Bob,
I read with interest your comment:
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"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."
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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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