Propane Mixer Question - Read me MACE or LT

[zuluzeugma]

I figure I have the best chance of getting this answered here. Sorry its not real HC, but most guys running pane are HC.

About a year ago my buddy bought an old fleet vehicle with a tbi chevy 4.3 that ran on pane in its previous life. He had no use for the kit so he sold me everything save the tank and high pressure lines (they were missing when he got it) for $50. I got an electronically controlled block off valve, Model E evap, and a FB225M-2 Mixer. Every other propane set-up I've seen has used a CA225M-2. I'm guessing the FB (feed back) was a different model so it could be used with TBI (I got a computer with all the crap too). Currently there is no linkage or anything on the mixer and I'm wondering if I can convert this mixer to run without a computer or do I need to buy a different one?

Mace?
LT?


Thanks in advance

 

[Mace]

You should have the ADP (adaptive digital processor) that will allow the mixer to run in a closed loop. That will make the pane carb more efficient.

BTW, that is just a standard 225 carb with a coupel of extra ports. I do believe it can be converted over to a standard 225.

 

[LT]

What Mace said. I would try it, having the computer control the amount of propane flow would be more beneficial to you for fuel consumption. I have thought about installing the closed loop system that Mace showed me a year or two back. Just haven't gotten around to doing it as of yet.

Since it is based around the TBI set up... I wonder if the TBI adapter plates for the 2f would work with your set up.

 

[zuluzeugma]

Since it is based around the TBI set up... I wonder if the TBI adapter plates for the 2f would work with your set up.

Good thought. I'll check but I think the pane came through the top of the air filter and not at the base of the TBI unit.

What sensor does the computer use? just 02? I'm gana have to track down a wiring diagram for it I guess. Either way, for $50 I really can't complain.

 

[Mace]

The TBI adapter plate won't work. the mixer would still require the TBI butterfly valves. so it either has to be in the intake of the TBI or replace the whole TBI unit which it did not sound like it did..

O2 sensor is all that is needed. Wiring is dead easy. The only complication that I can imagine is if there was some sort of control in the unit for spark..

 

[LT]

I thought all the adapter did was mate the TBI throttle body to the 2f intake which still uses the TBI butterfly valves.

Slight hi-jack... Mace what is the name of the company again for the closed loop propane injection? I am looking to do some modifications to my 2f and that is on the list among some other little things...

 

[Mace]

Autometers parent company. Autotronics Dual Curve. Downloads - Instructions Looks like you might be out of luck tho..

Propane Equipment
Try them to see if they have any of the units left.

 

[zuluzeugma]

I feel like I remember taking undone a wire that went to his dist. (tach signal?) But it might have been the hot wire to the HEI unit.

My real confusion is: Even if I do get it wired up, there is still no place to attach a throttle cable. Its not totally drive by wire is it?

 

[Mace]

no, you need some sort of butterfly valve for it.

it is on a Vac demand system. the more air it needs, the more pane it feeds.. The previous setup used the TBI plates as the throttle body..

 

[zuluzeugma]

Got it, that makes sense...

 

[zuluzeugma]

Okay, the computer:

Autotronic Control Corp. - "Computer Support 1" - Part # 8690

Looked for a wiring diagram - no luck

Ideas?

 

[Mace]

Ask and you shall
Information Bridge: DOE Scientific and Technical Information - Sponsored by OSTI

 

[zuluzeugma]

Yeah, I found that article last night, but could not find a wiring diagram anywhere inside after skimming most of it....

 

[Mace]

near the end. P64 or so

The scan quality is pretty poor, but
Blue wire to knock sensor
three way plug to green map sensor plug
female three way to the other side of map sensor plug
Green, "fuel processor"
Yellow, +12Vdc switches unit to gasoline mode
Pink, +12V keyed
Grey, EGR computer signal
Violet O2 computer sensor connector
Brown (weatherpack plug), O2 sensor
Brown TPS

Looks like it is truly designed to run a TBI system.

Donno if it can be utilized as a stand alone unit or not.

Obvious answer, put TBI on your junk as well

 

[zuluzeugma]

Obvious answer, put TBI on your junk as well

It's a trailer queen, so I'm not going the dual fuel route.

No big deal... I guess I'll throw it on EBAY and see if I can make some money back on the deal... If I can find a forklift tank at the scrapyard, I might get the whole thing set up for $150.

Thanks for the help guys... I'll update this thread when I start putting it all together.

 

[mookie]

i thought the whole point of going 'pane was to get rid of all the sensors/wiring/ computer etc. and make things SImple?

 

[yotawheeler]

in my mind the whole point of 'pane is to get that rig running at any angle....the only reason i would think about it.

 

[zuluzeugma]

in my mind the whole point of 'pane is to get that rig running at any angle....the only reason i would think about it.

Correct.

My Weber 38/38 has no wires, but when I attempt some steep hill climbs or am side-hilling, my carb starves out.

Maybe he was comparing EFI to pane; EFI will get the same result as pane just with a whole bunch of wires...

In the end I'm not going to run the closed-loop system anyway...

Currently I'm making an adaptor plate to use the progressive butterflys from an old 1F carb.

 

[mookie]

but he already has tbi fuel injection which works just as well or better...

 

[zuluzeugma]

but he already has tbi fuel injection which works just as well or better...

WHO? ME? nope, I run a 1F with webber, header, and HEI. Its a hot little motor but it starves on hillls.