Hey so I read before about modifying the iat to be more of an open junction (wantboost)

I had a set of xactos like wantboost described so thought I'd see what I could do.

is this enough or do I need to keep going into the black plastic and actually fully reveal the junction? Im thinking yes since wantboost said it wss difficult as f*ck and so far this wasnt bad, thoigh expecting to f*ck up from thei advice might have helped. But if you fully reveal it, dangling by thread wires, get sucked into engine? Or you leave ejough plastic to hold everything together?

What about the extra grey plastic on the base? Thinking it is extra thermal mass but also isn't covering the junction.



might have to add iat scaling as an option to hts...
then we can use gm.

 

I'm OCD..couldn't stop..

assuming this must be close to what you're supposed to do:


tried taking some material off the base but it's just a PITA.

 

99.9999% of the temp sensors take readings from the tip.


As long as that circled area is exposed, you should be good.
Most people just run the IAT in the intake, before the throttle body, instead of doing this particular mod, or an S2k sensor (if I'm not mistaken). These sensors are touted to be a bit less responsive because of the plastic in which they're encased, so they get shaved (like you did here), or swapped. I could only imagine shaving one and then relocating pre-TB. Could be interesting. lol

 

This is a great idea. Then you could simply use the S2K sensor (or the GM sensor as you suggested) with proper scaling instead of modifying a Civic/Integra plastic insulated tipped IAT that reacts slowly in OE form.

 

I'll keep it in mind.

Will involve finding the table in the ROM (there's a public version on pgmfi) if it's already been found and commented then just need to add the ability to modify to HTS.

​​​Still getting up to speed with the code. I can't promise anything though..while I am beginning to contribute I am not in charge by any means so have no idea if/when anything could land but if there is interest I will see what I can do

 

seems like additional ecu code might be needed. It's a resistive sensor. Might have to change a resistor in the ecu based on which sensor ypure using. But could also add code to modify. Issue is not much free space for stuff.

 

This is one of the issues regarding chip based tuning... limited memory space on chip when compared to the more expansive memory space found on board a Moates Demon or Hondata s300 sub-board. More memory space allows for MORE advanced/custom features.

 

This is actually completely incorrect and baseless and perhaps shows how much misinformation can get spread or how little understanding there is on how these systems work - and I hate to say but if you don't fully understand it, maybe you shouldn't state things as fact when they're not true.

Again - I don't know how many times I need to say this - the ECU has no idea whether it has an EPROM, EEPROM or an emulator installed - all it sees is memory. It reads it's instructions and data from this memory.

While it's true that emulators can have more onboard memory, and you can swap between these banks, the ECU itself is still limited to 32k for it's program. It simply can't address more memory than that; if you were to tell the MCU to look up an address past 32k it would just crash - the MCU doesn't even have the appropriate output pin to toggle the needed address line on either an EEPROM or an emulator to go past 32k.

When I say we're limited on space, I literally mean that we don't have any space left for instructions in that 32k.

Feel free to look at the source code yourself if you don't believe me:
pgmfi.org ? View topic - IDE and commented rom used for Honda Tuning Suite

While Hondata's version of the ROM will be different due to their own features - it again, cannot exceed the 32k that the ECU has available.

Uploading the compiled version of the linked binary to a Demon versus a chip makes no difference to the available "space", again the ECU MCU has no ability to address any memory outside of that area.

Yes, add on boards can add some extra features, such as extra logging and IO. Outputs were never really done properly on demon as "no one used them anyway" but even anything the add on board does has to modify what the ECU sees within that 32k of address space. You either need to sacrifice instructions or data to get more room for other things.

Again, please don't spread misinformation. pgmfi is a great resource in learning how these ECUs work.

 

And to be clear, while I advocate chips as a good solution for those on a budget / who won't ever touch their own tune, that does not mean I only offer/use chips as it seems like that's what is implied here.

HTS works with many emulators on the market, minus S300 because Hondata would sue. It also burns chips.

The ONLY function you lose by using a chip is extra analog inputs (datalogging only) and real time modification.