Getting ready to slap in the Fidanza Cam Gears with a 272 in / 264 ex combo Cam Gear set up.

Here are my Questions:

The Fidanza Cam Gears come with two key holes , one at 9 o'clock (marked "EVO") , and one at 12 o'clock with no marking. I'm concerned that the "EVO" marking is not really related to the key hole that it is located closest to.

#1. I need to know from some one who has installed this exact series of gears, if the actual EVO install key hole is the "unlabled hole" at twelve o'clock. All of the photos that I have seen showing the factory gears, that have been set to TDC, have the key hole facing straight up at the twelve o'clock position.

If I put the Fidanza gears on using that unmarked hole, then the +/- 12 degree sliding scale markings show up at TDC position as well, which seems like the best place to have them for easy access.

If I use the hole that (at least seems to be) marked "EVO, the scale then will be at the 3 o'clock position, workable, but it just doesn't seem right. (According to the Fidanza people, the scale markings should be at 12 o'clock bt design)

ALSO:

#2. Does anyone know for certain if the HKS cam gear "key" (I'm referring to the little round knob that sticks out of the "cam gear end" of the cam shaft), ... is EXACTLY at the same position on the cam shaft as on the stock cams?

I don't have mine apart yet and I'm trying to think this through totally before I tear apart my ride, for obvious reasons.

Help

 

When using the FIdanza gears on the EVO you have to use the hole at 9 o'clock for the cam dowel. Use the white line on the outer ring above the dowel and the marks on the valve cover to set hard timing. The other dowel hole at 12 o'clock is for the 1g-2g 4G63 motor.

Jeff

 

Jeff, thanks for the reply. that's exactly what I thought when I ordered them. But when I compare the two "how to" installs ( Street Racing On Line's and Evomoto's)
They both show the cam tooth lined up with the timing marks on the stock cam gears. Anytime the timing marks are shown at TDC (12 o'clock of course) there is the cam shaft tooth, on each gear, pointing straght up to 12 o'clock.

If I place the Fidanza gears with the (9'oclock) tooth etched "EVO" at that position, I will have the timing +/- scale at 3 o'clock. Workable, but it doesn't make sense.


(A Fidanza rep wondered if they had been etched incorrectly when I explained it to him)

I'm really trying to understand where I'm not getting this, but if the +/- scales are supposed to be at TDC with the gear's timing mark, then cam tooth would have to go in the 12 o'clock key hole.

If you can clear this up for me, please help.
Thanks again!
Dean

 

Dean ..

that is exactly right. The adjustment markings will now be at 3 oclock. No it doesnt make sense. They've just sold those came gears for the dsm for yrs. Now they went back and redrilled for the evo. Just understand .. you dont have adjust the cam gear at 3 oclock, you can move the gears around to TDC ( top dead center ) so the markings are at the top so you can see them. Hope this helps..

Mark
Turbotrix

 

Mark thanks to both you and Jeff,

I think that I was just being too **** about the TDC being the center of my Universe instead of just the 4g63's Universe.

Just out of curiosity:

Is it because of a difference in the fittings behind the gear, that the additional hole was needed?

I haven't removed my gears yet, and that is the only reason that I can think of for the need for a different hole. I noticed a rectangular slot in the hub on the reverse side of the gears and kind of surmized that it must have some to do with that, or some other hidden difference on the reverse side of the gears.

If you have time to answer. great, if not, THANKS! for helping out and your patience!

Dean

 

Im not sure if i understand you.. I never looked behind the gear. the need for the different holes is this.. On the 4G63 you align the timing marks at 3'oclock and 9' oclock. Now on the evo .. The timing marks are at 1'oclock and 11oclock. The dowels on the cams are still pointing up, but the timing marks are completey diff. This is why the holes are 90deg out ..

Mark
Turbotrix

p.s. i hope i didnt confuse you..