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Old 10-26-2004, 08:55 AM
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GM fast burn heads

I'm looking for info on GM fast burn heads.Is there a difference between these and say dart iron eagle stage 1 heads.Thanks bm

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Old 10-26-2004, 09:32 AM
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What sort of information?

GM FAST BURN HEADS - Taken from Summit Racing
Vendor GM Performance Parts
Product Line GM Performance Parts Fast Burn Cylinder Heads
Cylinder Head Style Assembled
Cylinder Head Material Aluminum
Cylinder Head Finish Natural
Combustion Chamber Volume (cc) 62
CNC Machined Combustion Chamber No
Intake Runner Volume (cc) 210
Exhaust Runner Volume (cc) (Not Specified)
CNC Machined Intake Runner No
CNC Machined Exhaust Runner No
Combustion Chamber Style (Not Specified)
Intake Port Shape (Not Specified)
Intake Port Location Standard
Exhaust Port Shape D-port
Exhaust Port Location Standard
Spark Plug Style Angle
Intake Valves Included Yes
Intake Valve Diameter (in) 2.000
Intake Valve Diameter (mm) (Not Specified)
Exhaust Valves Included Yes
Exhaust Valve Diameter (in) 1.550
Exhaust Valve Diameter (mm) (Not Specified)
Valve Springs Included Yes
Outside Diameter Of Outer Spring (in) 1.250
Damper Spring Included No
Number Of Springs Per Valve Single
Retainers Included Yes
Retainer Material Steel
Locks Included Yes
Lock Style 7 degree
Valve Stem Seals Included Yes
Valve Stem Seal Style Umbrella
Rocker Arm Studs Included Yes
Rocker Arm Nut Thread Size 3/8-24 in.
Rocker Arms Included No
Rocker Arm Nuts Included No
Guideplates Included No
Guideplate Pushrod Size (Not Specified)
Valve Cover Mounting Style (Not Specified)
Accessory Bolt Holes Drilled Yes
Intake Valve Angle (Not Specified)
Exhaust Valve Angle (Not Specified)
Valve Guides Included Yes
Valve Guide Material Bronze
Valve Seats Machined No
Valve Seat Machine Style (Not Specified)
Valve Seat Material Steel
Steam Holes Drilled No
Oiling Style Through pushrod
Machined For O Ring No
Heat Crossover No



DART IRON EAGLE HEADS - Taken from Summit Racing

Vendor Dart
Product Line Dart Iron Eagle Cylinder Heads
Cylinder Head Style Bare
Cylinder Head Material Cast iron
Cylinder Head Finish Natural
Combustion Chamber Volume (cc) 64
CNC Machined Combustion Chamber No
Intake Runner Volume (cc) 180
Exhaust Runner Volume (cc) 75
CNC Machined Intake Runner No
CNC Machined Exhaust Runner No
Combustion Chamber Style Heart
Intake Port Shape (Not Specified)
Intake Port Location Standard
Exhaust Port Shape Square
Exhaust Port Location Standard
Spark Plug Style Straight
Intake Valves Included No
Intake Valve Diameter (in) 2.020
Intake Valve Diameter (mm) (Not Specified)
Exhaust Valves Included No
Exhaust Valve Diameter (in) 1.600
Exhaust Valve Diameter (mm) (Not Specified)
Valve Springs Included No
Outside Diameter Of Outer Spring (in) (Not Specified)
Damper Spring Included No
Number Of Springs Per Valve (Not Specified)
Retainers Included No
Retainer Material (Not Specified)
Locks Included No
Lock Style (Not Specified)
Valve Stem Seals Included No
Valve Stem Seal Style (Not Specified)
Rocker Arm Studs Included No
Rocker Arm Nut Thread Size (Not Specified)
Rocker Arms Included No
Rocker Arm Nuts Included No
Guideplates Included No
Guideplate Pushrod Size (Not Specified)
Valve Cover Mounting Style Center and Perimeter bolt
Accessory Bolt Holes Drilled No
Intake Valve Angle 23
Exhaust Valve Angle 23
Valve Guides Included Yes
Valve Guide Material Manganese bronze intake/Phosphorous bronze exhaust
Valve Seats Machined Yes
Valve Seat Machine Style 4-angle intake/2-angle exhaust
Valve Seat Material Ductile iron
Steam Holes Drilled No
Oiling Style Through pushrod
Machined For O Ring No
Heat Crossover No

There are quite a few differences between these heads. The one main one being that one is Aluminum and the other Cast Iron. This will have a lot to do with what compression you'll be able to run so do your reading and think it over!
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