How and whom and where is it possible to get 120 hp & over 115 tq from a 103 ? I'm getting 113 tq & 96hp now from a103 with 211 cams . I being promised those above numbers by a little boring for larger Pistons & some head work to achieve this (no bottom end work). That seems to be a lot of horse power & torque for a 103. Is there anyone out there hearing or have a setup to get them?
Thanks

 

By a little boring I would assume going to 107 cubic inches, with some decent head work exhaust and tuning this should be reachable, of course the dyno you measure it on may make or break whether you make the numbers or not.

 

Talk to Scott at Hillside Performance, I'm sure he can fix you right up.

 

That's the only way I see when I'm told ( some boring ,larger Pistons),but then it would not be a103 like you said. It would have to be 106 or 107, I'm thinking.

 

Forced induction.....

 

You definitely wouldn't be a 103. Those numbers + are defiantly realistic with boring your cylinders and w/o a doubt headwork, finally finishing off with a new set of cams.

 

Don't need to go 107" or a blower. Just a well thought out 103". And you aren't gonna do it with some mail ordered kit with downloaded map or using an "autotune" .

 

what are you planning on doing with the bike when its done? be careful what you hear on the internet.a 120+hp 103" would not be a very good motor as far as touring or longevity.a 107" could get you close,but would still have to be a high compression fairly aggresivly built motor to get you to 120+.if your looking for a very reliable,long distance build that will easily do 120+/130+,look into either going 117" or 124" and build them on the mild side

 

Yes very aware of that, thanks.

 

no kit, shop know for building high output motors(a few within my circle),but they don't share like on here. Their bikes fly,just not sure if what (they) telling me is all true..