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[SE113]

I have a 2011 SESG 110 motor with Tman SM600 cam a great cam with a nice TQ curve i have 9.9 compression.   My dyno sheet with the 600 cam Is 107/114.  I still feel like the SE 255  had a lot quicker throttle response with stock comp even with lower dyno #  it seem like it pulled harder to about 4000 rpm quicker that the 600 cam does,    The 600 cam will keep pulling on up in the rpm range.    Im thinking about changing back to the 255 cam to get that quicker throttle response,   My heads are at 9.9 comp now i think the 255 cams will be better in the upper rpm range.   
  What makes the 255 cam show low dyno number but feels so much better seat of the pants feel than other Cams

[Unbalanced]

Somethings you might consider on the calculators is you were at 215-220 cranking before you put in the .030 headgasket and any milling that might have been done on the heads.    Do you know what the CC's of the heads are?  Are you using the stock flat top pistons?   are the pistons in the hole if so how much?

You may just have too much compression to consider going back to the 255's.  Only real way to sorta check is running it through the calculators and see what you come up with, but you will need the info above.

Might be easier to find another cam with stump pulling power.   Something else to consider is quick closing intake generally equals noisey on the top end.

[SE113]

 The heads are 93cc  .60 milled of heads  stock pistons using  .30 head gasket

[Para Bellum]

You may just have too much compression to consider going back to the 255's.

I'm trying to decrease my ignorance by asking questions.  How much compression is too much for the 255s?  Why is higher compression bad for, or with, the 255s? 

[HILLSIDECYCLE.COM]

He's there.
9.9 cr?
An S&S .570 would smack pretty darn hard, and carry as well.
Scott

[justaguy]

I milled 0.050" off of a set of CVO 110 heads and with a 0.030" gasket they wistled at 10.5:1 CR. Are you sure you're only at 9.9 with 0.060" off the heads?

[DCFIREMANN]

He's there.
9.9 cr?
An S&S .570 would smack pretty darn hard, and carry as well.Scott

I have to agree with Scott!!!! The 570 is a great dresser cam!!!!

Be Safe

THE DAWG

[prodrag1320]

agree here too

[Doc 1]

I have a 2011 SESG 110 motor with Man SM600 cam a great cam with a nice TQ curve i have 9.9 compression.   My dyno sheet with the 600 cam Is 107/114.  I still feel like the SE 255  had a lot quicker throttle response with stock comp even with lower dyno #  it seem like it pulled harder to about 4000 rpm quicker that the 600 cam does,    The 600 cam will keep pulling on up in the rpm range.    I'm thinking about changing back to the 255 cam to get that quicker throttle response,   My heads are at 9.9 comp now i think the 255 cams will be better in the upper rpm range.    
  What makes the 255 cam show low dyno number but feels so much better seat of the pants feel than other Cams

You are correct, there is NO other cam on the market that delivers the low end torque like the 255's....NONE....and when you change them trying to get more ponies at 6000 rpm you will loose 10 to 15 ft lbs of tq at 2500 rpm. That is your riding area and that's where you are feeling the loss of tq and throttle response.
The 255 cams make high cylinder pressure of the line and that's how they get all the tq in the lower rpm range, however this causes two problems. You will suffer top end pull and the high cylinder pressures produce higher temps.
If you got some good head work done to your 110'' and used the 255's the tq would carry to the right some....ie...instead of the tq falling of quickly at 3800/4000 rpm with stock heads it will carry to the right to about 5000 rpm with GOOD head work. If the tq carries to the right the hp will have to meet the tq at 5252 rpm so you will see a huge gain in hp also. The last one I seen had 105/122 and STILL had the great low end tq of 105 at 2200 rpm.
Now HARRY might be right....with the .030 gasket you might have too much compression for the 255's and this will add to the heat problem they generate. I haven't looked at the math but if you are 9.8 or 9.9 I think you are fine for the 255's to go back in.
Doc

[Unbalanced]

If SE113 isnt happy with the 600 and a 20 close, than he will most likely not like the 570 either.

[HILLSIDECYCLE.COM]

Guess I'm wrong again..............

[DCFIREMANN]

If SE113 isnt happy with the 600 and a 20 close, than he will most likely not like the 570 either.

Harry I wish I had a dyno sheet for the 570's. I have put them into a few dressers and they have some good stump pulling power down low.But none of them were 110's. I guess it comes to the point if he is not going to be happy with the TM600's or the S&S570's then how fast does he want to spend!!!!!

Be Safe

THE DAWG

[cvo1717]

everybody who mills "X" amount off ther heads also has to grind valve reliefs in the stock pistion or does it depend on the cam?

[Unbalanced]

The ones I had done didnt have .060 taken off the heads only .040 and the porter put reliefs in.   Don't knwo if there is a fast / set rule on it, I think it depends on the cam and its specs and valve to piston clearance a long with headgasket thickness.  why most guys clay them out to be sure with the headgasket you have enough room.

[HD Street Performance]

The 110 with SE255 cams cranks 210+ with the compression releases disconnected. The calculators will have them at the high 180s with 9.3/1 compression which is what they figure with the stock head gasket. Go up from there??? I think not.
They fall hard and fast (get soggy down low) with added overlap unless compression is added and the pipe and tune are right on.
I look for different cams that work well in the 110 VS the common choices made for the OEM headed motors. They respond better that way and have less tendency to drop off down low.