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Twin Cam 103 Cam Testing

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Old Oct 23, 2019 | 07:34 PM
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I will be following along as I am planning to upgrade my camshafts this winter. I have been reading good things about the cycle rama 570-2. Hoping you post up good results with it. By the way I will be ordering from FM they are topnotch. Dennis
 
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Old Oct 23, 2019 | 09:34 PM
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Originally Posted by PoCoBob
Looks like your bike is a Switchback? Are the differences between a 103, 103HO and 103 Twin Cooled going to matter in these tests? Or will the performance improvements be similar regardless which version of the 103 we have?

I like that they are using the same bike, and just switching the cams... Keeping everything else the same, should give a good comparison of the cams......

I would suspect that the differences between the cams would, for the most part, carry over to any stock 103 engine...
 
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Old Oct 23, 2019 | 10:25 PM
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Originally Posted by PoCoBob
Looks like your bike is a Switchback? Are the differences between a 103, 103HO and 103 Twin Cooled going to matter in these tests? Or will the performance improvements be similar regardless which version of the 103 we have?
Yes, we are using a Dyna Switchback for our testing. All of the 07-later 103 air cooled A engines are identical with the exception of the 14-later HO cam which we are removing anyway, performance between the twin cooled version is generally +/- 2%. The Dyna does use slightly smaller throttle body than the throttle by wire touring models, for exhaust we are using our E-Series which works well across the board, and since we are using the same configuration for each test it will be a pretty good representation. Our baseline runs were pretty well identical to most 103’s we test.
 
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Old Oct 24, 2019 | 07:30 AM
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Default Cam comparo
FWIW Moonshine H-D has a terrific you-tube vid on M-8 cams.
Very informative
 
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Old Oct 24, 2019 | 09:29 AM
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Originally Posted by blackjeep
Would love to see a selection of SE cams just for comparison sake.
maybe the standards (255,254,204 etc.)
The cams they are testing all out perform the Screamin Eagle ones, no point testing those.
 
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Old Oct 24, 2019 | 09:49 AM
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Originally Posted by eighteight
FWIW Moonshine H-D has a terrific you-tube vid on M-8 cams.
Very informative

For those interested we've done separate Milwaukee-8 107 and 114 cam tests which are posted on the FM University site:

https://university.fuelmotousa.com/a...haft-shootout/

https://university.fuelmotousa.com/a...haft-shootout/
 
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Old Oct 24, 2019 | 02:09 PM
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Originally Posted by Fireball Jack
This is what I have been looking for. Same bike same set up Woods 222 vs Andrews 48-57 Cycle-Rama 570-2 575 and S&S mr103. I am doing cams this winter.
Same here. Most interested in the EZ Start mr103, at this point. Getting my popcorn ready.
 
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Old Oct 24, 2019 | 03:14 PM
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Originally Posted by tundra
Same here. Most interested in the EZ Start mr103, at this point. Getting my popcorn ready.
The S&S MR103 was got me looking at cams, now the cycle-rama 570-2 has my attention. Looking forward to the results.
 
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Old Oct 24, 2019 | 03:39 PM
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I have an 11 Limited sidecar rig and could use some stump pulling torque. Stock with Heavy Breather and full Rinehart exhaust with a FM Powervision.
I cant wait for the tests since i have pondered a cam change lately.

I have subscribed to this thread
 
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Old Oct 24, 2019 | 06:59 PM
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Originally Posted by blackjeep
Would love to see a selection of SE cams just for comparison sake.
maybe the standards (255,254,204 etc.)

I agree. I hope you guys include the SE cams too.

.
 
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