1973 STEP A SIDE

iTrader: (4)

I started a post earlier and never went anywhere .
So here I go again . We are about ready to assemble the short block and then move on to the top half .

Build so far .

Short Block .

New LS3 block
Texas Speed 4340 Crank
Texas Speed H Beam Rods w/arp 2000 bolts
Wiseco 4.070 piston -3cc
ARP main studs
ARP head studs
Sac City billet barbell
Holley # 302-3 oil pan
Melling #10296 High Volume High Pressure
Roll Master Billet gears and IWIS Pro chain

Long Block

Cam 236 248 @50 620 603 113+3
Morel # 6504 Lifters
TEA TFS 255 heads
Crowler Shaft mount roller rockers .
Smith Bros Push rods
Fast 102
VMAX Velocity ring
VMAX Ported LS3 T.B.
GM 42# injectors

Compression ratio 12.26

Hopefully it makes power !!

NAVYBLUE210

Looks good! In for results.
What Compression? Able to share
Cam Specs?

64post

iTrader: (5)

What are you doing with it and what are the numbers of that Cam Martin spec-ed for you? Those 42lb injectors might be a concern if you were looking for 550 or more rwhp. "416 build" catches my eye every time.

1973 STEP A SIDE

iTrader: (4)

Compression will be 12.4
Cam 236 248 @50 620 603 113+3

1973 STEP A SIDE

iTrader: (4)

Toy , Auto X and a track day . See above cam specs

dan96z71

Nice. Martin just spec'd out one for my 416 about the same. I will be at 11.8 comp ratio.

236/248 620/.603 115+4

1973 STEP A SIDE

iTrader: (4)

Dan How far along are you with your build ?
I sure hope they are runners . What intake and heads are you using ?

SoFla01SSLookinstok

Looks like a nice combo. Should make good power.

heykw

Did your ls3 block, require any clearancing to install the 4 inch crank?

1973 STEP A SIDE

iTrader: (4)

Yes ! Just a small amount at the bottom of the cylinder wall !

64post

iTrader: (5)

You'll probably have to space your windage tray a bit too. Not sure why notching the bottom edge of the bores is necessary for some but not others, it must be the rods in use. I did not have to with a 4.00 stroke and I beam rods on a 5.7 block.

1973 STEP A SIDE

iTrader: (4)

My son wanted to see what the top end was going to look like .

G Atsma

Looks nice! I like the black valve covers and manifold, plus the clean fuel rails.

Tuskyz28

Really interested in the results

1973 STEP A SIDE

iTrader: (4)

Yes it does look good . I think we will change the crossover line to black .
My son also wants MSD coils , I don't know if ther worth the money .

Tuskyz28

I'm estimating 640 horse at the crank.

1973 STEP A SIDE

iTrader: (4)

That makes at least 3 of use ! My son is hoping for 650 FWHP . I just hope that for about 525 RWHP . Also hoping that it has I good torque curve . Time will tell .

Jimbo1367

1973,
I'd be surprised to see that high IMHO.

64post

iTrader: (5)

At 12.4:1, what kind of fuel will it be tuned for? A/T?

G Atsma

I've read here on these forums that there is little to gain with aftermarket coils, but do a search here to find out the latest. The GM coils do a good job.