head replacement
Safety Car
Joined: Sep 2004
Posts: 3,953
Likes: 550
From: Mission Viejo CA
I'm sure you've got more answers that I do! I'm running the 993 iron heads, but I've got flat top pistons.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
MrWillys, is there an iron head that will fit his engine that wouldn't require major intake changes, that has 58cc chambers? Isn't that a major reason for the aluminum heads, so you can get away with higher compression ratios? If that's true, does the OP have any choice but to go with larger chambers if he wants the iron heads? He said he wanted iron heads. He didn't say anything about his quest for power. Does his engine have dished-top pistons? What size is this dish?
I'm sure you've got more answers that I do! I'm running the 993 iron heads, but I've got flat top pistons.
I'm sure you've got more answers that I do! I'm running the 993 iron heads, but I've got flat top pistons.
Melting Slicks
Joined: Jan 2009
Posts: 3,482
Likes: 195
From: folsom california
They also had 58 c.c. combustion chambers, an exhaust crossover for EGR (if needed, and I did) and valve rotators on the exhaust valves...damn nice heads; the only issue would be the angle of the center bolts holding down the intake manifold; all early heads used bolt holes drilled perpendicular to the intake manifold surface; on these later heads the center holes are rotated into a more vertical angle; not a big deal, but something to check.
A pair of these even junk yard, once given a valve job would be a very affordable alternative to vortec heads which have a completely different intake bolt pattern or other aftermarket heads.
Dart Sportsman II heads are really nice, but a bit pricey; they are the only aftermarket cast iron heads with a CARB exemption number and exhaust gas crossover passage.
Last edited by mtwoolford; Apr 25, 2016 at 04:02 PM.
