113 and 128 castings?
Drifting
Joined: Apr 1999
Posts: 1,261
Likes: 6
From: Middletown New Jersey
Don't bother with the 128's since 113's are pretty cheap anyway. The 113's have greater power potential.
The mistake in my build was to have my 128's lightly worked over and had 2 x 1.56 valves and 1,6 pro mag RR's. I know that they are a bottleneck in my setup now after a few years of trying a few things.
The mistake in my build was to have my 128's lightly worked over and had 2 x 1.56 valves and 1,6 pro mag RR's. I know that they are a bottleneck in my setup now after a few years of trying a few things.
Thread Starter
Instructor
Joined: Mar 2005
Posts: 217
Likes: 0
From: 86 Z51 Coupe Branson,MO
What cc do the 113 come stock with.Meaning combustion chambers.58cc?If so if this alright to put on my 86E with cast heads?What would this bump my CR to?I think my heads are 76cc.
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Le Mans Master
Joined: Sep 2004
Posts: 6,019
Likes: 568
From: Conroe Texas
i think the 89's were the first year for the 113 heads, and continued to the 91's. i put flat top pistons, with the valve relief trough, in my 89 and bumped the compression to about 11.4, a tad bit much for pump gas.
Drifting
Joined: May 2003
Posts: 1,979
Likes: 48
From: Lakeport CA
Actually cleaning up the outsides of the heads was pretty easy. Only took a couple of afternoons of work w/ my dremel tool & porting/sanding rolls. Cleaning up the ports & combustion chambers took much longer. Of course I needed to be careful & keep things even & to a minimum. The results though speek for themselves.
