7 replies to this topic

[Legend]

in haynes it ses set the crank to TDC, does this mean so clinder 1 is at TDC and then put the gears on so that both dots r facing each other?? do i have to adjust the cam at all?

thanks

[icklemini]

in haynes it ses set the crank to TDC, does this mean so clinder 1 is at TDC and then put the gears on so that both dots r facing each other?? do i have to adjust the cam at all?

thanks

yes, and although it'll work 'dot to dot' its best to 'time it in' - details in the vizard book or on a google search..

TTFN,
Dave

[Legend]

i know but i only need it for a couple weeks and dont know how to time it in,
anyone know what setting the crank to tdc is??

[icklemini]

i know but i only need it for a couple weeks and dont know how to time it in,

ok: either
(a)do it Dot -to -Dot which will work fine but may not be 'ideal',
(b)Learn how to time it in (its not that difficult and the write up in Vizards book is good at explaining this - also i think there are some stuff on the minispares site that tell you how to do it) - you do need a protractor, and a DTI gauge...,
©Or get it to someone who can do it and show you as well (whereabouts are you?? - local to northampton I can do it.,..)

anyone know what setting the crank to tdc is??

tdc is the crank setting...

The cam settings (in relation to the crank) are generally different for each type, Kent Cams are often 106 degs...

TTFN,
Dave

[Guess-Works.com]

Dot-to-dot i the only way of setting the cam timing on non-adjustable timing gears unless you use offset woodruff keys. If you want to build an engine with is to do any performance, then get an adjustable cam timing assembly.

I've had cams which when timed dot-to-dot have been 10 degrees out from specification.

[vasi]

Woodruff keys are fine, so long as you buy them from a place where you can physically hold them in your hand and measure them with calipers. We had a supposed 4˚ key be in fact 7˚.

Granted, the chain will stretch out after 1k or so, but still another key is of massively less cost than a set of adjustable timing gears.

[icklemini]

You can set it without the key - technically the key is to position the gear - not drive it - the driving force is done by the nut holding the gear on.. In certain race formulas where 'off set keys' and 'vernier gears' are outlawed, you set the timing without a key in there at all...

[dklawson]

Consider this another cautionary note.

Once you set your cam by dot-to-dot, DO NOT go back and expect the piston to be at TDC. I forget where the dot-to-dot method leaves things but it won't be #1 at TDC so don't be shocked by this.