97Z28SS

iTrader: (5)

Just trying to figure out what the combo I have in mind will produce, 11.8:1 static cr, 6" 4340 rods, 4340 3.75" crank, ported stock head (such as a AI200) ported stock intake and a GM 847 cam with long tubes and an M6.

RamAir95TA

iTrader: (2)

If I had to guess, I'd put you anywhere between 360whp and 430whp. No one can tell you for sure until you have it dyno-tuned (which you should do anyway).

myltwon

iTrader: (1)

^+1, also whoever ports your heads get a flowsheet and contact a custom cam grinder (AI, LE, etc) and have them spec you a cam. I cam should reflect a combo, a combo should not reflect a cam. especially with a higher compression build you'll want a cam that will help keep your dynamic compression in a safe zone

za355tx

iTrader: (108)

If you're going with a good set of ported heads and want to maximize power I'd definitely spend the few extra bucks to get a custom cam for your specific application. There are some good off the shelf cams but custom is the best way to go. It'll be worth it for not that much more money.

myltwon

iTrader: (1)

custom isn't even much more expensive either

300 shipped for LE cam vs 260~ + shipping for off the shelf

97Z28SS

iTrader: (5)

Well I got a really good deal on the 847 cam for $180 so I'm going to run with that for now and I'm going to do the 383 with the parts I have now then in a year or two get an SHP block and some really good aftermarket heads and build a 414" or 421" LT1 with a custom cam.

ss.slp.ls1

iTrader: (36)

I don't see anything wrong with that. With good flowing heads (quality port job), a quality valve train, and a block that can regularly spin to 6800 rpm or higher, you should be in the 400's rwhp. That would probably put you right around ~500 whp.

Bersaglieri

iTrader: (13)

I remember seeing a dyno for a LE2 heads and a GM847, it was 440rwhp. That's the highest I've seen from that setup. Although it's not the norm, I'd expect 400-420rwhp with a good tuner.

-Dustin-

z28rob18

iTrader: (7)

i had tea spec out my cam with my heads and i believe the cam was 260 around that. and im real happy with the work they did on the heads (aftermarket) i reccomend them

97Z28SS

iTrader: (5)

420 - 430 rwhp is what I'm hoping for that should put my car in the low to mid 11's with traction.

LT4POWR

440rwhp if everything is max'd out

WS Sick

I had that cam with some off the shelf AFR 190s in my old 383 (9.5 :1 compression) , and it ran very well, it trapped in the 118 to 121 (highest) trap speed and with stickies in a fully loaded 97 WS6 it ran mid low 11s consistantly. My average times were 11.5s, touched below that a few tenths a few times, I'll have to get my time slips to remember exactly, but it was a very nice combo.

I now have a custom cam with the same heads massaged slightly with 2.05 intake valves and 11:1 compression in the same car. The only real difference I feel between the two motors is throttle responce and much much more low end torque. I hope to have it to the track before christmas...lol, but I took it apart again to work on some suspension junk (parts failures) and odds and end house cleaning.

97Z28SS

iTrader: (5)

Thanks guys that's kinda what I was hoping for, I guess it all depends on the heads but a 420 -440 rwhp na motor for low 11's then hit it occassionally with a 150 shot for mid - high 9's or low 10's is plenty fast for me for now.
And as I said thanks to the release of the SHP big bore block I have all of the other parts to build a 414 or 421 LT1, Cola 4340 3.875 crank, Callies Pro I beam 5.85 rods and Ross 2618 forged 4.155 pistons. I'll get a really good set of heads and a custom cam and run 10's on motor and maybe low 9's on spray or maybe turbo it.