Held by admin.. sorry
bject: RE: [Healeys] Engine temps too low.
Richard,
15 degrees BTDC with a strobe light is OK for BJ8's and BJ7's at 600 rpm.
Other models are 5-6 degrees @600rpm.
BJ8 gets 7.5 more at 850 rpm; max centrifugal 19 at 3200 rpm and probably
another 5-6 adv. if the vacuum advance actually works on your car. So that's
about 47 degrees total that your engine can stand. Which sounds like too
much already. I remember 35 or 36 as total. Perhaps someone has that number
at hand?
So, run it up to 3200 point the light and dial up until the marks line up.
It should be NO more than the total allowable. If it is, subtract from the
initial setting, make sure you have the correct dist, the correct advance
curve, the correct vacuum unit, that TDC marks are correct.
I'm sure if you ask your highly respected rebuilder (I do them too, BTW) he
will completely agree with what I just wrote, well to a degree so to speak.
(some times I can't myself)
Aside from the timing issue, the heat issue is not totally clear to me.
160-165 is not detrimental to the exhaust valves, but it does not promote
complete combustion and will decrease fuel mileage. Because of poor
combustion it could enhance carbon build up on the valves and pistons.
I suspect we are not getting the entire picture. Oversized radiator,
supplemental fan, oil cooler, no thermostat, recently rebuilt gauge, you
live at the North Pole..??
A range of 180-190F is where it's at for best performance. Right where the
factory put the gauge needle in the middle of gauge,
From: Richard Kahn [mailto:tahoehealey@hotmail.com]
Sent: Saturday, October 02, 2010 10:42 PM
To: frogeye@porterscustom.com; healeys@autox.team.net
Subject: RE: [Healeys] Engine temps too low.
I was told this by the highly respected dizzy re-builder who probably
rebuilt most of those rebuilt for people on this list. I have adjusted it
back to 16 with no change in temps or performance. The
books say 15 degrees at 600 RPM.
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