
The same header was used in the tests, and the DC 4-1 was chosen because it is the most common. Adequate tuning was made on each cam because of the Apex V-AFC. The head was totally stock, meaning it was not milled, and had no port and polish at all. The intake manifold was a Skunk2 with an Iceman intake. These runs are with CAT on. The graph makes sense. The JUN cams have more duration, so it made more peak HP. The cams have the same lift on the VTEC cams..(at least on the intake cam). I am probably going to have to recommend the JUN cams, if you want peak HP for several reasons.
#1 They are much easier to tune....the VTEC point on the JUN's was around 5600, while the Toda cams were around 6500. Also, the primary lobes are much bigger on the Toda cams, and this requires some micro tuning at low RPM's for the car to idle good. And even so, the car does not idle the same as before, its slightly rougher. Not bad, just not the same.
#2 Due to the high VTEC point of the Toda Cams, aftermarket tuning equipment to change VTEC point is required for maximum potential. But, you could use a P28 brain with the JUN 3's, or any brain with a high VTEC point, and it would be ok. You will need a fuel pressure regulator, which I suggest you get for both.
#3 Since the Toda Cams are larger, in just about every aspect except the lift on the intake cam, it makes sense that they will put more stress on your valve train. Note, you CANNOT use Web Valve train with Toda cams. You must use Toda valve train. This is costly, but well worth it, they last a long time and I have heard of no problems. With the JUN cams, you can use WEB or any aftermarket springs with them because they are not a big cam. I consider them medium size.
#4 They are both very expensive cams. Decide if you want these things before you make the commitment. They require you to rev your motor very high to get the most power out of them. And as you know, the higher you rev your motor, the shorter it will last. But that's drag racing for you...
I think this was a good test because the head was not ported. Also, if you are considering head porting, make sure the head porting company has the cams you are going to use. This is important to improve airflow appropriately. There are several motors running over 200 HP at the wheels with Toda cams and a bunch running JUN cams. Make your decision...they are both good racing cams.
Jeff