M8 Dyno Numbers
Supporter
Joined: Mar 2020
Posts: 1,009
Likes: 598
From: Northeast Louisiana
Sons 2022 Lowrider bone stock untouched would pull my SE 128" Stage IV from a punch about 2 bike links in a 3rd gear 3000 rpm punch running to redline.
Now he has the Power cam and upgraded exhaust he can pull me about 4 bike links starting in 1st gear at 3000 rpm pretty quickly then we stay at the same 4 bike links to 108mph.
That 117 is bad *** for sure.
My 128 was close to 130 in torque and Hp when tuned.
About 160 more in weight sure but even bone stock the LR does scream!
Seasoned HDF Member
Joined: Jan 2008
Posts: 13,681
Likes: 11,473
From: State of Confusion
Yes! Cam is very close to the M8 torque torque cam.
Sons 2022 Lowrider bone stock untouched would pull my SE 128" Stage IV from a punch about 2 bike links in a 3rd gear 3000 rpm punch running to redline.
Now he has the Power cam and upgraded exhaust he can pull me about 4 bike links starting in 1st gear at 3000 rpm pretty quickly then we stay at the same 4 bike links to 108mph.
That 117 is bad *** for sure.
My 128 was close to 130 in torque and Hp when tuned.
About 160 more in weight sure but even bone stock the LR does scream!
Sons 2022 Lowrider bone stock untouched would pull my SE 128" Stage IV from a punch about 2 bike links in a 3rd gear 3000 rpm punch running to redline.
Now he has the Power cam and upgraded exhaust he can pull me about 4 bike links starting in 1st gear at 3000 rpm pretty quickly then we stay at the same 4 bike links to 108mph.
That 117 is bad *** for sure.
My 128 was close to 130 in torque and Hp when tuned.
About 160 more in weight sure but even bone stock the LR does scream!
Supporter
Joined: Mar 2020
Posts: 1,009
Likes: 598
From: Northeast Louisiana
I did however purchase the competition baffle for my bike as I noticed a whistle over 3500 rpm and discovered it to be the exhaust trying to get thru the quiet baffle😳 (almost sounds like a turbo spooling up😂
. Hope it doesn't drop my bottom end torque😬, but definitely has to help above 3500 as damn sure restricted!Have cut my windshield down to 16" already and may go a bit more.
5 more day on this ship and I have about $600 (baffle included) to install on her.
Ride Safe!✌🏼
Road Captain
Joined: Sep 2019
Posts: 689
Likes: 339
From: Dayton OH
Add a 250 pound driver to a 3,500 pound car and you have added 7% to its mass to move.
Add a 250 pound rider to a 650 pound motorcycle and you added 38% to its mass to move. Lets strap 38% of your body weight to your back and see how quick you get to a sprint. Weight matters a lot more to a motorcycle.
The only thing that get easier to pick up as it gets heavier is women. I know pearls of wisdom.
Softails are geared even taller than the touring models. Change from the 66 tooth pulley to a 70 tooth pulley the next time you change the rear tire. Improve torque to the wheel by 6%. Might be the biggest bang for the buck acceleration improvement you ever make to your bike.
Add a 250 pound rider to a 650 pound motorcycle and you added 38% to its mass to move. Lets strap 38% of your body weight to your back and see how quick you get to a sprint. Weight matters a lot more to a motorcycle.
The only thing that get easier to pick up as it gets heavier is women. I know pearls of wisdom.
Softails are geared even taller than the touring models. Change from the 66 tooth pulley to a 70 tooth pulley the next time you change the rear tire. Improve torque to the wheel by 6%. Might be the biggest bang for the buck acceleration improvement you ever make to your bike.
Last edited by VernDiesel; May 27, 2022 at 04:39 PM.
Ultimate HDF Member
Joined: Oct 2016
Posts: 5,063
Likes: 2,582
From: On my bike!
Add a 250 pound driver to a 3,500 pound car and you have added 7% to its mass to move.
Add a 250 pound rider to a 650 pound motorcycle and you added 38% to its mass to move. Lets strap 38% of your body weight to your back and see how quick you get to a sprint. Weight matters a lot more to a motorcycle.
The only thing that get easier to pick up as it gets heavier is women. I know pearls of wisdom.
Softails are geared even taller than the touring models. Change from the 66 tooth pulley to a 70 tooth pulley the next time you change the rear tire. Improve torque to the wheel by 6%. Might be the biggest bang for the buck acceleration improvement you ever make to your bike.
Add a 250 pound rider to a 650 pound motorcycle and you added 38% to its mass to move. Lets strap 38% of your body weight to your back and see how quick you get to a sprint. Weight matters a lot more to a motorcycle.
The only thing that get easier to pick up as it gets heavier is women. I know pearls of wisdom.
Softails are geared even taller than the touring models. Change from the 66 tooth pulley to a 70 tooth pulley the next time you change the rear tire. Improve torque to the wheel by 6%. Might be the biggest bang for the buck acceleration improvement you ever make to your bike.
Supporter
Joined: Mar 2020
Posts: 1,009
Likes: 598
From: Northeast Louisiana
Softails are geared even taller than the touring models. Change from the 66 tooth pulley to a 70 tooth pulley the next time you change the rear tire. Improve torque to the wheel by 6%. Might be the biggest bang for the buck acceleration improvement you ever make to your bike.
But the Touring for last several years have moved away from 66 and up to the 68 tooth (great move!). Most Softails run the 66 but the new Low Rider S is now running the 68 as well to give it more zap I suppose.
If I knew of a 70 tooth to buy I would get one right now as I am in for a tire change as usual every 3k miles (slick) as I tend to like to spin the tire as well as torque to tire very often🤷♂️
Ride Safe✌🏼
Road Captain
Joined: Sep 2019
Posts: 689
Likes: 339
From: Dayton OH
Stock M8 softail has a final drive ratio of 2.79 for emissions & mileage. 70 tooth pulley brings the gearing down to a 2.98 final drive ratio. Noticeable improvement especially in 1st and 6th. T-Man online says he thinks the best performance street final drive ratio is 2.96. Really close to what we get with just a simple pulley swap. You can also change the front sprocket. I did. Stock 32 tooth down to a 30 tooth from a turned down trike sprocket (cast) to proper thickness sprocket. Naturally this is more involved.
Doing both lowers the final drive ratio down to 3.15. First gear leaves the line HARD but is short. 6th gear 80 mph is 3,000 rpms on the Interstate IE right in peak torque which makes it fun and easy to pass a semi no gear drop required. This also means it will rev more than it needs to on the Interstate. Top speed mine will only run 140 mph with the limited power I have. But it will do it quickly. This winter I will up the power and bring the final drive ratio back to 2.98. I can do this by moving back to either the stock sprocket or the stock pulley. Just thought I would share since we were on the subject.
Doing both lowers the final drive ratio down to 3.15. First gear leaves the line HARD but is short. 6th gear 80 mph is 3,000 rpms on the Interstate IE right in peak torque which makes it fun and easy to pass a semi no gear drop required. This also means it will rev more than it needs to on the Interstate. Top speed mine will only run 140 mph with the limited power I have. But it will do it quickly. This winter I will up the power and bring the final drive ratio back to 2.98. I can do this by moving back to either the stock sprocket or the stock pulley. Just thought I would share since we were on the subject.
Last edited by VernDiesel; May 27, 2022 at 09:29 PM.
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