off idle adjustment on IDFS(china)

[ORANGECRUSHer]

Thanks sled
Im in agreement. I read somewhere you want to be at 6mm under your intake valve size.
I have never cared to much what the idle afr was, i was more or less using that to judge how far i was from LBI. John from aircooled used to say he would dial in LBI then turn out a half turn because LBI is not stable. I've found that to be somewhat true. I don't have half a turn before it starts choking on a rich mix. So i tend to like about 1/4 or less. Just for comparisons sake, i keep track of the afr at idle when i tune. Not because i want a certain afr but because i know it does better. I hope that makes sense. Seems like my engine likes it a little closer to 12. LBI usually gets me around 13 everytime. I can also watch the afr to see if i have a cylinder that is a little of from the others. The afr will bounce more. If I can get the bounce to cover only a 0.3 spread instead of the 0.9 spread i tend to get on the initial setting. I've actually gotten pretty good at focusing on the engine sounds and getting the right spot.
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Brian H.

OrangeCrushERBerrien Warrior-2.4L Quad4-2x3 arms-1.5Fox coilovers-094-930CVs
LAZY MARY1970 Baja 2110cc-82mm CB forged crank-AA pistons/cylinders-Grant rings-1.1 vw rockers-CB serpkit-CB chromoly PRs-CB maxiflow filter pump-wix51515 filter-Dual 44IDF-cut/turned front beam-AEM wideband-Auber CHT-Donaldson Dual PowerCore filters-custom AL air boxes

[Alstrup]

You didnt mention anything about 38 venturis from the beginning The classic "I have this problem, what could it be?" and then leave out vital information.
YES, reduce venturi size to 36. Mikes explanation about collapsing airspeed is probably 40% right. The rest is the fact that a wimpy ignition can´t ignite what ever comes in, because the mix is too poor.
The comment on the venturis needing to be 4-6 mm smaller than the intake valve is an old viwes tale. It is not correct. The venturi size should be what the engine needs to perform accordingly to the rest of the package. If you start working with the problem, like really dive in to it instead of just doing what the next guy tells you, you will be amazed as to how small venturis some engines can perform with and at the same time you wiull be surprised as to how large venturis other engines need to perform their best.
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https://www.thesamba.com/vw/forum/viewtopic.php?t=435993

[ORANGECRUSHer]

Why do you keep picking on my ignition?? Is a Ford EDIS system weaker than the single coil VW setup everyone else is using?
_________________
Brian H.

OrangeCrushERBerrien Warrior-2.4L Quad4-2x3 arms-1.5Fox coilovers-094-930CVs
LAZY MARY1970 Baja 2110cc-82mm CB forged crank-AA pistons/cylinders-Grant rings-1.1 vw rockers-CB serpkit-CB chromoly PRs-CB maxiflow filter pump-wix51515 filter-Dual 44IDF-cut/turned front beam-AEM wideband-Auber CHT-Donaldson Dual PowerCore filters-custom AL air boxes

[ORANGECRUSHer]

I typed a long rebuttal to your post but I'm not going to let you take me there again. I got little time for negative life sucking people. You obviously have a lot to share, but you can't be nice about it. You also haven't said anything we all weren't already thinking.
_________________
Brian H.

OrangeCrushERBerrien Warrior-2.4L Quad4-2x3 arms-1.5Fox coilovers-094-930CVs
LAZY MARY1970 Baja 2110cc-82mm CB forged crank-AA pistons/cylinders-Grant rings-1.1 vw rockers-CB serpkit-CB chromoly PRs-CB maxiflow filter pump-wix51515 filter-Dual 44IDF-cut/turned front beam-AEM wideband-Auber CHT-Donaldson Dual PowerCore filters-custom AL air boxes

[sled]

I'd probably track down some 34 vents as well and play with those. Yes, they're a little small in a 44 carb, but it might be an interesting experiment. How high do you want to rev this engine? no point in using a vent that will allow it to rev higher than you want. Stronger vacuum signal is beneficial in a few ways.

what's trans gearing and tires do you have?
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drive your split.

[Alstrup]

[Alstrup]

[ORANGECRUSHer]

[ORANGECRUSHer]

[Dale M.]

IDF's are not wide open carbs you are mistaking them for IDA'a.... IDF's are very diveable in all ranges....
_________________
“Fear The Government That Wants To Take Your Guns"
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ...

[ORANGECRUSHer]

[chrisflstf]

Here is my opinion. Idf float setting is 10 to 12mm, right? Chinese webers seem to be set at 14mm (mine were). So a 10mm setting means the fuel level is higher than a 12mm setting. Correct? If that is true, then modoks statement in regards to fuel level of the emulsion tube makes sense.

What modok wrote:

"Does changing the fuel level do anything for it?

If the fuel level is too high, covering the main ring of holes in the emulsion tube, it can cause a slight delay in the mains starting, followed by a rich spot.
OR, if the fuel level is too far below the holes, then the opposite."

One other item from my own experience is the drillings on chinese emulsion tubes are all over the place and sloppy as well

[ORANGECRUSHer]

I wish I could keep all this stuff straight like you guys. I'm just a dumb electrician. Probably too many amps thru the knoggin.
_________________
Brian H.

OrangeCrushERBerrien Warrior-2.4L Quad4-2x3 arms-1.5Fox coilovers-094-930CVs
LAZY MARY1970 Baja 2110cc-82mm CB forged crank-AA pistons/cylinders-Grant rings-1.1 vw rockers-CB serpkit-CB chromoly PRs-CB maxiflow filter pump-wix51515 filter-Dual 44IDF-cut/turned front beam-AEM wideband-Auber CHT-Donaldson Dual PowerCore filters-custom AL air boxes

[ORANGECRUSHer]

[ORANGECRUSHer]

I mentioned it before and I'm going to see if I can do it as an alternative to cracking open the carb since it's a big production to get inside my carbs now. but I'd like to see if I can unscrew a stack quick enough and pull it out to be able to see the gas line on it before it evaporated. Honestly, what better way could there be than actually seeing where the fuel level lands on the tube? Better than setting to some arbitrary distance and then hoping it's where you want it.
_________________
Brian H.

OrangeCrushERBerrien Warrior-2.4L Quad4-2x3 arms-1.5Fox coilovers-094-930CVs
LAZY MARY1970 Baja 2110cc-82mm CB forged crank-AA pistons/cylinders-Grant rings-1.1 vw rockers-CB serpkit-CB chromoly PRs-CB maxiflow filter pump-wix51515 filter-Dual 44IDF-cut/turned front beam-AEM wideband-Auber CHT-Donaldson Dual PowerCore filters-custom AL air boxes

[ORANGECRUSHer]

Maybe even putting a sharpie line down the side and reinstalling it and removing again to see where the line disappears...
_________________
Brian H.

OrangeCrushERBerrien Warrior-2.4L Quad4-2x3 arms-1.5Fox coilovers-094-930CVs
LAZY MARY1970 Baja 2110cc-82mm CB forged crank-AA pistons/cylinders-Grant rings-1.1 vw rockers-CB serpkit-CB chromoly PRs-CB maxiflow filter pump-wix51515 filter-Dual 44IDF-cut/turned front beam-AEM wideband-Auber CHT-Donaldson Dual PowerCore filters-custom AL air boxes

[ORANGECRUSHer]

Along this line of thought, I also noticed my fuel pressure gauge is reading lower than I like. It's around 2.6-2.75 psi. when I want it at 3. That is also hard to get at now lol. Something to play with this weekend. I'm sure fuel starvation isn't an issue when sitting still making a turn, but I get a lot of bouncing in my afr reading while I'm at a constant cruising speed on the smooth highway. Maybe the level isn't quite keeping up in that situation? Otherwise I have some inconsistency between my cylinders causing them to not burn equally at speeds greater than 60mph.
_________________
Brian H.

OrangeCrushERBerrien Warrior-2.4L Quad4-2x3 arms-1.5Fox coilovers-094-930CVs
LAZY MARY1970 Baja 2110cc-82mm CB forged crank-AA pistons/cylinders-Grant rings-1.1 vw rockers-CB serpkit-CB chromoly PRs-CB maxiflow filter pump-wix51515 filter-Dual 44IDF-cut/turned front beam-AEM wideband-Auber CHT-Donaldson Dual PowerCore filters-custom AL air boxes

[Dale M.]

Think it's time for you to get EFI Subie....
_________________
“Fear The Government That Wants To Take Your Guns"
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ...

[ORANGECRUSHer]

[SGKent]