Not a newbie but question is...
Thread Starter
|
Seasoned HDF Member
Joined: Jan 2009
Posts: 12,704
Likes: 8,311
From: Ottawa, Ontario
Not a newbie but question is...
Has anyone installed a set of aftermarket cams using a Harley tuner, in my case SEPST, and had any luck dialing them in with Smart/Auto Tune sessions? No dyno, and obviously no base map since Harley doesn't provide maps for non Harley cams.
If so, I would assume you have to find a map for Harley cams that is close to the specs of your aftermarket cams. What exactly should you be trying to match up? I've tried comparing a few, between lift, duration, opening, closing, overlap, it's difficult to determine the definition of what is close enough. If my bike was carbed it wouldn't be an issue but its EFI 2007 FLH
Hey, it's winter, I'm allowed
If so, I would assume you have to find a map for Harley cams that is close to the specs of your aftermarket cams. What exactly should you be trying to match up? I've tried comparing a few, between lift, duration, opening, closing, overlap, it's difficult to determine the definition of what is close enough. If my bike was carbed it wouldn't be an issue but its EFI 2007 FLH
Hey, it's winter, I'm allowed
Match up cam timing as close as possible. Lift can be fixed with VE. Compression can be fixed with timing and fuel. The cam timing greatly affects the Manifold Absolute Pressure readings that the ECM uses to control the fueling and timing. If anything shoot for intake opening and exhaust closing, but the closer you get to both opening and closing the better.
Assuming you talking the Pro Super Tuner not the Street Tuner. I would pass on the Street Tuner for what you are doing.
Assuming you talking the Pro Super Tuner not the Street Tuner. I would pass on the Street Tuner for what you are doing.
Thread Starter
|
Seasoned HDF Member
Joined: Jan 2009
Posts: 12,704
Likes: 8,311
From: Ottawa, Ontario
Thanks Ed, to be clear, when talking about cam timing you're referring to open/close? And yes, I use the orange Pro Super Tuner for smart tune sessions followed by running the results through My Tune as well.
Jim
Jim
Thread Starter
|
Seasoned HDF Member
Joined: Jan 2009
Posts: 12,704
Likes: 8,311
From: Ottawa, Ontario
Just had a quick look. For example S&S has nothing with similar timing to any HD cams. Just wondered if it was possible to find HD maps close enough to do smart tune sessions. Looks like the answer is no. I was just curious. Subject comes up once in while from people with HD tuners that want to try non HD offerings.
If your map reading is way off at idle you have not picked the right map.
Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
Yes I have.
The SE 204 base worked great for S&S 570s as is evident by my MAP at idle being 32-34kPa. So the crank tooth setting is good. Smart tune works quite well. As well as any other tuner. Just takes patience and understanding of the process. Reading logs etc.
The SE 204 base worked great for S&S 570s as is evident by my MAP at idle being 32-34kPa. So the crank tooth setting is good. Smart tune works quite well. As well as any other tuner. Just takes patience and understanding of the process. Reading logs etc.
Last edited by 60Gunner; Dec 12, 2021 at 01:19 PM.
Thread Starter
|
Seasoned HDF Member
Joined: Jan 2009
Posts: 12,704
Likes: 8,311
From: Ottawa, Ontario
SE 204. intake 22/34 exhaust 52/08
S&S 570. intake 20/40 exhaust 55/20
Normally I would think these cam timings are too dissimilar to use the same map. How close is close enough and how far is too far, that's the issue I'm having when trying to find cam specs similar to HD cams. I would have thought exhaust closings of 20 vs 08 would be too different? 570 comes on too late for my style of riding, 3200rpm anyway.
S&S 570. intake 20/40 exhaust 55/20
Normally I would think these cam timings are too dissimilar to use the same map. How close is close enough and how far is too far, that's the issue I'm having when trying to find cam specs similar to HD cams. I would have thought exhaust closings of 20 vs 08 would be too different? 570 comes on too late for my style of riding, 3200rpm anyway.
Trending Topics
Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
The 570s come on at 2800 and pull to 5800. I did install .030 head gaskets which put my CCP right at 200psi. Doesn't get any better. Without it it was still 190.
The 204 map was close enough in that the crank tooth setting was good. I would've liked closer timing events too but my map at idle being in the low 30s is what's important here and allowed me to tune it quite nicely. The 204s actual timing table changed considerably. Remember they have 8° advance ground into the cam.
Let me know what you go with. I'll help ya out.
The 204 map was close enough in that the crank tooth setting was good. I would've liked closer timing events too but my map at idle being in the low 30s is what's important here and allowed me to tune it quite nicely. The 204s actual timing table changed considerably. Remember they have 8° advance ground into the cam.
Let me know what you go with. I'll help ya out.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
Jason Momoa Is Turning Classic Harleys Into PHEVs
Verdad Gallardo
Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom
Verdad Gallardo
6 Weirdest Harley-Davidsons Ever Sold to the Public
Verdad Gallardo
7 Times Harley-Davidson Chucked Tradition Out the Window
Verdad Gallardo
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
