3x mod ? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 18 (permalink) Old 04-23-2006, 06:29 AM Thread Starter
 
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3x mod ?

Thinking about running 3 hx lines? has anyone tryed it, any input or suggestons??
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post #2 of 18 (permalink) Old 04-23-2006, 10:06 AM
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Never thought of it or tried it...You think it would make a huge difference? I guess with all that pressure, more room is a good thing....something to think about...thanks for the idea. :Thumbup:

-Casey
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post #3 of 18 (permalink) Old 04-24-2006, 01:55 AM Thread Starter
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I was testing a 7.3 the other day with a gauge. the truck had a hx hose on it. at a idel i seen pressure spikes not bad but noticable. driving about the same, so i hook my gauge to another truck same year-modle and the pressure spikes were unreal!!: driving was even worse. i do think that more than one would help tame the oil induced spikes. now i just need to talk someone into letting me try it on a truck.:evil:
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post #4 of 18 (permalink) Old 04-25-2006, 03:18 AM
 
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I just did the HX mod recently. When I was looking around at some of the on-line vendors and reading up about what eveyone thinks I ran across some info that might pertain to your Q. I forget where I saw it, but the article was talking about some reasearch & testing that went into figuring out what size line to use. It said that using to big of a line would cause something bad and using to small of a line would be like doing nothing at all. So I think the idea of 3 lines is feasible if they are small enough. Maybe someone from ITP will chime in. I have their stainless steel line.
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post #5 of 18 (permalink) Old 04-25-2006, 04:18 AM Thread Starter
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I am going to put 3 hx lines on a coworkers truck this coming weekend.:Thumbup: i will test it befor and after the install, with a high pressure gauge. ill post the findings moday.
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post #6 of 18 (permalink) Old 04-25-2006, 06:28 PM
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Cool. For sure let us know what you find out.
post #7 of 18 (permalink) Old 04-26-2006, 02:00 AM
 
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Quote:
Originally Posted by diesel71
I am going to put 3 hx lines on a coworkers truck this coming weekend.:Thumbup: i will test it befor and after the install, with a high pressure gauge. ill post the findings moday.
I think the post about the different size Hx line was form Bob Riley. He has some info on his website http://www.dieselsite.com/index.asp?...PROD&ProdID=50


The idea of course is to balance out the psi between the two heads and the fuel delivery smooths out a bit which in mine it was sweet....:Thumbup:

While on the subject of Cross over lines here's my idea for the fuel. I've been soaking up all the info at Texas Town Car's website (requires registration due to previous hackers....) and from what I can tell a fuel cross over line (Fx mod) from the #1 (pass. side) to the #8 on the driver side would act as an accumalator and keep the injectors fully fueled during it cycle. After reading all the info I'm waiting on thier reply about installing one.

From his tables, this set up eliminated the cackle and fuel mileage went up on 5 of the 6 trucks by .5 to 1.5 mpg.
Since I don't have time for a full fab up hope they have a hose I can drop in.

It would take a 90* 1/8" NPT to 1/4" compression fitting under the turbo intake and the A/C compressor area.

What you guys think...?? anyone ever try this. Kinda like a poor man's approach but beat 3 bills and already have the FPR shimmed up to 68psi.

C-man
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post #8 of 18 (permalink) Old 04-26-2006, 04:51 AM Thread Starter
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I have done the fuel cross over line. :Thumbup: i ran a line from the right head, in the front to the left head in the rear. worked great, but a real pain geting to the fitting on the left side. i didnt do any tests befor or after. this truck didnt have a cackle isue. that truck has been down, blown engine :shrug: not mine a friends. he didnt say anything about more mpg, but the truck did run smother. wish he didnt blow it up, he let me try every crazy thing i thought of on that truck:evil: :evil: :evil:
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post #9 of 18 (permalink) Old 04-26-2006, 05:47 PM
 
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Thanks, that's what I was kinda looking for real world feedback. I have not been to our local NAPA dealer but is it possible for a shop to fab up a 100R4 hose w/ about 4" of 1/4" tubing on the ends so I can use the 90* 1/8 NPT to 1/4 comp. fittings?

If so then I'm gonnah hop on this one....!

C-man
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post #10 of 18 (permalink) Old 04-27-2006, 03:47 AM Thread Starter
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I beleave they can. when i did the fuel hx i used 1/8 to an#4 fittings, had a stanless steal brake line off my race car about 34 inches long, routing was tough but it worked. have you removed the fuel module in the tank????:
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