www.dodo-upgrades.nl

saxophonias wrote:Nice! Joris has said that with stock cam you can play with the cam timing (having an aftermarket cam gear) and get some extra power. Is this true?

A friend of mine did this on his stock ej9 with some bolt ons ,and he did got like 5bhp more with the cam gear.

anything more specific regarding values?

very interested on this values, i did my mini me and got a aem cam gear. I do feel thet with the current setup i have NO low and mid power at all, would like to have some gaines over there, hope that changing the timing would give me better results, any ideas?

Maybe you could advance your timing like the article says but be carefull you dont want to cause detonation!

In my experience, it is more complicated.

Usually I end up retarding the cam timing from stock (keeping ignition effectively the same), giving more power over the entire range of rpms, about 3k to 7k. Once I retard too far only above 7k I gain a a few hp, at a loss of many hps over the entire 3k-7k range all of a sudden. And this is less compromising as stated before, it really is a hard drop over the entire range giving effectively only one optimum and no real compromise between mid torque and high-end power. That is just my D-series experience with both non-VTEC and VTEC cams.

Very usefull, maybe now i can set the timing right. Thnx Nick!

Dodo Bizar wrote:Once I retard too far

Please explain what does it mean 'too far' ?

I started retarding the cam bit by bit on a dyno. After passing the 'Goldy Locks zone' all of a sudden power started dropping everywhere. This I call 'too far' since I only loose power after that point and will definitively loose fuel economy even harder. I did not mean I got any damage or so.

Dodo Bizar wrote:...after passing the 'Goldy Locks zone'

how many degrees on the cam gear was it for example ?

On the cam gear I like to work with steps of 2 deg, which is 4 on the crank! So from my ideal setting I just retarded something like that more, maybe 3 deg and power was fading already.