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[hdrider53]

SE has a new cam called the SE-259E. With this cam at 47 intake closing and .030 head gasket my numbers are.
Sea level 9:3.1 CC and 193.3 CCC thats seems like an OK range. At my elevation its way lower the CCC drops to 165.9.
It has a .579 lift on intake and exhaust and the MCR heads are supposed to be good top .585.

This may be a good option as I wont have to pay to have the heads opened up more. Just as long as the torque and HP numbers stay strong I'm happy. I'm learning that calculator is a cool little tool.

[hdrider53]

That calculator is great if you use it right. I forgot to put in the 76 cc combustion chamber. Here are the correct numbers.
Sea level 9:59 CC and 201 CCC at 5000 foot elevation its CCC is 172.
Plus I read that those cams work better with high compression engines.

[Tom149]

That calculator is great if you use it right. I forgot to put in the 76 cc combustion chamber. Here are the correct numbers.
Sea level 9:59 CC and 201 CCC at 5000 foot elevation its CCC is 172.
Plus I read that those cams work better with high compression engines.

hdrider53,

When I ran the numbers with the SE259E (intake close 47), 76cc MCR heads, 0.040 head gaskets, 0.00 decking, and a  -1.5 piston dome value, I got the following:

10.89:1 Static compression
9.69:1  Corrected Compression
203.7 CCC @ sea level
173.1 CCC @ 5280 ft

IMHO I believe that these numbers could still produce tuning problems at our altitude (5280 ft), with our unreliable gas, but especially at lower altitudes with potentially unreliable gas.

Hopefully someone with more knowledge and experience will chime in here!

Tom

[hdrider53]

I ran my numbers with the stock .045 gasket.

[Tom149]

I ran my numbers with the stock .045 gasket.

hdrider53,

When I ran the numbers with the SE259E (intake close 47), 76cc MCR heads, 0.045 head gaskets, 0.00 decking, and a  -1.5 piston dome value, I got the following:

10.77:1 Static compression
9.59:1  Corrected Compression
201.0 CCC @ sea level
170.8 CCC @ 5280 ft

IMHO I believe that these numbers could still produce tuning problems at our altitude (5280 ft), with our unreliable gas, but especially at lower altitudes with potentially unreliable gas.

This might be a viable option: When I ran the numbers with the SE259E (intake close 47), 76cc MCR heads, 0.055 head gaskets, 0.00 decking, and a  -1.5 piston dome value, I got the following:

10.55:1 Static compression
9.40:1  Corrected Compression
195.8 CCC @ sea level
166.4 CCC @ 5280 ft

I believe the 0.055 gaskets are available either SE or Cometic for a 3.875 bore. They may even be included in the kit you purchased.

Hopefully someone with more knowledge and experience will chime in here!

Tom

[HD Street Performance]

Hold the phone
Slow the mustang down there

Adding squish distance is a ping enhancer. The .030 gasket acts as a hedge against pinging assuming the pistons are at 0 deck or close to it. That tighter squish comes without the typical problems of added compression
The SE heads are not 76cc and most of them CC at 79+cc
Use the compression calculators to target 195CCP at sea level and there will be a much happier motor
At altitude with less air pressure cams on the shorter side perform well
Consider the Woods TW5, the heads at an adjusted 85cc with mild port work and squish grooves added

Follow my lead here and this bike will rip.

[hdrider53]

HD must not know what they are doing if the CCC issue is that important.
The kit I bought comes with the 103 BB, flat top pistons, SE255 cam. They sell it as a kit for the 96 inch build.
If you take those numbers put them into the calculator with the stock 85cc heads which is how they are selling the kit and they must be assuming your doing Big bore and cam only. Plus using the stock .45 head gasket to calculate being thats whats probably in the kit.

The numbers are 9.55:1 and 199.8 CCC. So they are selling a kit to consumers that according to most
folks on CVO forum say will a pinger because of the 199.8 CCC . Then why would they build such a kit?
I would assume they would know what the end CCC would be for this kit and would not sell it if they considered the CCC to high.

If I run the numbers back again with BB, flat top and MCR heads then using the Andrews TW67 cam they are almost identical as to using the stock heads and SE255 cams 9.54.1 and 199.6. So if I decide to continue on then it looks like they may be the right fit, even though the CCC is still considered high by most. If I do how well does the TW67 perform overall.

Oh well I'm about to cancel my order with Zanottiis on the heads and such and just put in the BB kit and have my stock heads tuned up a bit. I bought the new BB kit on Ebay so I own it as such.with the SE255 cam.

[HD Street Performance]

And what makes you believe HD has it together all the time? They do a lot of the time but then there are the goofs.

The Stock 2007 and 2008 SE Police 103 has a stock 38° intake close cam and they had to recall and retrofit them with ACRs similar to what the 110 motors use, wonder why? The newer police 103s have the releases from the factory. OK so using basic logic you take the same motor, identical, and fit a 25° intake close cam and what happens? The SE kit is just that.

BTW just as a point of reference the new ultra limited 103 has ACR solenoids fitted as well.

[eleft36]

No start problems here. '07 FXSTC
I did the SE BB Cylinder conversion kit with SE Flat top Cast piston kit, the SE Head gasket 16787-99 and Andrews 26H cams.
It's smooth, quiet and idles better than the stock @ 96". Mileage is 38 to 44 depending on the trip length.

Al

[hdrider53]

how thick was that SE head gasket?

[HD Street Performance]

.045 same as the stock HG compressed

[HOGMIKE]

And what makes you believe HD has it together all the time? They do a lot of the time but then there are the goofs.

The Stock 2007 and 2008 SE Police 103 has a stock 38° intake close cam and they had to recall and retrofit them with ACRs similar to what the 110 motors use, wonder why? The newer police 103s have the releases from the factory. OK so using basic logic you take the same motor, identical, and fit a 25° intake close cam and what happens? The SE kit is just that.

BTW just as a point of reference the new ultra limited 103 has ACR solenoids fitted as well.

 
Yep, same motor as the cop bikes and the 3-wheeler.

[hdrider53]

OK finally made a decision, most won't like it but I wanted everything Screamin Eagle.
I ordered a set of SE-259E cams from Zanottis along with a set of Tapered adjustable push rods.
If I don't like them later it would be easy enough to swap back out without opening up the top end.

If Deweysheads  is correct and the SE MCR heads are 79 cc instead of the 76 cc listed in the book then my numbers feel safe to me. The numbers with the .045 head gasket will be 9.31:1 and 193.3. I can live with those.
Also I mainly ride in Colorado if I do make a sea level trip its a week at best per year.
I'm adding manual CR to protect my starter. If I have tune or ping problems I will switch out the cam then.
Once I get it built and broken in I will try to get a dyno run on it. If I'm 105 hp plus and 110 plus on the torque or more I'm happy.

Thanks for making me realize how the SE255 would not have worked well with these heads.
Thanks everyone for all your help and advice

[HD Street Performance]

Maybe you read me wrong I use SE parts but pick and choose them then have a good tuner that can bring them in line and not rely on a canned map.
Your logic makes sense and at least the parts are balanced. The quality of how it runs will depend on matching the CCs of the heads and assuring they are 79 or above not just taking my word, checking deck height and correcting that if the pistons are way down in the holes or very uneven.

[hdrider53]

Got my 103 Big bore cylinders and pistons installed.
Checked the deck and it's .010 inch on both sides.
So that gives me a little extra room to work with. Once I get the heads from Zanottii
I will check the volume if it is more like 79cc instead of 76cc I'm good to go.