FM O2 signal modifier

[acidbug]

A stock ECU can pull over 30% of its fuel if it thinks the engine is running rich - such as a boosted car. The actual amount depends on the model of car. At best, this means poor driveability until the computer goes into open loop mode. At worst, it can have catastrophic and expensive results. The signal modifier prevents the ECU from seeing a rich condition under boost. Simple installation and no effects when the car is not generating boost.

From http://www.flyinmiata.com/store/prodinfo.asp?number=07-46300&variation=&aitem=6&mitem=6

My Question is "What can this do for me?"

I am running N20...and am thinking about upping it to a 75 shot this summer...and was wondering would this item be of all use to me...or is this item Really only for Turbo Vehicles..

I figue that the idea between Turbo and N20 is very similar for the fact that they both introduce more air to be combusted by the engine...

Thanks in Advance..

Charles

 

[1sty]

For turbo only! basicly when the vehical crosses from vac to boost the voltage clamp tricks the ECU into thinking its getting a 14:1 air fuel ratio but its really getting a 12:1. So unless NOS creates boost then the clamp will remain inactive.

 

[acidbug]

Thanks for the Help!!

Chas

 

[Tonpow]

"For turbo only" is because it uses a boost switch to activate and because it is the most useful application for this specific device. Understand its function, and if you have some other creative use you could use it for any car.

The problem is the ECU's authority during closed loop operation. You keep adding fuel, the car keeps taking it out, ad more, ECU takes more out, etc...Then it goes closed loop and you are way rich.

Its a voltage clamp with a boost activated switch. Boost comes on, the switch is tripped, O2 sensor voltage is not 'aloud' to go past a pre determined(by the device) point. The ECU doesn't 'see' that your running below 14.7, now you can tune around a turbo happy 12:1.

For your application, your probably not ever using nitrous when the ECU is closed loop. Your wide open and more than likely open loop. Therefor you have no need to fool the ECU.

Is my logic flawed?

 

[spoolinmp3]

Is my logic flawed?

no

 

[big_ben]

If you still want to use it, I'm sure you can call FM and ask for a schematic of it and just take out the boost switch and solder in a manual switch so that you can turn it on by command when you are using N2O.

Just an idea.

 

[Aricjm15]

why not hook it up so a Nos line goes to the switch, like how you have a pressure gauge, just get a hose T and hook the other end to the voltage clamp, so when you open your bottel, it sees pressure and activates the clamp

just my 2 cents

 

[chdesign]

y not ditch N2O and get a turbo like a real MAN!!!!! lol just kidding.