You have seen the mail I posted re. the steering box oil leak and I await
your clarification on this matter. Was I correct in describing the seal in
question or is there some sort of simple O-ring which I have missed??
---------------------
Re. camshafts: I need your clarification on the term " l/C 108 " which
puzzles. Tim posted a thought on this but that is not the answer, as cam
grinders do NOT quote such a figure for lobe center to center. Reason being
that the grinder MUST make the valves open and close in relationship to
ONLY the crankshaft angles. No concern is made for the relationship
between lobes nor is anyone interested in such a measurement.
Jarrid writes about a Series II and SII Rally cams but ran the numbers all
together making it at first hard to understand but once I noticed he also
ran the series names together I saw the numbers were done the same.
The SV stock grind IS hotter than the Series II Rally by a small amount.
Unfortunately, Rootes data does NOT verify lift height in old books but of
course with a cam in your hand you can simply measure the base circle dia
and subtract it from lobe height = lobe lift.
Joe...please recheck everything you have from your grinder data papers,
incl. what they suggest as valve clearence settings, put it on the LIST and
I will digest that info.
Also....you should phone that shop and personally quiz them about what they
did to the stock cam to create a hotter output and/or more torque AND ABOVE
ALL...ask if your grind data is for .050" lifted valve?????
As mentioned before.... we are alarmed at your .255" lift data .
However......we all may be getting into a twist over nothing.. because the
old Rootes data was for "the first moment" of valve movement, while the
current .050"
lifted position method, is assumed for your regrind.
Of course this is apples and oranges and no direct comparison can be made
until we get them all into "apples".
There is NO way to backtrack the Rootes data but we could easily determine
the new grind angles by simple putting a stick-on 360 deg. tape onto the
front pulley, then setting valves properly, then turning the crank
clockwise ONLY, and record all the "first moment" open/close angles. Once
this simple operation is done you can then compare apples to apples and
truly see how your regrind compares to stock.
Also....your grinder may have known the rockers are 1.39:1 ratio (thank you
Jarrid..my books are in Denver) and allowed for that??? but I doubt this.
In my experience....quoted cam lift data is actually the amount ON the lobe
and does NOT include rocker ratios, because some engines can employ various
rocker arm ratios and the responsibility is on the builder to measure
things correctly...and not punch into the pistons.
I believe you do have some used SV cams. If so, measure up the base circle
and lobe height and let me know the lift.
-------------------
All you listees who sent your pvt messages of thanks for me staying on the
mail longer than I had planned...your kind remarks are appreciated. I will
be fading away soon as many other activities require my attention.
Therefore please understand that I will not necessarily answer each request
seen on the list mail, when I see others giving you suitable answers. I may
from time to time show up when I think I have something of value.
Dick T.
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