I think and may be wrong that the port placement on an 18 degree head while
different is the same style as a 23 degree head. IE they are next to each
other unlike a SB2 or the spread port heads that look like a mini big block
head. If memory serves me correct the bolt pattern is the same but at a
higher location on the 18 degree head if that makes sense. Dan Warner might
be one of the guys to answer this question. I know he and I had a bunch of
e-mails a year or two ago about this very subject.
Dave Dahlgren
> -----Original Message-----
> From: Freiburger, David [mailto:David.Freiburger@primedia.com]
> Sent: Monday, January 03, 2005 12:48 PM
> To: 'Want1937hd@aol.com'; 'saltfever@comcast.net'; 'ddahlgren@snet.net';
> 'land-speed@Autox.Team.Net'; 'John Beckett'
> Subject: RE: Engine Config
>
>
> But the rule book defines "stock" heads as stock bolt patterns on
> the intake
> and deck, right? Which raises the question of how guys run 18-degree stuff
> with raised intakes ports in Production. I've always been confused by what
> you can and can't get away with as far as heads in Production. Help?
>
> DF
>
> > ----------
> > From: John Beckett
> > Reply To: John Beckett
> > Sent: Monday, January 3, 2005 8:11 AM
> > To: Want1937hd@aol.com; saltfever@comcast.net;
> ddahlgren@snet.net;
> > land-speed@Autox.Team.Net
> > Subject: Re: Engine Config
> >
> > Can't do that in a /PRO class. Gotta have stock type heads.
> >
> > JB
> > ----- Original Message -----
> > From: <Want1937hd@aol.com>
> > To: <saltracer@servusa.com>; <saltfever@comcast.net>;
> > <ddahlgren@snet.net>;
> > <land-speed@autox.team.net>
> > Sent: Monday, January 03, 2005 9:52 AM
> > Subject: Re: Engine Config
> >
> >
> > > In a message dated 01/03/2005 9:14:30 AM Eastern Standard Time,
> > > saltracer@servusa.com writes:
> > >
> > > > If you took a stock 23 deg Chevy head and added overhead
> cams what did
> > you
> > > > gain?
> > > >
> > > > JB
> > > >
> > >
> > > I've always thought the OHC allowed you to have a hemispherical
> > compustion
> > > area with the valves at 90% to where they are on a rocker arm
> head. That
> > gives
> > > better combustion and better flow. Bob in connecticut
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