timing gears and advancing - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 8 (permalink) Old 09-19-2009, 01:25 AM Thread Starter
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timing gears and advancing

There's not much room to advance the timing on the stock pumps. I took off the front cover and advanced the timing 1 tooth on the pump gear. Wouldnt that be about 8* of advance? I'm not fond of this keyway on the pump & timing gear, I'm used to the adjustability of a p-pump. I havent fired it up yet, waiting on getting a starter.

Dale

my daily driver:67 F100, 300 4V, cammed, 4 spd.
or, 08 Subaloser Forester, 2" lift.
work rigs: 94 IH 4900, DT466(originally 230hp), #0 fuel plate, tighter gov springs, 22* timing
or, 06 IH 7400, DT466E, 300hp


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post #2 of 8 (permalink) Old 09-22-2009, 04:51 AM
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When I still had the rotary, I bumped mine all the way to the head, and that was more than enough for my tastes. If you revved it up real fast with no boost, like you were gonna launch and slip the clutch a little, it would pop, and "backfire" out of the stacks. Sounded cool, but I'm sure it wasn't too kind on the motor.

1992 W250-P-pump and some extra air, gone, but not forgotten.

2003 SVT Cobra

1984 Chevy K10

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post #3 of 8 (permalink) Old 09-23-2009, 12:24 AM Thread Starter
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Isn't pushing it towards the head retarding it?

Dale

my daily driver:67 F100, 300 4V, cammed, 4 spd.
or, 08 Subaloser Forester, 2" lift.
work rigs: 94 IH 4900, DT466(originally 230hp), #0 fuel plate, tighter gov springs, 22* timing
or, 06 IH 7400, DT466E, 300hp


My Low Buck fuel rate site:
www.freewebs.com/nevrenufhp
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post #4 of 8 (permalink) Old 09-23-2009, 02:31 AM
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no, Im almost positive its advanced. I gained power, lowered my EGTs, gained 2 mpg, and lost 3lbs of boost.

1992 W250-P-pump and some extra air, gone, but not forgotten.

2003 SVT Cobra

1984 Chevy K10

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post #5 of 8 (permalink) Old 09-23-2009, 02:43 AM
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Heres a quote from a guy on Oilburners.net with over 3400 posts

"You can just loosen the bolts that hold the pump (3?) and turn it toward the head that will advance it enough or You can also jump a tooth for more extreme results."

1992 W250-P-pump and some extra air, gone, but not forgotten.

2003 SVT Cobra

1984 Chevy K10

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post #6 of 8 (permalink) Old 09-23-2009, 03:11 AM Thread Starter
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ya, makes more sense now. I already jumped it a tooth, and I havent even fired it up yet. I'm jumped a tooth, and timing backed off at the pump mount. We'll see here in a few days.

Dale

my daily driver:67 F100, 300 4V, cammed, 4 spd.
or, 08 Subaloser Forester, 2" lift.
work rigs: 94 IH 4900, DT466(originally 230hp), #0 fuel plate, tighter gov springs, 22* timing
or, 06 IH 7400, DT466E, 300hp


My Low Buck fuel rate site:
www.freewebs.com/nevrenufhp
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post #7 of 8 (permalink) Old 09-27-2009, 03:13 PM
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The Stock/OEM timing of the IP has "O" of the cam gear (lower left) fall on "E" of the IP gear (upper right).

- Advancing the IP timing one tooth has "O" of the cam gear fall on "C" of the IP gear.

However, many who run large injectors still end up pushing the IP to the head even with one tooth advance. This leaves no if little room to work around the IP. If this description fits you, you might consider going ahead and advancing the IP timing two (2) teeth (as shown in the image below) and then pulling the IP back to it's original timing marks (on the outside of the engine/pump).



Hope this helps.
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post #8 of 8 (permalink) Old 09-27-2009, 03:32 PM Thread Starter
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Yep, if guys are going 2 advanced, then I should at least be able to fire it and run it on 1 tooth. I was supposed to get it running yesterday, but the Dodge starter didnt work with my SAE bellhousing. I think I should just get the rest of the Dodge trans adapter, and run a 727 trans, and be done with it.

Dale

my daily driver:67 F100, 300 4V, cammed, 4 spd.
or, 08 Subaloser Forester, 2" lift.
work rigs: 94 IH 4900, DT466(originally 230hp), #0 fuel plate, tighter gov springs, 22* timing
or, 06 IH 7400, DT466E, 300hp


My Low Buck fuel rate site:
www.freewebs.com/nevrenufhp
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