#993 sbc heads
05-13-2002, 07:10 AM
#1
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Car: 89rs (previous 2.8)
Engine: 406
Transmission: 700r4 (for now)
#993 sbc heads
How would these perform on a 327ci with flat top piston ?
3998993....72-73...307/350......75cc chambers
3998993....current..350.........Goodwrench crate motors,"Hecho en Mexico",75cc chambers
3998993....72-73...307/350......75cc chambers
3998993....current..350.........Goodwrench crate motors,"Hecho en Mexico",75cc chambers
05-13-2002, 11:41 PM
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
They're good castings but would have low compression ratio for a 327 with flat tops. They're better suited for a 350 or 400.
05-14-2002, 04:35 AM
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Thanks Guys, thats all I needed to know...have a great day. Im going to go with World Sportsman II. Im thinking 64cc chambers, what ya think?
05-16-2002, 01:07 AM
#6
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You can get a good street compression ratio with these heads on a 327 if you have them flat milled .060".
This should reduce the chamber volume to 67cc's.
On a .030" over flat top 327 that is "0 decked" , using a felpro .039"
gasket,, your cr will be 9.4 :1... If the piston is .025" below
deck use a .015" shim gasket (factory type).
They will give good flow when ported.
This should reduce the chamber volume to 67cc's.
On a .030" over flat top 327 that is "0 decked" , using a felpro .039"
gasket,, your cr will be 9.4 :1... If the piston is .025" below
deck use a .015" shim gasket (factory type).
They will give good flow when ported.
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