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Re: 289-302-351W INTERCHANGABILITY.

To: Bob Palmer <rpalmer@ames.ucsd.edu>
Subject: Re: 289-302-351W INTERCHANGABILITY.
From: Jim Parent <jimparent@compuserve.com>
Date: Mon, 25 Aug 1997 20:17:54 -0400
Bob,

I read with interest your comment:
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D
"Ran great, but took gobbs of advance; 45-50 =

degrees total!!.  Previous motors with 289 heads and 10.5:1 liked about 3=
6 =

degrees total.  The 351W heads flowed better, but motor seemed to be cryi=
ng

for more compression, so when I rebuilt it I used the TRW pop-up pistons =

(nominal 12:1), which gives 10.9:1 actual.  Everything else was identical=
, =

including the cam which is the Ford Motorsport solid lifter.  Engine runs=
 =

stronger with higher compression and even idles decent at 6-800 rpm, is =

happy with 92 octane, and does not overheat.  It still likes a lot of =

advance though.  I have set up my mech. dist. with 35 degrees advance and=
 =

set initial at about 12 degrees.  Anyone else have my experience with the=
 =

351W heads needing more advance?  I did a lot of porting and polishing of=
 =

the heads and chamfered every edge on the heads and the pistons."
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D
I don't have 351W heads but I do have World Product's Windsor Jr.'s;
ported,
polished, big valves, 1.7 roller rockers, 58cc, bronze inserts, etc.

I have currently set the motor up at 12 degrees initial and 25 degrees
mechanical,
I just unhooked and plugged my vacuum line and it still feels like it nee=
ds
more advance
(which I found hard to beleive).  Your setup tells me to adjust the dist.=

for another =

10 degrees and give it a try.  =


At what rpm is your advance all in?  Mine is curved now for full advance =
at

3500 (right where my torque peaks).

Advice?

Regards,

Jim
B9470139

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