18k miles on 2019 M8 SE 128" time to upgrade...
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From: Northeast Louisiana
18k miles on 2019 M8 SE 128" time to upgrade...
I have a perfect running with 0 issues 2019 Roadking, now @ over 18k miles.
This winter, I am planning on going to the Andrews 554 cam, Fueling Lifters and Roller rockers. (TORQUE that keeps on keeping on).
Since I am pulling the heads to inspect, clean and keep the 1 piece pushrods, contemplating going with better pistons. Just don't want to have to do anything to my existing cylinders, other than a very light hone/clean up.
Pistons/Comp Ratio - anyone with great results?
Thanks, ride safe and Godspeed!
This winter, I am planning on going to the Andrews 554 cam, Fueling Lifters and Roller rockers. (TORQUE that keeps on keeping on).
Since I am pulling the heads to inspect, clean and keep the 1 piece pushrods, contemplating going with better pistons. Just don't want to have to do anything to my existing cylinders, other than a very light hone/clean up.
Pistons/Comp Ratio - anyone with great results?
Thanks, ride safe and Godspeed!
Road Warrior
Joined: Nov 2022
Posts: 1,551
Likes: 548
From: MN
Tons of builders on here. I did Stage III to my 107, but need 114 cylinders to have enough wall thickness. Ostensibly, you can go to 119cid, but my machinist would only go to 117cid wall thickness, because he does full custom DynoJet tune for max performance.
.
I'm assuming your early M8 is a 107? Anyway, the builder insisted on molykote piston skirts, as does Steve Cole. So he uses JP Pistons instead of Cirillo. $tonecold consulted and advised TTS-175 cam instead of TTS-200 recommended by Steve (too conservative), so I put that in.
I also put in SE upsized injectors just to be sure I wasn't working them too hard (duty cycle) as I like to get on it from stops. As a cruiser, I do a fair number of stop/starts at highway intersections. Let me tell you, on a Heritage the 117 III really goes. If you want more for your heavier Road King get a 124 or 128 from FM.
Have fun.
.
I'm assuming your early M8 is a 107? Anyway, the builder insisted on molykote piston skirts, as does Steve Cole. So he uses JP Pistons instead of Cirillo. $tonecold consulted and advised TTS-175 cam instead of TTS-200 recommended by Steve (too conservative), so I put that in.
I also put in SE upsized injectors just to be sure I wasn't working them too hard (duty cycle) as I like to get on it from stops. As a cruiser, I do a fair number of stop/starts at highway intersections. Let me tell you, on a Heritage the 117 III really goes. If you want more for your heavier Road King get a 124 or 128 from FM.
Have fun.
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Joined: Mar 2020
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From: Northeast Louisiana
Tons of builders on here. I did Stage III to my 107, but need 114 cylinders to have enough wall thickness. Ostensibly, you can go to 119cid, but my machinist would only go to 117cid wall thickness, because he does full custom DynoJet tune for max performance.
.
I'm assuming your early M8 is a 107? Anyway, the builder insisted on molykote piston skirts, as does Steve Cole. So he uses JP Pistons instead of Cirillo. $tonecold consulted and advised TTS-175 cam instead of TTS-200 recommended by Steve (too conservative), so I put that in.
I also put in SE upsized injectors just to be sure I wasn't working them too hard (duty cycle) as I like to get on it from stops. As a cruiser, I do a fair number of stop/starts at highway intersections. Let me tell you, on a Heritage the 117 III really goes. If you want more for your heavier Road King get a 124 or 128 from FM.
Have fun.
.
I'm assuming your early M8 is a 107? Anyway, the builder insisted on molykote piston skirts, as does Steve Cole. So he uses JP Pistons instead of Cirillo. $tonecold consulted and advised TTS-175 cam instead of TTS-200 recommended by Steve (too conservative), so I put that in.
I also put in SE upsized injectors just to be sure I wasn't working them too hard (duty cycle) as I like to get on it from stops. As a cruiser, I do a fair number of stop/starts at highway intersections. Let me tell you, on a Heritage the 117 III really goes. If you want more for your heavier Road King get a 124 or 128 from FM.
Have fun.
I should have added it in the note, but as you can see in title of thread, it is already the full SE Stage 4 128" package.
So main question is better pistons to run with my current SE package and the Andrews 554 cam??
Last edited by Bayou FLHR-M8-128"; Today at 10:37 AM.
HD EFI Guru
Joined: Jan 2008
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No one size fits all answer but that said you must check hings like piston to valve clearance and spring clearance when going up to that amount of lift. You should already have 11:1 forged pistons with the 128 SE kit, and depending on where you going to ride it going higher may not be a good idea.
Road Warrior
Joined: Nov 2022
Posts: 1,551
Likes: 548
From: MN
Sorry for that - long day already! Best of luck..
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