6 replies to this topic

[davididen]

hi, been checking the timing on my 1293 kent md286 camshaft today, the inlet valve is fully open at 104 degrees, in the kent cam book it says inlet valve fully open at 106, will i be ok to leave it at the 104 degrees it is currently?

[HARBER07]

Yup should be absolutely fine on a road car.

[samsfern]

i normally try and get them within 1 degree or closer. I timed in my piper 649+ today, got it dead on, took a while and a few tries. Why not get it as close as possible? Youll get the most oomph out of the cam then.

[Stevie W]

It's always best to time a cam in a couple of degrees advanced from the manufacturers recommended setting as a new timing chain will stretch a little an retard the timing as it does.


Steve

[Mal_whitby]

It's always best to time a cam in a couple of degrees advanced from the manufacturers recommended setting as a new timing chain will stretch a little an retard the timing as it does.


Steve

Yep, I agree with that, if it's a new timing chain then 104 degrees will be fine. And if it's not a new chain and it doesn't stretch then a slightly advanced cam isn't such a bad thing anyway, it's better for mid range pull at the expense of a bit of power at maximum RPM, which is something that's worth having a million times over, instead of a couple more BHP at 6000RPM or thereabouts.

[samsfern]

ive never been told to time it in wrong to allw for "stretch" i said about this to piper cams when i picked up my new camshaft, and they said its not something theyd reccomend, so i just stick to what the cam manufacturers state, as thats where the cam will perform best. you dont buy a race cam, time it in wrong and expect it to put out the same power and be "softer", it just dont happen, it wont run as well as it should.

i spent 3 and half hours getting mine absolutely dead on, so i get the most out of the cam. it seems silly not to get it as close as possible whilst the oppurtinities there.

Edited by samsfern, 08 September 2010 - 07:59 PM.

[Pauly]

It is proven, when you measure the slap in a used timing chain, theres about 1 to 2 degrees difference. I timed mine in at 104 IIRC, I allowed 2 degrees for chain stretch thats with a kent 276.

I spent ages timing mine in aswell to get it spot on.

Edited by Pauly, 08 September 2010 - 07:57 PM.