quik01ss

iTrader: (24)

403ci iron motor
AFR 225cc big bore heads. Untouched
Thunder racing v.2 stroker can
Meziere ewp
42.5# injectors
Vengeance FAST102-102
GZ vacuum pump
ARH 1⅞ headers
Kooks TD-CME
Textrilla Twin disk clutch
S60. 4.10s

Jimbo1367

Impressive.

MMorgan9812

iTrader: (6)

Didn't see this post till now even though I subscribed.... Great Numbers!!

KyleLanter

iTrader: (2)

408ci iron motor 9:1 compression (Boost in the near future)
LS3 heads titanium valves, competition valve job, comp springs/ titanium retainers
Comp custom grind cam
60# injectors
FAST102 intake/ 92 big mouth TB
Pacesetter 1⅞ headers
3 1/2" ORY Borla muffler
Centerforce Clutch
Moser 9" 3.89 gear

Car made 440hp/ 438tq

unwantedstray

This thread has been great, except I have now confused myself on my original build plan. Here is what I have:

6.0L Iron block
K1 forged rotating assembly
Weisco -8cc pistons
ARP hardware
Comp Cams 54-472-11

Originally I was planning on running the Trick Flow GenX 255 heads with the above cam and FAST LSXR intake and 102mm TB.

I want the car to be an aggressive street/strip car that will probably get street driven and maybe some autox or road course.

Should I rethink my plan and run a smaller cathedral port head like the TFS 235s and a different cam?

Any input would be gratefully appreciated.

Thanks,
Zack

Orange Juice

iTrader: (3)

I can only say, I'm very happy with the 235 heads.

Mazzenger

iTrader: (5)

I am running TFS 235cc heads on my 408.
My build is on page 14 of this thread. It is the first and second post on page 14.
I'm super happy with them.

Matt330LS

I'm building my car now, and have the same K1/Wiseco 408 shortblock setup you have. I had Cam Motion spec a cam for it, and chose to run an LS6 intake and factory 317 heads with BTR .660 springs and stainless valves in order to spend money on suspension bits. I bring it up since you mentioned road course and street driving, which is what I'm doing with my swap. It may not be max airflow for a 408, but will still make plenty of power and torque until I get around to upgrading heads and intake.

Sprayed 99

iTrader: (14)

405" LS2
11.5:1
BECK sheet metal intake
Mast/PI 225 heads
259/267 hyd roller
2" primary headers, 4" single dumped

582 hp 525 tq sae to the tires. 9.99@137.3

mikesanto70

What wheels are on your Black 4th gen SS? SIZE/OFFSET/TIRES SIZE IF U KNOW PLEASE

transamluva99

iTrader: (4)

516rwhp/ 493rwtq

LS2 BLOCK
4.005 BORE
4.0' STROKE
6.125 RODS
WIESCO PISTONS
CR 11.1:1
COMP 243/251 612 112LSA
243 HEADS PORT & POLISHED
F.A.S.T 102 PORTED VENGEANCE RACING
NW 102 TB
42lb INJECTORS
T56
MCLEOD RXT TWIN DISC
1-7/8"x 3" KOOKS
3" GMMG EXHAUST
QP 9" REAR END

Tuskyz28

any track times out this combo ?

SAPPER

iTrader: (10)

Finally got my sons car i, for a final tune .
LS2 block
.030 over
10.8:1 CR
BTR stg4
243s with a little work to smooth the out
fast 102 intake
Warr 102 TB
104mm maf
42# injectors
93 pump gas
492/471 on a dynojet
ambient temps were 100+
But according to a douche on facebook, our numbers are weak. His cam only LS3 makes over 550 .

G Atsma

At the flywheel, maybe….

HCI2000SS

iTrader: (2)

Those are damn good numbers for just lightly worked 243's

G Atsma

I don't think he has any reason to be disappointed.

HCI2000SS

iTrader: (2)

Exactly. And you're right about that 550 being at the flywheel on a cam only LS3. Most I've ever seen at the wheel is 500. Others I've seen are range from 470-490

SAPPER

iTrader: (10)

All this is going on on fbody nation on fb.

ohioborn80

iTrader: (2)

Great thread. Im in process of planning a 408 stroker. Aiming for least 550whp before a 200 shot.

Buryingthesun

408
524.8 FT/LBS 552.4 HP (crank figures) * Power figures through truck manifolds and 2.5" down pipes *
93 octane pump gas
Iron 6.0L block
243 PRC 2.5's
Callies dragon slayer 4.00" crank
Callies compstar rods
Weisco 12.5 pistons
Edelbrock Super Victor
Straub Trunnion Bushings
Custom Comp Camshaft (Close to ASA specs)
CFM Performance 750 carb
MSD Pro Billet Distributor
Meziere Electric Water Pump
Melling oil pump
Crank scraper / windage tray

Attachment 715609