06 SG, carb, 95", Andrews 21's, 85cc stock heads, Fatcat, .030 hg, 176psi ccp. Carb has NOKK needle, 200 main, 48 pilot. Put a couple hundred miles on before the DTT and was very happy with overall performance. Wanted to get some more advance at idle, and maybe improve, but at least not hurt, everywhere else. Started with the recommended 5&7 settings and it was a slug, didn't hear any ping, but just didnt pull hard, especially in the 60 mph roll on. Seem to have the best results with mid settings, 3&5, 4&4. Last weekend went 1700 miles with some idle timing added to a base 5&1 setting. From what I've seen from other threads, that is similar to the SE module #2 setting, but it seems kind of lazy through the gears. Did average 40 mpg for the trip. The question is which curve setting is closest to stock, or does anybody really know what the stock curve looks like? How aggressive can I get with this mild build, or am I just wasting time? I know this is probably overkill for this mild build, but the idle and low speed manners are so nice with the added advance, i'd like to get it dialed in.
5 and 5 are supposed to be close to stock but I had the same luck as you. I have a similar build and had an identical one to start with ie 21's, .030 95, 2.1 etc. I had some custom maps built but none of them did as well as the stock module. Always seemed sluggish and when was not sluggish it pinged. I have a custom map that was made for your build by a well known DTT tuner that I could send you.
Jeff, I would appreciate the map, would be interesting to compare to the canned ones, how did it work for you?
I would look at the jetting first... if you are pig rich, get that corrected first... then play with timing.
Quote from: Ed S on May 27, 2009, 08:36:39 PM
Jeff, I would appreciate the map, would be interesting to compare to the canned ones, how did it work for you?
It did not work as well as my stock module.
Quote from: george248 on May 27, 2009, 08:39:28 PM
I would look at the jetting first... if you are pig rich, get that corrected first... then play with timing.
:up: :up:
A little backgroung on jetting. Last year when it went 95" with 203's I had a ping on roll on that seemed to be blamed on a lean condition. Wound up with a 205 main, 50 pilot, and .025 shim under the needle. Now that was pig rich. When I put the 21's in a couple months ago, I took the shim out, went with a 195 main, and a 48 pilot. Even with the rich setup previous, I was getting 40 mpg average. After the cams and leaning the jets, it was down to 35 mpg, surprise. Even made a point of not playing with my new found torque for a couple tanks to get a fair reading. Installed the NOKK needle, and instantly picked up 5 mpg minimum, and it is crisper. Tried a 46 pilot, and just didn't like it, didn't notice a much difference in mileage. Bottoming the idle screw will lump it up pretty bad with the 48. Then I installed the DTT and lost some performance, but not mileage. The 200 went in this past weekend, and I really can't say I noticed any difference, other than maybe a slight drop in mpg over 80mph, but I didn't have a good base line to judge. Bottom line, I just don't think the carb is that far off, I am going back to the 195.
Jeff, did you wind up with the stock module?
My experience with the DTT is this:
When trying to eliminate a ping by turning the dials, you will be pulling too much timing everywhere (hurting power) By using a custom map or tweaking the tables to pull timing only in your "problem areas" you can have your cake and eat it too.
If you have the cables and software, try my map in this thread:
http://harleytechtalk.net/htt/index.php?topic=8500.0
it is on page three... reply#40
there are some more DTT maps here:
http://harleytechtalk.net/htt/index.php?topic=941.0
getting the carb and DTT set up right can take some time but can be done by first getting the jets close and then following the ignition setup procedures.
Quote from: Ed S on May 28, 2009, 06:08:06 AM
Jeff, did you wind up with the stock module?
Yes stock works best for me. I sent you some of the dtt maps.
Jeff, got em, thanks for the help. George, saw your map in the other thread and tried one very similar, didn't work for me. I guess these low comp., baby cams need something else. I'll tinker with it some more. Thanks for the input.