Got my Lt4 383 in the car. It actually started up on the first crank. Gonna take it to Corey Henderson in New Braunsfels Texas. Hopeing for at least 400 RWHP

here are the specs
block is thermally cleaned and magnafluxed to assure it's quality and bored, honed and decked with BHJ fixtures to precise specs. They are assembled with JE forged pistons, Eagle 4340 forged steel crankshafts, Eagle 4340 forged H beam rods, JE plasma moly file fit rings, Clevite 77 HP bearings, Durabond cam bearings, brass freeze plugs and have steel four bolt splayed main caps installed with ARP main bolts.

AFR LT4 195 CC / 64 CC chamber with rev kit
Comp Cams Extreme Energy 510/520 lift 230/236 @50 Lobe 112 (lift rated with 1.5 rockers)
Comp Cams Pro Magnum 1.6 Rockers
Comp Cams Lifters
Aeromotive GM LT- 1 Fuel Pressure Regulators
LT4 Intake
Bosch 30LB injectors
Walbro 255 Fuel Pump
LT4 Intake
ATI Fluidampr LT1 Harmonic Damper
BMR upper & Lower A Arms
BMR K-member
BMR Lower control arms
Sphon Adjustable Torque Arm
QA1 adjustable Front and rear shocks
QA1 300lbs Rated Front springs
NX Nitrous Express up to 250 shot ('I'll probably do 175)
Hooker LT headers with Dynomax 24" Bullet
3.73 Motive Gears
Zexel Torsen Posi
Moser Heavy Duty Axel
MSD 6A Ignition Box
MSD Blaster Coil
Taylor Wires
NGK TR6 plugs

 

Why such a low lift on the cam?

 

Thats with 1.5 rockers

 

Oh, so lift is like .544 int .554 ex. That makes more sense. I might have gone a little higher though to get that $2500 pair of heads you have flowing to full potential.

 

yeah I should have gone with the 520/540 lift 236/242 @ 50. If I dont like how it performs I'll get it. This cams sounds nice though

 

You will be lucky if you hit your goal. The AFRs particularly the smaller ones like those are nowhere near as good as people like to believe.

I predict you would have been much better off to get ported stock castings and a different cam. Don't need rediculous lift either. On the plus side that cam in a 383 should be nice and tame.

I know you didn't like reading that but I have seen enough guys get mediocre at best perfiormance out of the small AFRs to know you would have been better off with ported stockers.

 

What did your compression ratio come out to? And im jealous of your suspension setup. BMR is badass. And im planning on eventually getting some QA1s myself. Did you get single or double adjustable?

 

the comression is 11:1. I got the 12 way adjustable shocks.

 

got a friend that hit 420 RWHP with the similar setup

 

thats crazy my 396 has the same heads and i also got my car tuned by Corey he is a good guy man...ask him if he remembers the guy with the LT4 396 black 95 z28 with a tan convertable. i only got a NA tune because my nitrous kit was no working right at the time.

 

what number did you pull?

 

well i made 400/400 but i know it has more. with all the suporting bolt-ons and a good day i am sure 450 is obtanable.

 

here are my stats car did okay



RWHP-407.79
Max Torque-395.95

Since the engine has less than 50 miles on it the internals were still tight. Mr Hendserson said should see some more HP after I break it in some more.

 

WELL WE PERDICTED THAT IT WAS GOING TO GET THAT AND IT DID SO CONGRATS BUDDY AND HOPE TO SEE GOOD NUMBERS AT THE TRACK.

 

cool man but you should have waited a little bit longer till you dynoed it. that thing is not even broken in with only 50 miles on it. what RPM did you spin it upto.

 

All the way to 6000 RPM

 

Why? We dynoed my Lightning motor with 0 miles lol. Not bad numbers but I thought you wouldve seen more.

 

man should have gone to 6800

 

WELL HE IS JUST STARTING SO IN ABOUT A MONTH HE WILL DYNOE ONCE AGAIN AND LESS SEE HOW MUCH IT GETS. BUT FOR A NEW MOTOR THATS PRETTY DAM GOOD HOPE IT RUN A GOOD NUMBERS. OH BY THE WAY HE STILL NEEDS THE MSD BOX THAT PROBALY GIVE HIM A LITTLE BIT MORE SPARK.

 

Motor should losen up and get a bit more later. Is this via an auto? What size stall if so. My car pulled simialr #'s (unfinished) and ran a 11.68@ 115. I do not have your suspension so you may beat that plus I could not stall my car up due to low vacum for the brakes.