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[HD Street Performance]

I know but another chimed in and tried to box the 600sm as the right grind for a 103. I knew your goals and requirements not his.

This cam choice is not about good brand or good cam!
It is about holistic choices that fit the goals of the rider and combination of parts the motor presents. A 103, 110, and 117" are different for other reasons than just displacement. Everything needs to be matched for good performance. The cam can come from one of a dozen of brands but most are ground by Andrews except S&S. Quality is good on all of them. The exhaust system is a vital part as soon as a cam now has overlap to add to the party.

Overwrenching is your enemy. Skip the hype and leave your tensioners and OP / cam chest alone.
Be diligent and go after the weak link LIFTERS.

[Mr D]

I know but another chimed in and tried to box the 600sm as the right grind for a 103. I knew your goals and requirements not his.

This cam choice is not about good brand or good cam!
It is about holistic choices that fit the goals of the rider and combination of parts the motor presents. A 103, 110, and 117" are different for other reasons than just displacement. Everything needs to be matched for good performance. The cam can come from one of a dozen of brands but most are ground by Andrews except S&S. Quality is good on all of them. The exhaust system is a vital part as soon as a cam now has overlap to add to the party.

Overwrenching is your enemy. Skip the hype and leave your tensioners and OP / cam chest alone.
Be diligent and go after the weak link LIFTERS.

My apology

Thread hijack was not the intent

[Lars]

I know but another chimed in and tried to box the 600sm as the right grind for a 103. I knew your goals and requirements not his.

This cam choice is not about good brand or good cam!
It is about holistic choices that fit the goals of the rider and combination of parts the motor presents. A 103, 110, and 117" are different for other reasons than just displacement. Everything needs to be matched for good performance. The cam can come from one of a dozen of brands but most are ground by Andrews except S&S. Quality is good on all of them. The exhaust system is a vital part as soon as a cam now has overlap to add to the party.

Overwrenching is your enemy. Skip the hype and leave your tensioners and OP / cam chest alone.
Be diligent and go after the weak link LIFTERS.

Taking a stock 2013 SEUC and doing the 117 upgrade with the parts you suggest, what kind of cost would I be looking at. I'm not a really hard rider but I like to roll on it occasionally. I have 45k on the engine now.

[jsfenster110]

HD Street Performance, thanks again.  I have replaced the faulty lifters but I had heard the tensioners were weak.

One final question; what if instead of the 117 kit as the ultimate goal I just add the tman 600 and some 10:1 110 pistons?  How would that change both the power and the enhancements to drivability?  Would power come on harder lower or higher or maybe both with the added compression?

Thank you

[HD Street Performance]

Taking a stock 2013 SEUC and doing the 117 upgrade with the parts you suggest, what kind of cost would I be looking at. I'm not a really hard rider but I like to roll on it occasionally. I have 45k on the engine now.

The cylinder kits are available from HD and cams from Tman. Check their pricing.
I am out unless there is head work involved. This is for the guy looking for 130+ hp and still a very respectable torque curve that comes on hard and early.

[HD Street Performance]

HD Street Performance, thanks again.  I have replaced the faulty lifters but I had heard the tensioners were weak.

One final question; what if instead of the 117 kit as the ultimate goal I just add the tman 600 and some 10:1 110 pistons?  How would that change both the power and the enhancements to drivability?  Would power come on harder lower or higher or maybe both with the added compression?

Thank you

Truth be told by a non-sales person the stock tensioners are lasting quite well, equal or better to the aftermarket versions. Lots of sales hype that looks convincing but there are better ways to spend the money and get reliable power from these motors with a stock cam chest. You addressed the lifters but that is a maintenance item still and at the same time the tensioners should be a check item. The anti-rotational pins need to be properly sized. The crank, at least checked for run out, better yet pinned and trued and rod bearings checked, rods sized. Heads a blueprint, Serdi valve job, bronze manganese guides, lower pressure beehive springs (less stress on lifters). Use good gaskets including Cometic .030 head and HD base gaskets if going to 117. This is the real meat and potatoes behind keeping these motors running for the longer haul.

10:1 is what the stock 117 drop on kit will yield with a .030 head gasket no need for any special pistons. Stock Mahle pistons, good parts. With the 600sm this will be a very strong torque package. Want more then porting and other things come into play.

[jsfenster110]

HD Perf...huge help thanks.
So, who makes the 110 pistons if I go bigger compression.
You mention Harley?

I assume this will benefit the sm 600s.  I think for a solo rider this is plenty.
I know, once I ride for a while, I may want more.

Thanks again.

[HD Street Performance]

I sell CP, Mahle, and Diamond Racing pistons but stock pistons in the kit is the limit I would run at 117" with that cam.
More cam, more compression, head work, larger throttle body and injectors and a new window opens.

[jsfenster110]

HD Performance,

What should labor be for cam and piston install?

[HD Street Performance]

I don't know, maybe one of the dealer techs can advise.
I work on motors out of the chassis.

[jsfenster110]

Ok. Thx!