I am hoping that a 10.25 CR 95 Inch Piston Kit along with maybe a Mikuni HSR42 and possibly a new Intake Manifold will make about 92-94 HP at the wheel.

Question..... for the engine gurus. What is the limiting factor on flow on the Twincam engine? The heads or the Intake Manifold? I ask because I wonder if a bigger Intake Manifold along with a Larger Carb is beneficial on a mild cammed 95 incher.

 

It's the heads. But they don't need much work. The key to a torque monster like a harley is velocity, not volume. There are plenty of guys that will do a good street port for cheap. There is one guy who advertises on another forum that is well known and does it for $350. I won't say it but I can pm it to you. I'm not sure if we have any sponsors on here that will do the same. You can probably get 95+ hp with the stock intake and carb, but if done right, you can get over 100 lbs.ft also. I would guess that the carb would be the first thing to change after the headwork. I would also assume that you change the springs when you do the heads. You can easily go over 100hp at the wheels then. Smaller displacement engines can match a larger for overall hp, but its the torque where you will lose out. This is where that velocity over volume helps out. I'm one of the believers that a good port on the older 88" head will work better than a ported newer head. Others don't and I know they have their reasons. I think the newer head does not have much room for a good porter to shape it the way he wants. They increased flow, but focused on EPA standards, not performance. That's my 2 cents.

 

Chicago Ken with a stock 96" and stock heads you cant go wrong with thw Andrews 48H. It was made to work best with stock heads. If you do a net search on the 48H you will see HP numbers in the high 80's and TQ numbers over a 100 at 2500 to 3000. I have them and can tell you they make very good power down low. My brother has the 54H cams in his 105" engine with ported heads and it did not dyno a lot better than what I have seen posted on the 48H. If you just want a bolt in cam the 48H is it.

 

I have a 02 FXDL. I went with Andrews 26 gear drive set about 2-3 years ago. I was looking for just a little more "umph" will cruising up & down I-75 and needed something extra to pass all the gravel haulers around here. While I was in there, I also replaced the pushrods with a set of adjustables (this makes disassembly/reassembly much easier), Fueling lifters, oil pump and cam plate just to be sure everything was getting proper oil.

Performance (acceleration) is improved, fuel economy dropped a little, maybe 3-4 mpg, but that might be because I can get a little throttle happy with the improved performance. It may also be because I had to fatten up the jets a little, which will cool the exhaust temps some.

It also has a Arlen Ness Big Sucker A/C, SE slash cut pipes, Progessive 440's in the rear and, Progressive fork springs with Race Tech emulators up front.

That's all I know for now...
Steve in Flat Rock, MI

 

happy with S&S 551

 

SE204's are REALLY under-rated. Stock 96 dyno'ed @ 90HP/98TQ - not too hard on the motor/bike parts, but hella fun to twist the throttle! Comes on around 2.3K up to 6K. Big advantage you just do cams - nothing else. Good bang for the $$. IMHO

 

Check out the Woods TW555 cam.

 

I am putting a set of S&S 510's with gear drive next week. I already have a 2:1 thunderheader. thundermax and a stage 1 aircleaner. I will let you know how much it changes the bike.

 

New cams are in and I have a big smile on my face. The boost in torque and power from the addition of the cams felt as great as the boost in power I got from adding exhaust, intake and a thundermax. I had considered a rebuild to; not any more.

 

Ive read some good things about Woods cams. TW777 is interesting in that it pulls hard from 3-6k rpm range. My guestimation would be that short of reworking heads and upping compression, there isn't a whole lot of power to be found unless you can get more useable power at higher rpm levels.