Preferably in 2 1/16.

 

There are many accurate A/F ratio gauges. The electronic series from Greddy, Blitz, and Apexi are very decent gauges. I have heard that the basic Autometer one is pretty good as well. Anyways, why do you need an A/F ratio gauge? If you want the BEST readings and the most accurate tuning methods, look into an EGT gauge......

 

I was just looking for alternatives to having to drill and weld a bung into my Y pipe. But I would assume most accurate gauges come with their own probe unit so I would have to drill and weld anyway.

 

A/F's are mostly for flash. I don't find it helps me at all with me car. EGT and fp gauge the way to go.

 

The only accurate A/F gauges are the one's that come with it's own broadband O2 sensor. Those ones with flashing LED's are a waste...

 

Yep, looks like EGT is the way to go.

 

The problem with truly accurate wideband O2's is their relatively short lifespan, and they are quite expensive to replace. If your really into racing with nitrous though, it would be best to have an EGT, Fuel Pressure, AND A/F ratio gauge. The leaner you can run, the more power you will make, and you can only do that safely with all 3 gauges... but don't blame me if you blow your motor trying...

 

a guy at courtesy was trying to tell me to go get a real a/f monitor,costs 500ish, can't remember the name. He said it is so much better since you can have cold detonation, which a egt won't tell u. Anyone know what he's sayin?

 

Someone correct me if i'm wrong. The guy's theory is flawed for two reasons. 1. You can definately hear and feel detonation when you are useing forced induction. I'm not sure under N/A but i believe if there were to be detonation "knock" then the computer will correct timing for this. It is only at WOT the computer will need help to compensate for this. It will use a preprogramed fuel map because the sensors and CPU can't process and correct itself that qiuckly.
2. Cold detonation should not matter that is what your knock sensor will help your computer compensate for. I hope you don't start your car and floor to the first stop light before you let it warm up. And
I hope you don't plan to trailer the car to the track, push it to the staging lanes, only to start it right before you floor it down the track on a 100 shot of n2o. I don't think there is anybody that stupid.
Just don't floor your car right after you start it, DUH, and monitor your egt closely and you will be fine.

 

Actually your theory is flawed a bit. Usually, by the time you 'feel; or 'hear' detonation, damage is already being done. That's why a lot of people are now using the J&S safeguard system with boost, because it can detect inaudible detonation and reduce the timing under boost before any damage is done.

 

I guess there's a first time for everything. Although I don't fully agree, I'm just to tired to explain.

Can you explain a bit more how this system works. I'm not very convinced that it will do much good. I'm sure it works just don't know to what extent it will be able to 'save' your engine.