I want an accurate way to measure my a/f ratio while on the street. Steve Kan has the ultimate setup (a wideband sensor w/the box mounted over his steering wheel) but that's a little pricey for me . I'm thinking of going w/a Greddy peak/hold/warning EGT gauge...anyone have any experiences they'd like to share?

Thanks--

 

I don't have one personally but plan on getting one soon. Although my good friend has a GReddy Electronic EGT on his Supra, and it seems to work very good. They don't bounce around like a A/F does, and the peak hold function is VERY nice to have.

 

it depends on where you tap the sensor. if you tap the sensor to the down pipe, the reaction and temp reading will be slow. if you tap the sensor to the manafold, the temp reading and reaction is faster.

 

Anyone have pics of putting their sensor in the manifold? If this is where you can get a more accurate reading, it sort of makes sense to put it there...

 

EGT will be quite accurate if you put it in the right spot like other people have already said. I put mine in the spot right before the turbo where the two pipes meet (i am single turbo). If your still twin I'm not exactly sure where to put it as I don't have a manifold around to look at. If you have the turbo's off then I'm sure it'll be obvious to you.....just be sure and don't put it after the turbo's like some people do. I've seen people with them in the downpipe....by the time it reads lean your most likely already toast.

 

I have Greddy 60mm Temp, Oil pressure, and A/F gauges w/ peak-hold, and I love it.
The A/F meter is more accurate than, say, an Autometer gauge it comes with it's own O2 sensor. The gauge moves about as much as a tachometer.

The one thing that took some getting use to is that the warning light flashes all the time when *not* under boost (normal driving). Anytime you let off the gas, or even cruise (unless using cruise control), the gauge senses that small deviation and sends the needle in the red which causes the warning light to come on and blink. Only under boost do you definitely do not want the warning light to come on.

The best scenario is to get both an A/F and EGT gauge because they compliment each other. I would get the Greddy A/F first because it is very responsive and tells you exactly what you want to know: lean or rich. Then, get the EGT because it can confirm what the A/F is indicating.