DART Ls3 heads
Thread Starter
Instructor
Joined: Dec 2012
Posts: 204
Likes: 3
From: Houston Tx
DART Ls3 heads
Hello people,
I am seeking to upgrade my heads and would like any valuable feedback on the DART Ls3 heads. I have an 05 c6 ls2. I am wanting to pull the trigger on this heads. Any valuable information ?
I am seeking to upgrade my heads and would like any valuable feedback on the DART Ls3 heads. I have an 05 c6 ls2. I am wanting to pull the trigger on this heads. Any valuable information ?
Racer
Joined: Aug 2018
Posts: 458
Likes: 96
What are you goals for the car? Other upgrades done? Still NA?
Thread Starter
Instructor
Joined: Dec 2012
Posts: 204
Likes: 3
From: Houston Tx
Hello,
i would like to make as much power NA until I get a short block (408 or 416). For now i have BTR stage 3 cam, high volume melling oil pump, upgraded windage tray, oil pick up tube, ls7 lifters, upgraded timing chain, long tube headers, cold air intake, ported stock manifold. mcleod clutch, tony mammo throttle body. I thinks thats it.
i would like to make as much power NA until I get a short block (408 or 416). For now i have BTR stage 3 cam, high volume melling oil pump, upgraded windage tray, oil pick up tube, ls7 lifters, upgraded timing chain, long tube headers, cold air intake, ported stock manifold. mcleod clutch, tony mammo throttle body. I thinks thats it.
Racer
Joined: Aug 2018
Posts: 458
Likes: 96
Hello,
i would like to make as much power NA until I get a short block (408 or 416). For now i have BTR stage 3 cam, high volume melling oil pump, upgraded windage tray, oil pick up tube, ls7 lifters, upgraded timing chain, long tube headers, cold air intake, ported stock manifold. mcleod clutch, tony mammo throttle body. I thinks thats it.
i would like to make as much power NA until I get a short block (408 or 416). For now i have BTR stage 3 cam, high volume melling oil pump, upgraded windage tray, oil pick up tube, ls7 lifters, upgraded timing chain, long tube headers, cold air intake, ported stock manifold. mcleod clutch, tony mammo throttle body. I thinks thats it.
Racer
Joined: Aug 2018
Posts: 458
Likes: 96
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Pro
Joined: Mar 2007
Posts: 738
Likes: 226
From: Coast of San Mateo CA
AFR LS3 Heads @ 260 CC VS Darts 280 CC outflow them on Intake & Exhaust and out of
the box will out perform, Especially on a smaller engine due to Higher Velo!
the box will out perform, Especially on a smaller engine due to Higher Velo!
Last edited by Navy Blue 210; Mar 2, 2021 at 10:05 PM.
Thread Starter
Instructor
Joined: Dec 2012
Posts: 204
Likes: 3
From: Houston Tx
yeah i have looked at various aftermarket, stock style ported heads and the stats on them. It seems like the Dart Ls3 heads seem to outflow all heads out of the box. I am planning to purchase them and have them ported as well. I believe the cfm would be over 400.
Pro
Joined: Mar 2007
Posts: 738
Likes: 226
From: Coast of San Mateo CA
Let me try again
AFR 12* Valve Angle 260 CC Intake Port Flows 366 cfm @ ,600" 377 @ .650" , 384 @ .700" Intake (248/251/255 Ex)
Dart Pro Ls3 15* Valve angle, 280 CC Intake port flow 370 cfm intake/252 Exhaust @ .800"!!!
Out of the box by EVERY MEASURE the AFR LS3 Is the SUPERIOR Head!
Not saying the Dart heads are bad, just stating Facts.
AFR 12* Valve Angle 260 CC Intake Port Flows 366 cfm @ ,600" 377 @ .650" , 384 @ .700" Intake (248/251/255 Ex)
Dart Pro Ls3 15* Valve angle, 280 CC Intake port flow 370 cfm intake/252 Exhaust @ .800"!!!
Out of the box by EVERY MEASURE the AFR LS3 Is the SUPERIOR Head!
Not saying the Dart heads are bad, just stating Facts.
Last edited by Navy Blue 210; Mar 3, 2021 at 01:38 PM.
Burning Brakes
Joined: May 2017
Posts: 1,146
Likes: 170
From: Friday Harbor WA
I'm no expert, but after reading an article on aftermarket heads and also given C6 ZO6 valve problems, I would never install aftermarket heads directly on an engine without first having the valves and valve guides checked by a reputable builder! It's quite common for the valves to not properly fit, to have nonconcentric fitting valves (valves not being centered in the valve seat openings) and excessive valve guide tolerances. I spoke personally with a very reputable engine builder on this forum and he confirmed the concerns I mentioned. Buyer beware!
Cruising
Joined: Jun 2018
Posts: 12
Likes: 1
Don't forget, Dart wet flows their heads. Most others dry flow theirs.
Also there is more to a heads power potential that flow rates.
Unless something has changed, when I had access to a flow bench, AFR heads did not flow near their stated cfm. This may have changed as that was years ago.
From my experience, I trust 2 cylinder head manufacturers flow numbers. Brodix and Dart.
Also there is more to a heads power potential that flow rates.
Unless something has changed, when I had access to a flow bench, AFR heads did not flow near their stated cfm. This may have changed as that was years ago.
From my experience, I trust 2 cylinder head manufacturers flow numbers. Brodix and Dart.