I agree it goes along with what I said earlier. If it was that cheap to do why wouldn't the factory do it. The custom tune designed to make use of your changes ( ie cam or valve of injector changes) that makes sense and that's why its $400. But it is still a chip and not a resistor.

 

No, both of those pics show resistors inside.

 

I've had the TBS on there for about 2 or 3 tanks now and my mpg went up from 12 mpg to 19mpg. Well worth the money!! I'm just lookin to make this truck as fast and fuel efficient as I can and drive it till the wheels fall off, any ideas?

 

But then again, I also put on 8.8mm Accel plug wires and an MSD streetFire coil all at the same time, could be all three. Either way my mpg went way up and I'm not complainin, huge power and throttle response increase too.

 

Okay, not gonna flame you, and I did ask about the TBS, but the plug wires and ignition parts by themsves will not achieve that much gain unless you had broken contacts and missing wires. I've never read more than a 3mpg gain with a TBS. I dumped a ton of maintenance into my 4.9 and only got her up to 21mpg, occasionally 22 if I behave. I gained allot of felt power. If I had to bet, with the completed maintenance which was about 50k miles over due, tire pressure, efans, k&n, synthetic fluids, new bearings all around and I have 2.73 gears, the best hwy gears available in our trucks for mpg, probably 20hp. Sounds like allot, but I really neglected my truck for a while. Needless to say, I played hard! 0-60 tests, top speed test, lot's of idling while tuning and getting past the sound of the modded exhaust and K&N, it took a little while to behave long enough to get a good mpg read. I probably got 10mpg for the first few days after I found that I could once again pass people on the highway! Lol

That's allot of mpg gain for any 3 mods by themselves. Keep us updated on your numbers. I've got some household expenses to take care of first, but I still have a TBS on the radar. My miles are all hwy at steady speeds and If I gained 1mpg for the cost of the TBS, it would be worth it.

 

I'd like to see some hard numbers on this too. Its another mod that I am really skeptical about. When I first saw them they looked great and I know what they can do for a carbureted engine. When I thought it through however I simply can't see how 1/4" of spiral cut aluminum can swirl the air enough to cause any difference. Considering the air flow almost immediately hits a disturbance and is split and turns a corner then splits off to separate runners then turns 90* into the intake valve. Also being placed well away from the combustion chamber the air doesn't need a spacer to prevent heat transfer to the throttle body. Finally being fuel injected the spacer won't help fuel atomization or create a cooler fuel induction. On a carb the spacer prevented heat from entering the carburetor, spins the air as it combines with fuel and creates a longer run for the air fuel to mix. It just doesn't seem to do any if these things on fuel injection. It kind of seems like they just threw it in there because people were used to buying them for carbs. Anyway just my breakdown of the product claims I've seen. I can't see how they would work.

 

Have you considered maybe one of the cheaper transdapt spacers just to test the theory? I think they go for about 60 for our trucks

 

I have an even cheaper test option..........TB gaskets and a dishwasher safe plastic cutting board. Most of the good plastic cutting boards are between a 1/4 and 1/2" thick. I've seen the spacers made with a single 1/4" and a double 1/4" thickness with a tb gasket between the two layers. I've actually got the cutting board that I could fabricate this with. I really want to pick up a junk TB at the salvage yard for my template. The only deal is that it's just a spacer unless you want to get complicated and carve out the spirals. I think you could make some decent cuts with a dremel and achieve a "testable" design. Gaskets might run a few bucks each and a 12" x 12" high temp dishwasher safe cutting board might run $10. If I had a drill press, I would have given this a shot already. It's an idea that I've seen done and one that I've seen work, but it was on a carbed engine.

 

That works too I think transdapt has what they call a torque swirl series for around the same price not real sure

 

Throttle body spacers are a ****ig WASTE!

Ill prove this when I take the truck to the dyno in spring.. 3 runs with spacer, 3 without. Be no difference.