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Old May 16, 2023 | 03:46 PM
  #71  
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Originally Posted by 98hotrodfatboy
That much of a loss??
Absolutely.. When my 131 sumped, it felt like it was dragging and anchor...

BTW it's not good on the motor to run it that hard when sumping.

I'd wonder if it's possible but if running a stock oil pump, could the ge rotors be swapped?

When pulling down for checking the pump, double check the external marks. If they are off you'll see it.. It won't be the inner cam timing as the CCPs 220/220 are the same.
 
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Old May 16, 2023 | 04:15 PM
  #72  
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Originally Posted by Max Headflow
The CCP calculators say about 197 with the 32 degree intake close..

I don't have a TC 103 manual but I'd suspect that 175 is a cool / cold CCP.

One thing that should happen riding that way would be very high oil temps if run for any period of time..

What did the dyno guy say?
It does feel like it's running hot, but I haven't had any normal riding days. It's been cold here still so it's hard to tell.

The master tech who did the dyno said "something is wrong with either the tune or the engine, don't ride it, We're booking out over a month."

 
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Old May 16, 2023 | 08:09 PM
  #73  
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Originally Posted by Max Headflow
Absolutely.. When my 131 sumped, it felt like it was dragging and anchor...

BTW it's not good on the motor to run it that hard when sumping.

I'd wonder if it's possible but if running a stock oil pump, could the ge rotors be swapped?

When pulling down for checking the pump, double check the external marks. If they are off you'll see it.. It won't be the inner cam timing as the CCPs 22
0/220 are the same.
Been reading up on symptoms of sumping and it sounds just like what I am feeling. So, what's my next step? Should I bother trying to measure what's in the case or just crack it and start looking for missing/ripped O-rings or anything else amiss?
 
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Old May 16, 2023 | 08:17 PM
  #74  
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There is a drain plug on the bottom of the case.. I would pull it and see how much oil your getting in there.. The cam chest will also hold a little bit but that's nothing to worry about. And yes it's a good possibility that the oil pump did not seat properly into the case or the scavenge side where the O-rings is..

​​​​​​
 
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Old May 16, 2023 | 08:25 PM
  #75  
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Originally Posted by Max Headflow
The CCP calculators say about 197 with the 32 degree intake close..

I don't have a TC 103 manual but I'd suspect that 175 is a cool / cold CCP.

One thing that should happen riding that way would be very high oil temps if run for any period of time..

What did the dyno guy say?
I would like to know what calculator your using..
A stock 103 comes out with 9.6:1 compression with a 34° IVC. He only went to a 32° IVC.. So if anything he might have picked up to 9.7..... He didn't change the head gaskets nothing, no cylinder heads no nothing.. So there's no way he's going to have 220 psi cranking pressure unless the cams are off to the crank... And yes with both cylinders being equal, I would say the cams are on to each other..
 
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Old May 16, 2023 | 08:30 PM
  #76  
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Originally Posted by 98hotrodfatboy
I would like to know what calculator your using..
A stock 103 comes out with 9.6:1 compression with a 34° IVC. He only went to a 32° IVC.. So if anything he might have picked up to 9.7..... He didn't change the head gaskets nothing, no cylinder heads no nothing.. So there's no way he's going to have 220 psi cranking pressure unless the cams are off to the crank... And yes with both cylinders being equal, I would say the cams are on to each other..
Bigboys
 
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Old May 16, 2023 | 08:35 PM
  #77  
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Originally Posted by 98hotrodfatboy
There is a drain plug on the bottom of the case.. I would pull it and see how much oil your getting in there.. The cam chest will also hold a little bit but that's nothing to worry about. And yes it's a good possibility that the oil pump did not seat properly into the case or the scavenge side where the O-rings is..

​​​​​​
It's not a drain plug, it's a passage plug.. I've yet to remove one..

BTW, I don't know if it's possible but with the pressure the OP is reading, I'd wonder if he somehow managed to swap feed and scavenge gerotors.
 
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Old May 16, 2023 | 10:18 PM
  #78  
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Originally Posted by Max Headflow
It's not a drain plug, it's a passage plug.. I've yet to remove one..

BTW, I don't know if it's possible but with the pressure the OP is reading, I'd wonder if he somehow managed to swap feed and scavenge gerotors.
Oil pump didn't get removed from the cam plate, came out as one unit and went back in that way...all still MoCo original.
 
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Old May 16, 2023 | 10:28 PM
  #79  
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Sounds like I'll have to depend on the quantity of oil out of the pan to determine if anything is trapped on the crank side of the case?
  • Get it up to operating temperature.
  • drain oil from the pan to get a measurement.
  • crack the cam chest, check timing, O-rings, etc.
  • refill with oil equal to what came out of the pan so as to not overfill.
Sound right?
 
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Old May 16, 2023 | 11:10 PM
  #80  
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Originally Posted by snake_eyes
Oil pump didn't get removed from the cam plate, came out as one unit and went back in that way...all still MoCo original.
Ahh yes,, The flat rate trick the comes back to haunt.
 
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