Big boost with rectangular port heads? Step inside
01-21-2013, 06:41 AM
#50
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Use LSA heads or LS9 heads. I am almost positive they are the same castings with different size bolt holes anyway. A member a week or 2 ago cut apart a bunch of GM heads he did 243's 317's LS3 ,LSA,LS7s (I believe LS7s as well).
The LSA/s had internal webbing around all the bolt holes, slightly thicker deck and made of a much higher grade aluminium. He claimed he needed to actually use a good cutter to get through the LSA head. Where the LS3 head was the softest of them all.
I run the LSA heads with a LS3 intake no issue beside grinding off 1 plastic locater tab on the LS3 intake. A L92 Vic Jr bolted right on as well but it is really tall for a 4th Gen under the hood.
In my opinion the LSA heads are hands down the BEST stock casting head for boost. Probably will pick up a ton of power from them as well compared to a hogged 317. If I am not mistaking they are 265cc as cast intake runners. Keeping the ports small to maintain runner velocity isnt such an issue when its pressurized lol.
The LSA/s had internal webbing around all the bolt holes, slightly thicker deck and made of a much higher grade aluminium. He claimed he needed to actually use a good cutter to get through the LSA head. Where the LS3 head was the softest of them all.
I run the LSA heads with a LS3 intake no issue beside grinding off 1 plastic locater tab on the LS3 intake. A L92 Vic Jr bolted right on as well but it is really tall for a 4th Gen under the hood.
In my opinion the LSA heads are hands down the BEST stock casting head for boost. Probably will pick up a ton of power from them as well compared to a hogged 317. If I am not mistaking they are 265cc as cast intake runners. Keeping the ports small to maintain runner velocity isnt such an issue when its pressurized lol.
01-21-2013, 01:28 PM
#51
Use LSA heads or LS9 heads. I am almost positive they are the same castings with different size bolt holes anyway. A member a week or 2 ago cut apart a bunch of GM heads he did 243's 317's LS3 ,LSA,LS7s (I believe LS7s as well).
The LSA/s had internal webbing around all the bolt holes, slightly thicker deck and made of a much higher grade aluminium. He claimed he needed to actually use a good cutter to get through the LSA head. Where the LS3 head was the softest of them all.
I run the LSA heads with a LS3 intake no issue beside grinding off 1 plastic locater tab on the LS3 intake. A L92 Vic Jr bolted right on as well but it is really tall for a 4th Gen under the hood.
In my opinion the LSA heads are hands down the BEST stock casting head for boost. Probably will pick up a ton of power from them as well compared to a hogged 317. If I am not mistaking they are 265cc as cast intake runners. Keeping the ports small to maintain runner velocity isnt such an issue when its pressurized lol.
The LSA/s had internal webbing around all the bolt holes, slightly thicker deck and made of a much higher grade aluminium. He claimed he needed to actually use a good cutter to get through the LSA head. Where the LS3 head was the softest of them all.
I run the LSA heads with a LS3 intake no issue beside grinding off 1 plastic locater tab on the LS3 intake. A L92 Vic Jr bolted right on as well but it is really tall for a 4th Gen under the hood.
In my opinion the LSA heads are hands down the BEST stock casting head for boost. Probably will pick up a ton of power from them as well compared to a hogged 317. If I am not mistaking they are 265cc as cast intake runners. Keeping the ports small to maintain runner velocity isnt such an issue when its pressurized lol.
01-21-2013, 02:12 PM
#53
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I know they are aftermarket, but these are the ones I'm going with. Will also be spring before testing them. They have .750" deck & 6-bolt for down the road if needed.
http://www.texas-speed.com/p-4008-pr...der-heads.aspx
http://www.texas-speed.com/p-4008-pr...der-heads.aspx
