90+ hp/tq build
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Joined: Aug 2008
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From: Ohio
Be careful, your on the edge with a 42 degree intake closing cam with that compression plus starter kickback, don't let your ***** overtake your brain - it's the same thought pattern that allows a women to take over your life.
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From: Lafayette, Louisiana
Once you set the deck height and get a precise measurement of how much higher or lower your piston is above the cylinder, not only can you select the correct head gasket, you can also determine if you can mill a little off the heads and if so, how much.
I would not plan on using pistons that raise your compression to the max, because that decreases the flexibility you have with other components. Of the three you listed, I would go with the 9.5. Have a look at Wiseco pistons as they make a good product with a wide selection.
The big boys calculator will also allow you to account for the larger bore, which also affects compression.
There are so many factors here that it takes a lot of time researching before the first bolt is turned and parts should be bought as needed after taking measurements, not in advance. The more power you want to make, the more critical this becomes, not only to get maximum output, but also to get reliability. What good is 100 hp on the street if it grenades on the first road trip?
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From: Lincoln ne
If I have to I will just go with the lower compression kb's. I don't want to go with anything else. I don't always let my bike warm up like it should (I know, it makes base gaskets seep to...) and I don't want to scuff my cylinders. I've been told by multiple people that the wiseco pistons will do that easily if not properly warmed when you get after it.
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From: Lafayette, Louisiana
Read up on the difference between cast and forged pistons. That is where the difference in thermal expansion properties lie. Silicon content also plays a role.
There is so much false information and rumors out there it is unreal.
I don't know if they are still available, but Harley offered several choices in their screamin eagle line. If I remember right, they came with Teflon coated skirts.
I guess my point is research costs nothing and may lead to better choices based on facts.
There is so much false information and rumors out there it is unreal.
I don't know if they are still available, but Harley offered several choices in their screamin eagle line. If I remember right, they came with Teflon coated skirts.
I guess my point is research costs nothing and may lead to better choices based on facts.
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Joined: May 2006
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From: Ohio
Forget the torque cones!! They are used with drag pipes to allegedly make up for the loss of back pressure with open pipes. The 2/1 Thunderheader makes both HP and torque, no need for anything else. Oh, they sound great, even greater when you increase CR.
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From: Lincoln ne
I've been learning a lot this last week or so. My ol lady is getting plenty irritated because I've always got my nose in something reading it. Ill research the pistons and see what I can find. I'm going to call bob wood and a couple other places today. Ask which formula would be more effective. I talked to bob about the w6h and the w8 a couple days ago and he said no w8 unless you're over 10.1:1 compression. I'm just wondering if it will be more effective to get all my extra compression from my pistons or a combo of piston and lowered head. Kinda back to the drawing board in the cam... hahaha oh well I've got plenty of time for it.
Thanks for the info on the tq cones. I had been told that if the heads aren't bathtubbed you can pick up the same effect by using them.
Thanks for the info on the tq cones. I had been told that if the heads aren't bathtubbed you can pick up the same effect by using them.
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From: Lincoln ne
Okay so its going to.be 10.5:1 compression kb pistons, headwork, crane h290-2 cam, dyna 2000i ignition, thunderheader, and the mikuni carb.
Do I have to pay the rip off price of $50 for the pingle tank conversion kit or has someone found the proper plug and adapter at the local hardware store?
Do I have to pay the rip off price of $50 for the pingle tank conversion kit or has someone found the proper plug and adapter at the local hardware store?
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Joined: Jan 2013
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From: Overseas
If you want to go faster (top speed), change the gearing ... but as the FLHS rider wrote, are you sure the FLHR is going to handle? I have a 96 and say they don't. Spend to fix that first; frame and brakes.
I was looking at power curves of exhaust pipes the other day and one interesting one stood out ... to get the final additional 3 or 5 top end horsepower to make the big number, it lost between 15% to 30% of power at the kind of RPMs that most of us spend all of our time riding between.
Considered your pay offs very well.
The amount of time you can actually spend using your main jet is minimal. Go buy anything from an old Kawasaki Ninja to a BMW, rat it out to make it look respectable, and get the need for speed out of your system that way. Or if it's lulz you are after, why not just go Nitrous ... for when you need it?
I say the Road King is too big, fat and wobbly for all that stuff. You could quite easily end up spending as much as would buy you an old FXR to play with if you must stick with an American bike.
I was looking at power curves of exhaust pipes the other day and one interesting one stood out ... to get the final additional 3 or 5 top end horsepower to make the big number, it lost between 15% to 30% of power at the kind of RPMs that most of us spend all of our time riding between.
Considered your pay offs very well.
The amount of time you can actually spend using your main jet is minimal. Go buy anything from an old Kawasaki Ninja to a BMW, rat it out to make it look respectable, and get the need for speed out of your system that way. Or if it's lulz you are after, why not just go Nitrous ... for when you need it?
I say the Road King is too big, fat and wobbly for all that stuff. You could quite easily end up spending as much as would buy you an old FXR to play with if you must stick with an American bike.
Last edited by Homeward Bound; Nov 1, 2013 at 06:57 PM.
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Joined: Jul 2012
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From: Lincoln ne
Yes the rd king will handle the power and the speed. Swapping the stock spokes out for mags. If your scoot is trued up it shouldn't wobble! If it does you need to start checking things.
Its not about a need for speed, I always ride hard and fast. Why go for an import or smaller Harley? There's plenty of road kings, street glides, ultra's, road glides that run fast with no issues. I'm not saying ill be running a rd course or anything like that. But honestly its nothing to take a tight curve at high speeds as long as you're comfortable on your bike, with your bike and those that you are with.
Its not about a need for speed, I always ride hard and fast. Why go for an import or smaller Harley? There's plenty of road kings, street glides, ultra's, road glides that run fast with no issues. I'm not saying ill be running a rd course or anything like that. But honestly its nothing to take a tight curve at high speeds as long as you're comfortable on your bike, with your bike and those that you are with.