TFS LS2 225cc vs L92 heads
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Registered User
Joined: Jul 1999
Posts: 3,647
From: Winnipeg, Manitoba, Canada
TFS LS2 225cc vs L92 heads
Just as the title states. Which would be the better head? TFS looks like it flows a bit better. Price wise which is cheaper? Not sure if I'm going forced induction or staying NA.
Probably start piecing stuff together next year yet though.
Probably start piecing stuff together next year yet though.
Registered User
Joined: May 2006
Posts: 174
From: archbald, PA
What's it going on???
TFS hands down for a smaller displacement engine, even on larger cubes i'd go with them over the L92 heads...Until an intake solution comes out for the L92, other than a ported L76 or carb style, i'll shy away from these style of heads...
Now if you're planning on a 20xx camarrow, depending on what engine they give you it would be easier to decide...
If it gets LS3, you'll have rectangle port heads on it already...
If it gets LS2, cathedral ports
So, need to know what car your "planning" for
TFS hands down for a smaller displacement engine, even on larger cubes i'd go with them over the L92 heads...Until an intake solution comes out for the L92, other than a ported L76 or carb style, i'll shy away from these style of heads...
Now if you're planning on a 20xx camarrow, depending on what engine they give you it would be easier to decide...
If it gets LS3, you'll have rectangle port heads on it already...
If it gets LS2, cathedral ports
So, need to know what car your "planning" for
Retired
Joined: Oct 1999
Posts: 3,166
From: Inside Uranus
The LS2 heads (they are actually LS6 heads... 243 castings) are 225cc and will fit on a stock bore LS1.
The L92 stuff is around 265cc and will only fit on the big bore stuff.
Does that help you out any?
Mike
The L92 stuff is around 265cc and will only fit on the big bore stuff.
Does that help you out any?
Mike
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Joined: May 2006
Posts: 174
From: archbald, PA
Intake: 210cc
Exhaust: 75cc
Intake Valve: 2.0"
Exhaust Valve: 1.55"
Combustion Chamber: 64.45cc
Registered User
Joined: May 2006
Posts: 174
From: archbald, PA
You can do budget heads for nearly half the price and get high peak numbers, almost that of the aftermarket castings...The tradeoff is area under the curve, and usable power...
Most people bench race over head flow charts and whatnot, but the truth is that huge port heads will be outshined by the smaller port, higher velocity heads out there...Remember, it's not about making the highest peak horsepower, it's about making the most usable power...
The ticket to that is your AFR, ETP, pr TFS heads...For a 6.0 or 6.2, 225cc is plenty of runner to accomplish what you want...Step up to the larger runners for high rpm, high CI builds, otherwise you'll be unhappy with what it makes down low...
Also as said, there is currently no "great" intake option for the L92 based heads, but there are plans for them...
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Joined: Oct 1999
Posts: 3,166
From: Inside Uranus
Retired
Joined: Oct 1999
Posts: 3,166
From: Inside Uranus
Mike
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Joined: Dec 1999
Posts: 2,022
From: MD
TrickFlow heads all the way. I still don't know why anyone would want to build a L92 headed engine!! The only intake choice available is poor, and the exhaust ports on the L92 are terrible! Forget about the purchase price of the L92s and the intake flow numbers - they're meaningless. You'll spend a ton of money just getting the L92 "up to par" and by that time you could have bought superior aftermarket castings WITH a better intake.
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Joined: Dec 1999
Posts: 2,022
From: MD
Intake depends upon a lot of things. We still don't know what engine you're putting these parts on... But if you're looking into those heads, chances are you're looking at a 400+ ci engine. A PROPERLY ported FAST 92 opened up to 95MM with a 95MM throttle body will let it breathe right up to around 6500 or so on a 402/408. Anything larger than that and the RPM range that intake is capable of will drop. For a boosted engine the LS6 usually is the better choice.
Have you looked at the AFR or ETP heads?
Have you looked at the AFR or ETP heads?
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Joined: Oct 1999
Posts: 3,166
From: Inside Uranus
You need to run a FAST 90/90 setup on any type of NA stroker motor LS1 IMO. Mine fed my 408 fine and spun to 7200 rpm without missing a beat.
Head selection is very important.
I would definetly get some ported LS6 heads or look at some of the big names like Larry Meaux, All Pro, or ETP. You need at least a 225cc intake runner to feed that 408. Mine were around 240cc LS6 heads with a 58cc combustion chamber.
Trickflow makes some 13.5 degree 225cc heads. Those might work nicely, too.
Mike
Head selection is very important.
I would definetly get some ported LS6 heads or look at some of the big names like Larry Meaux, All Pro, or ETP. You need at least a 225cc intake runner to feed that 408. Mine were around 240cc LS6 heads with a 58cc combustion chamber.
Trickflow makes some 13.5 degree 225cc heads. Those might work nicely, too.
Mike
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Joined: Dec 1999
Posts: 2,022
From: MD
Maybe a brainfart? Are you assuming TFS LS2 means a ported 243 head? TFS = Trickflow. TFS heads only come in a 13.5 degree valve angle. This discussion is already about the Trickflow heads...
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Joined: Oct 1999
Posts: 3,166
From: Inside Uranus
Yeah, I know all about the Trickflow stuff... I thought he was talking about a ported 243 head from TFS.... whatever that is...
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Joined: Dec 1999
Posts: 2,022
From: MD