Twin Cam Motors Twin Cam 1998 thru 2017

S&S reed valve for 124TC build

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  #11  
Old 04-22-2024, 08:25 PM
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Originally Posted by tdrglide
SE pump. At that time the S&S pump did not yet exist, i believe, maybe10 years ago. I checked clearance behind pump to reed valve. There is a spring washer that goes between.

I read their reasoning for them but had no issues without, and having functioning stock breathers.
Yeah,, IIRC the Current SnS didn't come out until about 7-8 years ago. They did have the Gear Drive version before that which seemed to work pretty well but was pricey and you had to use their cams.
 
  #12  
Old 04-22-2024, 08:31 PM
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Originally Posted by pawhite
Hi Everyone,

Building a 124 TC bottom to top.

Included with the Crankcase was a crankcase breather reed valve?

I’ve heard mixed reviews on this part.

Can some of the builders out there please explain, so that I can make an informed decision as to fit or not to fit?
It should also be noted that I’ll be using the TC3 S&S oil pump which is compatible with the reed valve.

Best regards

Do you by any chance have a picture of the oil pickup in the crankcase for the SnS case?

FWIW I had early gen 1 or 2 cases that HD claimed infringed on the HD patent so SnS stop making them. IIRC the patent finally ran out.. My cases came with the reed valve but I didn't use it. At the time many that tried the reed valve in motors had issues with sumping..
 
  #13  
Old 04-23-2024, 08:57 AM
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Old 04-23-2024, 09:14 AM
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[QUOTE=Max Headflow;21655506]Do you by any chance have a picture of the oil pickup in the crankcase for the SnS case?

Above is a picture with the reed valve partially fitted for reference.

I haven’t got any pics with the cases split. I’ve set my end play and sealed the thing together…

FWIW this is the newest version of the T-series case with an ‘A’ at the end of the part number.
 
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  #15  
Old 04-23-2024, 10:06 AM
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[QUOTE=pawhite;21655979]
Originally Posted by Max Headflow
Do you by any chance have a picture of the oil pickup in the crankcase for the SnS case?

Above is a picture with the reed valve partially fitted for reference.

I haven’t got any pics with the cases split. I’ve set my end play and sealed the thing together…

FWIW this is the newest version of the T-series case with an ‘A’ at the end of the part number.

It that the reed valve system modification I have attached below from your picture.

Obviously the cam case cover is different also.

 

Last edited by Jackie Paper; 04-23-2024 at 10:08 AM.
  #16  
Old 04-23-2024, 11:36 AM
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No the valve is the thing on the pinion shaft. S&S Pn 310-0742. It sits between the RH bearing and the oil pump.
 
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Old 04-23-2024, 12:14 PM
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Originally Posted by pawhite
No the valve is the thing on the pinion shaft. S&S Pn 310-0742. It sits between the RH bearing and the oil pump.
Thank you..

Now I see them. So the finial breathing is up thru push rod covers and out thru the one way out popet valve in head.

Not sure exactly the need or real purpose. Normal crank side base pressure comes thru roller crank bearing and also up head drains.



 

Last edited by Jackie Paper; 04-23-2024 at 12:24 PM.
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