Is there a way to delete the AFM with an Rtek chip of sorts (2.0/1), or is there a plan to make it have the ability to? I've got a 1.7 right now, and would be sold on a 2.1 if they had it in the works...

 

Ditto on the AFM delete request, would be a slam dunk to do the 2.1

( I am sitting on my S4 Turbo II conversion project, just need to send in my ECU or go aftermarket, I would rather do RTEK)

 

This has been "in the works" for some time now, hopefully no news is good news....

 

idk, i rep rtek pretty hard, and digital tuning to my friends asking wat management im using.
not to get any kind of feedback on the forum that gets a large amount of hits is kind of
frustrating..

the maf delete would help spool time SOOO much. just not sure what the issue is.
if we knew we'd prob stop asking... but theres many other car brands that run with just the map.
and several other tuning companies the delete the maf, again, not sure what the hold up is.
but itd be nice to know SOMETHING...

 

I'm sorry I cannot provide the MAF delete. At this point you should not count on it.

Please see https://www.rx7club.com/showpost.php...5&postcount=18

 

Sad, but true post.

One small thing I'd like to note - there is a chance that if you were able to figure out how to delete the MAF, you could open the doors for a new market of people. The low price, PNP, and current abilities could attract more owners to go your route over other options.

 

sorry to hear that the business isnt as busy as u would like.

would u be opposed to the customers helping with the afm delete and other issues?
im sure there are people that would be willing to help this.
i myself wouldnt mind trying myself if i knew where to start,
and if i couldnt figure it out, i have a plethora of friends that could very well help me figure it out.

i love the rtek, the price and functionality is unbeatable, i just want to see it go further.

 

+ 1
One if the main reasons I went w/the rtek was the simplicity of using the stock map and being able to ease into tuning. My skills have not yet progressed to the point where the maf is a significant restriction, however I'll get there. It would be great if the product were able to mature w/the diy tuners it has helped to create; many of which I'm sure would be willing to help in whatever way they could.

 

i did hear at one time they were suppose to come out with another update that would eliminate the AFM. havent heard of anything since.

it would be very very nice to get rid of it tho. in my engine bay its starting to become a problem with the stock fan and getting everything to fit rite.

 

I am not sure but I don't think the sensors in the Rx7 are sophisticated enough to run without a AFM. Since that is not what they were supposed to do in the first place. Maybe having it run a hot wire would be a better choice. Although not sure if all hotwire MAFs run the same resistance.

I havn't been in the game for a long time so I can not remember if a Mass Airflow Sensor (MAF) is considered Hot Wire.

 

the FC AFM is not a hotwire, otherwise we would have been able to use MAS like the 240sx ****.

 

I would like for this to happen as well.

On a side note my friend said something to another company about possibly jumping into the rx7 game. Their current line is somewhat the same start as rtek, you send in your ecu for modification then they send it back with their mods. Here is part of the e-mail from them,

"Stepping up to an entirely different platform is a huge task. If someone is already offering chips for that platform, then you're probably better off asking them to offer new options. Maybe even mention that you're also talking to us about entering the market if you need to put pressure on them to make the changes...

That said, can you get me information on these ECUs? Which model years were actually EPROM ECUs? Are they flashable? I definitely like the RX7 platform...I've just never gotten into the ECUs much"

 

Have'nt heard anything back yet. For those of you that possibly have one as another vehicle or friend's that have one, this company caters to DSM's (Eclipse, Talon an Evo's). The name of the company ECMTuning. I have a couple of friends that have it an from what I've seen I really like the set up an software.

 

A hotwire MAF would be a great upgrade to get around the pisspoor performance of the stock AFM. The only problem is the only unit I've been able to find is over $500 which would put the total cost of the combination in excess of what once can find a PFC or haltech for.

While those ecu's run on a MAP sensor (which in many cases is inferior to a MAF) they also offer higher resolution and computer based software making tuning easier. If I could have an rtek w/ a hotwire maf for 600-700 I'd be all about it. Or if the resolution were improved and a officially supported computer-based tuning program were offered 800-1k wouldn't be unreasonable.

3" or 3.5" kit
http://www.splitsec.com/pricelist.html

 

Nah, Bra!
You can get a hotwire MAF all the day long for 50-100 on any car in the junkyard. Once you find one that is a good size and easy to manipulate, get a new one of those for 150-250. or cheaper.(i would just take a known good one i have laying around the shop.)

 

im checking out the wiring diagrams out now.
gonna see if i can at least wire something better in.

ill post what i find

 

ok, ANYONE correct me if im wrong.

looking at the maf wiring harness (with pins holes looking at u) Going left to right 1-7

(fc3s maf)
[1] = g/o colored wire - switch positive
[2] = g/l colored wire - signal TO ecu
[3] = b ...................... - Ground
[4] = br/w ................. - signal FROM ecu
[5] = b ...................... - Ground
[6] = b ...................... - Ground
[7] = br ..................... - Thermo signal

i found a wiring diagram of a DTC hot wire obdII

http://www.fixautopartz.com/2010/11/...uit-high-input

[1] = thermo sensor
[2] = maf signal
[3] = maf return

soooooo
pin 1 on oddII would connect to wire(pin) 7 on the fc3s harness (THERMO)
pin 2 on obdII would connect to wire(pin) 2 on the fc3s harness (TO ECU)
pin 3 on obdII would connect to wire(pin) 4 on the fc3s harness (FROM ECU)


all others dont look like they would matter since fc3s pin 1 is just for the switch, and pins 3 5 and 6 are just grounds.

although i may be wrong about pin 1, im not too sure if thats the fuel pump switch..
if it is could one just make a physical fuel pump on/off switch?

if this is too foggy or if anyone has any better ideas please chime in!!!

 

You have to understand the differences between a MAS and an AFM. MAS measures *mass* of air, an AFM only measures airflow. The MAS is corrected for density, the AFM is not. Unless you tell the ECU of this change, I don't think you'll get consistent results.

You just cant connect the sensor and expect it to work (or someone would have done it long ago). What signal does the AFM put out? What does the MAS put out? Some MAS put out voltages, some put out frequencies. Which one do you have? Without fully understanding how both work and the signals they produce, I highly recommend not connecting anything.

 

turbo2ltr is right, it has been tried before only to have ill results. There has been write up research on people who have tried to swap in Z32 MAF and S5 Cone Type MAF/AFM.

Wiring a MAF in place of the AFM isn't the issue. Its how the ECU sees and computes the signal. You would need to have a signal converter wired up that would translate MAF to AFM. Otherwise you would need to reprogram the ECU itself to accept MAF/MAP. The stock FC ECU is very limited in how adjustable it is, even with the Rtek daughter board id assume.

 

Well without people like this trying to get this done it won't ever happen! Also no offense turbo2ltr, but you didn't think the Rtek would work with a laptop either. If enough people get into this we can make it happen!

 

so the issue is just afm and maf difference, hmmm
not that im saying ur wrong, but would u be able to find the thread, or do u just know from experience?

i do know that i had issue with a N/A maf not working on the turbo ecu,
which didnt make sense seeing how it only read vacuum flow.


then im curious to see if a larger maf would work..

gonna research it a bit more see what i can turn up.
if anyone else has any ideas, lets get them rolling!! i HATE this damn thing! lol



i do have a write up of changing from s4 style maf to the s5. its definitely better flowing, but still tiny as mouse *****..

 

I heard that, i havent even fired up my palm in months.

signal convertions will be the biggest obstical.

I think what i'm gonna do is, data log the output voltage of the afm and plot along side the ECU's interpertation of the signal. which will give us our scale

Ie. closed=4v, half=2v open=.5v. once we know the scale, we can look for mafs with the same scale, or using resistors or better yet all those junk FCD's laying around, and find a way to adapt it.

The biggest issue is you won't really be getting the benefits of a MAF only loosing the flapper door as a restriction in your intake.

i don't know if it is fesible to adjust the range of parameters of the AFM. whats the max reading you can get 900? what if we scaled it so that 1200 was the new 900, and 600 would be 450. then just edit the fuel maps up by the percentage for the change in FLOW.

Were the ECU is seeing 500 of flow, a 12.5 afr and theoretical power would be say 250hp
The car would really be seeing 625 flow and a 12.5( after correcting it) and would net 300.
Take this scale and apply is at the cap,
ecu see's 900, a 12.5 afr, and theorectical 380hp.
Car really is 1200 flow, still the same corrected 12.5 afr, and putting down 400+.

this would be with no re coding inside the rteks, just a signal manipulation and fuel map corrections.

kinda piggyback/ghetto. but so it the palm OS EMU.

 

hahaha. I somehow find that hard to believe since I did 90% of the development of the rtek software on the emulator!

 

As far as it being possible, it's been done on other cars so it isn't impossible:

http://forums.bimmerforums.com/forum....php?t=1228729

http://www.splitsec.com/products/psc1/PSC1005.htm

I'm sure if people want if bad enough it could be solved.

 

..ppl thought the world was flat..



after seeing that post, im 100% sure we have ZERO dev support..


going home this weekend, gonna try some things out

Gonna go Ferdinand Magellan on this ****!