[Aperformance]

The original 5.7 truck we used for dyno testing didn't have a tow/haul mode switch which locks the converter, so we were unable to get low end numbers on our runs. We were only able to get accurate readings from about 3800-6000 rpm's because converter lock up was not achivable without the tow haul mode feature.

It turns out that this recent truck tested got the full range from 2000 RPM - 6000 RPM by activating the tow/haul mode. This evidently locked the converter from the get go for obvious towing duties and did so on the dyno as well.

This chart was given to me from the same company that did our testing. I spoke with Mike from AMS and he explained that one of our customers Dan finally tested his truck with Zoomers. Back in July Dan who owns an automotive shop right here in our complex along with AMS came to us for a cat-back. He suggested doing his own dyno runs to compare them with ours. He went ahead and did his base lines and now 4 months later here are the results.

I did ask Mike from AMS why we didn’t lock the tow mode and he recalls there not being one on that particular truck. He meant to tell me on Dan’s truck he was able to achieve full range on the dyno but never got around to it. What are neighbors for? Ha ha.

Either way the numbers are quite close at the top end where we tested on our runs and the bottom end where Dan tested, well, it’s quite impressive. For all you worrying about low end torque loss worry no more, here are the results…..

Dyno chart Dan's Tundra (tow/haul activated)

Stock Base Line: Blue

Zoomers: Red