Originally Posted by Knightmare69

Are there any gains to be had? What exactly are the benefits of running the JDM camshaft?

Originally Posted by Jim Truett

I was using the 59100 in my D15B until yesterday. Basically, the 59100 will give you a little more power on the small lobes, but it seems to me that the stock D15B cam makes more power overall. There are two other issues with the 59100 cam as well.

1. The cam makes the valvetrain very noisy. ZEX/COMP recommend setting the lash at .008 Intake /.010 exhaust just like stock, but it sounds horrible. Even when I had mine at .004/.006 it was still excessive. The stock cam is extremely quiet by comparison. There may be insufficient ramp angle on the backside of the lobes, and this leads to the valves shutting too quickly and rocker arm chatter.

2. Timing. Both the 59100 and 59300 are made for a D16, so I will assume this finding relates to both models. The deck height of the D15B is shorter than the D16, so the cam timing is going to be off with the aftermarket cam. I calculated this to be about 9.8 degrees, or nearly a tooth on the cam sprocket. This is fine as far as timing the cam to the crank is concerned, as it still can be set straight up. The distributor will need to be advanced to account for this though, and I was unable to get mine set at 16 degrees BTDC even though my distributor was fully advanced.

With the stock cam the VTEC growl is not as pronounced, but it pulls more smoothly than the 59100.

My personal opinion of the 59100 for use in the D15B is . I will need to experiment with it in a D16Z6 to see if some of the issues still exist. They are both P08 heads, so I'm sure it would still be noisy.

Originally Posted by SOHC_MShue

The zex 59100 cam is not gonna make much if any power over that stock d15b cam. I would pm member eg6ajk. He had the zex 59300 cam in his d15b tuned and it only made 4whp so I seriously doubt the 59100 would do ****. I would probably consider going with a slightly more agressive cam than the zex 59300 for a d15b.

Originally Posted by eg6ajk

indeed while, as in '01, I did few test, and run the cam in my EG, basically E/H/ECU setup made 117whp, after the cam top end jumped to 121whp, gains past 6k rpm good to about to 7.5k rpm. This was with no tuning, just a simple drop in.

car at the dyno while back.


dyno of different ECU setups (from P28 XS to RPT P08) on the D15b


my findings on the 59300 are:
-its noisy, regardless of the valve settings
-power improvements only felt past 6k rpm
-timing off by about 5degrees (either way (adv or ret) will depend on install)
-overall I would not buy another one I would opt for Exo or Crower stage 3 grinds or better