Metal Money
02-22-2008, 01:35 PM
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Metal Money
MaxChevy is a free online magazine for Chevy enthusiasts of all stripes. We cover racing, technical articles, news, and anything else that catches our eye. We thought this article we recently ran would be of interest to you folks.
Machine Money
World LS7X Cylinder Heads to the Max
By Ro McGonegal - Photos by “Chevelle” Rob Cossack
From www.MaxChevy.com
http://www.maxchevy.com/syndicate/MC...EAD-1-LEAD.jpg
http://www.maxchevy.com/syndicate/MC-0208-LSXHEAD-2.jpg
In the February 2007 of MaxChevy.com, we posted a lengthy catalog of aftermarket suppliers for the LS engine. Among the entries were the World LS7X cylinder heads (15 and 12-degree versions) that were so new that no one had tried them yet. We’d heard about some ungodly flow numbers afforded by porting, somewhere north of 400cfm. World confirmed the rumor but had no hard figures, only hearsay. Regardless, no one had yet applied them to a Gen-3 engine for a real-world adventure.
These particular 12-degree LS7X castings have not yet graced a short-block, either, but they are absolutely essential to the engine we’ll feature in a few months that is based a 453ci LSX short-block as built by Brian Gruben at Scoggin-Dickey Performance Center. We’ll have a full spread on finished motor (a solid-roller twin-turbo), the car it will power (a pump-gas street rat), and all the empirical data you can stomach.
As the LS7X castings are low-production units, they are shipped in semi-finished form. This is standard procedure and is just like any other reputable vendor would do. When you order bare castings, the valve seats, etc., are in unfinished form. The work performed here was by Matt Hilton at HPS Cylinder Heads. He would routinely charge at least $1,500 to put these castings in bolt-on form, right on par with any other quality cylinder head service in the country. Matt has been porting iron (as well as aluminum) for 15 years and is celebrating his sixth anniversary as HPS the company.
PORTED LS7X CYLINDER HEAD FLOW (CFM)
LIFT INTAKE EXHAUST
.100 68.38 52.9
.200 140.61 104.7
.300 211.84 143.12
.400 269.6 195.7
.500 318.53 224.11
.600 351.29 248.49
.650 376.41 261.91
Link to original story:
http://www.maxchevy.com/tech/2008/iii_2-lsx-1.html
Machine Money
World LS7X Cylinder Heads to the Max
By Ro McGonegal - Photos by “Chevelle” Rob Cossack
From www.MaxChevy.com
http://www.maxchevy.com/syndicate/MC...EAD-1-LEAD.jpg
http://www.maxchevy.com/syndicate/MC-0208-LSXHEAD-2.jpg
In the February 2007 of MaxChevy.com, we posted a lengthy catalog of aftermarket suppliers for the LS engine. Among the entries were the World LS7X cylinder heads (15 and 12-degree versions) that were so new that no one had tried them yet. We’d heard about some ungodly flow numbers afforded by porting, somewhere north of 400cfm. World confirmed the rumor but had no hard figures, only hearsay. Regardless, no one had yet applied them to a Gen-3 engine for a real-world adventure.
These particular 12-degree LS7X castings have not yet graced a short-block, either, but they are absolutely essential to the engine we’ll feature in a few months that is based a 453ci LSX short-block as built by Brian Gruben at Scoggin-Dickey Performance Center. We’ll have a full spread on finished motor (a solid-roller twin-turbo), the car it will power (a pump-gas street rat), and all the empirical data you can stomach.
As the LS7X castings are low-production units, they are shipped in semi-finished form. This is standard procedure and is just like any other reputable vendor would do. When you order bare castings, the valve seats, etc., are in unfinished form. The work performed here was by Matt Hilton at HPS Cylinder Heads. He would routinely charge at least $1,500 to put these castings in bolt-on form, right on par with any other quality cylinder head service in the country. Matt has been porting iron (as well as aluminum) for 15 years and is celebrating his sixth anniversary as HPS the company.
PORTED LS7X CYLINDER HEAD FLOW (CFM)
LIFT INTAKE EXHAUST
.100 68.38 52.9
.200 140.61 104.7
.300 211.84 143.12
.400 269.6 195.7
.500 318.53 224.11
.600 351.29 248.49
.650 376.41 261.91
Link to original story:
http://www.maxchevy.com/tech/2008/iii_2-lsx-1.html
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