I'm pretty new electronics, I am currently taking a begining auto electronics course to learn more. I understand the ecu needs feedback from stuff like the tps, ignition, wideband o2, etc etc.

I am currently useing a s4 t2 tps on my megasquirt v3. I looked through my pile or spare parts and saw this other TPS, possibley a s5 t2 tps?


Whatever tps it is, they made their own bracket. Is that a s5 t2 tps?

 

thats not a s5 tps. a s5 tps looks like the s4 only theres 2 of them. i cant remember the name of that one but its aftermarket and was never marketed on the rx7

 

Its just off a random vehicle?
Is tuning the vehicle using a tps with a wider range that much better? I know there were the tps and MAP based tunes. is it worth it for me to go find a s5 tps?

Im staring at this ugly bracket they made out of galvinized metal. The vice marks are real nice. Starting to look like swiss cheese with all those holes in it. SHarp edges are cool too

 

i dont think its off a random vehicle. its aftermarket and i saw someone talking about them but i cant find it now iv tried searching for it. but i think its good its a full range tps if its what im thinking of

 

thats off a 5.0 mustang with a custom bracket

 

OH cool. Help my newbish *** out a lil. So if I figured out which wire was which, could I use this for my megasquirt? Would it be better than my s4 t2 tps? I sitll need a tune for my car, its actually on the side getting a few upgrades. So I need a tune anyways

Not that I am going to use this guys bracket/tps combo. Just curious

 

I was going to stick with all Mazda sensors on my race car but the price freaked me out. If I recall correctly close to $200.00 for the TPS. I just went to the local car parts store and looked at there catalogs and pick out what was the cheapest. It seams to all work fine. GM air and water sensors, and the TPS fits, I do not know. All I have is a part number and one spare in my parts box if it screws up.

Best Regards
Kim

 

That's the TPS commonly used in many standalone installations. Notably Haltech on the RX-7s. I think it's Ford or GM. Some jackass has cut the wires though so who knows if it works.

You can use any TPS you want, or no TPS at all.

Also don't count on a course in automotive electronics to be much help.

 

Yeah, if you're tuning speed-density, the only thing the TPS is used for is accel enrichments, and I've never had trouble even with the narrow-range on my S4 tuning that.

Ken

 

The only problem you'd have with the narrow-range is running closed loop, since driving on the highway takes you up close to the limit of the narrow-range TPS. I forget but I think it was around 60-70% throttle opening, and even mild hills would take it to 100%.

Solution is to just tune it very well and don't use closed-loop.

 

Or use manifold pressure to determine your open loop point.

 

DOH! Oh well, I got to start somewhere. Do you have any links to good info for newbs?

 

Only helpful if you can have a three dimensional grid for that.

I like running lean at low RPM even at atmospheric. Makes the engine a little "soggy" but awesome for fuel economy. You can get to atmospheric long before you get to full throttle at low RPM.

The OEMs only use oxygen sensors to trim for everything going out of whack due to entropy. Given that we can tune the things ourselves, there's no reason for us to need them other than laziness...