AZ89LONGBED

iTrader: (3)

Any hands-on experience with advancing valve timing on the EB 268 cam?

I have the street-RV EB head & 268 cam, 9.5-1 compression, LC header, 2-1/4 exhaust.

My powerband is much broader than before, but it seems to peak a little higher in the RPM band, roughly around 4,000 RPM.

My question is: Who has any real experience with 2-4 degrees of advanced valve timing with a similar setup? It`s a little late to call EB, but I will tomorrow afternoon to see what he says.

BTW- I have searched & I did read the 4x4wire thread by EB, but I am curious if anyone has real experience doing this.

Volcom

I bought an LC Engineering adjustable cam gear when I rebuilt my 22RE. I also used a stock head, cleaned it up, 3-angle valve job, cleaned up and ground the valves, shaved the head 20 thousands and used EB's 268. I degree'd the cam and it called for 2 degrees of advance (makes sense since I shaved it 20). I dialed in 3 more degrees of advancement making it a total of 5 degrees. It seems to work so far. I didn't have much seat time behind a stock 22RE.

Mine seems like it runs out of steam @ 4K.

AZ89LONGBED

iTrader: (3)

FAR OUT VOLCOM! This is the kind of info I wanted, I think 2 degrees of total advancement is what I need ( new head casting).

This may sound really stupid, but does your chance of pinging go up or down when advancing the valve timing?

I know were not talking ignition timing, forgive my ignorance on this, it may not even make a difference...

abecedarian

in general, advancing the cam will move the powerband lower... it shouldn't cause detonation, but could, and that does mean you will have to retard your timing.

javadoody

ted will say add 2. i'm at 12btdc, got power no ping.