KMS VTC Cam Gear Available Now!
King Motorsports has been building and tuning high performance K Series engines with high lift camshafts and high compression pistons for years. We have seen the need for different VTC cam gears which can be used to optimize cam advance /retard for maximum performance. The Honda OEM VTC gears have a mechanical intake cam advance limit of either 25 or 50 degrees. As more aggressive engine modifications are made, the VTEC engagement can be lowered but with the need for more cam advance.
While tuning solutions such as Hondata can be calibrated for more advance when used in conjuction with the OEM 50 degree cam gear, the real risk of piston to valve contact is present. There are OEM cars like the TSX that can benefit from this modified VTC gear with as little as intake, header and test pipe or any engine build where the maximum cam advance needs to be limited because of piston to valve clearance issues from bigger than OEM cams. Even though the software controls the advance, the nature of the oil pressure dictated advance can be imprecise. By modifying the VTC cam gear to mechanically limit advance to a set level, the risk of piston to valve interference is eliminated.
King Motorsports has designed modified VTC cam gears to limit advance to 30, 35 or 40 degrees. These cam gears are made from new OEM gears which are cut using ultra precise CNC machining that exceed OEM tolerances. Custom cut gears are also available upon request.
New Gear $300.00
Used Gear $250.00
Customer Supplied Gear $200.00
Call us at (262) 522-7558 for more information and to order.
Here is a dyno comparison, stock VTC cam gear versus the KMS VTC cam gear.
The King Motorsports VTC gear allowed VTEC to be lowered from 5200 to 3550 because the cam could be advanced further than the stock. In stock form the gear only had a max advance of 25 degrees. After the gear was installed the max cam advance was 40 degrees which allowed the VTEC RPM point to drop.
Car is an unmodified 06 TSX with Hondata FlashPro
The red line is the KMS VTC Cam Gear
The blue line is the stock VTC Cam Gear
Right-click the image to see it larger.
Check out the latest issue of Honda Tuning Magazine with additional info on the KMS VTC cam gears! Right-click an image to see it larger.
Here are finishing touches to another production run of King Motorsports K Series VTC cam gears. Available for purchase online!