Trouble with SE204 cams
Road Warrior
Joined: Mar 2013
Posts: 1,923
Likes: 587
From: Alorton, Illinois
Did your exhaust come with 18mm ports or did you install them? Is the dyno tuner eliminating PE mode? His he trying to just roll on test or is he step testing?
I have seen good and bad w/ cobra. Their 2-1 surprisingly impressed me more that I thought. No experience with that header though.
I have seen good and bad w/ cobra. Their 2-1 surprisingly impressed me more that I thought. No experience with that header though.
Thread Starter
|
Road Captain
Joined: Aug 2007
Posts: 580
Likes: 40
From: East Tawas, MI
Did your exhaust come with 18mm ports or did you install them? Is the dyno tuner eliminating PE mode? His he trying to just roll on test or is he step testing?
I have seen good and bad w/ cobra. Their 2-1 surprisingly impressed me more that I thought. No experience with that header though.
I have seen good and bad w/ cobra. Their 2-1 surprisingly impressed me more that I thought. No experience with that header though.
As far as what the tuner did. I don't think he knew too much. He didn't mention anything other than saying he couldn't get it to stop going rich on the top end without damaging something. Not sure what that meant. He wasn't able to give me a print out of the dyno, that was a picture taken with my phone. He disconnected the Target Tune and said that it would probably mess up what he did. He was really pushing another company's cams saying that's what he's used to working with (I think he wanted me to have them switch out mine).
Now I have the whole thing taken back apart, it wasn't sumping, cam timing was correct. Just not sure whether to put the 204s back in or put the stock back in, or try a different set of cams.
Last edited by jlb0038; May 5, 2017 at 06:59 AM. Reason: add
Road Warrior
Joined: Mar 2013
Posts: 1,923
Likes: 587
From: Alorton, Illinois
Sounds to me that you found a tuning program operator and not a tuner. If the "auto" doesn't take care of it he is lost.
PE mode might be suspect. It will cause the ECM to richen up during WOT and it can also make the ECM ignore the closed loop feed back in that area. I know and understand it is advertised as 100% closed loop but that is not how the Delphi ECM o2 feed back system works. Remember that DJ didn't do anything special for this all to work. They just tapped into the old developers code that was already there, and it was never made to do what they are trying to do with it.
PE mode might be suspect. It will cause the ECM to richen up during WOT and it can also make the ECM ignore the closed loop feed back in that area. I know and understand it is advertised as 100% closed loop but that is not how the Delphi ECM o2 feed back system works. Remember that DJ didn't do anything special for this all to work. They just tapped into the old developers code that was already there, and it was never made to do what they are trying to do with it.
Road Warrior
Joined: Apr 2009
Posts: 1,258
Likes: 114
From: Jackson, Ohio
Did you provide the "dyno tuner" the map that Fuel Moto sent you on a thumb drive?
Don't take for granted he has the ability or cares to read the loaded program and start his tune from that map....
If you have the ability, store his map and compare timing tables against Fuel Moto's map.
See if he started with that map. I'd compare the enrichment, etc... tables as well....
Don't take for granted he has the ability or cares to read the loaded program and start his tune from that map....
If you have the ability, store his map and compare timing tables against Fuel Moto's map.
See if he started with that map. I'd compare the enrichment, etc... tables as well....
Grand HDF Member
Joined: Nov 2004
Posts: 3,917
Likes: 184
From:
Thanks for the response...They came with both bungs.
As far as what the tuner did. I don't think he knew too much. He didn't mention anything other than saying he couldn't get it to stop going rich on the top end without damaging something. Not sure what that meant. He wasn't able to give me a print out of the dyno, that was a picture taken with my phone. He disconnected the Target Tune and said that it would probably mess up what he did. He was really pushing another company's cams saying that's what he's used to working with (I think he wanted me to have them switch out mine).
Now I have the whole thing taken back apart, it wasn't sumping, cam timing was correct. Just not sure whether to put the 204s back in or put the stock back in, or try a different set of cams.
As far as what the tuner did. I don't think he knew too much. He didn't mention anything other than saying he couldn't get it to stop going rich on the top end without damaging something. Not sure what that meant. He wasn't able to give me a print out of the dyno, that was a picture taken with my phone. He disconnected the Target Tune and said that it would probably mess up what he did. He was really pushing another company's cams saying that's what he's used to working with (I think he wanted me to have them switch out mine).
Now I have the whole thing taken back apart, it wasn't sumping, cam timing was correct. Just not sure whether to put the 204s back in or put the stock back in, or try a different set of cams.
Thread Starter
|
Road Captain
Joined: Aug 2007
Posts: 580
Likes: 40
From: East Tawas, MI
Did you provide the "dyno tuner" the map that Fuel Moto sent you on a thumb drive?
Don't take for granted he has the ability or cares to read the loaded program and start his tune from that map....
If you have the ability, store his map and compare timing tables against Fuel Moto's map.
See if he started with that map. I'd compare the enrichment, etc... tables as well....
Don't take for granted he has the ability or cares to read the loaded program and start his tune from that map....
If you have the ability, store his map and compare timing tables against Fuel Moto's map.
See if he started with that map. I'd compare the enrichment, etc... tables as well....
No, I didn't give him a copy of the original map. I spent about an hour comparing the new map to my previous Target Tune map and couldn't make heads or tails of it. He did make some timing changes, but nothing drastic. I didn't check enrichment. Everything else just started running together.
Thread Starter
|
Road Captain
Joined: Aug 2007
Posts: 580
Likes: 40
From: East Tawas, MI
Thanks for all the input. After reading the posts and thinking about it a few days, I think I'm gonna put back in the 204's and plan a roadtrip down to Alorton, IL and see Hrdtail78. On a positive note, I have 100 ft lbs at 3000.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
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
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,899
Likes: 8,006
From: poway
Jason knows his stuff.
Thread
Thread Starter
Forum
Replies
Last Post
producer
General Harley Davidson Chat
0
Jan 26, 2008 06:12 PM