Bob, AFAIK to resistance in either of the senders is linear, but as I see it that's not the main problem. The problem is the different voltages being applied to the gauge regulators in the 1600 pod and the 200B pod. You see the tank sender units go in the opposite direction to the read out on the gauge, i.e. 0 ohms @ 5v on the 1600 sender reads Full on the 1600 gauge, and 15 ohms on the 200B sender @ 5v reads a little over 1/2 on the 1600 gauge. I sent off an email to a friend in the US that i've spoken to in the past about this problem. What he did is to disconnect the fuel gauge in the 1600 pod from the stock voltage regulator and bought a new regulator from Tandy, wired it all up and it works.
This is what he wrote: Hi, To replace the stock 510 regulator use Radio shack cat. No. 276-1770A This is a + 5vdc Voltage Regulator 1 Amp. If you need a + 3vdc reg then look up the cat No. and they also stock a variable +-5vdc unit that's a lot more expensive. Disconnect the original, and remove the heat style regulator, (the insulator board thing) drill a small hole in the metal cover to attach the radio shack unit. Solder a wire to the "in" side of unit to the " IGN" 12V plug. Solder in a wire to the "out" terminal of the unit to the "panel" plug. The center terminal is to chassis ground. I didn't need to hook up the ground because it was getting ground from somewhere else. Try not to use to much heat to unit during soldering or you could damage new unit. Plug it back in - works great and costs less than $2.00. Hope this works for you:>) The panel plugs he's talking about are the Fuel sender (Pin 7) and the Temp sender (Pin 4) I'm sure the stock reg replacement if we can get it will cost a few $ more than $2 here. I think with a little bit of electronics skill you could make something up yourself that's adjustable for very little cost. regards Terry -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Bob - Uni Sent: Tuesday, 5 February 2002 2:27 PM To: [EMAIL PROTECTED] Subject: Re[2]: 200B fuel tank in 1600 fuel gauge calibration? Hello Terry, Is the resistance linear in both the senders? ie, at half tank the resistance is halfway through the range? If so, then I should be able to tell you how to "recalibrate" the 200B sender to provide the same resistance scale as the 1600 sender using 2 resisters, total cost would be about 20c from any electronics store, and you could use the fuel tanks present sender. Tuesday, February 05, 2002, 1:12:55 AM, you wrote: TR> Richard, TR> I've done this on a 1600 a long time ago and I've been talking directly to TR> Chris but as I cant find the tech info on how I did this last time due to a TR> HDD blow up some time back and I lost a lot of stuff. I'll paste where we're TR> up to but I could do with some help from the list. TR> The 180B sender idea just might work with a 1600 gauge without all the TR> frigging around getting a 200B sender to work accurately. Do you know what TR> voltage a 180B dash pod runs at and also what is the resistance range of a TR> 180B sender. It just may be the same as the 1600 and that leads me to think TR> that this route just may be a better solution than trying to figure out how TR> to get around the complexity of the 1600 gauge/200B sender problem. TR> Pasted for info >> I'll have to give this some more thought - first impressions of the >> problem at hand is that a 200B gauge and sender wont work in a 1600 - >> the 1600 pod voltage is 5v and the sender is 0-100 ohms. A 200B pod >> voltage is only 3v and the sender resistance is something like 15-85 >> ohms so you see the problem. I'm not sure about the temp gauge sender >> on the 200B either so you could fix the fuel sender and frig the temp >> sender, there were at least 2 (VDO & Niles). >> >> I think using the 200B sender with a resister, probably adjustable is >> the go with the stock 1600 gauge. >> >> I'll be back >> >> TR TR> regards TR> Terry TR> -----Original Message----- TR> From: [EMAIL PROTECTED] TR> [mailto:[EMAIL PROTECTED]]On Behalf Of Richard Clough TR> Sent: Monday, 4 February 2002 10:23 PM TR> To: [EMAIL PROTECTED] TR> Subject: Re: 200B fuel tank in 1600 fuel gauge calibration? TR> Chris, TR> I cant answer your gauge problem but have you tried it? 180B tank sender TR> units work fine with a 1600 gauge. If your not keen to connect it in the TR> tank, remove the sender unit from the tank and connect to the wiring loom TR> and earth. Operate the float arm and see if the gauge registers correctly TR> over the travel of the sender unit arm. Do it slowly as the gauge is TR> designed to move slowly to avoid wild fluctuations. TR> Can you give us description of how you fitted the bigger 200B tank and fuel TR> filler, a few listers have been thinking of trying this for the larger TR> range. TR> ----- Original Message ----- TR> From: "Chris Williams" <[EMAIL PROTECTED]> TR> To: <[EMAIL PROTECTED]> TR> Sent: Friday, 25 January 2002 9:54 AM TR> Subject: 200B fuel tank in 1600 fuel gauge calibration? >> Hi All, >> I have recently put a 200B fuel tank in my 1600 and was woundering how TR> to >> calibrate the fuel guage as I was told it would read on about half way TR> when >> it is full. >> >> Regards >> >> Chris W >> >> >> -- Best regards, Bob mailto:[EMAIL PROTECTED] --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
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