96 to 103 questions
#11
I was waiting for someone to chime in that unless you increase the compression, the gains will be fairly moderate.
I'm still with stock 96 inches (13k miles), but won't do the pistons and jugs unless I can increase the compression to 10.25 or 10.5:1 to see (and feel) good bang for the buck gains.
Take a look at Fuel Moto's site with regards to all the dyno graphs of various 96 and 103" combos. You'll see a more torque with the 103, but still probably around 95-100hp with stock compression.
I'm not an expert by any stretch, but I've been researching my next upgrade from 96", and it seems the compression is more important than the cubes in terms of performance gains.
I'm still with stock 96 inches (13k miles), but won't do the pistons and jugs unless I can increase the compression to 10.25 or 10.5:1 to see (and feel) good bang for the buck gains.
Take a look at Fuel Moto's site with regards to all the dyno graphs of various 96 and 103" combos. You'll see a more torque with the 103, but still probably around 95-100hp with stock compression.
I'm not an expert by any stretch, but I've been researching my next upgrade from 96", and it seems the compression is more important than the cubes in terms of performance gains.
#12
I have my ACR's wired into the starter on both of my bikes that have them. It eliminates kick back issues on higher compression motors.
Also, I would consider going with a .30 head gasket as opposed to the stock gasket. The '16 Rushmore motors were running 9.7:1 compression. Dropping to a .30 gasket would get you close to 9.9:1 at no additional cost.
Depending on the cams you select for not a lot of money you could have another .005 or .010 decked off the heads or juggs to get you closer to 10.3:1 or 10.4:1. You would need adjustable push rods if you went this route but the bump in compression is where you are going to make significant gains in HP and TQ
Also, I would consider going with a .30 head gasket as opposed to the stock gasket. The '16 Rushmore motors were running 9.7:1 compression. Dropping to a .30 gasket would get you close to 9.9:1 at no additional cost.
Depending on the cams you select for not a lot of money you could have another .005 or .010 decked off the heads or juggs to get you closer to 10.3:1 or 10.4:1. You would need adjustable push rods if you went this route but the bump in compression is where you are going to make significant gains in HP and TQ
#14
#15
#16
#17
So, a little bit of an update...
I wound up agreeing on a deal that will net me the complete top end off the 2016 103 that is coming apart with 100 miles on it. For $600 shipped (a pretty good deal I think) I'll be getting the heads, jugs, pistons, injectors and throttle body. Not sure if the throttle body and injectors are any different than what's currently on my 96, but it's all coming from the same motor so I figured it cant hurt. Now I'm trying to decide if the use of a gear drive cam is really worth twice the price. I cant check the run out to see if it's in spec until the bike is apart, which would add up to extra time down which I'm really not looking to do.
Tuners? haven't heard anything too great about the Harley tuners. The names I'm hearing are power vision and TTS...thoughts?
I wound up agreeing on a deal that will net me the complete top end off the 2016 103 that is coming apart with 100 miles on it. For $600 shipped (a pretty good deal I think) I'll be getting the heads, jugs, pistons, injectors and throttle body. Not sure if the throttle body and injectors are any different than what's currently on my 96, but it's all coming from the same motor so I figured it cant hurt. Now I'm trying to decide if the use of a gear drive cam is really worth twice the price. I cant check the run out to see if it's in spec until the bike is apart, which would add up to extra time down which I'm really not looking to do.
Tuners? haven't heard anything too great about the Harley tuners. The names I'm hearing are power vision and TTS...thoughts?
#18
Both will work. With the TTS you will have to get Dyno Tuned. With the Power Vision you can get a canned tune that is very close and the Auto Tune will dial it in. If you purchase it from Fuel Moto you get a life time of map and tuning support. They would most likely have a map for your exact set up. When you add mods at a later date you can simply get another map.
Last edited by BB59; 04-07-2018 at 11:47 AM.
#20