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| techtalk:evo:oil03g [2021/03/31 07:35] – [Volume and Flow Comparison] hippysmack | techtalk:evo:oil03g [2024/01/05 03:34] (current) – hippysmack | ||
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| ====== EVO: Oiling & Lubrication - Sub-03G ====== | ====== EVO: Oiling & Lubrication - Sub-03G ====== | ||
| - | ====== Comparing the 03-06 and the 07 Style Oil Pumps ====== | + | ====== Comparing the 98 and the 07 Style Oil Pumps ====== |
| - | * Below is a collection of comparison pics between the (98-06 style pump) and the (07 and up style pump). Click on a pic to enlarge. | + | * Below is a collection of comparison pics between the (98-06 style pump parts) and the (07 and up style pump parts). Click on a pic to enlarge. |
| * The 98-06 pump and internals are all the same except for these [[techtalk: | * The 98-06 pump and internals are all the same except for these [[techtalk: | ||
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| ====== Volume and Flow Comparison ====== | ====== Volume and Flow Comparison ====== | ||
| - | See also this XLForum discussion starting around post #140: http:// | + | See also this XLForum discussion starting around post #140: https://www.xlforum.net/ |
| + | [[http:// | ||
| The scavenge gerotors in the 07 oil pump are considerably taller than in 06-prior oil pumps which easily points to the 07 scavenge side pumping out more oil from the motor. \\ | The scavenge gerotors in the 07 oil pump are considerably taller than in 06-prior oil pumps which easily points to the 07 scavenge side pumping out more oil from the motor. \\ | ||
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| The wider tooth profile allows for more oil delivery. \\ | The wider tooth profile allows for more oil delivery. \\ | ||
| It's the area between the gearset teeth (inner and outer) that determines the amount of oil delivered no matter what the OD of the gearset is. \\ | It's the area between the gearset teeth (inner and outer) that determines the amount of oil delivered no matter what the OD of the gearset is. \\ | ||
| - | So the change in OD was a mechanical necessity. \\ | + | So the change in OD was more of a mechanical necessity |
| **Tooth Profile**: \\ | **Tooth Profile**: \\ | ||
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| However, due to the wider tooth profile, the MoCo was able to deliver nearly the same amount of oil with a thinner gerotor set. \\ | However, due to the wider tooth profile, the MoCo was able to deliver nearly the same amount of oil with a thinner gerotor set. \\ | ||
| In essence, the practice of changing oil volume now has a plan B (changing tooth profile). \\ | In essence, the practice of changing oil volume now has a plan B (changing tooth profile). \\ | ||
| + | However, the 07 feed gerotors do deliver slightly less feed oil than 86-06 pumps. \\ | ||
| - | The magic is there! That explains why the feed gerotors still keep their oil moving capacity in spite of them now having less height. ((xLoneRiderx of the XLFORUM | + | The magic is there! That explains why the feed gerotors still keep their oil moving capacity in spite of them now having less height. ((xLoneRiderx of the XLFORUM |
| The outer gerotors' | The outer gerotors' | ||
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| According to the drawing, the 2007 oil pump has a 7% decrease in feed flow and a 52% increase in scavenge flow over the 1998-2006 oil pump. \\ | According to the drawing, the 2007 oil pump has a 7% decrease in feed flow and a 52% increase in scavenge flow over the 1998-2006 oil pump. \\ | ||
| - | {{: | + | {{: |
| - | ====== Visual Differences and Dims ====== | + | |
| + | ====== Visual Differences and Dims ====== | ||
| * Dimensions shown below are approximate. The 98 pump shown below is used with some probable wear. The intention is to show major differences in the two pump versions only. | * Dimensions shown below are approximate. The 98 pump shown below is used with some probable wear. The intention is to show major differences in the two pump versions only. | ||
| * The outside of the pump bodies are visually the same except the 07 is slightly taller and the bottom cover has different casting numbers. | * The outside of the pump bodies are visually the same except the 07 is slightly taller and the bottom cover has different casting numbers. | ||
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| | 98 and 07 oil pump internals ((photos by Hippysmack of the XLFORUM)) | | 98 and 07 oil pump internals ((photos by Hippysmack of the XLFORUM)) | ||
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| * The 98-06 pump body has two bumps inside to hold the separator plate in place with 2 separate bores for the two different O.D. gerotors. | * The 98-06 pump body has two bumps inside to hold the separator plate in place with 2 separate bores for the two different O.D. gerotors. | ||
