Author Topic: Drop-on 110 stroker crank  (Read 593 times)

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Offline NHBAGGER

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Drop-on 110 stroker crank
« on: February 11, 2018, 10:16:15 AM »
Has anyone installed a stroker crank on their 110 drop-on setup?  Curious if it's possible and what's out there?

Offline martinj

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Re: Drop-on 110 stroker crank
« Reply #1 on: February 11, 2018, 12:27:33 PM »
The wrist pin is already only 0.020" or so from the oil rings, so you would likely need shorter rods in order to avoid the need for taller barrels. I suppose anything is possible, it just boils down to what you're willing to do (and spend) to make it work.

Offline 1FSTRK

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Re: Drop-on 110 stroker crank
« Reply #2 on: February 11, 2018, 12:29:26 PM »
Maybe check the math on the 120r crank and rods.
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Offline FXDBI

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Re: Drop-on 110 stroker crank
« Reply #3 on: February 11, 2018, 12:43:53 PM »
Okay got to ask WTF is a stroker crank for a 110?  What's the difference in the 43/8 crank to call it a stroker?   Thought the 110 drop on kit was for a stock 43/8 crank.   Bob

Offline Ohio HD

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Re: Drop-on 110 stroker crank
« Reply #4 on: February 11, 2018, 12:45:38 PM »
It really only means a crankshaft that has a longer than stock stroke. The 110 stroke is 4-3/8, so anything longer is considered a stroker crank.If you have an 88 inch, then use a 4-3/8 crankshaft, technically it's a stroker crank to that motor.
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Offline 1FSTRK

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Re: Drop-on 110 stroker crank
« Reply #5 on: February 11, 2018, 12:50:33 PM »
Okay got to ask WTF is a stroker crank for a 110?  What's the difference in the 43/8 crank to call it a stroker?   Thought the 110 drop on kit was for a stock 43/8 crank.   Bob

I think the key is "Drop on 110" meaning the 4" bore piston and drop on cylinder kit that you can use without boring the cases to make a 110 with the stock 4 3/8 crank. Now will a stroker crank work with that same 4" bore kit or at least the cylinders.
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Offline FXDBI

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Re: Drop-on 110 stroker crank
« Reply #6 on: February 11, 2018, 12:56:56 PM »
It really only means a crankshaft that has a longer than stock stroke. The 110 stroke is 4-3/8, so anything longer is considered a stroker crank.If you have an 88 inch, then use a 4-3/8 crankshaft, technically it's a stroker crank to that motor.

Thanks Brian that's what I thought just a longer stroke than the original it came with.  Bob

Offline FXDBI

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Re: Drop-on 110 stroker crank
« Reply #7 on: February 11, 2018, 01:06:47 PM »
Okay got to ask WTF is a stroker crank for a 110?  What's the difference in the 43/8 crank to call it a stroker?   Thought the 110 drop on kit was for a stock 43/8 crank.   Bob

I think the key is "Drop on 110" meaning the 4" bore piston and drop on cylinder kit that you can use without boring the cases to make a 110 with the stock 4 3/8 crank. Now will a stroker crank work with that same 4" bore kit or at least the cylinders.

Well I am going to find out soon if it will fit in a 2006 Dyna with out case boring.  I had talked to Steve from GMR about this and he had done a older 88 with drop on cylinders and a 43/8 crank. He said the case wasn't machined deep enough and interfered with the bottom of the piston skirts and needed to be bored. He had never done a 06 Dyna and didn't know if it had the same problem or not guess I will find out. I have the kit and a new take out 43/8 crank sitting here waiting. If I have to machine the cases I will sell the drop on kit and go with 4.125 cylinders. If I have to pay to machine them I might has well go bigger.   Bob

Offline 1FSTRK

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Re: Drop-on 110 stroker crank
« Reply #8 on: February 11, 2018, 01:59:35 PM »
Okay got to ask WTF is a stroker crank for a 110?  What's the difference in the 43/8 crank to call it a stroker?   Thought the 110 drop on kit was for a stock 43/8 crank.   Bob

I think the key is "Drop on 110" meaning the 4" bore piston and drop on cylinder kit that you can use without boring the cases to make a 110 with the stock 4 3/8 crank. Now will a stroker crank work with that same 4" bore kit or at least the cylinders.

Well I am going to find out soon if it will fit in a 2006 Dyna with out case boring.  I had talked to Steve from GMR about this and he had done a older 88 with drop on cylinders and a 43/8 crank. He said the case wasn't machined deep enough and interfered with the bottom of the piston skirts and needed to be bored. He had never done a 06 Dyna and didn't know if it had the same problem or not guess I will find out. I have the kit and a new take out 43/8 crank sitting here waiting. If I have to machine the cases I will sell the drop on kit and go with 4.125 cylinders. If I have to pay to machine them I might has well go bigger.   Bob

I think the only thing that needs relieving is the case under the spigot counter bore and you can do that with a die grinder by hand because your going to have the crank out.
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Online TorQuePimp

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Re: Drop-on 110 stroker crank
« Reply #9 on: February 11, 2018, 05:34:54 PM »
If you are splitting the cases....the bolt on kit would really be best left on the shelf

Kinda kills the whole idea of a bolt on kit

Offline FXDBI

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Re: Drop-on 110 stroker crank
« Reply #10 on: February 11, 2018, 05:46:55 PM »
If you are splitting the cases....the bolt on kit would really be best left on the shelf

Kinda kills the whole idea of a bolt on kit

Why would that be it becomes bolt on parts then is all. Machine shop time adds $$$for the do it at home guy.  Bob

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Re: Drop-on 110 stroker crank
« Reply #11 on: February 11, 2018, 06:05:58 PM »
If you are splitting the cases....the bolt on kit would really be best left on the shelf

Kinda kills the whole idea of a bolt on kit

Why would that be it becomes bolt on parts then is all. Machine shop time adds $$$for the do it at home guy.  Bob
I'm not aware of a shorter rod or piston available for the steel cylinder for a 4.5"+ stroke

New crank and all.....putting together a 120" would be less money than custom pistons,bolt on cylinders and a new s&s crank.....and done right

Diy I get but spending more for less. Don't get

Offline FXDBI

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Re: Drop-on 110 stroker crank
« Reply #12 on: February 11, 2018, 06:27:05 PM »
If you are splitting the cases....the bolt on kit would really be best left on the shelf

Kinda kills the whole idea of a bolt on kit

Why would that be it becomes bolt on parts then is all. Machine shop time adds $$$for the do it at home guy.  Bob
I'm not aware of a shorter rod or piston available for the steel cylinder for a 4.5"+ stroke

New crank and all.....putting together a 120" would be less money than custom pistons,bolt on cylinders and a new s&s crank.....and done right

Diy I get but spending more for less. Don't get

 43/8 stroke crank we were talking not 41/2 stroke.  I have a 2006 Dyna and got a brand new 43/8 take out with zero miles and bought the 110 drop on kit. Minimal spent to go 110 from 95.  Bob

Added: crank was from a 2016 103 HO it has .0005 run out in v blocks $500 Canadian it fit the budget.

Offline 1FSTRK

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Re: Drop-on 110 stroker crank
« Reply #13 on: February 12, 2018, 04:48:53 AM »
If you are splitting the cases....the bolt on kit would really be best left on the shelf

Kinda kills the whole idea of a bolt on kit

Why would that be it becomes bolt on parts then is all. Machine shop time adds $$$for the do it at home guy.  Bob
I'm not aware of a shorter rod or piston available for the steel cylinder for a 4.5"+ stroke

New crank and all.....putting together a 120" would be less money than custom pistons,bolt on cylinders and a new s&s crank.....and done right

Diy I get but spending more for less. Don't get

 43/8 stroke crank we were talking not 41/2 stroke.  I have a 2006 Dyna and got a brand new 43/8 take out with zero miles and bought the 110 drop on kit. Minimal spent to go 110 from 95.  Bob

Added: crank was from a 2016 103 HO it has .0005 run out in v blocks $500 Canadian it fit the budget.

Sounds like a solid plan Bob, I would do the same if it were mine. I can not say for sure but I would guess that because you have the later style cases you will be bolt in. The 99-06 cases in all the other models are where I know they need more clearance for the 4"bore when you add the 4 3/8 stroke. Let us know how it goes, made a couple pictures when you get to taking it apart.
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Offline N-gin

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Re: Drop-on 110 stroker crank
« Reply #14 on: February 12, 2018, 08:30:10 PM »
Isn't the output shaft different for the 4" and 4 3/8, on the crank?
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Offline FXDBI

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Re: Drop-on 110 stroker crank
« Reply #15 on: February 12, 2018, 08:50:06 PM »
Isn't the output shaft different for the 4" and 4 3/8, on the crank?

Not on the 06 Dyna it was a bastard child one year only.  Bob

Offline koko3052

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Re: Drop-on 110 stroker crank
« Reply #16 on: February 12, 2018, 08:59:34 PM »
You can get pretty much any style of output shaft on 4 3/8" now a days, just say S&S.

Offline 1FSTRK

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Re: Drop-on 110 stroker crank
« Reply #17 on: February 13, 2018, 03:52:17 AM »
You can get pretty much any style of output shaft on 4 3/8" now a days, just say S&S.

Maybe thanks to the 06 Dyna and early CVO nodels, both S&S and and Screamin Eagle have 4", 4 3/8", and 4 5/8" cranks on the shelf with early and late sprocket shafts. The SE 23728-07A at about $725 on line a very inexpensive way to go 4 3/8 in the early Twin cams if you touring and are not racing.
« Last Edit: February 13, 2018, 03:59:04 AM by 1FSTRK »
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Offline dsvracer

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Re: Drop-on 110 stroker crank
« Reply #18 on: February 13, 2018, 06:55:26 AM »
why would you want to buy a crank that is known to have problems ??  I am for the better S&S crank on any replacement crank issues.
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Offline 1FSTRK

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Re: Drop-on 110 stroker crank
« Reply #19 on: February 13, 2018, 10:57:20 AM »
why would you want to buy a crank that is known to have problems ??  I am for the better S&S crank on any replacement crank issues.

Actually I don't know that they are know to have problems in street most performance street uses. Darkhorse plugs them and sells them with out any disassemble, inspection, or parts changes other than the plug and weld. I have seen them used locally with just a plug installed by the builder with no problems. Are you aware of a high failure rate on the SE cranks with recent build dates?
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