why?



for what that would cost you could build a health 95Ci.

and have well over 100 hp if taken to the right engine builder

 

Yes. Heads,cams,valves,bigger pistons,air cleaner,pipes,jets,dyno work. It's not cheap.

 

How do you use bigger pistons and still be 88 c.i. ??

 

change your cams,,, something around a .510 to .550 lift with a mild open and close timing.. raise your compression.. 10.1 to 1 or very close to it..
K&N airfilter.. and decent exhaust.. maybe an SE slip-on muffler or something similar..
you do not have to "big bore" the motor if you dont want to but it sure helps with the power..

your biggest power/torque gain is from the compression then cams..
and neither will work if you dont give the motor the air to breath...

 

72.5 hp and 91.8 lb-tq

Yes,I have a 2002 FLHTCUI and I pulled 72.5 hp and 91.8 lb-tq. Current set up. YB12S cam from Yuill Bros. 236 duration on intake, Intake valve closing @ 36 degrees with .510 lift, S&S gear drive, Andrews adjustable push rods, Fueling cam plate, Fueling high volume oil pump. Porker Performance true dual headers, D&D 3-1/2" slash cut slip-ons, Screamin Eagle aircleaner assembly, Screamin Eagle Stage 1 Flash down load to ECM. Power Commander USB III with custom fuel map and dyno tune. Everything else in the top end is completely stock. All parts were new and I got everything at a discount price. Just keep your eyes open for a good deal. E-bay is a good place to start.

 

You really need to run dome pistons, or else you can't get the comp up high enough to get that kind of power, so it is a bigger(taller) piston. getting 1 hp per ci or 1ft lb torque is doable, even more so with a stroker engine. a larger bore piston allows for more HP. i believe that Steve from Fulsak had an 88" motor that had more than 90 ft lbs torque and 90 HP. He used andrews 37 cams, ported heads and a tricked out tb with his duals and muffs.

 

I know you hate it when folks don't really answer your question, but..... I got 79.3hp w/87.2 lbs torgue out of my 2001 '88 FXST using: Andrews 37wb cams, SE air cleaner, Python II exhausts w/Big City Thunder monster baffels and a good dyno tune and carb jetting of the stock CV. Runs good for me, but if you like to hear yourself think stear clear of the BCT baffels.