New LS2 C5R Type Mini Heads
Thread Starter
NCM, WSCC & SCC Member
Joined: Oct 2002
Posts: 2,900
Likes: 1
New LS2 C5R Type Mini Heads
About sixty days ago I mentioned that GM was going to produce a mini C5R type head.
They have been announced. Expect pricing to be very aggressive.
LS2 only
15 Degree valve angle
1.7 Rockers
2.16 Titanium intake valve
1.59 Sodium filled exhaust valve
350 cfm at .600
280 cfm at .400
Word
They have been announced. Expect pricing to be very aggressive.
LS2 only
15 Degree valve angle
1.7 Rockers
2.16 Titanium intake valve
1.59 Sodium filled exhaust valve
350 cfm at .600
280 cfm at .400
Word
Last edited by #001 2001 Z06; Jul 7, 2015 at 01:45 PM.
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Safety Car
Joined: Mar 2002
Posts: 4,928
Likes: 1
Cruise-In V Veteran
St. Jude Donor '09
Originally Posted by #001 2001 Z06
About sixty days ago I mentioned that GM was going to produce a mini C5R type head.
They have been announced. Expect pricing to be very aggressive.
LS2 only
15 Degree valve angle
1.7 Rockers
2.16 Titanium intake valve
1.59 Sodium filled exhaust valve
350 cfm at .600
280 cfm at .400
Word,
They have been announced. Expect pricing to be very aggressive.
LS2 only
15 Degree valve angle
1.7 Rockers
2.16 Titanium intake valve
1.59 Sodium filled exhaust valve
350 cfm at .600
280 cfm at .400
Word,
I believe these are the L92 (truck) heads - and they should work on LS1/LS6 ( as cast 6.0L bore and smaller valves seats than LS7).
The flow #s and valve sizes above aren't as cast (TXNC5 reported on L92 heads in late summer 2005 - maybe he'll chime in with additional info
). FWIW.
Last edited by Bink; Jan 23, 2006 at 06:33 PM.
Thread Starter
NCM, WSCC & SCC Member
Joined: Oct 2002
Posts: 2,900
Likes: 1
Bink,
They will not work on LS1's 99mm bore. This was the original belief and hope. The stock bore is too small on the LS1. Update: The flow numbers were based off a mildly ported set.
The information came straight from GM. It is as stated, unless they make changes. Going into production now. Information should be hitting the newsstands this week as well.
Piano "Aggressive meaning they're going to be a very reasonable price and thus competitive?"
And then some...
GM PART # 12582714
CATEGORY: Engine Cylinder Head
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $281.79
OUR PRICE: $160.62
DESCRIPTION: HEAD
They will not work on LS1's 99mm bore. This was the original belief and hope. The stock bore is too small on the LS1. Update: The flow numbers were based off a mildly ported set.
The information came straight from GM. It is as stated, unless they make changes. Going into production now. Information should be hitting the newsstands this week as well.
Piano "Aggressive meaning they're going to be a very reasonable price and thus competitive?"
And then some...
GM PART # 12582714
CATEGORY: Engine Cylinder Head
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $281.79
OUR PRICE: $160.62
DESCRIPTION: HEAD
Last edited by #001 2001 Z06; Jul 7, 2015 at 01:45 PM.
Safety Car
Joined: Sep 2003
Posts: 3,558
Likes: 2
From: Cape Coral FL
Originally Posted by #001 2001 Z06
GM PART # 12582714
CATEGORY: Engine Cylinder Head
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $281.79
OUR PRICE: $160.62
DESCRIPTION: HEAD
Brent.
CATEGORY: Engine Cylinder Head
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $281.79
OUR PRICE: $160.62
DESCRIPTION: HEAD
Brent.
At that price, are they iron or aluminum? I'm assuming aluminum, although experience would say iron. I'm sure that to run an aggressive cam one would need to upgrade the springs. Also, do you know what the chamber size will be? I would think that a sleeved LS1 with larger than 4" bore would work if the bolt pattern matches. Looks like an LS2 in my future even though I've been shying away from it due the the knock sensor incompatability.
Pro
Joined: Oct 2004
Posts: 514
Likes: 2
Originally Posted by ArKay99
At that price, are they iron or aluminum? I'm assuming aluminum, although experience would say iron. I'm sure that to run an aggressive cam one would need to upgrade the springs. Also, do you know what the chamber size will be? I would think that a sleeved LS1 with larger than 4" bore would work if the bolt pattern matches. Looks like an LS2 in my future even though I've been shying away from it due the the knock sensor incompatability.Are people just disabling them?
Pro
Joined: Oct 2004
Posts: 514
Likes: 2
Originally Posted by Randy@DRM
The knock sensor can be easly fixed. We have ran LS2 sensors with a Racetronix wiring harness. We have done about 7 of these with great results.
Randy
Randy
Pro
Joined: Aug 2005
Posts: 655
Likes: 1
From: Seminole FL
St. Jude Donor '12
Originally Posted by #001 2001 Z06
Bink,
They will not work on LS1's 99mm bore. This was the original belief and hope. The stock bore is too small on the LS1. Update: The flow numbers were based off a mildly ported set.
The information came straight from GM. It is as stated, unless they make changes. Going into production now. Information should be hitting the newsstands this week as well.
Piano "Aggressive meaning they're going to be a very reasonable price and thus competitive?"
And then some...
GM PART # 12582714
CATEGORY: Engine Cylinder Head
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $281.79
OUR PRICE: $160.62
DESCRIPTION: HEAD
Brent.
They will not work on LS1's 99mm bore. This was the original belief and hope. The stock bore is too small on the LS1. Update: The flow numbers were based off a mildly ported set.
The information came straight from GM. It is as stated, unless they make changes. Going into production now. Information should be hitting the newsstands this week as well.
Piano "Aggressive meaning they're going to be a very reasonable price and thus competitive?"
And then some...
GM PART # 12582714
CATEGORY: Engine Cylinder Head
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $281.79
OUR PRICE: $160.62
DESCRIPTION: HEAD
Brent.
Melting Slicks
Joined: Feb 2002
Posts: 2,613
Likes: 0
From: Winston Salem NC
Originally Posted by greg_nate
So how do we get around the knock sensor issues? I've read they were incompatible, but haven't read about any solutions.
Are people just disabling them?
Are people just disabling them?