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I have a few on mine, currently non turbo, but larger exhaust and intake helped, and the next project is to get the opening into the grille done. Fuel screw is turned up some, messed around with the timing, but kind of wishing I hadn't as I can't seem to get it right where I want, smokes a light haze more easily than I like... maybe I can score a good used turbo one of these days when I actually can afford it... someday...
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the workhorse:86 F250 4x4 6.9 Diesel 4-spd, 4.10 axles
the other workhorse 92 F350 2wd crew cab,3.55 rear axle, 92 6bt Cummins, NV4500
the project: 78 F150 4x4 shortbed 351 auto Iowa Chapter leader, ASE certified parts specialist
Come on down and join us in the Iowa chapter, or your own local chapter!! Thanks, Roger
Gotta go scavenger hunting in the junkyards, ya' never know when you'll find gold. Turbo rebuild kits are cheap.
Can you actualy measure the timing on an IDI? If you can you'll find your best power around 4* ATDC....especially with some compressed air going in
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Scott
His: 01 F-250 Lariat, 7.3, ZF-6, NV271. A few mods
Hers: 06 Freestar SEL 4.2l
79 Bronco Ranger XLT.. used be the driver, now waiting to become the project.
96 Grand Marquis LS... 25 mpg commuter
I had been hear ing 8 degrees... I don't have the equipment to time them, but it can be done... luminosity probes. I see used turbo setups for 800 or so, just gotta have that much to let go of...
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the workhorse:86 F250 4x4 6.9 Diesel 4-spd, 4.10 axles
the other workhorse 92 F350 2wd crew cab,3.55 rear axle, 92 6bt Cummins, NV4500
the project: 78 F150 4x4 shortbed 351 auto Iowa Chapter leader, ASE certified parts specialist
Come on down and join us in the Iowa chapter, or your own local chapter!! Thanks, Roger
The 4* ATDC or a little faster is for the liminosity probe method used on the 6.9.
The 8.5* BTDC is for the pulse method used on the 7.3 engines.
The pulse method is set according to the fuel pulse on the way to the injector.
The luminosity method is set by when the fuel actually starts to burn in the precombustion chamber.
Both methods end up at about the same place in the end.
The difference is what equipment is used and what that equipment is looking for to detect the cylinder firing.
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86 F250 HD 6.9 IDI ATS turbo "not exactly" stock 4x4 T19 BW1345 3.55LS both ends D60 front, 10.25" Sterling rear, ram air, dual stacks.
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someday... 
