How hot is too hot?

For discussing the modifications needed for diesel vehicles to run with 2 tank veggie oil conversions.

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How hot is too hot?

Postby mankypro » Tue Jan 20, 2009 7:27 pm

I'm concerned my oil is getting too hot after the addition of a 36 plate FPHE - I'm looking at temps between 180-200 F - I'm assuming this is not good for my rotary stanadyne injection pump? What is the best temp for IP longevity?

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Postby David » Wed Jan 21, 2009 2:29 am

Do you not like the answers you have already received to this exact same question you posted on infopop 2 days ago?
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Until then, it's just more endless gloom and doom Veg folk law.
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Postby coachgeo » Wed Jan 21, 2009 10:18 am

nothing wrong with fishing. each new catch in each different river might offer more clues. May not change the answer but each might provide more details.

Besides.... that was infopop and glad infopop folk got to learn something new..... but this is here. Readers here might want to learn something new too. Sometimes we forget that there is a group here collectivly learning.
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Postby SunWizard » Wed Jan 21, 2009 10:45 am

200F shouldn't be too hot for your IP. Hotter VO is thinner which is better for your known to be weak IP. Thats near the same temp that many have been running that IP at.

Hot temps are bad mainly for the newer IPs that have electronics mounted on them, and thats why there are relocate kits for those.
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Postby mankypro » Thu Jan 22, 2009 12:02 am

Thank you for the helpful reply. Hadn't checked for responses on Infopop David, heading over there now to read them, thank you for being my instant notification! Good on ya mate!
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Postby jburke » Sat Jan 24, 2009 7:18 am

I have the same engine and a 21 plate FPHE. After seeing temps of 200-205%F at the ip, I installed a ball valve in series with the coolant side of the FPHE to limit the coolant flow and keep temps <180*F. It's barely cracked open, maybe 1/16 of a turn. Not ideal, as it limits startup heat flow.

Look at the viscosity vs. temperature chart. There is no point going above 150*F. I've put almost 100,000 miles on my Elsbett at <=150*F.
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Postby mankypro » Sat Jan 24, 2009 8:42 pm

Today I had a chance to drive at highway speed with everything operational. It was in the 40's ambient temp and it froze overnight. I keep a cubie full of oil outside to see what my tank look like, as I'm new to this. Well I might as well have been shoving bars of butter into tank it was so solid :)

Anyway, my engine coolant at highway speeds was about 180F and #2 flowing through the fphe was at about 150F before I switched to oil, switching turns on my Vegtherm Mega as well. Looks like under load at 65mph I can keep my oil at about 160F - at lights it gets up in the 180 degree zone, if it goes higher I have a dash toggle to kill the Vegtherm, which should drop 10-20 degrees.

I'm awaiting for a -18F day to see how things go - I may actually need to go HoH in those temps, but they've been rare this year. We'll see. Everything is working very well.

p.s. I used an IR thermometer on the IP - it seemed to be about 10-15F cooler than coolant temp. This was on #2 with no supp. heat and on oil as well with the fphe and vegtherm on.
Last edited by mankypro on Mon Feb 02, 2009 8:28 am, edited 1 time in total.
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Postby jburke » Sun Feb 01, 2009 9:30 pm

"p.s. I used an IR thermometer on the IP - it seemed to be about 10-15F cooler than coolant temp. This was on #2 with no supp. heat and on oil as well with the fphe and vegtherm on."

Makes you wonder what the fphe and vt are for right? -)
iirc Dana Linscott measured 150-160*F stock at the ip in the same engine.
Given enough time, and the fact that the ip sits between the heads, it does get up close to engine temperature.

Keeping a sample of fuel outside so you know what's in your tank is a good idea.
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