Complete set of
Aluminum SBC Heads
Pair
Straight plug
210cc intake runner
64cc chambers with improved flow
Stronger Pressure casted Aircraft grade 356A aluminum alloy heat treated to T6 specs.newer process with less porousity and better consistance of port sizing
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Harden valve seats
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Bronze valve guides
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Accepts center bolt and rail type valve covers
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Standard accessory bolt holes
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Plus .400 thick deck for severe uses
2.02 intake valves
1.60 exhaust valves
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Valves are one piece forging EV-8 stainless steel alloy
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Harden chrome plated stems
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Undercut stems powerflow design for improved flow
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Fully machined and swirl polished stems
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Harden tips NO lash caps required
Valve springs
Your choice for same price
Flat tappet hydraulic
1.250 Diameter (single spring w/damper)
110lbs at 1.700" installed height
300lbs at 1.250" open pressure
Max. lift .500
Hydraulic roller or Mechanical flat tappet
1.260 Diameter (single spring w/damper)
135lbs at 1.750" installed height
310lbs at 1.200" open pressure
Max. lift .560
If your application requires different springs then shown just Email and we will quote if price is different CGMSHIPPING@AOL.COM
We assemble all headsin our shop to your application using high quality parts
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High temperature Positive viton valve seals for superior oil control
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5/16" guideplates high quality heat treated steel
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3/8" or 7/16" screw in rocker studs
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7 degree chrome moly retainers to match springs
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7 degree 11/32" valve locks
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Harden spring cups and shims
We flow tested these heads on our Superflow SF1020 flow bench with Preformance Trend analyzing software using valves and head as they come from manufactures. These flow numbers are not inflated to sell heads. We have seen up to a +/- 5% from these flow numbers from casting to casting.
Intake flow data w/2.02" at 28" of water
LIFT CFM
.100" 70.7
.200 146.4
.300 203.7
.400 249.8
.500 261.0
.600 266.5
.700 276.4
Exhaust flow data w/1.60" at 28" of water
.100 57.2
.200 101.0
.300 156.9
.400 176.9
.500 186.3
.600 190.1
.700 194.8
We are a premier High performance machine shop with over 20 years in business. All heads are inspected and machine work done in our shop. We DO NOT just assemble these heads each set is machined and built to the buyers application.Buyer responsible for fitment like any HP parts. If you have any question please contact us..
CGM MOTORSPORTS
8211 Cloverleaf Dr. Millersville, Md 21108
Phone (410)766-SHOP(7467)
EMail CGMSHIPPING@AOL.COM