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Is anyone running these heads? The SPS Haymaker heads look really nice and seem to be the ticket for guys wanting to run smaller ports with increased velocity. Never heard them mentioned on here before.
Is anyone running these heads? The SPS Haymaker heads look really nice and seem to be the ticket for guys wanting to run smaller ports with increased velocity. Never heard them mentioned on here before.
I found out about them on FB. Here is the full info on these heads:
The LS community has been waiting for someone to come out with an LS3 style head that can flow serious air on the exhaust while keeping the intake port and valve small (well, smaller than stock anyways).
We are proud to announce the release of the SPS Haymakers! What's better than a stock size port with a smaller CSA, smaller valve, and still sees more air than a ported LS3? (This head was not based around flow numbers btw)
.750 deck, 4 and 6 bolt castings available
264cc/106cc
2.125/1.600 (2.165 and 2.200 valve options available)
11* valve angle
Chambers start at 74cc but can milled down to desired volume
Custom stainless valves
Bronze guides (powdered metal guides are available)
Custom billet rocker pedestals
......The LS community has been waiting for someone to come out with an LS3 style head that can flow serious air on the exhaust while keeping the intake port and valve small (well, smaller than stock anyways)......
264cc/106cc
2.125/1.600 (2.165 and 2.200 valve options available)
......
Those don't look like "smaller than stock" intake ports and valves to me.....
Gavin from SPS is a straight shooter. He is a SAM grad and particular about what he does. His heads are top of the line without a doubt. I know his aftermarket LS7 heads flow 440+ CFM .... made 700+rwhp N/A.
Dug up a flow sheet for the Haymaker heads in question, runner is slightly smaller than factory LS3 and the CSA is much smaller, therefore a lot better velocity. They use a smaller valve as well.
Looks like these heads, both the LS3 and LS7 variants, are near the top of the totem pole when it comes to high performance cylinder heads. I'm intrigued by the SPS and CID heads. You don't hear anything about them on this site.
Dug up a flow sheet for the Haymaker heads in question, runner is slightly smaller than factory LS3.......
Originally Posted by Rise of the Phoenix
Looks like these heads, both the LS3 and LS7 variants, are near the top of the totem pole when it comes to high performance cylinder heads..........
His web site says intake runners are 264cc and the exhaust runners are 104cc.
Both larger than stock.
Also......the advertised intake flow for these heads are at or below the same level as several other aftermarket offerings that have smaller intake ports.
Not sayin' that these aren't good heads.....but lets keep it real.
Looks like these heads, both the LS3 and LS7 variants, are near the top of the totem pole when it comes to high performance cylinder heads. I'm intrigued by the SPS and CID heads. You don't hear anything about them on this site.
CID LS7 heads complete w/ their intake will set you back around $10k.
They're available as 6-bolt. Gavin is local to me and keeps teasing me with the Haymakers. They're on the to-do list for next winter when I ditch the TSP 5.3s.
03-09-2017, 07:58 AM
