performance upgrades for 6.9 - Diesel Forum - TheDieselStop.com
6.9L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

 
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post #1 of 10 (permalink) Old 06-26-2007, 11:42 PM Thread Starter
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performance upgrades for 6.9

what are the best upgrades avalible for this engine? I understand that there not powerhouse's but I want to get more grunt out of this old girl, but dont have the cash for a turbo, what else is going to give me the most amount of power? I do plan on daily driving the truck and mud bogging it to.
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post #2 of 10 (permalink) Old 06-27-2007, 01:16 AM
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Re: performance upgrades for 6.9

Re-gearing will give you better acceleration, but no one thing or group of things will give you an increase anywhere near a turbo. Most modifications will net very little without the turbo to get more AIR into the motor.

1997 Ford F350 SRW 7.3L PSD
1985 Ford Ranger 2.3L 5 speed
1966 Mustang 200 I6, auto, 4 wheel disk, power brake retrofit, Corvette master.

Former vehicles, 1994 E350 7.3L IDI, 1985 International 1654 rollback, 6.9L IDI, (2) 1994 Ford E350 7.3L IDI, 1985 Ford F350 DRW 6.9L IDI, 1985 Ford F350 wrecker 6.9L IDI.

*dual ASE Master Certified, Automotive, Medium & Heavy trucks*

Owner / operator, Patriot Automotive, N Ridgeville OH
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post #3 of 10 (permalink) Old 06-27-2007, 10:09 AM
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Re: performance upgrades for 6.9

If your ruling out a turbo, then headers, propane, water injection, and bigger exhaust and air intake is all you can do, which might net you 20HP.

- Mel

1983 F-250HD 4X4
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55MPH at 1400 RPM. 19MPG Avg.

1993 F-350 CC DRW
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1987 Bronco Diesel 6.9L C6 4X4 with 3.54 gears, 2" body lift.



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post #4 of 10 (permalink) Old 06-27-2007, 05:32 PM
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Re: performance upgrades for 6.9

just fyi, these trucks are heavy, i also mudrace mine. they will sink to the bottom QUICK! i wheel mine alot also, does great on the trails. i have been to tellico, and the badlands with it. next week we are headin to haspin acres. gona be fun.

for trails and rocks, the motor is perfect stock. bump the idle up to 900 rpm and idle over everything. pisses off the other guys in my club.

video from mud bog

tellico rocks

PLAY TRUCK
1986 F250 6.9,ATS turbo, np435, BW1356, hp 60,welded up sterling 10.25.
converted from 2wd to 4x4
sittin on 36x12.5 goodyears
GETTING CONVERTED TO SHORTBED AS WE SPEAK!

TOW RIG
2002 gmc 2500hd 6.6 duramax 5 speed allison
4x4 extened cab.

2000 F550 Lube Truck (Work Truck)

Certified PA Inspection Mechanic

i'd rather be 6.9'n than cummin or strokin'!
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post #5 of 10 (permalink) Old 06-27-2007, 06:37 PM
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Re: performance upgrades for 6.9

[ QUOTE ]
next week we are headin to haspin acres. gona be fun.

[/ QUOTE ]

Haspin is alot of fun. We were up there last week with about 300 three wheelers having our international trikefest.

But one thing to look at that is quite inexpensive is a ram air wich you could also have be your snorkel

1986 F-250: 6.9L XL 4x4, 4.10 rear, 4 speed, Wellman GPs, 127,000 and chuggin along like new
1985 Mercedes 300SD: Daily Driver, straight piped
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post #6 of 10 (permalink) Old 06-28-2007, 12:15 AM
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Re: performance upgrades for 6.9

I see you got my link 4x4forlife! As cowkiller said, they're front end heavy, but not impossible in the mud. I've had a blast around Michigan in mine. Performance is the old standard, more air and fuel in, more air out.

'84 F250 6.9 w/ 20 k on complete drivetrain rebuild, 33 TSL's. Spray Painted Ford Tractor Blue, Custom Exhaust
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post #7 of 10 (permalink) Old 06-28-2007, 08:57 AM
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Re: performance upgrades for 6.9

[ QUOTE ]
bump the idle up to 900 rpm and idle over everything.

[/ QUOTE ]

Or just do an electrical mod to allow you to manually control your high idle solenoid, and "bump" the idle up at will.

- Mel

1983 F-250HD 4X4
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55MPH at 1400 RPM. 19MPG Avg.

1993 F-350 CC DRW
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1987 Bronco
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post #8 of 10 (permalink) Old 06-28-2007, 11:42 AM
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Re: performance upgrades for 6.9

i am in the process of hooking up a hand throttle, on the shifter. they work great

PLAY TRUCK
1986 F250 6.9,ATS turbo, np435, BW1356, hp 60,welded up sterling 10.25.
converted from 2wd to 4x4
sittin on 36x12.5 goodyears
GETTING CONVERTED TO SHORTBED AS WE SPEAK!

TOW RIG
2002 gmc 2500hd 6.6 duramax 5 speed allison
4x4 extened cab.

2000 F550 Lube Truck (Work Truck)

Certified PA Inspection Mechanic

i'd rather be 6.9'n than cummin or strokin'!
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post #9 of 10 (permalink) Old 06-29-2007, 05:52 PM
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Re: performance upgrades for 6.9

I have an 86 F-350. Where can I go to find turbos and other performance upgrades for my 6.9? I have been looking all over the place, but all I can find is mid-90's and up powerstroke upgrades. Nothing for my little old 6.9. I'd appreciate any help you can give me.
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post #10 of 10 (permalink) Old 06-29-2007, 05:59 PM
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Re: performance upgrades for 6.9

http://www.dps-performance.com/

1986 F-250: 6.9L XL 4x4, 4.10 rear, 4 speed, Wellman GPs, 127,000 and chuggin along like new
1985 Mercedes 300SD: Daily Driver, straight piped
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