7-30-08.

Basking in the glory of finally having two days off from work, I took a cam gear down to Joe and had him add a #4 hole to my stock gear.  He made a copy of the Nismo comp gear from a while back, which is a lot cheaper than buying the gear, especially since Nismo is now defunct.

Anyway, from the old Nismo catalog, I had Delta cams regrind a rally spec cam.  There was some duration issue, as it was supposed to be 270 degrees and it ended up being 222 degrees.  I think Jones botched the order and heard 217 when I said 270.  Anyway, aside from a little less duration, it's basically the Nismo cam.

The Nismo L7 Rally cam is ground on 109 degree lobe centers with .475" lift and 270 degree requiring .160" lash pads which were sourced online from Z Therapy.

Starting out with #2 hole sucked.  Moving to #3 hole got the cam coming on hard at about 4000 rpm.

Today's #4 hole (off the Nismo gear copy) should be 11 degrees advanced, though we can't remember exactly and it's not that important.  And actually, I was just looking through the old Nismo catalog and the adjustable hole gear is supposed to go to -12 degrees.  Bottom line is for this cam, #4 hole is where it's at.  Much better response in the 3-3500 rpm range and pulls hard to 6200 where I've arbitrarily decided is the limit guessing from the butt dyno and valve spring rate.  Once I get it on an actual dyno, I'll see where the hp curve ends.

Without further ado, here are pictures.

Another important thing to note: Cam gear shown here came with aftermarket timing set.  Got another gear to modify that was made in Japan, and the quality sucked.  It was also the multi-hole style.  As a result, I ended up using a spare OEM ancient cam gear off a spare L motor.  They don't really wear the sprocket much, so I'm not worried about it.  The main thing is the style of gear.  The aftermarket stuff seems to be multi-hole and fairly flimsy, with cheap castings.  You'll notice the altered gear two pictures up has only 4 holes and is much better quality despite being around 30-40 years old.  (Not sure which motor I yanked it from)