The Injector Line Heaters!
Friday, March 21, 2008
I first cut 6 5" pieces of the Teflon Tubing and then one-by-one crimped on a butt connector, clipped the 316 SS wire to length, and installed the closing connector.
Then I held the heaters up to the lines to figure out the length of each lead and chained all the heaters together in series and wrapped silicon tape around the exposed metal connectors.
I wrapped some Teflon tape around the injector lines and then, using silicon tape to hold it down, wrapped the heaters on the lines.
Then I put on two layers of silicon tape and the shiny/fiberglass insulating tape.
On top of all that I zip-tied on some pipe insulating foam. IT WORKS! draws around 8 amps, about 100 watts of heating power.
Labels: Diesel Scout, Injector Line Heater, WVO conversion
Edits
Saturday, March 15, 2008
http://biodiesel.infopop.cc/eve/forums/a/tpc/f/159605551/m/3541021232, thanks Reggie, I'm going with your idea here. I'm going to go use SS wire instead of the cupron, I put on the cupron and found that it is so thin that it is hard to work with and easily burns itself out.
Here are the McMaster items for the new line heaters:
89045K34
Type 316 Stainless Steel Wire .032" Diameter, 1/4-lb Coil, 91 ft/Coil
5335K13
HI-Temp Chemical-Resistant PTFE Sleeving .034" ID, for 20 Awg Wire
7971K41
High-Temperature Crimp-on Butt Splice Noninsulated, 22-18 Awg, 900 Degree F Temp Rating, Packs of 100
7304K133
392 Degree F Chemical Resistant Wire 18 Awg, .068" OD, 600 VAC, Red
When these parts come in I'll rewrap the inj lines with teflon 3 mil tape, wrap the ss teflon coated wire around the inj lines, install the high temp wiring componenets, cover the heaters with silicone tape and a final layer of thermal exhaust manifold tape I bought from AutoZone.
So frustrating, I would be done under the hood and finishing up the rest this weekend if the cupron had worked like the guy who sold me it said it would. It took hours and hours of now unbillable time... How much longer now till it's all done? Not much... If I had known how long this part would take I would have just ordered the heater line from FattyWagons like I have before.
Another Edit... by request of the owner and for aesthetic reasons the filler to the veg tank is going to be placed on the same side, and just ahead of the diesel tank filler.
Edit to a Side Note: A Mercedes diesel expert came to look at the conversion and said that the design of the sd 33 is only loosely based on the diesels MB put into the W123 chassis.
Tank Paint Edit: Instead of the Industrial enamel paint that I mentioned for the tank, I ordered special tank liner and exterior sealer paint from Summit.
I've done a conversion in 3 days, starting with nothing, drinking redbull and rush ordering parts. You go into stores, see what they have, and make it work. Decisions are based on what's available more than anything else. It works, but with a rare and cool vehicle like this, I can't just put in the parts that get the job done or it will stick out like a sore thumb...
Labels: Diesel Scout, Injector Line Heater, Tank, WVO conversion
Injector Line Heater
Monday, March 10, 2008
Here we have silicone tape sandwiching some welding wire. 8ft of this wire gave me about 1.2 Ohms of resistance which comes out to around 10 amps of heating power. It actually worked pretty well, and the tape didn't melt or misbehave, but when it came time to install the heater on the injection lines it was too stiff. So next I used 30ga heavy thermaleze / cotton cover insulated cupron which wrapped around the injector lines very nicely over a layer of silicone. I will pick up some high heat wire connectors and wrap silicone around the top. This wire is 2.94 Ohms per ft so the wiring will be done in parallel connecting 6, 2 amp, individual heaters creating a 12amp heating system. Thank you Mun and Tyler for helping me pass electromagnetism.
Labels: Diesel Scout, Injector Line Heater, WVO conversion
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