I'd like to hear some thoughts on a planned build for my 2000 FXDX, and would appreciate some input.
Looking at 95 SE cast 10.25 pistons, maybe a light clean up of the heads, and either Woods TW-6g, Andrews 31/37G or the Kuryakyn TC2-g ?
Hoping to keep the CV Carb with jetting, running SE heavy breather, and slip ons at this stage, and will fit a Twintec.
The issue I see is the TW-6 and 37G give me corrected compression around 9.5 and 200psi cold. Dont really want to fit MCR's. I could always mill the tops of the pistons slightly to drop compression .
I'm looking for a strong 2200 to 5500 band, maybe 90/90 would be nice. Cheers.
As an impulse buy, I've already got the 95 SE cast 10.25's coming, so I guess I need to decide on a cam/head combo.
I'm leaning towards the TW6 at this stage, just unsure about corrected compression, but if I fit MCR's I think it will be OK.
Obviously the heads wont be as good as yours FYO, but if I can get somewhere close to you, I'll be happy.
Hi Speedszter, a m8 in Tenn USA did the andrews 37's with a 95inch twinky a long time back he got TR (T Man ) to do his heads, i think he was the guy found T Man now he is well known in the Harley performance world, my mate ran the comp your planning made good HP for those cams and bulk Torque but was experiencing detonation ( have to remember TC's use a longer rod than the EVo's so piston stays up top longer. they also have better fuel ( gas ) than we get but they measure octain at the pump so number looks lower. my mate went to the Woods 6H he liked it but he dropped hi comp down so never got same HP or TQ just said TQ came on quicker, but the H was noisy the 6 would be quiter. i think if you do have 10.25 cranking would be over 200, but i use 3.37 ratio and i would recomend you use that gear ratio too makes life easier on motor.
cheers mate
Krash, thanks for the info. I would probably be happier running 10:1 with the TW6 by milling around 4cc of the pistons to give me around 10:1 stattic
and 9.15 cranking @ 190psi. Would the TW6H move the power band higher up, or just fatten whats there ?
cheers
hi speedster, my friend said the woods 6HG seemed to have torque intantly, he is a big guy, i think the wood 6 is the same with less lift, i would expect the lower lift would make it a bit quiter.
would depend on what you want from your bike and how and were you ride it. but sounds like a good combination to me for quick torque and fun.
hi. could be & idea to check piston crown thickness 1st before milling as too not weaken the crown, could look @ modifying combustion chamber in stead, it depends what the pistons look like esp if your going to use a cam thats close to pinking with that compresion , 10 to1 or 10.25 to1 ain't a real big differance may be look @ a differant cam with a latter lobe centre on the inlet , cheers
D R , I was thinking about that. I was set on the Wood cam, but due to wanting to go gear drive, the cost blows out with Wood.
At the moment I'm leaning towards Andrews 31/32g. about 9.2 CCR @ 190psi
Krash, yep good points. I want to do it once and do it right. And I don't want to re invent the wheel, hence all the questions..
I'm down South in Ballarat. Cheers
hey good m8, the right aproach. i have talked to Mike Roland that designed the wild thing cams, i like his outlook and his idea's. he never try's to sell you anything he seems to be very truthful. but i have never used his cam's, i was thinking about useing one of his cams but he said give him a flow chart of my heads also asked what comp and swish. but i have my bike how i want it now, it has the speed i want. you might be able to contact Mike like i did and ask what he thinks.
Jack, thanks for the info. Did you mill the heads for any more compression, as the SE211 looks like it would like a bit more ?
My build is looking like this so far:
Lightly ported '09 heads by Paul Hallam, 95 10.25:1 SE pistons, TW31 cam.
Another build I'm doing is a 103 Fatbob, Hallam ported heads, SE flat tops and Wood TW-7H cam.
Should be a fun winter !
I picked up a set of heads off the internet that came off an 04 and had about 1500 miles on them for 150.00US. They were in perfect shape so I just put them on the bike. The 9.4:1 compression is all I wanted so I could keep everything dependable and not have to run compression releases. The problem I see with the higher compression is the need for hi octane gas, which I always run when I can. Some places only have the mid grade and this could cause pinging in the hi compression engines. Like I said, I wanted dependability and longevity so I can go anywhere and not have to worry about breakdowns, and it still hauls ass, I can lift the front wheel when I power shift into second, which is plenty of poop for a 62 year old fart like me, and, besides, if I had a rocket like a Hyabusa, I'd probably just kill myself. I raced for years and when you've got max horsepower you tend to see just how fast it will go and at my age that could turn out ugly. Unless you just have to have a bullet, I think you'd be happy with the set-up I have and the knowledge that it will stay together between your legs for a long time. I've been thinking of sending out my old heads and have them ported by some top engine shop then copying them in my shop and then undercut their price and switch my shop over from cars to Harley engine mods. It's easier and there is more money and less headaches in it-----jack
Great weather for engine building here in Ballarat, so while waiting for the Heads and Cylinders to come back from Paul Hallam, I thought I'd pull the bike down, fit the Cams, and replace the inner cam bearings. The inner Cam bearings were very easy to remove and replace using the correct George's tools.
To my surprise, once I removed the bearing retainer from the cam plate, the cams with bearings basically fell out without using a press (or oven as I had planned !) There was evidence of the ball bearings spinning in the cam plate, as the bearing retainer had a nice circular groove cut in it !
I pressed the new ball bearing on the front cam after heating the bearing on the electric hotplate, fitted a new rear tensioner then placed the cam plate in the oven . After removing the hot Cam plate, I then fitted the new rear cam roller bearing using Loctite 243, then fitted the cams with chain into the plate, along with Loctite for the front ball bearing.
The outer cam tensioner showed minmal wear, and the inner just a little more. Would have been good for another 30,000 K's !
There was also some interesting polished wear marks in the cylinders at the head studs and the drain holes. I'm guessing the cylinders were not correctly bored from the factory ?? The engine had done 30,000 kms, and looked good apart from this.
Now just waiting on the Heads and Cylinders !
Spoke to Paul Hallam this morning. The ported heads came out 86 cc's, and the SE pistons are 8 cc's.
Puts me bang on where I want to be at 10.2:1 stattic with .030 HG, assuming zero deck.
Oz, yep no milling of cast pistons. I've gone with Andrews TW31, so it likes a bit of compression. That was just an idea (bad) early on in my research. I've also gone with Comp release's now, just incase !
Got the parts from Paul Friday night, I must say I have a lot of respect for how thorough that guy is in his work.
The difference between the old 2000 heads and the ported 2009 heads is amazing.
Finally got my bike fired up in anger tonight, and have done a few heat cycles.
Fuck, does this thing sound crisp ! To busy working to take any more build photo's damn it !!
Another cold/wet weekend, another build. This time it's the 103 Fatbob's turn !
Won't be able to to start her up until we get the bodywork back from our painter mate Trev' (AKA Dennis !)
