LS3 Head

colby · 05-18-2016, 01:39 PM

I see them in the Blueprint guide, what type of head would these fall into? Wedge or inline? I know it may be a disadvantage but can you run an inline head in a higher class that specifically calls out a canted or splayed head or is it limited to the lower class?

SSDiv6 · 05-18-2016, 03:32 PM

Quote:

Originally Posted by colby

I see them in the Blueprint guide, what type of head would these fall into? Wedge or inline? I know it may be a disadvantage but can you run an inline head in a higher class that specifically calls out a canted or splayed head or is it limited to the lower class?

Colby,
The term "inline" valve deals with the location of the valve in relation to the adjacent valves.
The term "wedge" deals with the shape of the combustion chamber.

The LS family of cylinder heads are inline with a "bathtub" style combustion chamber.

Hope this helps.

colby · 05-18-2016, 03:53 PM

So where would this head fall class wise in Modified or Modified Stock?

SSDiv6 · 05-18-2016, 05:06 PM

Quote:

Originally Posted by colby

So where would this head fall class wise in Modified or Modified Stock?

SS/BS class - Inline or Canted Aluminum
SS/CS class - Inline and cast iron only.

Mark Markow · 05-18-2016, 06:58 PM

it can run in ss/as or ss/bs not c/s since it's aluminum.

SSDiv6 · 05-18-2016, 07:54 PM

Mark is correct.
There is a cast iron LS6 head that was, used in the LQ4, 6.0L engine with both cast iron block and heads. They are a copy of the LS6, 15 degree head with cathedral ports. SS/AS is a difficult class because they also allow splayed valve heads.

Adger Smith · 05-19-2016, 03:13 AM

I have always wondered if you could use the iron LS heads successfully in SS/CS. It would be easy to build a small 286 cu in LS to make class minimum weight. Has anyone tried it?

SSDiv6 · 05-19-2016, 11:36 AM

Quote:

Originally Posted by Adger Smith

I have always wondered if you could use the iron LS heads successfully in SS/CS. It would be easy to build a small 286 cu in LS to make class minimum weight. Has anyone tried it?

Adger,

It should make some crazy power in SS/CS.
As cast, the cylinder head has a 210cc intake port volume.
They are also cheap the same with the 6.0 cast iron block.
I don't think anyone has built one yet.

Glenn Briglio · 05-20-2016, 10:05 AM

Quote:

Originally Posted by Adger Smith

I have always wondered if you could use the iron LS heads successfully in SS/CS. It would be easy to build a small 286 cu in LS to make class minimum weight. Has anyone tried it?

Can't use those cast iron heads in ss/cs. Heads were only available on a truck...........Unless nhra changed their ruling on this.

SSDiv6 · 05-20-2016, 12:13 PM

Quote:

Originally Posted by Glenn Briglio

Can't use those cast iron heads in ss/cs. Heads were only available on a truck...........Unless nhra changed their ruling on this.

Glenn, they changed their ruling and the cylinder heads can used in the Modified class only. Not in the regular SS or GT class.

05-18-2016, 01:39 PM	#1
colby Junior Member Join Date: Oct 2014 Location: Noble, OK Posts: 54 Likes: 0 Liked 0 Times in 0 Posts	LS3 Head I see them in the Blueprint guide, what type of head would these fall into? Wedge or inline? I know it may be a disadvantage but can you run an inline head in a higher class that specifically calls out a canted or splayed head or is it limited to the lower class?

05-18-2016, 03:53 PM	#3
colby Junior Member Join Date: Oct 2014 Location: Noble, OK Posts: 54 Likes: 0 Liked 0 Times in 0 Posts	Re: LS3 Head So where would this head fall class wise in Modified or Modified Stock?

05-18-2016, 06:58 PM	#5
Mark Markow Senior Member Join Date: Apr 2008 Location: east hartford ct. Posts: 539 Likes: 0 Liked 9 Times in 3 Posts	Re: LS3 Head it can run in ss/as or ss/bs not c/s since it's aluminum. __________________ Mark Markow 171 ss/tb

05-18-2016, 07:54 PM	#6
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,041 Likes: 712 Liked 1,575 Times in 580 Posts	Re: LS3 Head Mark is correct. There is a cast iron LS6 head that was, used in the LQ4, 6.0L engine with both cast iron block and heads. They are a copy of the LS6, 15 degree head with cathedral ports. SS/AS is a difficult class because they also allow splayed valve heads.

05-19-2016, 03:13 AM	#7
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: LS3 Head I have always wondered if you could use the iron LS heads successfully in SS/CS. It would be easy to build a small 286 cu in LS to make class minimum weight. Has anyone tried it? __________________ Adger Smith (Former SS)