| Author | Message | ||
     Tombo |
With a couple of Buells in the garage the dyna never felt all that responsive so this winter the big twin received some attention, including heads, 58m TB, injectors and a bigger bore. Results are over 100hp and 118 ft lbs of torque. It feels very responsive, like pulling a 350 small block and replacing it with a 454. Still running fairly mild cams (SE204) and a cat. While it revs slower than my Buells it now pulls just as hard. If you are looking at pumping up your twin cam, I believe the SE heads were a big part of the improvement. | ||
| Zac4mac |
If you got the SE CNC-ported heads you got their best. I believe S&S does the porting for HD and it so good a job, I can only pull a few more ponies out with all my tricks. Much better than ANY other CNC heads I've seen, almost as good as MY work. Z | ||
| Ratbuell |
I will say that cams will bring the heads to life. Pick your RPM band...and enjoy. | ||
| Tootal |
What year? What size? The 204's are much better than the 203's for torque, good choice as long as you're running flat top pistons. Did they give you any specs on what the SE's are flowing? | ||
| Tombo |
Good to know Zac, debated different options and settled on the SE CNC heads. It is a 2013 with what was a 103 and is now a 107. Increased the displacement by using an S&S kit with CP pistons. | ||
| Tootal |
CP pistons? What compression ratio we talking? | ||
| Tootal |
Zac, my local engine builder and friend ported my stock 2002 heads and got me 256 cfm at 1/2" lift. He doesn't have the machines but owns the program. With Andrews 21g cams at 9.3/1 compression it's pulling 108 ft/lbs of torque with 95 CI's at the rear tire. Nothing wrong with small cams when you want a torque monster at low rpm!  | ||
| Zac4mac |
I'm now learning the interplay on the stuff I do. Used to be Dan told me and I did... Sounds like you got a good build with a Stg2 headwork. What valve size did you wind up with? The 2 SE sets I did, one was an inch 9(1.900 in x 1.615ex - stg2), the other was 1.940in x 1.625ex, a stg3. | ||
| Natexlh1000 |
What are the cool kids doing nowadays to make the cam bearings and chain tensioners not explode? | ||
| Tootal |
I'm assuming that question was for me in which case he put in the stg 2 valves. Mine is an 02 so I have a good crank that I took to Darkhorse and let John and the boys rebuild, balance and weld. I run gear drive cams on a stock cam plate that I blueprinted. It's very quiet, you'd never know it's gear drive. Anything after 2002 you have to check run out on the crank and most of them would not allow gear drive so you're stuck with chain drive with hydraulic tensioners. Even the new 8 valve motor is chain driven. | ||
| Odd |
they are running a different chain tensioner suppose to be better | ||
| Zac4mac |
The SE hydraulic cam plate and oil pump kit is a real good value. The hydraulics maintain a consistent tension whereas the spring loaded tensioners lose force as they wear. At NRHS, for options, Dan preferred gear-drive; I leaned towards the hydraulic SE kit. Bottom line, keep this a regular inspection item if you run a Twinkey.... |
