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[North Star]

On a 110 with heads that were not milled what would the compression ratio be with just the .030 head gaskets?

I think stock is 9.3-1.

[Unbalanced]

averaging that the pistons are more than likely in the hole .005

[Unbalanced]

0 deck height

[Unbalanced]

Stock Compression

While this is what the calculator states, I have never run into compression this low on a gauge.   Typically it has been 208 - 220 for the bikes I have owned.

[North Star]

So it should be 9.5:1 or thereabouts?

[HILLSIDECYCLE.COM]

If the heads are off, and on an average,(cc'ing is really the only way to know) if .030" is removed from the head, with the use of the .030" gasket, you are in the catbird-seat for the use of an S&S .570 cam set.
HUGE gain for the dollar.
Scott

[GMR-PERFORMANCE]

The CCP number is due to the cam.. That program thinks that the numbers you plug in are 100% true. The numbers you have to use are a snap shot of the 255 cam. 210 ccp is a avg number.. the CVO heads will range 93-97 cc chamber volume..

 Again Scott "says"  the 570 is the way to go.. So scott  again lets see some proof as to how this cam works. Going on a year now you keep posting how great it is and how many you have built I would think you have built at least 3+ with that cam so post it up..   Or use a bolt in cam that will make more power than the 570 and never take the heads off,,  that is an option as well but that might be too easy.. ha ha

[HD Street Performance]

On a 110 with heads that were not milled what would the compression ratio be with just the .030 head gaskets?

Too darn high to use a stock cam any more

[North Star]

On a 110 with heads that were not milled what would the compression ratio be with just the .030 head gaskets?

Too darn high to use a stock cam any more

Good, because I'm installing a TTS 100 cam.

My engine already has headwork done, but I don't know the details/numbers. I believe he cleaned them up and smoothed out the rough edges kind of thing.

[HD Street Performance]

Good, because I'm installing a TTS 100 cam.

My engine already has head work done, but I don't know the details/numbers. I believe he cleaned them up and smoothed out the rough edges kind of thing.

Whomever did the head work should supply the chamber CCs for a calculation. When the seats and valves are ground the volume grows. The TTS 100 cam is very close to the SE255 timing. I would not expect to see any significant difference in cylinder pressure and the same caution regarding compression applies still. Take a compression test with the ACRs disconnected for clarity.

[North Star]

As far as compression, the builder told me he re-degreed the stock 255 cam - 4 degrees then added the .030 head gaskets which meant the compression remained at the stock compression. The "package" of modifications he did was designed to work with a stock compression engine.

I'm taking the 255 cam out and replacing it with the TTS 100. I'm changing out the re-degreed cam sprocket and putting the stock one back on. Therefore my compression will be more now.

Other than changing the cam, lifters, pushrods, oil pump, and Fullsac DX headpipe, no other changes are being done to the engine.

Steve Cole says his cams work best at below 10.1:1. The reason I posted this was to try and figure out what my compression will now be. From everyone's input, I suspect it's around 9.5:1, or under 10:1 regardless.

If the compression would be higher than that, I would have rather of went with the GMR 577 or Kuryakyn 24D which were my other choices. In the end, I went with the TTS 100 because I think those cams would work best with over 10:1.

[North Star]

As far as compression, the builder told me he re-degreed the stock 255 cam - 4 degrees then added the .030 head gaskets which meant the compression remained at the stock compression. The "package" of modifications he did was designed to work with a stock compression engine.

I'm taking the 255 cam out and replacing it with the TTS 100. I'm changing out the re-degreed cam sprocket and putting the stock one back on. Therefore my compression will be more now.

Other than changing the cam, lifters, pushrods, oil pump, and Fullsac DX headpipe, no other changes are being done to the engine as the heads are not coming off.

Steve Cole says his cams work best at below 10.1:1. The reason I posted this was to try and figure out what my compression will now with just the thinner head gaskets. From everyone's input, I suspect it's around 9.5:1, or under 10:1 regardless.

If my compression is now higher than that, I would have rather of went with the GMR 577 or Kuryakyn 24D which were my other choices. In the end, I went with the TTS 100 since my compression is at under 10:1, and I think the 577 and 24D work best with compression over 10:1.

[HD Street Performance]

Without exact numbers such as how far the pistons are in the hole and the actual chamber volume after machine work no way to know for sure what the static compression is. Checking the compression, as I suggested, is a way to get a ballpark. A stock 110 cranks 210-215 psi. Retarding the cam would lower that a few.

[mike jesse]

The 3 110 engines that I have opened up all had the piston down at least .008 in. One was .013 in. down.
Same for the head chamber volume. Until you actually take the time to measure up the unknowns, you are guessing.

[HD Street Performance]

My 13 was .004 f .006 r
So there you go case and point, fluid test and measure for accuracy.