a question about ECU fooling for timming retard...

[Nubira2.2]

is it posible to fool the ECU via the IAT sensor

that the car is getting hot air so that it retards timming ???

this way i can get spark retard for boost

i know when u use the choco chip it senses cold air and adds fuel and timming

so it is posible to reverse this ?

gosh if we only knew whats in our ECU's

[PrecisionBoost]

I think that this is possible... but the amount of degrees of retard would not be enough to help.

Unfortunatly I feel the only real way to control timing to make maximum "safe" power is to tune the car with an aftermarket programable ignition system.

I do want to manufacture a device to do just what your talking about..... but as usual.... lots of ideas.... zero spare time.

I'm contemplating the idea of hiring an electronics tech this spring when they graduate.... that way I will have someone to take my ideas/drawings/schematics and complete the projects.

[Nubira2.2]

yes i know standalone's are way better

but if you r in a budget and u really wanna get boosted

there should be a way to unfortunally not extract the maximun of your car but @ least run closer to the safe side

that way is manipulating this sensors so that they read and do what we want ...

isnt there a ROM editor for our ECU
or a way to know what is written in the ECU?

there are so many questions and no answers

[PrecisionBoost]

Yes.... there are EPROM readers and Editors that will work with the Nubira (and most others) but that tool is several thousand dollars.

Perhaps it would be possible to start some kind of ECU exchange..... you get sent a reprogrammed one and then you send your factory one back as a "core"

Of course who ever is doing the programming would have to charge a "core" fee to make sure that people return their stock ECU's

I think there are atleast two people on the forum capable of reprograming maps.

I have a prom reader but that really only works on the older vehciles (such as the ECU for the C20GET ) all the new vehicles use flash proms which need to be reprogrammed in the vehicle.

Basicly..... someone would have to have a wiring harness with a diagnostic port.... and possibly a few other things.... not sure if the programmer would require sensor data or not.

My idea is very simple..... and it works like the other aftermarket systems.

I program a PIC microcontroller to intercept the ignition trigger signal and either retard or advance it based upon maps you have created via a laptop RS-232 connection.

Basicly.... it would allow you to read the stored map data and then modify it based upon RPM.

It wouldn't be expensive or hard to make.... but like I said.... lots of ideas.... no time to turn them into reality.

I'm an Electronics Engineering Technologist (also went through 3yrs of Petroleum Engineering) and I own a large oilfield manufacturing company..... we even have a small electronics area with two people working full time.

I have the capability of designing all kinds of stuff.... but like I said.... no time.... my manufacturing business keeps me busy 60 hours a week.... and the rest of the time I try and spend time with my familly ( 5yr old daughter , wife and soon to be new baby )

[ubuyau]

is it posible to fool the ECU via the IAT sensor

that the car is getting hot air so that it retards timming ???

this way i can get spark retard for boost

Sounds feasible - but i'd imagine it'd start cutting fuel since hot air is less dense.

Doesn't your piggyback do fuel and ignition timing control though?

Maybe you can fatten up the fuel curve if it only does fuel and starts to run lean.

--Tim

[Nubira2.2]

Yes.... there are EPROM readers and Editors that will work with the Nubira (and most others) but that tool is several thousand dollars.

Perhaps it would be possible to start some kind of ECU exchange..... you get sent a reprogrammed one and then you send your factory one back as a "core"

Of course who ever is doing the programming would have to charge a "core" fee to make sure that people return their stock ECU's

I think there are atleast two people on the forum capable of reprograming maps.

I have a prom reader but that really only works on the older vehciles (such as the ECU for the C20GET ) all the new vehicles use flash proms which need to be reprogrammed in the vehicle.

Basicly..... someone would have to have a wiring harness with a diagnostic port.... and possibly a few other things.... not sure if the programmer would require sensor data or not.

My idea is very simple..... and it works like the other aftermarket systems.

I program a PIC microcontroller to intercept the ignition trigger signal and either retard or advance it based upon maps you have created via a laptop RS-232 connection.

Basicly.... it would allow you to read the stored map data and then modify it based upon RPM.

It wouldn't be expensive or hard to make.... but like I said.... lots of ideas.... no time to turn them into reality.

I'm an Electronics Engineering Technologist (also went through 3yrs of Petroleum Engineering) and I own a large oilfield manufacturing company..... we even have a small electronics area with two people working full time.

I have the capability of designing all kinds of stuff.... but like I said.... no time.... my manufacturing business keeps me busy 60 hours a week.... and the rest of the time I try and spend time with my familly ( 5yr old daughter , wife and soon to be new baby )

is there any free one ??
if you have a Honda ECU u can chip it and use ROM editors such as CROM, Uberdata etc... which are free

we just need a smart guy to study our ECU and find were are the Maps Stored

[Nubira2.2]

Sounds feasible - but i'd imagine it'd start cutting fuel since hot air is less dense.

Doesn't your piggyback do fuel and ignition timing control though?

Maybe you can fatten up the fuel curve if it only does fuel and starts to run lean.

--Tim

sandly no i can only control fuel

and yes it will cut fuel but that depends on the MAP and that signal is the one u control with the
piggyback, also if your using bigger injectors u can compensate with them

the thing of having a steady IAT signal is atleast to know that your timming and fuel wont change due to IAT sensor

also if i where going to use a steady IAT signal i will use one that wouldnt put the car or ECU in a unreal or out of the MAPs range

[PrecisionBoost]

I'm pretty sure it wouldn't be a problem to read the ECU data.... it's just that you need an expensive scanner to get the binary file... and to reprogram it once your done.

If I remember correctly Tom (Gsiturbo/360dynamics) posted something about a programer that was reasonably priced.... do some searches with him as the author.... you might find it.

CHris