HarleyTechTalk

Thanks to all who helped throughout my "help needed with problems after 95" build" thread.

After redoing the top end again the bike now runs extremely well, and I'm really happy with the results. I wasn't sure I liked the S&S 570 cams at first, especially with 10.5 compression, but after sorting out the carb properly and adjusting the initial and adv timing settings, the bike pulls hard and rides smooth.

I think I hit every possible bump along the way, but got there in the end and aside from pressing in the crank and installing the timken bearing, all the work - including splitting the cases was done by myself and my old man in our home garage. It was a very good learning experience.

Thanks for all the advice and help. Cheers, and ride safe. 

2002 Fatboy
95" build
KB +0.040" domed pistons
OEM 2009 heads at 83cc
10.5 comp with S&S 570 cams
Fueling HP+ lifters
DTT ignition
No dyno results yet.

Glad to hear your up and happy! This site is the standard when it comes to knowledge and correct information instead of opinions. There is nothing more satisfying than building your own engine, hitting the throttle and feeling the adrenaline and dopamine. Ride safe.

Congratulations, you fought through some major frustration with that project, well done!

Out of curiosity, what are your ignition settings ?
Thanks

 

Hi Adam and congratulations to having completed your project. You finally made it without getting derailed plus your learning harvested knowldge you'll never lose. This is a great place and it was my Harley academy when I ventured into my 95/98 project from scratch. Enjoy the ride!!!

Armin.

Quote from: CarlosGGodfrog on July 18, 2022, 08:52:22 AMOut of curiosity, what are your ignition settings ?
Thanks

Good question, I started at 2/2 as per DTT instruction manual for suggested setting for high compression motors (I'm at 10.5  200ccp). But it was a little sluggish, so I went to 3/5... not much better.... Then tried 5/7 and got much better throttle response.

I was sure with that much timing I would get detonation, but I can't feel or hear it (but that doesn't mean it's not happening, right?).

If you have any other suggestions on how to find the right initial and adv timing settings, I'm all ears.
Thanks

I have a Crane HI 4 on a 2000 Heritage Springer. MVA heads, 10.2 compression, and S&S 570 cams. I use 5/5 for the Crane settings.

    Congrats on the completion of your build. I have the 570's in my 99 ninety-eight inch FLHR and like them a lot. What are you using for a pipe? A decent 2-into-1 seems to compliment them well.  Bill

custom map
 with dtt
200 ccp no ping

Glad you got it.
I have seen the S&S .570 shine in TC's from 88" to 117" all on this forum and others, including a couple friends. If Roland hadn't come out with the 24D, I would have a .570 in my 110".

Quote from: Adam76 on July 15, 2022, 09:46:47 PMThanks to all who helped throughout my "help needed with problems after 95" build" thread.

After redoing the top end again the bike now runs extremely well, and I'm really happy with the results. I wasn't sure I liked the S&S 570 cams at first, especially with 10.5 compression, but after sorting out the carb properly and adjusting the initial and adv timing settings, the bike pulls hard and rides smooth.

I think I hit every possible bump along the way, but got there in the end and aside from pressing in the crank and installing the timken bearing, all the work - including splitting the cases was done by myself and my old man in our home garage. It was a very good learning experience.

Thanks for all the advice and help. Cheers, and ride safe. 

2002 Fatboy
95" build
KB +0.040" domed pistons
OEM 2009 heads at 83cc
10.5 comp with S&S 570 cams
Fueling HP+ lifters
DTT ignition
No dyno results yet.

I also have an 02 Fatboy and trying to decide what big bore kit to go with, S&S 100 possibly or just do 509 cam. Why did you decide to go with the s&s 570 cam over a 509 or 510?

Just bore your cylinders to 95 or 98 and put the money saved into head work 

Quote from: Lone Ranger on September 10, 2022, 12:26:46 PM

Quote from: Adam76 on July 15, 2022, 09:46:47 PMThanks to all who helped throughout my "help needed with problems after 95" build" thread.

After redoing the top end again the bike now runs extremely well, and I'm really happy with the results. I wasn't sure I liked the S&S 570 cams at first, especially with 10.5 compression, but after sorting out the carb properly and adjusting the initial and adv timing settings, the bike pulls hard and rides smooth.

I think I hit every possible bump along the way, but got there in the end and aside from pressing in the crank and installing the timken bearing, all the work - including splitting the cases was done by myself and my old man in our home garage. It was a very good learning experience.

Thanks for all the advice and help. Cheers, and ride safe. 

2002 Fatboy
95" build
KB +0.040" domed pistons
OEM 2009 heads at 83cc
10.5 comp with S&S 570 cams
Fueling HP+ lifters
DTT ignition
No dyno results yet.

I also have an 02 Fatboy and trying to decide what big bore kit to go with, S&S 100 possibly or just do 509 cam. Why did you decide to go with the s&s 570 cam over a 509 or 510?

As you're adding cubic inches you're creating more airflow. At the end of the day the motor is an air pump. The more efficient the pump the more power you create. As you move more air the camshaft needs to "lift" the valves off the valve seat higher so there's not a bottle neck. The S&S 510 lift is .510 inches and the 570 is .570 inches the other specs are similar but your gaining.060 "lift" so more air can flow in and out of the motor.

Hopefully this makes sense.

I just realized I didn't address the 509. The 509 is designed more for stock compression motors and doesn't have as much overlap and duration as the 510 or 570. In a lower compression motor the 509 will make more of its power from say idle to 4000 or 4500 rpm (just an example not exact numbers) where the 510 and 570 will feel a little soft in the lower rpm range up until say 2500-3000 rpm ( again not exact numbers just an example). 
So if you're just looking to upgrade your cam and nothing else right now the 509 is a great choice because it "makes" power right where you use it. If you're going to add compression and cubic inches the 510 or 570 become better choices.