![]() The curve is also the flattest & smoothest of the test. ![]() The 777XE made the most horsepower by a pretty wide margin, but it also made the least amount of peak torque. This pattern is quite a bit different than the others. The WM8-777XE is somewhat unique among this group as it was designed as max effort bolt-in. The extra exhaust duration also gives it a more aggressive idle. It trades a little early torque from the XE for some more high RPM horsepower. The WM8-22XD cam is essentially a hot rodded up version of the WM8-22XE cam, which gives it a bit more attitude. ![]() Its very responsive and really shines over the entire rev range. The XE did not make the highest peak numbers, but it puts the power down early and keeps pulling late. This cam not only made the earliest torque of the test, but also the best average power throughout the curve. The WM8-22XE is one of the most popular M8 bolt-in cams available. This cam also shines through the midrange and puts up big torque. It was slightly more rev happy, but was otherwise fairly identical. The CR-483 tested very similar to the CR-480. Where it sacrifices a bit of early torque and high RPM power compared to some others, it puts that power right in the middle making it a really fun cam. This cam really shines around 3,000-4,000 RPM. It made the best peak torque number of this test and is especially strong through the mid-RPM range. The CR-480 is a well known performer with the M8 crowd. This cam could potentially be a little soft on the bottom with some exhausts. It showed the second highest horsepower of the group and is right up there in torque as well. With a little RPM, the WP-475 hits especially hard and really likes RPM. The Ward WP-475 is the newest cam of the group and straight from Rick Ward’s playbook quick acceleration with an emphasis on horsepower. This cam is on the high side of the price spectrum, with the highest retail price of the camshafts tested. Really nice all around camshaft and we especially like the smooth power curve it produces. Star Racing’s 30/30 has become a very popular bolt-in cam that offers great gains in horsepower & torque on both sides of the curve. One aspect we really like of the Red Shift cam profiles is the attention they give to the open & closing ramps, which really helps minimize valvetrain noise and wear. This cam delivers a great combination of torque and horsepower and it comes on nice and early. Zippers originally designed the 472 to complement the SE engine kits, however it lends itself very well as a stock bolt-in. A high point of the 475 cam is its price, which is the lowest of each of the cams tested, a great value. Its huge amount of exhaust duration can make the 475 a bit soft on the bottom though and tuning can be a bit finicky (pick your exhaust wisely!). ![]() This cam has a really good mid-range hit and pulls through the upper RPM’s well. The S&S 475C may have been around for a while now, but it’s still a solid performer. The chart below represents an overlay of each of the cams tested The following cams were included in this test: The tests were performed over a four day period in our climate controlled dyno cell in no particular order. We tuned the bike after each cam install with Dynojet Power Vision. The bikes performance modifications included a H-D Ventilator Stage 1 air cleaner with Fuel Moto BMF air cleaner element, stock throttle body with S&S 55mm intake manifold, Fuel Moto 5.5 fuel injectors, Jackpot RTX full length 2/1 exhaust system. Our test bike was a 2022 Harley-Davidson Road King equipped with 114″ engine and RDRS. The grinds tested are marketed as performance cams for 107″, 114″, & 117″ engines. In our latest 2023 round of Harley-Davidson Milwaukee-8 cam testing, we installed and evaluated 10 of the latest, most popular bolt in M8 camshafts.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |