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Dick L 
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Joined: 12 Sep 2009
Location: Edon Ohio
Points: 5087
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 Posted: 20 Jun 2013 at 6:31pm |
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If you have not bored and stroked along with a cam grind then anything you do with increasing RPM's only helps as long as you can maintain those RPM's. I would recommend what DrAllis said and go with the 2000 RPM's to see what happens.
I don't like to cheat and I don't like to be cheated. However I would much rather cheat than be cheated.
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mlpankey
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Joined: 13 Sep 2009
Location: Vols country
Points: 4580
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Posted: 20 Jun 2013 at 8:09pm |
I like that Dick. 1st rule to motor sports is have the rule book read thoroughly . 2cnd rule in motor sports is use the rule book on what it specifically says and more on what it doesn't specify to your advantage. Harry Hyde nascar legend said always stay in the grey area of the rule book .
Edited by mlpankey - 20 Jun 2013 at 8:27pm
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blue924.9
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Joined: 22 Mar 2013
Location: George Iowa
Points: 1086
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Posted: 20 Jun 2013 at 10:54pm |
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I am pretty sure the rule book says you have to have a governor that works. It does in every one I have seen
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mlpankey
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Location: Vols country
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Posted: 23 Jun 2013 at 7:02am |
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Newcomer. Doesn't understand stock appearance. Let me give a story as a example. We did a dirt track engine in a class. Had to have a spec intake and heads from brodix a flat tappet cam a flat top piston and a specific head gasket. We intentionally ran the fat top piston above deck for a compression advantage. That motor won four saturday features before being protested by Raeford a engine builder from NC. We got torn down Raeford said these pistons are above deck we said show us in the rule book where a dimension is giving. .for piston deck height . We dominated the rest of the season next season the dimensions were in the rule book so piston couldn't come above the deck.
Edited by mlpankey - 24 Jun 2013 at 3:10pm
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blue924.9
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Joined: 22 Mar 2013
Location: George Iowa
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Posted: 23 Jun 2013 at 12:33pm |
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Ohh took you a few days to fabricate that one. What's the matter getting rusty
Edited by blue924.9 - 23 Jun 2013 at 12:33pm
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Charlie175
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Joined: 11 Sep 2009
Location: Shenandoah, VA
Points: 6358
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Posted: 01 Jul 2013 at 3:59pm |
 DrAllis wrote:
A WD45 runs 1700 RPM wide open no-load.....20% over that is 2,040 RPM. A model D17 stock governor spring will get you 2,000 RPM with a PROPERLY ADJUSTED governor. Sounds pretty simple to me. Both tractors use the same governor weights. I don't know how many more times I need to post this info. |
High Idle is the typical figure most places I see go by and that would be 1400 rpms. 1680 would be his adjust rating, correct?
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Charlie
'48 B, '51 CA, '56 WD45 '61 D17, '63 D12, '65 D10 , '68 One-Ninety XTD
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DrAllis
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Posted: 01 Jul 2013 at 6:23pm |
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High idle/no-load is the typical figure ALL places go by and that is 1700 RPM's high idle/no-load, you sitting in the seat with the throttle clear down as far as it will go. 1700 RPM high idle/no-load is for a WD and WD45. While you're sitting on the seat with the hand throttle lever clear open, when the PTO dyno you are connected to lugs/pulls the engine down to 1400 RPM (while you still have the hand throttle set wide open) they measure the HP/torque of the tractor. 1400 RPM is where the carb butterfly is clear open maximum AND A-C has chosen to measure the performance at. On an A-C this rated speed RPM number is usually(not always) 535 to 540 PTO RPM.
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