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Author Topic: Valve lift  (Read 813 times)

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TonyO77

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Valve lift
« on: June 05, 2021, 05:18:55 PM »

Anyone know the maximum lift cam a 04. 103” will take with factory heads?
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HD Street Performance

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Re: Valve lift
« Reply #1 on: June 05, 2021, 05:21:51 PM »

.600 will work
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TonyO77

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Re: Valve lift
« Reply #2 on: June 05, 2021, 06:15:24 PM »

It that with the factory springs?
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HD Street Performance

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Re: Valve lift
« Reply #3 on: June 05, 2021, 07:30:06 PM »

Yes, contrary to screaming eagle catalog, I know
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TonyO77

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Re: Valve lift
« Reply #4 on: June 05, 2021, 08:10:18 PM »

Any idea what factory lift is and what canes came in them?
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Twolanerider

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Re: Valve lift
« Reply #5 on: June 05, 2021, 11:30:26 PM »

Any idea what factory lift is and what canes came in them?

The stock cams in a 103 were the SE253 or HD part # 25376-03. 


Intake    .530 lift      237 duration  open 9 BTDC close 51 ABDC
Exhaust  .530 lift     252 duration  open 62 BBDC close 17 ATDC

Proper citation where it belongs; the lift and duration I remembered. The rest were stolen from a post of Shrader's from a long time ago.
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