408 dyno results
Originally Posted by marine02ss
What port volume are those heads,makes me wonder why I have low peak #s with my afr205 and big cam?
The flow #s are
Lift int exh
.100 66 55
.200 140 112
.300 214 163
.400 261 192
.500 292 213
.550 296 214
.600 288 218
LS6 CNC ported part # 88958665
My Pistons Have A 10 Or 11 Cc Valve Reliefs So I Think I Should Be Fine With P To V Clearance And Thats What Brian Told Me From Lme.the Only Thing Im Concerned About Is The Pushrod Size I Have The 7.350 ? THAT CAME WITH THE SET UP FROM PACE PERFORMANCE.
Originally Posted by wicked z28
My Pistons Have A 10 Or 11 Cc Valve Reliefs So I Think I Should Be Fine With P To V Clearance And Thats What Brian Told Me From Lme.the Only Thing Im Concerned About Is The Pushrod Size I Have The 7.350 ? THAT CAME WITH THE SET UP FROM PACE PERFORMANCE.
I also dealt with brian @ lme great guy who takes the time to really help you
Yes Brian will be builing my 408 too. He dosent know it yet 
I have so far .030 iron 6.0
-2cc Diamond slugs
manly h-beam
slp oil pump
eagle 4.00 crank
I need to buy the afr's and fast combo and valvetrain. I will let him tell me what to get. I should have it done in a month or 2.
I have so far .030 iron 6.0
-2cc Diamond slugs
manly h-beam
slp oil pump
eagle 4.00 crank
I need to buy the afr's and fast combo and valvetrain. I will let him tell me what to get. I should have it done in a month or 2.
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TECH Senior Member
iTrader: (3)
Joined: Apr 2006
Posts: 6,524
Likes: 1
From: Western Burbs of Detroit
The more I read about the 408, the more I want to have them start building it. Keep in mind that I just got back from Texas on April 1st. 2 months, and I've been bit by the HP bug again. I think my lil 346 is pretty much maxed out. Maybe squeeze a few more outta her. Goal for final tune will be 480 rwhp 435 rwtq. By the way great numbers on your motor. Can't wait to have mine built.
Originally Posted by Badls6SS
Well i just finished getting my car tuned last night here it is.
408 = 495rwhp and 470 rwtq. SAE
eagle crank and h beam rods
diamond -2cc pistons
GMPP cnc ls6 heads 64cc
cometic .051" gasket
ARP stud and bolts through out
Fast 90mm w/ NW 90 tb
cam motion 244/249 641/644 112lsa
7.400" push rods and rebuilt stock rocker arms with lingenfelter billet stands
comp lifters
85mm maf
38.5 inj.
walbro intank pump
meizier elec. pump
1/34 stepped to 17/8 dyna tech headers into 3.5 stainless works exhaust
M6 w/ moser 12 bolt and 4.10's
408 = 495rwhp and 470 rwtq. SAE
eagle crank and h beam rods
diamond -2cc pistons
GMPP cnc ls6 heads 64cc
cometic .051" gasket
ARP stud and bolts through out
Fast 90mm w/ NW 90 tb
cam motion 244/249 641/644 112lsa
7.400" push rods and rebuilt stock rocker arms with lingenfelter billet stands
comp lifters
85mm maf
38.5 inj.
walbro intank pump
meizier elec. pump
1/34 stepped to 17/8 dyna tech headers into 3.5 stainless works exhaust
M6 w/ moser 12 bolt and 4.10's
TECH Apprentice
Joined: Sep 2005
Posts: 370
Likes: 0
From: DFW, TX
Originally Posted by Badls6SS
The intake port vol. is 243cc
The flow #s are
Lift int exh
.100 66 55
.200 140 112
.300 214 163
.400 261 192
.500 292 213
.550 296 214
.600 288 218
LS6 CNC ported part # 88958665
The flow #s are
Lift int exh
.100 66 55
.200 140 112
.300 214 163
.400 261 192
.500 292 213
.550 296 214
.600 288 218
LS6 CNC ported part # 88958665
wow. you can get better heads than that and more power. not to knock AFR's yes they make great power out of the box but you pay alot for them. ive got a cyl head machinist that takes LS6 stock cores and gets them to flow 314-315 @.600 with stock valve sizes. go to a 2.08 and he can get them up to the 350's.
