Harley 254e cams

[topcat3815]

Wandering if these cams would benefit from more compression any thoughts?

[strokerjlk]

Wandering if these cams would benefit from more compression any thoughts?

in a factory 103? yes

[BUBBIE]

 

Using those cams in my 103" would NEED me to shave .030 off the heads to match my NOW se255's. (shaving heads used just to compare the difference)

That is a BIG Lack of -14.3 ccc and that is No Power IF Not corrected upward when using that set of cams.

Most just stick them in and Wonder "Why No Power" It is a BIGGER Cam...

Intake closing over..... 30* = Less ccc than the stock cams=Needs More Increases of compression
Intake closing Under....30*= More ccc than the stock cams=Less need for increase of compression

MY simple way to understand When you need more compression added to the mix.

signed....BUBBIE

[UltraNutZ]

Using those cams in my 103" would NEED me to shave .030 off the heads to match my NOW se255's. (shaving heads used just to compare the difference)

That is a BIG Lack of -14.3 ccc and that is No Power IF Not corrected upward when using that set of cams.

Most just stick them in and Wonder "Why No Power" It is a BIGGER Cam...

Intake closing over..... 30* = Less ccc than the stock cams=Needs More Increases of compression
Intake closing Under....30*= More ccc than the stock cams=Less need for increase of compression

MY simple way to understand When you need more compression added to the mix.

signed....BUBBIE

you lost me at "would NEED".  LOL

are you saying that the 255 is a better 103" bolt in cam and the 254e would require headwork to perform properly?

[BUBBIE]

Don't need to Compare My 255's at all.....(but Yes I like My choice of the 103 and My se255's) better is only in the builder/owners/riders eyes.

Just saying that using the 254e's Without Other needed compression work will Not give you the power from that choice.

Using the stock cams,,,,,, to compare would show the LOSS of -12.7 compression when JUST using the 254e's.

NOT suggesting any cams... Just showing the Loss of ccc IF nothing else is done to increase compression...

signed....BUBBIE

[UltraNutZ]

ah.. gotcha now... gracias

[strokerjlk]

They don't do to bad in a 96 or 103 . Short duration helps em out .
They just work Better with a little compression . But if your gonna use them and spend money for head work , there are better options .

[rigidthumper]

I tried em at 10.5:1 in the bosses bike as an experiment.  Nothing earth shattering. 

[DrSpencer]

Don't need to Compare My 255's at all.....(but Yes I like My choice of the 103 and My se255's) better is only in the builder/owners/riders eyes.

Just saying that using the 254e's Without Other needed compression work will Not give you the power from that choice.

Using the stock cams,,,,,, to compare would show the LOSS of -12.7 compression when JUST using the 254e's.

NOT suggesting any cams... Just showing the Loss of ccc IF nothing else is done to increase compression...

signed....BUBBIE

I have SE255's in my 2011 103" Street Glide.

Great cam, but gets a little hot for my liking (typically ~255-275*)

I'm using a TTS tuner, with about 4-5 V-tune runs on their canned map.

Will advance DIY tuning help the heat (don't want to pay for a Dyno tune), or should I just get used to it?

Thanks

[UltraNutZ]

Don't need to Compare My 255's at all.....(but Yes I like My choice of the 103 and My se255's) better is only in the builder/owners/riders eyes.

Just saying that using the 254e's Without Other needed compression work will Not give you the power from that choice.

Using the stock cams,,,,,, to compare would show the LOSS of -12.7 compression when JUST using the 254e's.

NOT suggesting any cams... Just showing the Loss of ccc IF nothing else is done to increase compression...

signed....BUBBIE

I have SE255's in my 2011 103" Street Glide.

Great cam, but gets a little hot for my liking (typically ~255-275*)

I'm using a TTS tuner, with about 4-5 V-tune runs on their canned map.

Will advance DIY tuning help the heat (don't want to pay for a Dyno tune), or should I just get used to it?

Thanks

you need a good solid Dyno by someone who knows what they're doing to get the heat out.  Nature of the 255 cams.

[motolocopat]

I had the 254e cam kit which includes the tuner and heavy clutch installed with 0 miles on the bike as part o my original setup so I can't really compare it to the stocker. Breathes through a SE Ventilator intake and V&H Powerduals. Bike pulls away nice and cleanly from 2000RPM up.
Not sure how much it is needed but at some point I plan on having it tuned properly and wondering if at that time I should stick a .30 head gasket in at the time help maximize the gain ...
What might that gain be?