"HEY GRUMPYVETTE??
i can use a TDC Whistle to temporarily replace my compression gauge ,to see where the compression ends at, to locate true TDC (top dead center)
I had planed on doing the screwdriver method, but Id like to do both if the whistle is worth the trouble.
Thanks!"
(btw when using a spark plug in the cylinder head style piston stop tool
if your standard strait probe/stop tool is not touching the piston due to the shallow enterance angle
youll want to remove ALL the spark plugs and back off ALL the rockers
on not only cylinder number one ,
but all the cylinders ,
so you can feel the engine as it moves/rotates
yes youll need to adjust valve when your done finding TDC
http://garage.grumpysperformance.com/index.php?threads/adjusting-valves.196/
and make sure the cars not in gear so that the engine can be rotated much more easily when done manually,
this prevents the valves in cylinder number one from opening and removing the other spark plugs greatly reduces resistance due to compression.
yes your problem, is FAR from rare and in fact its very common most guys simply take an old spark plug,
put it in a vise and bust out the old porcilian center and re-thread the interior of the remaining metal hex.
or buy a tool like comps
https://www.summitracing.com/parts/...-_-comp-cams&gclid=CJ3wuuyJ8tACFYOFswodCKYKvw
you then buy a 6" threaded bolt, screw it into the plug body
with similar thread pitch and thread that fully threaded bolt about 3" of that bolt entending past the spark plug base,
and heat and bend it with your propane or acetolene torch in a shallow curve,
now BRAZE or weld a cheap socket head wrench to the bolt head so it can,t move off the bolt and indexed so ,
its pointing strait up when the bent internal part of the piston stop points strait down ward
RELATED THREADS
http://garage.grumpysperformance.com/index.php?threads/cam-degreeing.9010/#post-35474
http://garage.grumpysperformance.co...et-it-to-last-cam-install-info.90/#post-31431
http://garage.grumpysperformance.co...ter-1-for-timing-ignition-cam.966/#post-18999
http://garage.grumpysperformance.com/index.php?threads/turning-your-crank-manually.5933/#post-18274
http://garage.grumpysperformance.com/index.php?threads/cam-degree-equipment-tools.1759/#post-4441
now you can stick the bent bolt into the cylinder, thread the bolt body into the head and once its seated in the head,
you can easily index the bent part to point down into the cylinder where it will contact the piston as it rotates
which a strait bolt would not do due to the shallow enterance angle
be aware that you need to be able to feel the engine stop when it contacts the probe tip, if you don,t manually turn the engine fter first removing the other spark plugs ,
and backing off the rockers the resistannce to rotation the valve train and compression have will make felling the piston contacting the piston stop difficult,
and you damn sure don,t want to bend or break the piston stop.
http://www.shoptoolsshoptools.com/shopexd.asp?id=970
darn, thats funny, I needed a good laugh...your asking if finding a precise point in rotation of the crank TDC TOP DEAD CENTER, can be located with a screw driver or air flowing out of the spark plug hole???, (surprisingly the answers is ,yes you can, if getting within 4-8 degrees is just fine as a guess work start point,... if just getting in the ball park to hook up a timing lights the goal ,yes it works)
a pistons only moving a couple thousands of an inch per degree of rotation as it approaches and passes thru and retreats from TDC, and if you don,t have a precise, and repeatable point to stop the piston travel, to measure from your wasting your time,if the accuracy needed is more than that, if the goals more precise that just getting close, youll need a degree wheel and a piston stop.
http://www.iskycams.com/techinfo_index.html
http://boxwrench.net/specs/chevy_sb.htm
READ thru these links ,THESE, should make things far easier to understand
http://forum.grumpysperformance.com/viewtopic.php?f=52&t=966
http://forum.grumpysperformance.com/viewtopic.php?f=70&t=1015&p=6237&hilit=timing+tabs#p6237[/color]
i can use a TDC Whistle to temporarily replace my compression gauge ,to see where the compression ends at, to locate true TDC (top dead center)
I had planed on doing the screwdriver method, but Id like to do both if the whistle is worth the trouble.
Thanks!"
(btw when using a spark plug in the cylinder head style piston stop tool
if your standard strait probe/stop tool is not touching the piston due to the shallow enterance angle
youll want to remove ALL the spark plugs and back off ALL the rockers
on not only cylinder number one ,
but all the cylinders ,
so you can feel the engine as it moves/rotates
yes youll need to adjust valve when your done finding TDC
http://garage.grumpysperformance.com/index.php?threads/adjusting-valves.196/
and make sure the cars not in gear so that the engine can be rotated much more easily when done manually,
this prevents the valves in cylinder number one from opening and removing the other spark plugs greatly reduces resistance due to compression.
yes your problem, is FAR from rare and in fact its very common most guys simply take an old spark plug,
put it in a vise and bust out the old porcilian center and re-thread the interior of the remaining metal hex.
or buy a tool like comps
https://www.summitracing.com/parts/...-_-comp-cams&gclid=CJ3wuuyJ8tACFYOFswodCKYKvw
you then buy a 6" threaded bolt, screw it into the plug body
with similar thread pitch and thread that fully threaded bolt about 3" of that bolt entending past the spark plug base,
and heat and bend it with your propane or acetolene torch in a shallow curve,
now BRAZE or weld a cheap socket head wrench to the bolt head so it can,t move off the bolt and indexed so ,
its pointing strait up when the bent internal part of the piston stop points strait down ward
RELATED THREADS
http://garage.grumpysperformance.com/index.php?threads/cam-degreeing.9010/#post-35474
http://garage.grumpysperformance.co...et-it-to-last-cam-install-info.90/#post-31431
http://garage.grumpysperformance.co...ter-1-for-timing-ignition-cam.966/#post-18999
http://garage.grumpysperformance.com/index.php?threads/turning-your-crank-manually.5933/#post-18274
http://garage.grumpysperformance.com/index.php?threads/cam-degree-equipment-tools.1759/#post-4441
now you can stick the bent bolt into the cylinder, thread the bolt body into the head and once its seated in the head,
you can easily index the bent part to point down into the cylinder where it will contact the piston as it rotates
which a strait bolt would not do due to the shallow enterance angle
be aware that you need to be able to feel the engine stop when it contacts the probe tip, if you don,t manually turn the engine fter first removing the other spark plugs ,
and backing off the rockers the resistannce to rotation the valve train and compression have will make felling the piston contacting the piston stop difficult,
and you damn sure don,t want to bend or break the piston stop.
http://www.shoptoolsshoptools.com/shopexd.asp?id=970
darn, thats funny, I needed a good laugh...your asking if finding a precise point in rotation of the crank TDC TOP DEAD CENTER, can be located with a screw driver or air flowing out of the spark plug hole???, (surprisingly the answers is ,yes you can, if getting within 4-8 degrees is just fine as a guess work start point,... if just getting in the ball park to hook up a timing lights the goal ,yes it works)
a pistons only moving a couple thousands of an inch per degree of rotation as it approaches and passes thru and retreats from TDC, and if you don,t have a precise, and repeatable point to stop the piston travel, to measure from your wasting your time,if the accuracy needed is more than that, if the goals more precise that just getting close, youll need a degree wheel and a piston stop.
http://www.iskycams.com/techinfo_index.html
http://boxwrench.net/specs/chevy_sb.htm
READ thru these links ,THESE, should make things far easier to understand
http://forum.grumpysperformance.com/viewtopic.php?f=52&t=966
http://forum.grumpysperformance.com/viewtopic.php?f=70&t=1015&p=6237&hilit=timing+tabs#p6237[/color]
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