TurboGuy

What would be your advise on the least expensive way to achieve the perfect a/f curve ?

dlr944

I think the majority of the list uses the ARM 1 and ARC 2 to try and achieve at least a near perfect A/R; inconjunction with dyno testing this should give you a solid fuel curve for your app. Of course chips are the other alternative. As far as least expensive..??? I am not sure but it will pay to have some flexibility in adjusting the A/F as you add go fast parts.

Luke

arm1+arc2 = $700 though.

TurboGuy

Thanks for the information. Who actually makes the ARC2 ? and is there another compatable product out there ?

SamGrant951

leave it stock

j/k

Luke

<img src="graemlins/roflmao.gif" border="0" alt="[hiha]" /> lmao

David Floyd

The Arm 1 can not tell you if the A/F ratio is perfect.

You need a wide band O2 sensor, at a dyno or buy one for your car ( about $750 ) if anyone knows of one for less let me know.

Hope this helps

<img src="graemlins/burnout.gif" border="0" alt="[burnout]" /> <img src="graemlins/burnout.gif" border="0" alt="[burnout]" />

RAPID944

TurboGuy here it is <a href="http://www.splitsec.com/" target="_blank">ARC web page</a> <img src="graemlins/bigok.gif" border="0" alt="[thumbsup]" />

aka 951

Although you may get the perfect (or close) air/fuel curve, you effectively mess up the timing, among other things. Because you are fooling the DME by telling it that you have either more or less air/flow than you actually have, the maps in the DME are accessed at the wrong locations. This may be fine for fuel, but the timing maps are what can get you. You can either lose timing or gain too much timing, whatever it will be incorrect and could lead to a quick or slow destruction of the motor, or just poor performance. Bottom line - it's a crutch anyway you slice it.

Luke

sounds like GTA/sds/Tec2/3 are the only solutions

Danno

You can also get custom chips programmed for your particular configuration. But as soon as you do another upgrade, you'll need another set of chips (and dyno time).

Konstantin

do you have a web site for GTA?

Konstantin

951Tom

David Floyd,
A certain model Honda Civic (lean burn motor, I think) uses a wide band O2 sensor stock. It's about $170.00.

Tom
'87 951
'86 Supra

aka 951

Tom,
The lean burn Honda oxygen sensor won't work with a standard a/f gauge. It is especially designed for Honda ECU.
Further, the sensor is calibrated only on the lean side of 14.7.
Thanks very much.

Danno

I think David's talking about a complete wideband O2-sensor and display unit. The voltage-output of a wideband O2-sensor is completely different from the normal one that's centered around 14.7:1.



You wouldn't be able to swap it in and expect any of your O2-sensor based computers or displays to work.