Jason was quick to point to the Bisimoto Level 2.4 as the best overall cam in this test for most street/strip D16 turbos. Nearly identical spool to the stock cam, with massive gains from 5,000 rpm up, a solid choice. The Bisimoto Level 3.6 is his top dog for a drag-only application, delivering 20-plus hp over the competition while continuing to deliver the goods above 9,000 rpm for super-high-revving applications most likely seen on purpose-built drag engines.
It's also clear that when you're generating 380-plus wheel horsepower from a single-stick D16 you are doing something right. This is a real world car that's street driven on pump gas and the results illustrated here are supremely attainable for any Honda enthusiast.
ZEX 59300
335 whp/262 lbs-ft torque
(+35 whp, +8 lbs-ft torque)
Comments: Very good idle quality, good overall power. Jason says, "The 59300 is a good overall cam for the average street car that may have some drag strip use in the cards." Identical spool to stock cam, no power loss anywhere, good gains from 5k rpm up. The 59300 comes off as a solid, well-balanced bumpstick. Note: An odd characteristic of this cam is that at 8,000 rpm there is a large drop in power. Volumetric efficiency drops significantly at this point, but it pulls through and regains efficiency at higher rpm.
Crower 2 Turbo
347 whp/250 lbs-ft torque
(+47 whp, -4 lbs-ft torque)
Comments: Good idle quality, poor low-rpm power, good high-rpm power. Jason quipped that this cam is good for a drag application, but not recommended for a street driven car. Very comparable to ZEX 59500, but the 59500 makes more power from 6,800-8,100 rpm. Loss in power up to 5,300 rpm, equal to stock from 5,300-6,400 rpm, huge gains above 6,400 rpm. Also, this cam experiences a 350-rpm loss in spool time versus stock.
ZEX 59500
363 whp/250 lbs-ft torque
(+63 whp, -4 lbs-ft torque)
Comments: Decent idle quality, poor low-rpm power, good high-rpm power. Jason commented that this cam is more suited to a drag application, not recommended for a street driven car because it loses power up to 6,400 rpm then delivers huge gains above 6,400. Street engines spend a lot of time below 6,400 rpm and this cam's lack of punch will be felt on the road. Also, this cam experiences a 350-rpm loss in spool time versus stock. Note: This cam required 2 degrees of retard.
Blox Stage 3
365 whp/252 lbs-ft torque
(+65 whp, -2 lbs-ft torque)
Comments: Good idle quality, poor mid-rpm power, good high-rpm power. This cam is okay for a drag application, not recommended for a street driven car. Note: Above 8,500 rpm, power dropped like a rock. Not recommended for applications that will rev above 8,500 rpm. Gains realized above 6,600 rpm up to 8,500; this narrow 1,900-rpm powerband is indicative of drag cams. Engine experiences a 100-rpm loss in spool time versus stock.
Bisimoto Engineering Level 2.4
381 whp/264 lbs-ft torque
(+81 whp, +10 lbs-ft torque)
Comments: This cam is designed for street/strip applications with a mildly lopey idle, and idled at 15 in/vac. Jason says that this cam is his pick of the bunch for a hot street/weekend warrior strip car, and the slightly lopey idle sounds great and hints at the power lurking beneath the hood. Spool was within 100 rpm of the stock cam, with great gains above 5,000 rpm. This cam outperformed all other cams in the test up to 8,000 rpm with massive mid-range and top-end gains.
Bisimoto Engineering Level 3.6
384 whp/261 lbs-ft torque
(+84 whp, +7 lbs-ft torque)
Comments: This cam is designed for pro full race applications with a very lopey idle, and idled at 15 in/vac. This is Jason's cam of choice for a full race build, and is what he uses in his own race motors. Spool was within 100 rpm of the stock cam, with huge gains above 6,400 rpm. This cam performs very similarly to its slightly smaller brother, but made superior high-rpm power above 8,000 rpm.