Any Carter AVS Gurus in here??

I'm trying to figure out which holes are the high speed air bleeds? Also I would not mind learning a few tricks....


Steve

Find someone that runs NSS in a Mopar. They’ll know their way around an AFB. There’s a few guys that frequent this board that Check that box. Doug (DVW) comes to mind.

Take yours apart and look very carefully at all of it, then take the time to figure out exactly what you want to know
Once you learn how to do that you will never need help again on figuring out the way the major systems in carbs. work
Good luck, you can do THIS

Dean Oliver in Stutgard,AR did the one on my Stocker Cuda. He is really good.

Here you go.
Doug

That is a very helpful tech sheet Doug, thanks for posting it.

OP, definitely take some time to work out the bugs in your AFB.

After much parts changing and test driving my 383-4 runs very strong for a bone stock low deck with a 500 cfm carb lol.

Thanks for the replies so far guys. The primaries I can figure out. The secondaries have a spray nozzles and no booster cluster, so it's a little more difficult to figure out.

All OE AVS's are lean from the discombobulated emission requirements of that era (68-71) when Ma & the rest of em were trying to keep up with the strict federally mandated emission stds. convert the tall pri jets/3 step rods to eddy performer short pri jets/2 step rods. a few thou richer on cruise/power might be a good start. AVS strip kits are as rare as can be. EDIT An AFB is a far better carb to work with (if you have a choice).

To the op, thanks for posting this thread. I like Rapid Robert's tip & it may be the solution to my bro's 517 Hemi's lean backfire problem. He's got 2 650 Eddy Thunders (AVS) & after a few yrs, its developed a carb backfire on WOT from crusing speed. Their accelerator pump linkage is already on the top hole & springs, jets & rods were replaced on install. SO maybe, if we can find a qualified tech in Vegas (no old school gurus here), maybe this is the fix. May send them off to Competition Carbs (Oliver), to have this done. Thanks again.

That is a beautiful Hemi!

Start a thread with the setup of the carbs/hemi and I'm thinking you can work it out. Especially if it is an issue that developed suddenly.

Triggerfish, the messed up calibrations were in the OE (68-71) AVS's only. the later AVS thunders would not have that issue. now you can get the OE AVS's to run like a scalded dog if you put some work into em but for the nth degree of performance there are much better carb choices. but on the early AVS's, He may already have em/they may be required for class rules/he might not want to buy new carbs.

Thanks Robert & not trying to hijack the op's thread, but maybe the carbs just have some dirt in some of the circuits. OR, maybe its the huge content of ethanol & other crap in the winter blend Vegas pump 91. Think we'll try 5 gal of race gas & see if it cures the issues.
As for the op's question, I spoke to Oliver (Competition Carbs) on the phone a few yrs back & he was super helpful.

We're here to help & be helped by as many people as possible. I look at it as the random acts of kindness movement that is catching on to some extent (& sorely needed). It makes me feel grateful that non ethanol has always been available here (& we're the #3 corn producing state in the country). I remember way back in the early 80's that people were complaining that their engines were dying at stoplights & I told em to use non ethanol & problem was solved. Post what it ends up being

Thanks, I do plan on swapping over the the AFB Jetting and rod configuration. I have the jet kit....

The exact hole for the high speed air bleed in the secondaries is definitely my major hurdle right now. I think I know which one. But need to be sure.

I would change the secondary jets first to get it in the ball park before messing with high speed bleeds, it is way easier to change the jets than to solder or weld up the bleed holes, isn't it
Use the air bleeds as the final last fine tuning aid
I have mess up more than one Carter AVS by adding size to holes in the secondary fuel delivery tubes and air bleed holes
One last thing is if you can't jet the carbs. up enough to make it better look at the needles and seats sizes

I wonder how much hp the needle and seat will support? I'll be under 500hp I'm sure....


I won't be playing with any air bleeds unless the fuel curve is out on the dyno.

It has two .110 seats now. I think I will be alright seat wise.... Q-jets only have one at .135.

Did those carbs always do that? Sounds like no. What changed?

Nothing except it sat for almost 3 weeks before being driven, so maybe its varnish or contaminants causing it. But it didn't backfire today when he drove it. He's got 2 elec fuel pump systems he can select. One's an Aermotive in tank system & the other a Holley Gerotor pump. 1/2" feed & return lines. No chokes on the carbs.

Spraying WD40 around the air bleeds can do wonders. Good idea to do once in a while.