Carb Tuning with Holley's Wideband O2 Meter 

Cruising at 12.5 is way to rich, it was better before he touched it, you should jet for cruise, power valve will open when you stab it and that should bring you to your 12.5. The best way imo to tune the carb is. 1. Setup ur idle mixers aim for smooth transition when you give it stabs, (example mine idles at 13-13.5) 2. Square the jets (block power valve) and do full throttle runs aim for 12 to 13 a/f. Or whatever gives you best mph at the track. 3. Install power valve (size power valve to driving style, not the BS about half of vacuum crap) and lower primary jets, aim for 14 to 15 a/f ( don't worry at cruise there is little load on the motor to do any damage). 4. Do full throttle runs and open up the power valve channel ristrictors until you get the same a/f as in the first step. 5. Size accelerator pump squirters for smallest size before it bogs. (In orther words don't put a 35 squirter to cover up a hole due to poor transition in the idle circuit). Your car should run clean and hard under full throttle. At least it works for me!!

I have never seen a second gen Camaro with a column shift, and I've owned two of them plus most of the gearheads I knew had a Camaro or Firebird. Good vid on tuning tips with the A/F gauge.

While the general comments about the gauge are spot on, this is pretty misleading for any inexperienced tuner. Shows part throttle driving and says AFR should be mid 12s...thats too rich and neglecting comments on power valves makes it oversimplified.

Great video thanks

I am installing a Holley street avenger carburetor into my 87 Z28 with a 305 in it. How much hp do you think that I will gain after ripping out the old 80s emission hardware?

Nice video. Question, why aren't you showing the jets on the back bowl? It's a double pumper HP carb isn't it? Under hard acceleration, the fuel tends to roll out of the front bowl and the jets require extensions, too. I was hoping you were going to go into a little more detail. Could you do a video with a little more tuning tips for N/A cars?

Do you have a part# for that kit?

The most this video showed me was that there's a tool for jets. As far as how to tune a carb this was a fail. No explanation on what the Guage is doing. This video was made for people who already know how to tune with an afr Guage. The comments are more helpful than the video.

What should it be while idling

good video

What's the part number?

thanks

you need to be on cruising speed at 14.5-15 and full throttle round 13..

if i am too lean at full throttle am i going to change the jets in the front block or the rear where the secondaries are?

Cool

It was cruising and 13.5 almost 1 bar which is actually fine,....a lol richer than leaner plus it's not a steady as you can see it varies not like a fuel injection which is steadier because of the manifold

I have a triumph spitfire with twin SU HS4 carbs,after i rebuild the engine and g/box most of the resto will be done,i'd like to fit EFi etc,but the carbs are nearly new and i want to tune using lamda as stoichiometric gauges don't know the fuel used,so the O2 in the exhaust should be the best measurement point for tunning,should the holley O2 meter work on any petrol/gas engine. I know the displacement is far from my 1500 or 1300 engines capacity,but isn't the fuel ratio going to be the same per unit value.

Are the main metering jet circuit actually utilized when cruising under 2500 RPM?

Haha I've been using spray paint caps for years too

Time for that 427 chevy small block

does the sensor need to be angle up when installing in the exhaust pipe

What's a part# for wideband kit??

I actually liked this video because of the helpful comments, not because of the info in the video....I think that guy has that carb tuned a little too rich for cruising...

I wish I could get mine working no matter what I do gauge is everywhere and I'm getting a 8.88 code

14.7 is what you should be shooting for at cruise and 11.3 at wide open.

JVC stereo

Damn, that's quite complicated!! I am lil new to this carb and efi world...i am a big fan of running traditionally with carbs...but after some videos on carbs seems like carbs can only be tackle by guys who have core knowledge and how abouts of their car mood!! Ummmm...i guess guy like me can't opt for carb but only EFI...fix it and forget it type.

so, where are the "tuning experts by hearing"?