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6.5L Diesel Engine Discuss the 6.5 GM diesel engine & associated components. Automatic transmission questions & problems belong in the 4L80/85 - 4L60E - 6L90 Transmission Forum


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Old 12-02-2019, 09:18 AM   #1 (permalink)
DIRT FIGHTER
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Please help me choose a system

I want to get rid of these gd fuel lines under the intake and the factory fuel manager. Im in south florida so I dont need a heater. My choices are the airdog pump/ filter setup or this racor
https://ptwiringsolutions.com/produc...jkpuGqvDVTWY0I
Which would you choose or do you have a better option.
Thanks!

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2002 3500hd 6.5 heavy chevy
Leroy pmd harness ext (bumper)
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Old 12-02-2019, 10:18 AM   #2 (permalink)
OkDually
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Quote:
Originally Posted by DIRT FIGHTER View Post
I want to get rid of these gd fuel lines under the intake and the factory fuel manager. Im in south florida so I dont need a heater. My choices are the airdog pump/ filter setup or this racor
https://ptwiringsolutions.com/produc...jkpuGqvDVTWY0I
Which would you choose or do you have a better option.
Thanks!
The Airdog is fine for the 6.5L but it is overkill for the wallet as far as the pump goes.
The IP only needs 5psi constant to be happy.

I would run the Racor filtration and keep the OEM Lift pump.
If at a later time you wanted to upgrade the lift pump I would recommend a Kennedy Single lift pump.

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Old 12-02-2019, 12:15 PM   #3 (permalink)
DIRT FIGHTER
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Great thanks! My work truck so not looking to mod more than necessary.
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Leroy FTB mod
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Old 12-02-2019, 12:33 PM   #4 (permalink)
Tommygunner
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As said. Filtration is good. But pump is not needed for a stock or mildly modded truck.
If you want a little more pressure. Replace the stock LP with one for a 93 6.5. They put out more pressure than later models.
Instead of an expensive pump you might want to consider a better exhaust system. Stock system is pretty restrictive.
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Last edited by Tommygunner; 12-02-2019 at 12:34 PM.
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Old 12-02-2019, 02:58 PM   #5 (permalink)
DIRT FIGHTER
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Yea I’ve been wanting to put an exhaust for a while. I’m pretty sure my cross over pipe is crunched inside. They don’t make a kit for a c3500hd. I’need to find someone that can modify the down pipe of a diamond eye system.
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Old 12-03-2019, 09:00 AM   #6 (permalink)
scasanova
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A 93 lift pump and some spin on filters are all you need. I use a 2 micron filter and a 12 micron fuel water separator.

https://www.dieselplace.com/forum/63...tantial-2.html
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1993 Chevy C3500, 6.5L, 4L80E, 4.10, Dually, F in the vin, WVO conversion with separate fuel filters and pumps, 2 micron filter after pump, 12 micron fuel water filter before pump, filter sock delete, front end rebuild, trans temp, oil temp, fuel temp, fuel pressure, dual isolated battery banks, the daily driver
1996 Chevy C3500, 6.5L, 4L80E, 4.10, Dually, F in the VIN, home made TM, vac pump delete, complete front end rebuild down to the coil springs, bearings and steering rack, HO water pump, Leroy oil lines, PMD relocate to frame, 12 micron fuel water filter before pump, filter sock delete
1997 Chevy C3500HD, 6.5L, NV4500, 4.63, Dually, 10 lug hubs, F in the vin, former bucket truck undergoing a crane conversion, extensive electrical upgrades, 6BT conversion on the horizon
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Old 12-03-2019, 12:29 PM   #7 (permalink)
JMJNet
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Unless your 2002 is really special custom made truck, I think the DE system will fit.

Now, the application guide may not go up to 2002 since there are very limited production of 6.5L diesel. IIRC, the 1st gen D-max came out at that same time frame. So, all the application guide knows only of the D-max and forget to include a 2002 6.5L.
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Old 12-03-2019, 12:56 PM   #8 (permalink)
DIRT FIGHTER
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The c3500hd is a cab and chassis only model. It’s got a massive frame , The down pipe needs to be lengthened I believe about 4”
I’ve got a pic of it in my profile. You can notice the difference in the front grill area.
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Leroy pmd harness ext (bumper)
Leroy tranny cooler lines
Leroy FTB mod
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Old 12-03-2019, 02:41 PM   #9 (permalink)
scasanova
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That is one expensive filter kit. I paid about 20 to 25 for each of the filter heads I used. I made my own lines with brass barbs and 30R9 fuel hose. With the 93 lift pump, I never see below 5 psi at WOT under load.
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1976 Chevy Corvette, 350 engine, 4 speed manual, posi, 6.5 conversion on the horizon
1991 GMC C3500, 350 TBI, 4L80E, 4.10, Dually, knapheide body, 6.5 KW Onan Generator
1993 Chevy C3500, 6.5L, 4L80E, 4.10, Dually, F in the vin, WVO conversion with separate fuel filters and pumps, 2 micron filter after pump, 12 micron fuel water filter before pump, filter sock delete, front end rebuild, trans temp, oil temp, fuel temp, fuel pressure, dual isolated battery banks, the daily driver
1996 Chevy C3500, 6.5L, 4L80E, 4.10, Dually, F in the VIN, home made TM, vac pump delete, complete front end rebuild down to the coil springs, bearings and steering rack, HO water pump, Leroy oil lines, PMD relocate to frame, 12 micron fuel water filter before pump, filter sock delete
1997 Chevy C3500HD, 6.5L, NV4500, 4.63, Dually, 10 lug hubs, F in the vin, former bucket truck undergoing a crane conversion, extensive electrical upgrades, 6BT conversion on the horizon
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Old 12-04-2019, 08:15 AM   #10 (permalink)
DIRT FIGHTER
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Would a leak in the ffm or line to the ip cause a loss in prime and make the truck hard to start after sitting over night? Also seems to stop leaking after a while of running. Do these symptoms help narrow the culprit?

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Leroy tranny cooler lines
Leroy FTB mod
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