Which is better for a 103 upgrade? (MCR Performance heads,flat top pistons, 258 cam?

 

If your going that far with the upgrades I would stick with the SERT, its a bit more flexabe in itstuning capacity.

 

On the flip side of that, if you find a good turner for the power commander who can put your bike on a dyno, it can be just as good. Im happy with my pc3 so far, and plan on keeping it when i do start diggin in the motor.

 

the problem with the harley tuner is that if you want to go with pipes other than HD pipes it doesnt have maps for any thing elts. i am going with the power comander so i cango with samson pipes and other mods later on

 

I just went through the 103 upgrade on my 07 FXSTC and went with the SERT. I have the BSS pipes. I made sure that the dealer included dyno time in the deal after the break-in period. I couldn't be happier...it runs like a scolded dog, completely different bike. Good luck with yours!

 

Either Tuner requires a dyno for optimum performance. I would go with a Closed loop system suchas the Daytona or the Thundermax. THe extra cost now will save you Dyno dollars later.

 

The race tuner WORK'S with any engine mods and pipes.

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I've gotta a pc3, but I've heard good things about thundermax

 

Agreed ... I have a annoying decel pop with my Bassani true duals and even had my race tuner dynoed.

 

Flip a coin

HEADS - RACE TUNER
TAILS - RACE TUNER

This way you will be sure you made the right choice.