Any experience with this A/F gauge set

[mark '87 930]

http://cgi.ebay.ca/AIR-FUEL-BOOST-GAUGE-PORSCHE-911-924-928-944-968-TURBO_W0QQitemZ4642868432QQcategoryZ6755QQssPageNa meZWDVWQQrdZ1QQcmdZViewItem

I'm more looking at buying them so I can use the A/F gauge as a tool to see where I am at. The boost gauge will be a reference..

Anyone had any luck with this vendor/gear. I've seen them on ebay for some time now. Thoughts?

I really don't want to buy anymore for my car... but I just can't help myself!

[cnavarro]

I would recommend purchasing an LM-1 if your purpose is to use it as a tool. Those gauges look like Autometer knock offs BTW. :-)

[kuehl]

I don't believe those AFR's you are looking at are "wide band", for the price and display type they appear to be "narrow" band.


There are a over a dozen wide band AFR displays out there, we have been testing this one which is pretty easy to set up. It has an output feature and software to record to a laptop, AFR and RPM's. About the footprint of a credit card and 5/8" thick.
http://www.wmsracing.com/o2/index.htm

Pro's:
A) easy set up,
B) very long wire harness (remember most meters come
with short cables
C) AFR/RPM output for logging
D) free software
E) quick tech support

Cons:
A) rectangular box makes it difficult to find a location to mount, however I thought I saw a round meter on their site
B) though very accurate and responsive, when you are say idling in closed loop the 2 decimal display can be annoying, single decimal would have been good enough

Other AFR wide bands and info:
http://www.zeitronix.com/
http://techedge.com.au/vehicle/wbo2/
http://www.sdsefi.com/techegt.htm
http://www.innovatemotorsports.com/products/lm1.php
http://www.ontronic-efi.com/wideband.php
http://www.daytona-sensors.com/WEGO2.html
http://www.alamomotorsports.com/FJO/wbafr.htm

With regard to the "boost" gauge you noted, unless you are pushing over 10psi of boost the scaling is too great,
look for something that has a scale which will cover your boost range plus 50%, or simply find a good used 930 boost gauge.

[mark '87 930]

My boost gauge in the car is functional, I am just concerned with it's accuracy. I wanted to put in a 1.0 bar spring, but it's seeming already pushing that according to the gauge. I think that .8 - 1.0 bar is equivalent to 11.6-14.5 PSI roughly.

The AFR gauges you pointed out are a good tool, but more than I wanted to pay.

[kuehl]

Yes, your conversion to psi is close enough (assuming sea level).

I guess you could rig up a "simple" AFR for $14.95 using this
http://www.autospeed.com/cgi-bin/browse.cgi?product=888800044

Originally posted by mark '87 930
My boost gauge in the car is functional, I am just concerned with it's accuracy. I wanted to put in a 1.0 bar spring, but it's seeming already pushing that according to the gauge. I think that .8 - 1.0 bar is equivalent to 11.6-14.5 PSI roughly.

The AFR gauges you pointed out are a good tool, but more than I wanted to pay.

[mark '87 930]

That's more the ticket. Thanks kuehl.

I will try that out. I will speak to them and hope that I can retain my O2 sensor to connect to this.

[kuehl]

just be aware of the limitation of accuracy, most AFR tuners
use wideband 02's for a reason, otherwise .... have some fun