PRI 2011: Scoggin-Dickey Parts Center Makes the LSX Head Even Better

If you’re looking for high-performance Chevy parts, Scoggin-Dickey Parts Center should be on your list – they’re legendary in the small block Chevy market, and they’ve enthusiastically embraced the LS platform and all it has to offer as well. A perfect example of this is their recently released LSX-LS7 CNC Ported Head.

SDPC starts with GMPP’s LSX casting, which features increased deck thickness and a six-bolt design for increased strength in boosted applications, and applies their own CNC program to take flow from “amazing” to “unbelievable” without killing velocity. It’s a head that is at home in small-bore/small-displacement applications – unlike some LS cylinder heads boasting big CFM numbers, it’s not “too much head” for an engine that isn’t at the outer limits of cubic inches.

A close look into the water jacket shows the increased deck thickness of the LSX-LS7 head casting.

These heads require a minimum bore of 4.100 inches, and the assembled version comes with 2.200-inch titanium intake valves and 1.610-inch sodium-filled exhaust valves. The double-spring setup will support a max lift of .650 inches, and at .600 lift, SDPC says these heads will flow 375 CFM on the intake side and 229 on the exhaust, compared to 335/215 for the as-cast head at the same lift.

The LSX-LS7 casting is based on the production CNC ports, and SDPC takes it a step further with a "clean-up" CNC on the bare casting.

The end result is a head that flows better than anything in the GMPP catalog short of an LSX-DR, that accepts standard valvetrain components and manifolds. Better still, it’s built and sold by one of the best names in the business.

 

About the author

Paul Huizenga

After some close calls on the street in his late teens and early twenties, Paul Huizenga discovered organized drag racing and never looked back, becoming a SFI-Certified tech inspector and avid bracket racer. Formerly the editor of OverRev and Race Pages magazines, Huizenga set out on his own in 2009 to become a freelance writer and editor.
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