robot808

Hello all,
I am in the midst of a replacing my US TB with a Euro TB (I do realize that there is a debate as to whether this helps at all, I have one, so I 'm trying it). My question is whether I am potentially changing the amount of air in the system, does it make any sense at all to mount an AF gauge?
I realize that these are more a concern for boost, but I would really hate the idea of screwing up my car just to have fun with this simple mod.
Any thoughts? Get it for piece of mind or L-Jet has me covered?
One more thing, if I get one, easy enough to hook up to the single-wire 02?\
Thanks as always,

Mongo

There are narrowband gauges out there to hook up to your O2 sensor, but the gauge fluctuates between rich and lean continuously as the computer is adjusting the mixture continuously. This does tell you however that the O2 sensor is functioning and the computer is working as it should. Most people feel that the narrowband gauge is irrelevant.

The most accurate would be a wideband gauge. If your car is mostly stock however, a narrowband gauge is sufficient for some troubleshooting. The gauges are cheap however, and if you wish to upgrade later on to wideband, you can simply rip the gauge out, buy a wideband kit with a UEGO Bosch O2 sensor and weld a bung on a different section of the exhaust pipe to take your A/F measurements.

dprantl

Forget about the narrow band gauge. If you really want it, spend the ~$350 for a wideband controller/sensor/gauge combo.

Dan
'91 928GT S/C 475hp/460lb.ft

robot808

It's not so much that I really want one, I am a tad bit nervous about how the L-Jet will respond to more air (if I actually get some).
I know I can mix in more fuel, but what would be the easiest way to whether I needed to adjust the mixture?
Wouldn't narrow band help with that at all?

davek9

A good tuner shop could run a tailpipe test for you, else for the price of a few trips to their shop you can do it yourself for ~ $250 US.
I just installed the Innovate LC-1 w/gauge, depending on the type of gauge the price goes up. I did the digital and am more than pleased w/it.
It will/can also produce a Narrow band signal that will replace your stock OX sensor if you do not want to run two O2 sensors.

It is the only way to really know what is going on w/ your AFR, here is a linky for you.

it's fun to tune,

DaveK9

http://www.innovatemotorsports.com/x...cat=262&page=1

antsmands

Hello Bob;

I am planning on installing one of these in my car. http://www.sunpro.com/product_detail.php?pid=16293 Just looking at it today. It works with a single wire O2. I will help you know what's happening with the A/F ratio at idle but not much help while driving except will let yiou know that the L-Jet is adjusting the ratio. It will look cool too.