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Author Topic: SE-253 cam specs  (Read 31670 times)

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SHRADER

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Re: SE-253 cam specs
« Reply #30 on: May 01, 2005, 08:36:16 PM »

I was looking through some stuff and found contradictory information. A tech tip dated from January of this year lists the following different specs for the cvo 253 cam.

Intake    .536 lift   239 duration   open 7BTDC close 52 ABDC
Exhaust  .537 lift   256 duration   open 59BBDC  close 17 ATDC

Don't know which one is correct?

REGARDS
SHRADER
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DCFIREMANN

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Re: SE-253 cam specs
« Reply #31 on: May 01, 2005, 09:02:26 PM »

Shrader have you ever installed a screamin eagle 103 kit? The catalog says the kit comes with the 253 cams. Just wondering if they send a timing card with the kit? If I get a chance this week I'll try to get a card on the cams if in fact they are even available. I really don't know why this is such a secret.

To me it doesn't matter I want to take the chains out of the motor. But to some of the other owners it might come in handy at some time or another. Stay safe.

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kng103

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Re: SE-253 cam specs
« Reply #32 on: May 02, 2005, 08:01:33 AM »

Quote
I was looking through some stuff and found contradictory information. A tech tip dated from January of this year lists the following different specs for the cvo 253 cam.

Intake
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the O`Fender

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Re: SE-253 cam specs
« Reply #33 on: May 02, 2005, 11:59:09 AM »

Quote

either way the duration is way to long.


Too long for what? oodles of torque@low rpm's!!!!
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spydglide

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Re: SE-253 cam specs
« Reply #34 on: May 02, 2005, 12:42:13 PM »

Quote

Too long for what? oodles of torque@low rpm's!!!!

"Oodles of Torque at low RPM's"...........now, THAT'S for me!  [smiley=huepfenlol2.gif]
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shovelhead71

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Re: SE-253 cam specs
« Reply #35 on: May 02, 2005, 02:50:04 PM »

was looking seriously at changing cams sat - trying to identify the 103 cylinder heads as to what they are - are they already ported for good air flow ? look up part numbers and what the talon parts sytem shows is not what is shown in the hd catalog ? also these have cast pistons in the stock 103's and not very confident on having these in a higher rpm engine - would just as soon go with forged PRO pistons for any larger cam than a .253 - also forged pro's better compression builders. so sat just switched out with the rineharts full exhaust with the high performance baffles - major change in performance right now.
anyone seen the new HD poster with the big knots in the exhaust piped kicking the epa?
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osmacat

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Re: SE-253 cam specs
« Reply #36 on: May 03, 2005, 09:23:30 AM »

Hey Shovelhead, How do you like the Rineharts with the performance baffle? What is the difference in the baffle? An earlier thread said that the guys at Rinehart thought these baffles were to small for the 103. What do you think?
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Re: SE-253 cam specs
« Reply #37 on: May 08, 2005, 04:54:23 PM »

Quote
I will probably go with the zippers 50mm, if i don't send mine to bc gerolmy to be reworked.


Kng,

BC Gerolamy will have an exchange unit soon for the SEEG2 as I am upgrading to their 50 mm twin throat and they are buying my stock one of me. They will be bringing the unit back to California after having come over here to tune my bike in late May 2005.

I hope this helps.
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Jordan1200

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Re: SE-253 cam specs
« Reply #38 on: January 06, 2019, 07:24:06 AM »

Many times on this site I have seen reference to the mystery cam specs of the SE-253 cam that comes stock in 103's.

Here are the specs for the cam as posted in little known  2003 technical forum that has long since been deleted from H-D's dealer only site.

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

Just for everyones info.
REGARDS
SHRADER
Dunno where you got these numbers but this is an old post so doubt there will be a response.
This is straight from the harley docs on the stock and 103 and others


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Jordan1200

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Re: SE-253 cam specs
« Reply #39 on: January 06, 2019, 07:32:18 AM »

Dunno where you got these numbers but this is an old post so doubt there will be a response.
This is straight from the harley docs on the stock and 103 and others


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I see these are specs for older bikes
253 cam specs listed in it from MoCohttp://cloud.tapatalk.com/s/5c31f53c249cc/older%20HarleyCamSpecs.pdf

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