When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Engine Mechanical TopicsDiscussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
Thanks in advance to all who reply, Im in Vancouver BC and looking for bolt in cams cams only no future upgrades , I don't have the skill set to install my self and . Im so cammed out been reading threads forever yes I read fuel motos 103 shoot out . My local shops have recommended the following not many in vancouver
TW7H what is the difference between the TW 777 and TW 7H I can only find dynos on the TW777 ???
TW555
MR103
I have a 2013 street bob 103
Fuel Pack 3
Bassani Road Rage Ripper
SE air intake
I ride mostly ride in the city and highway solo Im 230 lbs Im not looking for high speed just usable torque 2500ish to 4500 using only the FP 3and what I have listed above Im not looking for a dyno tune .
I understand my 2 into 1 i short and will lose some bottom end torque please keep this to 103 not any other builds than cam only
thank you much respect to all
Last edited by rat bastard; May 19, 2022 at 08:06 PM.
The TW-777 and 7H are going to need more compression to do well for you. TW-555 works great on stock builds w only Stage 1. Dont know about the other cams.
Dont focus on the numbers on the dyno charts like max hp and max torque. Focus on where the torque starts and stops and how smooth / steep the curve is and how it matches to your riding style. If you over cam an engine you will be very disappointed.
Also make sure your exhaust matches the cam. If they dont match you can spend a lot of $$ for little benefit. Talk to @fuelmoto and they can help advise you, they have never steered me wrong.
I have a buddy that I helped put a cam in his bike and he put some weird Trask exhaust on it. He is still trying to tune out some bad flat spots on low end acceleration and spent a bunch extra on dyno time. Me, I am rocking along w a great FM tune to start and autotuned it to smooth out the edges.
The TW 222 is a low mid cam, awesome in my 96” , just throwing it out there, I ride between 2500-4500, perfect for me.
In lighter bikes like ours it really barks at 3500
From personal experience, I've run the MR103 and would say it's not that great. I couldn't feel much gain from just the stage 1 and a good dyno tune. If I had the chance to go back in time, for my 103" heritage I would go with CR570-2 every time.
I have attached the numbers from fuel motos 103 shoot out for reference ( a big thanks to who made the excel spread sheet) these are the cams that have been recommended all look iidentical except the 2500 MR103 seems to hold TQ. Im still mot sure what the difference is between the TW777 and the TW7H I wil reach out to Fuel Moto for advice
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.
Another Cam selection thread TW7H- TW555-MR103
