86 freightliner - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 15 (permalink) Old 02-10-2012, 01:46 PM Thread Starter
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86 freightliner

Hey guys
Just thought i would show off my truck in here. She's nothing too special but she's paid off and makes me a living. Mainly came to the forum to get some info from the experts. Its coming time for an overhaul for the old 400 big cam and i wanna get some more power outta the old girl. Not sure which cpl it is I'll have to check it out tonight






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post #2 of 15 (permalink) Old 02-11-2012, 03:07 PM Thread Starter
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Its a cpl642

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post #3 of 15 (permalink) Old 02-11-2012, 03:29 PM
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Add a dual fuel line to the front head for 25 hp a fass gives another 25. Make sure you change your vibration damper when you do an overhaul. Could add a crank balancer too.

'95 T800 N14 13sp DO 4.33 gears
'89 W900B 444 Cummins CPL 1280 18sp 3.55 w/2sp axles 19ft CIM grain/silage box
'03 Dodge 2500 4x4 6sp modded just right
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post #4 of 15 (permalink) Old 02-12-2012, 02:00 AM
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Great looking older truck,paid for,makes money.........WHAT'S NOT TO LOVE!?!?!

-Doug
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post #5 of 15 (permalink) Old 02-12-2012, 01:18 PM Thread Starter
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yeah shes a good old truck
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post #6 of 15 (permalink) Old 02-12-2012, 07:21 PM
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Loooking good, it's nice to see older trucks still on the job.

Getting a little more power out of her is relatively simple, you can do the dual fuel lines, but I would save the $700 dollars on the FASS and buy a decent set of injectors, that will net you more than 25hp for less money. Let me know if you want to go that route.

I had good luck and was pleased with the results when I did injectors, and that was with a pump with stock settings, I feel it is safer to leave the pump set at stock and get more fuel into the cylinder instead.

Cody.

79 KW W900A 3406B, Garrett GT55 turbo, RTO12513,
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79 KW K100C 400BC1, Holset HT4B hybrid, custom
injectors, RTO12513, 4.33 eaton DS380s

00 Freightliner Classic XL C15
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post #7 of 15 (permalink) Old 02-12-2012, 10:36 PM
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Is that because you don't think the FASS works? I was always under the impression those units(and others like them)were originally designed to work on PT pump motors.

-Doug
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post #8 of 15 (permalink) Old 02-12-2012, 11:11 PM
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Is that because you don't think the FASS works? I was always under the impression those units(and others like them)were originally designed to work on PT pump motors.
The way I look at it is that if you are starving a PT gear pump for fuel you have other problems, the way the gear pump is setup it will only pump and pull what it needs, there is no reason to force feed it.

An engine that relies on a supply pump likes say a B/C cat responses well to a well pressurized flow and actually need it. I see a point and time that it may be needed, but no one outside the electronic cat crowd will ever trash the HP level that it would require a feed pump to maintain power.

Cody.

79 KW W900A 3406B, Garrett GT55 turbo, RTO12513,
4.11 SQHP rockwells

79 KW K100C 400BC1, Holset HT4B hybrid, custom
injectors, RTO12513, 4.33 eaton DS380s

00 Freightliner Classic XL C15
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post #9 of 15 (permalink) Old 02-12-2012, 11:22 PM
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I see,i always thought they were supposed to take air out of fuel. I guess i'm thinking of the fuel preporator. Do they even make them anymore?

-Doug
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post #10 of 15 (permalink) Old 02-12-2012, 11:47 PM
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Yeah, they are even more expesnsive. The gear pump in a way does the same thing as either pump. I seriously doubt anyone has proven the claim of 25hp on the dyno, and it they did it was done along with a pump tweak as well, because all the fuel to the injectors is still limited by the pt system.

Cody.

79 KW W900A 3406B, Garrett GT55 turbo, RTO12513,
4.11 SQHP rockwells

79 KW K100C 400BC1, Holset HT4B hybrid, custom
injectors, RTO12513, 4.33 eaton DS380s

00 Freightliner Classic XL C15
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