Tony's speed tips.
Cam:
Q: Without retiming the camshaft, what
are good valve timing settings to shoot for?
A: By using a degreed tape on the crank
pulley or a degree wheel, you can get your valves to open and
close at the same locations. This is the most accurate method of
degreeing in valves. With a stock camshaft, I have had very good
results with trying for the following valve timings:
IVO@15aTDC,
IVC@63aBDC, EVO@38bBDC,
EVC@15aTDC,
IVC=.020" & EVC=.020".
Q: How can I make a degree wheel?
A: Photo copy the "30" scale
from your Engineering Scale and reduce it so that zero degrees
meets 360 degrees when the photocopied scale is wrapped fully
around your crank pulley. This will give you a degree wheel of
the most accurate and most econmical type. I use scotch double
side sticky tape for this and wrap the outside with regular
scotch tape. Place the tape where the fan belt doesn't go.
Remove a sparkplug and determine where
Top Dead Center (TDC) of the #1 piston is. Fasten a wire to one
of your timing case bolts for a timing index marker (like on a
modern auto with timing marks and pointers).
Q: You have spent countless hours
studying cam timing. Can you give me an idea of the possible
results of different settings?
A: With stock Model T camshafts not
reground, and made after 1914 +/-, set all valves with adjustable
pushrods to clearances of 0.015" if the cam has uniform
lobes, (with the cam not advanced nor retarded.) If the cam has
non-uniform lobes, try to achieve IVO@13ATDC, IVC@68ABDC,
EVO@40BBDC & EVC@20ATDC for better top end. Don't use less
than 0.011" or the T could start coughing and catch a bad
cold. This is good for parades too!
With stock Model T camshafts not
reground made after 1914 +/- set all valves with adjustable
pushrods to clearances of 0.020" of an inch if the cam has
uniform lobes. (with the cam not advance nor retarded.) If the
cam has non-uniform lobes,try to achieve IVO@15ATDC, IVC@63ABDC,
EVO@38BBDC & EVC@15ATDC for better low end torque. Don't
exceed 0.025" clearance, as the T will start to run poopie.
This is better for pardes.
With stock Model T camshafts not
reground made after 1914 +/- , ADVANCE the cam 1 tooth counter
clockwise, set all intake valves with adjustable pushrods to
0.020" and the exhaust to 0.008" if the cam has uniform
lobes. If the cam has non-uniform lobes, try to achieve IVO@0TDC,
IVC@47ABDC, EVO@75BBDC & EVC@15ATDC for better power
everywhere but, poopie idle. NOT for parade cars
With Richard Carnegie's (509-891-6461)
high speed (high lift) camshaft "3041A" (sold by lots
of businesses, but get it from Strong Engine) set all intake
valves to 0.030" clearance and all exhaust valves to
0.035" clearance (with adjustable pushrods) Carnegie's cams
have uniform (perfect) lobe profiles. Do not advance or retard.
Try to achieve IVO@4ATDC,
IVC@65ABDC, EVO@45BBDC & EVC@12ATDC for better lower and
beter top end power. This setup will be "clattery"
sounding and is just fine for parade cars too, best of both
worlds!
We have tried cam profiles out of all
kinds of modern cars, Chevys, Fords, import cars, etc., but they
don't build good power in the 1000 to 2500 RPM ranges where the
Model T needs to be. (This seams weird to me because the newer
cars run in this RPM range when in overdrive!!!!! and could be
making better mileage there too!!!
Q: What modern valve set up works in the T?
A: Posted by Steve Coniff on October 04, 2000
The Manley part number for the 302 and
351 Ford valve that works well in a "T" is A2223. This
valve has a chrome plated stem which gives superior wear
qualities as well as a hardened tip on the end of the stem. The
stem is 11/32" (.341 actual diameter) and is longer than the
Chevy valve stem.
Retainers are available from Ford
tractor stores only. The Ford part number for this retainer is
8BA6514 (4 retainers per bag). This retainer fits the 8N tractor.
Model T valve springs are a perfect fit in this retainer.
The tractor retainer and the 302 valve
use the standard two piece single groove keeper. Ford and Chevy
use the same keepers for the 11/32" valve stem. Keepers can
be purchased at any parts house. The TRW part number is LK-127
and the Pioneer number is PF-555-HD. Check with your machine shop
first before you purchase new keepers. Machines shops generally
have lots of extras around they will give you. I hope this helps.
Steve
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