Degreeing a camshaft and Cam timing Parts I & II (part II added)

[claymore]

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[ECU-MAN]

very nice thread, very indepth and informative.

good work.

[dsp26]

ow... my brain!!!! :(

on another note... very informative post... but sorry can't +rep you for it as i think i gave you one recently and it won't let me :p

[Limbo]

o my gwad, too much for my brain ;(

[JHMDA9]

Thanks :thumbsup: definitely worth a read.

[beeza]

WOW! Great work!
Subscibed.Will attack this on another day :)

[todaek9]

soo...Phase position...should it be...

Inlet/ex Cams - Advance or retard?


Just wondering...hmm...

but good read though...
long process to phase it at the optimum...

[todaek9]

I already got mine phase, but just to see whether there is other better combo that you can recormmend...

I think part of your explaination is true but there are more than just "more air coming in and out and partial vacumm" when it comes to phasing cams..i think its a process which is very hard to master...i've only seen one really good "cam phase" specialist, but he charge like few hundred bucks just to phase cams position, but you'll be surprise of the kinda power and response you gain...but oh well...better pay ones off than to go to many...Also, there are not many ard at all who know what they are doing...



That's one of Many Many subjects that could be covered in another post all by itself. With all the caveats on car weight, tires, Hp wanted, top rpm, FI or not etc. etc.

Think of cam timing as opening and closing windows in your house on a hot windy day. If you open one window only the outside air will come in at a fairly stable rate because nothing is "helping" it in (intake stroke).

But if at the same time you open the other window (exhaust valve) the air will come it the first window at a faster rate because escaping air going out the other window will create a partial vacuum pushing in more air. BUT some of the good air coming in the first window will ALSO be going out the second window.

So it's a balancing job that has to be managed correctly and there are so many variables it can make your brain hurt just trying to think about the effect one has on the others.

The easiest way to find out is to read or search all the car mags or forums to see if anyone has done it and you can glom onto their data or just try some yourself now that you are an expert after reading this long post.:p But be careful about checking the piston to valve clearance as it changes when you move the cams.

[TODA AU]

Nice write up...
Brownie points added. :thumbsup:

[krogoth]

very interesting...

nice write up....will try and comprehend later, lol

[Hipowerracing]

FYI.. you can set the timing of your camshaft using the another method ...
instead of running your car a million times on the dyno...

but very good article..

:)

[dynosaur]

nice info :)

thanks for sharing......

[dsp26]

bump!

this needs to move into DIY section!