you are willing to run race gas (it's not much more than pump gas these days ) and then I'd aim at 13:1.

For heads I'd suggest factory CNC AFR 220s and you'll want to have somebody who really knows what they're doing design the cam. I'd talk to Phil (Ai) from the board- sharp guy.

If you don't already have the carb, I'd go bigger than a 750- if you can stand lousy mileage the motor will definately use it. You should be thinking of a total bill in the $4k range for the long block.