I recently installed the last performance mods that I am going to put on my '02 Taco. Gadget @ underdog recommended a shop in Southern California who could Dyno & tune my truck using any of his tuning products sold on urdusa.com
I spoke to the guy and asked him if he'd be willing to come in on a Saturday for me so I don't have to drop my truck off for a day and make the drive twice. He agreed and proposed that if I could round up a few extra people who might like to get tuning done on the same day he would give a price break. I'm sure even 5 or 10 would be fine but I told him I'd post it up and see how many people might like to sign up for a Dyno Day.
My original estimate to come in by myself on a Saturday was $400. I will be posting more details on the price breaks per number of trucks soon. I do not have a day set yet.
Here is a brief description from the guy who does tuning about what he has to offer for Toyota owners:
What we can do for the toyota truck communtiy is if any ones truck has
modifications done to them "Supercharger,exhaust, intake, ect" we can put the truck on the dyno and check the truck for power and torque. We can also check the air fuel ratio to make sure the truck is running correctly. We also have the ability to tune many different programmers while on the dyno. The main one that people use is the underdog racing piggyback computer that will allow us to properly tune the vehicle to optumum power and reilablitly. Even if the truck has just a simple intake and exhaust I would recomend one of there MAF calibrators as we have seen as muck as a 12whp and 10lb of torque with using them.