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CVO Technical => Milwaukee-Eight => Topic started by: Vpreef on July 16, 2021, 09:08:42 PM
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Hi all,
Just had my 21 SG 117 stage 2 done with the below mods
S&S Cam, lifters, pushrods
Cobra True dual headers
Khrome werks 4.5 mufflers with louvered inserts
Maximus Tuner
Result was 108HP, 128 Ft Torque - (uncorrected)
These seem a little low and lower than my 114 had with the same tuner and came, stock headers.
Just wondering anyone’s thoughts if something not right here?
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Can you post the sheet? It helps to see the curve.
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my 2 cents is ... true duals and 4.5 mufflers wont help in your pursuit for big numbers :nixweiss:
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Agreed and the m8 is very exhaust sensitive, let's see the dyno.
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my 2 cents is ... true duals and 4.5 mufflers wont help in your pursuit for big numbers :nixweiss:
See people making 120+ horsepower with same system in a 114 🤷♂️
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Heres my Dyno print
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Looks about right to me!
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Don't worry about the numbers. Numbers are an arbitrary figure. What matters is your torque curve, and that one looks pretty darn good. Leave it.
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You list an S&S cam, but not which one...?
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You list an S&S cam, but not which one...?
475
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What head pipes does this bike have?
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What head pipes does this bike have?
Cobra True Dual.
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Change the cam to a CR480 and change the head pipe to V&H power duals and now you will see the same or better torque and 120hp. Parts choices matter, the group of them and how they play together. There are no good pipes, great cams, the best anything!
This is a less than good result for the dollars spent, in my opinion.
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Change the cam to a CR480 and change the head pipe to V&H power duals and now you will see the same or better torque and 120hp. Parts choices matter, the group of them and how they play together. There are no good pipes, great cams, the best anything!
This is a less than good result for the dollars spent, in my opinion.
So you suggesting the S&S 475 cam and Cobra headers are no good? I have seen 120hp+ on 114’s with this setup?
I just spent alot on installing these don’t think im going to be swapping them out anytime soon.
I have since heard the 21 model tourers like mine are proving hard to get alot of HP out of due to tuning software limitations 🤷♂️
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So you suggesting the S&S 475 cam and Cobra headers are no good? I have seen 120hp+ on 114’s with this setup?
I just spent alot on installing these don’t think im going to be swapping them out anytime soon.
I have since heard the 21 model tourers like mine are proving hard to get alot of HP out of due to tuning software limitations 🤷♂️
I Agree with HDSP, your setup is less than stellar for an M8 motor with what you've done. You asked for critique and indicated that you didn't think what you had was right. A well known builder gave you what you asked for and now you seem to want to be irritated with his opinion.
He didn't say the parts were no good he said they weren't the best when working together and I agree. Of course only my opinion.
I may be wrong but I believe the tuner that you used will only compensate fuel delivery in a small segmented application and will not allow for any timing changes, again, I could be wrong. Last I knew the tuning software for the full range tuners was still not available for the 21's. I haven't looked in a bit maybe someone else knows if this has changed?
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I Agree with HDSP, your setup is less than stellar for an M8 motor with what you've done. You asked for critique and indicated that you didn't think what you had was right. A well known builder gave you what you asked for and now you seem to want to be irritated with his opinion.
He didn't say the parts were no good he said they weren't the best when working together and I agree. Of course only my opinion.
I may be wrong but I believe the tuner that you used will only compensate fuel delivery in a small segmented application and will not allow for any timing changes, again, I could be wrong. Last I knew the tuning software for the full range tuners was still not available for the 21's. I haven't looked in a bit maybe someone else knows if this has changed?
Im not irritated, not sure why you assume that.
So the headers, Mufflers and Cam are not ideal for an M8, so curious as to why some get good HP from a 114 and my 117 was poor. Same Cam, Same pipes 🤷♂️. But being a different Cam and V&H headers would be a stellar setup? Would be good to see if Anyone has any proof of this on a 21, 117?
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It’s a pretty far stretch to see 2 different bikes show the same dyno chart numbers.
Even the same bike on 2 different dyno’s.
Your torque curve looks pretty decent, keep the combo you have, don’t worry about the numbers and just ride it.
Both of my big motors have the “potential” for bigger numbers, but both are nice riding bikes with “restricted “ mufflers, etc that work well for ME.
JMHO
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This is a 19. It is stock heads and tb but I bored it up to 120. A cheap build with big results.
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Your torque curve looks pretty decent, keep the combo you have, don’t worry about the numbers and just ride it.
That's it in a nutshell. Too many folks get caught up in "chasing numbers". That curve looks very fun to ride, a nice broad band of torque across the riding range. No sense tearing it apart and changing stuff just to get a few more numbers,
But I could be wrong.
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There are so many variables. It's hard to tell what's going on.
For example: I have a setup similar to what HD Street Performance recommended in my 117. CR480, Vance & Hines Power Duals, and S&S Grand Nationals with decibel reducers in to keep low end torque. The bike made 112/128 in a 5th gear pull.
Now my friend's bike with a 114, three cubes smaller with the S&S 475 cam, decatted stock header, and same slip-ons as me, Grand Nationals with decibel reducers. BOTH bikes tuned by the SAME person....his 5th gear pull was 116/129. Maybe the conditions were right for a few more ponies? Who knows. I know that if my bike had 3 more HP on paper, I probably wouldn't notice.
I'll also say this: I'm no expert but your torque curve with that exhaust combination seems to be defying all rules when it comes to performance. Theoretically there should be a massive low/mid range dip. Yours hits hard and keeps going. If it feels good, ride on!
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How much difference between Corrected HP and uncorrected HP?
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How much difference between Corrected HP and uncorrected HP?
Typically about -3
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Im not irritated, not sure why you assume that.
So the headers, Mufflers and Cam are not ideal for an M8, so curious as to why some get good HP from a 114 and my 117 was poor. Same Cam, Same pipes 🤷♂️. But being a different Cam and V&H headers would be a stellar setup? Would be good to see if Anyone has any proof of this on a 21, 117?
My apologizes if I misread your reply.
I think the biggest culprit in your results is the tuner, or lack thereof. Unfortunately, nothing to do for this until they get it figured out for the 2021's.