Juiced

iTrader: (2)

chassis is almost done and i have to finalize my engine choice.

What do you guys think will run faster in the 1/4?

15:1 comp 555ci BBC
Solid roller
Pro Systems Carb
Pro-filer Sniper Intake
Ported Brodix PB-2005 heads (570cfm intake/360cfm exhaust)
1.8 ratio PG/chance converter

14:5 comp 408 LS1 (9/16 head studs, 0-ringed deck)
Solid Roller
GMPP ls7 intake accufab/ 2100 cfm TB
Allpro LSW 12* heads Jessel rockers (375cfm intake)
1.8 Ratio PG/chance converter
As much n02 as it will take before lifting the heads.

Tire Will be
275/60/15 ET Street Radial

The class is running 8.1's 165+

68maro

the bbc. what are you limited to for power adders? also if the motor isn't done why limit to 555 and why those heads.

WickEdSix98

iTrader: (4)

Big block definitely. You will need to turn it pretty tight with those heads on that small of a motor.

Juiced

iTrader: (2)

Class max is 555ci.

For Big Blocks larger than 500ci their are no Power Adders Allowed,
BB smaller than 500ci are limited to 2 Solenoids for nitrous.

Heads where chossen for their Flow Characteristics and are one of the only Prostock style/Pontiac heads allowed.

Heads will be built with Ti Valves, Jessel Rockers, Jessel Lifters

Beaflag VonRathburg

iTrader: (176)

I'd like to get a set of All Pros now for my new motor. Where'd you get them, who ported, etc?...

Juiced

iTrader: (2)

Custom 4.030 bore LSW's(12*), Jessel Rockers,Psi Springs, Ti Intake, Inconel Exhaust

Alex @ Cunningham Motorsports (CMS) Can answer any questions you might have.

Mr.MartyStone

iTrader: (12)

Have you thought about any other power adders? I think the 408 will make it down the track faster w/spray if you can keep the heads down. You'll have to run a gang of juice to exceed the BBC though.

Marty

bt283

Why not a 496 BB and shot at it??

G&HRacing

I'd take stroke out of the BBC to get under the 500 inch rule and spray it.

gator's 99TA

iTrader: (2)

IMO 496 cube BBC spun to 8500+ and a big plate

ty_ty13

iTrader: (42)

run a 496 big block with BS3, 2 dry DP kits ftmfw

94z28L

iTrader: (4)

big block rumble

JL ws-6

iTrader: (50)

I'd say go big block and make it a 496 like suggested, 2 solenoids with dual dry kits could get ya probably 300 hp of spray to it... no way that's not gonna be faster then a 555 on motor, especially with the head limitations.

I love ls1 stuff, but with what you want to do you'll have to push it farther then anyone has successfully done on nitrous so far, even if you can get it fast enough, it's not gonna stay together for long. To race a series like you want to do, you need reliability to keep things together..... you don't want to be tearing the motor down every week that's for sure.

BAKED

iTrader: (14)

Def. a 496 with a big shot.

JL ws-6

iTrader: (50)

I assume that a 555 n/a setup is competitive for the class.... if that is the case, a 496 with a 300 hit should easily outrun that, especially if the rules for heads and whatnot are the same, the loss of pwr you would have from going down 60CI vs what you would gain from a 300 hit are not even close, the 496 with a 300 hit wins every time. Especially if you can hook it out of the gate. But, with that tire limitation, I'm gonna guess you will have it set on 2 stages with a delay.

G&HRacing

I assume your 555 is the normal 4.560 x 4.250 = 555. Since you would have to change the crank and get different pistons anyway, I'd bore it to 4.600 and put a 3.75 (396, 427) stroke in it for a 498.

4.600 Bore x 3.750 Stroke = 498

or you would need a custom ground crank to come up with this for your current bore.
4.560 Bore x 3.825 Stroke = 499
4.560 Bore x 3.800 Stroke = 496