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[kng103]

i am having my bike picked up on friday.
i like the fact that the heads say se-103.
so with that, i am going to have my heads ported and flowed with new springs. the squish measured and corected, and the se-251 cam. at my stealers recomendation.
i will post the results as soon as i get them.
it's still pretty chitty here in new york.
right now i have 92/92

[PCC]

KNG103

Make sure to ask them about valve seal clearance on those heads. Somewhere else on this site there is a post about minimum clearance at .080 and that the 251 cams would put that clearance at .026. Don't want to have the valave keepers contacting the tops of the seals. if those go you'll have oil all over the place.

[DavidB]

CVO 253 Cam Specs [smiley=gossip.gif] [smiley=gossip.gif]

Lift  @ Valve   Intake .536 /  Exaust .537

Duration@.053   Intake 239  / Exaust 256

Timing   Intake  open 7 deg BTDC/close 52 deg ABDC
            Exaust  open 59 deg BBDC/ close 17 deg ATDC

TDC Lift @ Valve / Intake 0.117   Exaust 0.157

I cant find the LSA            [smiley=gossip.gif]          

[larouchedem]

DavidB,

Using your numbers, the LSA is 111.75, with 3/4 of a degree of retard ground in [112.5/111 lobe centers].
Dave


link=board=CVO_TC;num=1089202441;start=15#17 date=01/11/05 at 21:31:38]CVO 253 Cam Specs [smiley=gossip.gif] [smiley=gossip.gif]

Lift

[DavidB]

Hey Dave,
   I give up ,
          How`d you do that ?

[larouchedem]

Hi DavidB,

To get intake C/L, divide duration by two, and subtract opening [239/2-7 = 112.5]
To get exhaust C/L, divide duration by two, and subtract closing [256/2-17 = 111].

Add the two and divide by two to get LSA [ 112.5+111=223.5/2=117.75]

If intake C/L number is smaller than exhaust C/L number, the cam is ground with advance. If opposite, vice-versa.
Dave


link=board=CVO_TC;num=1089202441;start=15#19 date=01/12/05 at 00:54:16]Hey Dave,

[kng103]

PCC,
where is that posted?
shouldn't they check all of the clearance before putting everything back together?

[mfgreen]

PCC,
where is that posted?
shouldn't they check all of the clearance before putting everything back together?

king 103 how ya doin,
have your wrench clay the motor and give you the exact results then you will be able to see along with your wrench exactly what is going to be involved with the finishing steps gasket thickness etc.

[JCZ]

kng 103, just to add to MFG's post.......a motor should ALWAYS be clayed on a rebuild.  If your wrench is telling you that it's not necessary, he's gambling with your baby.  JMHO

[kng103]

thanks guy's,
but that is what squish refers to.

[mfgreen]

thanks guy's,
but that is what suish refers to.

just lookin' out for ya ....some of the wrenches try to give you that info based on mathematical calculation(cyphering) and it is not as reliable as they try to make ya think....in their defense...it does bring more jobs into the shop

[larouchedem]

All,
I've never seen one apart, but unless I'm confused, little to no quench action occuring in these engines. Afaik, since the chamber is full round, and the piston flat, there can't be. That's assuming [on my part] that the diameter of the bottom cut on the cylinder matches the bore diameter. I suppose that if the outside diameter of the bottom cut in the chamber is smaller than the bore, there may be a little quench action. Damned little though, imo.

Further, this is why I blabbered on about the possibility of using the slanted quench surface domed HTCC stroker pistons in these engines. Both to add compression, and allow for quench action. What SBCharlie is doing would also do both [welding chambers ifor a bathtub of other shape and creating a flat quench design].
Dave  

[hd2003-se2005]

Still waiting on results from  "kng103"

[kng103]

bike is done.
still pretty cold here in ny.
i am going to take it out saturday.
they shaved 30 thousands of an inch off each of my cylinders.
set the squish at 38 thousands.
have to wait until i can have it dyno tuned.

[kng103]

took the bike out for a nice ride this weekend.
what a seat of the pants difference!
work was worth every penny.
cant wait to have it dyno'd to see the numbers.