I have seen so much debate on using injector heaters. They help heat but can cook the VO in the lines. Also companies installing kits show good proof that the IP is the best injector heater. View this video: YouTube - Episode 4: The Engine is the Final Heat Exchanger


I will be using a FPHE, so do I need a injector heater?

depends i guess

single/double tank being the most important for starting


personally im going single tank since it RARELY goes below 68F over here
so I would probably run injector heaters only

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I will be using a 2 tank system.

then technically its not a MUST since ur starting on diesel

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I run a digital thermometer/ thermocouple which I bought from Jaycar. It's a permanent fixture on no.1 injector line. It shows temps while driving, which is most/ more important.

My injector line heaters boost temps by 20C+.

I agree that the engine is the final heat exchanger so if it is less than the engine it will raise it to engine temp, so long as it's close!!
There's certainly no harm in offering the injectors, fuel at engine temp, which is what many users would advocate ....80C - 90C range.

I advise to invest in a thermometer like the above and monitor what REALLY is going on with fuel delivery temp during all driving conditions. Mine cost $25 -$30 and is also a digital multimeter.
Jaycar Electronics=

got pics/write-up?

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Some of my posts were lost with the recent biofuelsforum crash but I found this:

http://www.biofuelsforum.com/svo_use....html#post7997

I went for a 400km drive today in ambient 19C max temperature.
While idling in heavy traffic I saw the temp guage go up to 122C. That's the probe on no.1 injector line. I also noticed air bubbles in the fuel return line. Once I got going again, the temps quickly came down again to 80C and the bubbles stopped.
So I wonder if the fuel was boiling/vaporising in the lines. Remember, I have currently 15% petrol blend. The injector bleed-off lines feed back via the return lines and are banjo-ed to the top of the I.P.
So what I am considering is a switch on the injector heater circuits and an "idiot" light on the dash to report when the units are on. I still will have the entire circuit controlled by the key so that I don't have to rely on memory to shut it off. (Warning: I have heard of a vegecar attracting the attention of the fire brigade while he was away!! That was with a G.P. heater.)

I read about that last year. I think it was a VW Rabbit. The twit wired it such that it still heated with the ignition key removed.

Maybe see if the bubbles appear when you run it on 100% diesel.

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Cheers
Bruce
http://oztayls.blogspot.com/

1976 W123 300D (3 litre 5-cyl NA diesel running on SVO since June 2006)
1982 W126 280SE (Sadly is For Sale)
1993 W124 300D (3 litre 6-cyl NA diesel - being converted to SVO)

Hi Folks.

We market an injector line heater kit that is being used for both single tank and dual tank applications. The kit was originally developed for our Tarago which experienced air cooling across the injector lines bringing the fuel temperature back down after the injector pump. I had another customer experiencing the same issue with a Nissan van. We just couldn't get the fuel to burn properly because of air cooling - even after insulating all of the fuel lines, until we installed the injector line heaters which instantly solved the problem of soot at the exhaust.

The kit that we have put together is a series of flexible heating elements manufactured from nichrome resistance wire covered with a thin fibre reinforced silicone sleeve with high temperature connecters crimped to the ends. These elements are thermostatically controlled to be sure that we don't cook the fuel or crack the injector line. The thermostat switches on and off as required between 75c to 90c, so if the engine is running hot, the thermostat will switch the heaters off. There is also an "at temperature" indicator lamp at the dash that switches on at 70c. The elements are then covered with a high temperature lagging to make the system more efficient, and the kit comes complete with wiring looms relays and switches.

This system is incorporated to most of the conversion systems that we sell because it allows for cold starting under reasonable weather conditions (how many times have you forgotten to purge?), and ensures that the fuel is at the desired temperature at the critical point before the injectors so that the fuel will atomise properly offering a clean burn.

I don't recommend the injector line heaters as a stand alone unit (except for fat derived biodiesel users) as it is of great importance that the fuel also be heated before the injector pump to ensure that the fuel is lubricating the pump properly.

Regards
Marcus

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