some msd/o2 sensor experience needed

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Several things affect what you'll need to run it at but the biggest thing I've noticed is if you have a big lumpy cam you'll have to run it pretty rich to get it to idle decent. I have a fairly mild cam in mine and run the idle as lean as I can to try and get some fuel mileage out of it. Around 13.8~14 to 1 in drive is where I run it. At WOT it runs best right about 12.5 to 1
I noticed the instructions said it will read lean at idle with a lot of overlap ? I have around 260 @.50 overlap and around 535 lift. Right now as i read through the instructions for tomorrow , i noticed I can't hook the power up to anything basically that runs anything else ? One long wire (another one !) Through the firewall to the battery in the back ?
Thank you all again.....
 
I noticed the instructions said it will read lean at idle with a lot of overlap ? I have around 260 @.50 overlap and around 535 lift. Right now as i read through the instructions for tomorrow , i noticed I can't hook the power up to anything basically that runs anything else ? One long wire (another one !) Through the firewall to the battery in the back ?
Thank you all again.....

Hum... I'd think it'd read rich at idle with a lot of overlap cause you usually have to run it rich with a lot of overlap, but I don't know that unit so I can't say positively. I have mine wired to a main B+ block I installed to power all the peripherals and don't have any problems, but it's not the same unit as you have either. I imagine their worried about noise generated by something else affecting it. Generally a good capacitor like the kind you use with high power stereo's will kill the noise
 
Hum... I'd think it'd read rich at idle with a lot of overlap cause you usually have to run it rich with a lot of overlap, but I don't know that unit so I can't say positively. I have mine wired to a main B+ block I installed to power all the peripherals and don't have any problems, but it's not the same unit as you have either. I imagine their worried about noise generated by something else affecting it. Generally a good capacitor like the kind you use with high power stereo's will kill the noise
I'm really looking at a way to use it more for test & tune than a permanent mount ? Use little motorcycle battery
(No interference) and put sparkplug in bung when not in use. I could weld bung in girlfriends Barracuda and tune it also?
 
I'm really looking at a way to use it more for test & tune than a permanent mount ? Use little motorcycle battery
(No interference) and put sparkplug in bung when not in use. I could weld bung in girlfriends Barracuda and tune it also?

That should work fine, and I do remember something about having a good dedicated power supply to it.

One of the things I really like about having the guage is the ability to tune better in the mid throttle range.
Sure, it's fairly easy to tune an idle or a WOT but the middle range is a little harder to get right.
The guage lets you see what is happening with the A/F mixture through the entire range of running.
 
well hooking it up was very straightforward. they wanted me to weld the bung in between 3 & 9 on the high side of course due to condensation reasons. I think I got about 830 or so just ran out of room up high. Anyways it spends its time in a warm garage, and out on nice days. I was seeing a lot of 11.7 - 11.8 .
 
You may already know this but 11.7 to 11.8 is pretty rich if it's straight gasoline (no ethanol). You'll probably make more power if you lean it out some. Plus it won't load up the plugs so bad
 
You may already know this but 11.7 to 11.8 is pretty rich if it's straight gasoline (no ethanol). You'll probably make more power if you lean it out some. Plus it won't load up the plugs so bad
"More power!" ? Yikes ! On the test drive i came around a corner to a long open straight in second and at three grade pushed the loud pedal down about halfway - well it went sideways for a half block as my gal was screaming -YYEEEEE HHAAAAAAA!!!! Until I get a little more use to this stroker motor I'll probably only notice more power on my time slip at the track. I'm sure you're correct . I think my first step is to identify the metering rods & jets to know how to proceed ?
 
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