TracTuff VTC Limiter

Description

The TracTuff VTC Limiter is yet another innovative product designed with the average consumer in mind. I wanted to offer a cost-effective solution for limiting how much cam advance your motor sees once clearances have been confirmed, and what we ended up with is undoubtedly the easiest way to do so.

We assume that most K series engine owners have a 50° intake cam gear, so it made sense to limit the 50° gear rather than ask customers to go through the trouble of finding a 25° TSX gear and having it modified. Not to mention that process is tedious… as you must find/buy a 25° RBB gear, pay to have it shipped, find a capable machine shop to handle the modification and ship it to them, pay their fee, and ultimately pay for the return shipping. Sounds expensive, time-consuming, and a total headache/ inconvenience!

Our VTC Limiter is manufactured from precision-ground bearing steel, finished to exacting tolerances, and then heat-treated to a hardness of 60-62 Rockwell C. The limiter works by inserting a pin into a specific cavity in the 2002-2011 50° VTC gear. The pin does not have a specific position within that cavity… as it was designed to sit/ float freely until the engine is started. Once the engine is in motion, the pin is positioned where it needs to be to be effective (via centrifugal force), ultimately limiting the amount of advance the gear can achieve as it sweeps forward. Regardless of what the map/ tune calls for.

Please note that it is not necessary, but if you have any concerns about the pin moving, you may elect to have the pin welded in place once you have confirmed your engine’s specific clearances. I personally say it is NOT needed because, in the 16 years this product has been in service, I have never had any issues, nor have there been any reported issues with those sold. Truth is… the pin really doesn’t move “FREELY” once the engine is in motion, centrifugal force actually locates the pin exactly where it needs to be, and it only moves once the engine comes to rest. The same principle is in effect when you see people on that spinning carnival ride, the one where people are standing against a padded wall, without any safety belt or locking bar, and you become pinned to the wall as it speeds up! Yeah, that ride! Same concept.

NOTE: There are absolutely no returns or refunds on VTC Limiters. For more information on VTC Limiters and how to use them to clay your engine, please check out our Engine Claying Kit.