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Old 01-22-2016, 04:31 AM
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greaseguy greaseguy is offline
Senior Vegistroker
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Default Tih

Tube in hose. 3/8 aluminum fuel line running in 3/4 coolant hose az Dave sells tih fittings set ups
1999 early F250 EC, SB, ZF-6 Lariat V3 DFA
425,000 miles and counting
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Old 01-23-2016, 08:24 PM
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skyskijason skyskijason is offline
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Originally Posted by biostroker View Post
I just had an idea to put a tee on either side of the filter for a bypass. That way if the Racor is frozen solid the veggie oil will keep flowing. Sure, only 50% of the oil will go through the Racor, but better than none! Thoughts?

Still wondering what TIH is?
You most likely won't need it and I wouldn't run without a pre-pump filter. I have been routing the coolant hoses close to the base of the Racor to help warm it up a little. See the pics I posted earlier.

The Tube In Hose (TIH) is a heated fuel line. This adds more heat to the fuel from the tank to the pre-filter. If you look at the first pic I posted above, you'll see aluminum tubing running into a brass tee. That tubing continues past the tee inside 3/4" heater hose and comes out at another tee at the fuel tank.

I do a 'looped return' on my DIY conversions and both the supply and return fuel lines are TIH. The looped return sends all of the fuel the engine doesn't use back to near the fuel tank where it is tee'd into the suction line (to the pre-filter and pump). This 'loop' adds copious amounts of heat the the VO and contributes to melting anything in the pre-filter.
2001 F350 XLT 4x4, dually flatbed. 6637 air filter, single-shot injectors, straight-piped, BTS tunes, 200 gal main VO tank - 180k greasy miles
2000 Excursion Limited 4x4. V3, AIS intake, BTS trans & tunes - 120k VO miles authorized installer

RIP X & Toyhauler - you served us well.
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Old 01-25-2017, 05:50 AM
randy h randy h is offline
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Biostroker, I believe TIH means tube in hose. Referring to the wvo flowing through a tube that is within the coolant hose. It's the same as HIH, hose in hose
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