Hi Frank,
As Ron said, 4 degrees is too much. IMO the symptoms you describe are normal
for that much cam advance. In general, if you need more than 2 degrees change
to get the characteristics you want then you need a different cam. You
obviously have lots of experience with this combination so if you compromise
and set it at 2 degrees advance you might not loose too much low end grunt,
and be able to reach 90.
John
Fogelsville, PA
--- On Fri, 2/12/10, Frank <spritenut@comcast.net> wrote:
From: Frank <spritenut@comcast.net>
Subject: [Spridgets] Cam Timing
To: "Spridgets" <spridgets@autox.team.net>
Date: Friday, February 12, 2010, 10:32 PM
I am rebuilding my Sprite engine and I have the adjustable timing belt set up
and I have had it for years.
I had the cam advanced a little and my car ran great throughout most of the
range.
However, I had no power pulling hills and a hard time hitting 90 mph.
It would get to 80 just fine and stay there all day but 85-90 seemed tough as
was going up the mountains (Appalachians not the Rockies)
I have a .30 over bore, Kent 266 cam, LCB header, and 1.25 SUs .
5 speed and a 4.22 diff.
My bone stock 67 will pull 90 mph easier than the built engine, not as fast
but it has more omph in the top end.
I think I had the cam 4* advanced and I did play with it when I first put it
on the car to see how each little change affected how the car drove.
I don't know anything about cam advancing so I am asking for help, opinions,
BTDT or as Ed says KISS
-- Frank Clarici
Toms River, NJ
My own Fleet of Sprites
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