I have had the Fat Cat since April 2004 in my 2004 SE EGlide, Performance Baffle, Hi Flow Air Cleaner, HD Race Tuner. I have a very nice flat a/f ratio around 13.5, max hp 99.5, max tq 100. The temp at the time of tune was 87 degrees and very humid, not the best for attaining great numbers. The tq line is pretty flat with no dips from 2600rpm to 5000rpm. I told the dyno tech I was not interested in peak numbers but fairly good fuel economy first, performance second. The maps that D&D sent me were supposed to be good for performance and rated 104hp/107tq. Again, this is for the HD Race tuner. I put that map in and sucked fuel at an alarming rate, checked plugs and it was way rich. The first dyno run with the D&D map was 92hp and a/f was all over the place with a low reading of 8 (very rich) and a hi of 12. Keep in mind, the temperature, humidity, and elevation are of course different for each of us and cause diffferent results. Also dynos can varry between locations. I was told by then tech (Donnie) that the 103 motors responded better to the performance baffle but the torque curve would come in about 500rpm higher than the regular baffle. It would perform better on the top end though. So, am I happy, yes, runs great, can pull the wheel power shifting into 2nd. Fuel economy, just ran 34-38mpg on freeway, average speed was 80-85mph. I purchased my set, (ghost pipe as well) from PARTS 4-11 at a discount as advised from D&D. Only had one problem, pipe cracked at the bracket that holds ghost pipe to mount , removed it and welded it again with no problem and its not visible. I am curious if the baffle choice was correct after reading all your post. Peak numbers are only good for racing and bragging, real performance and fuel economy were more important to me. Lots of comments on great looks and the distinctive raspy sound. Yep, its loud when ya turn the wick! I have attached the dnyo, red is D&D Map and Blue is tuned by dyno tech.
Author
Topic: D&D Fat Cat's w/ Performance Baffle (Read 16097 times)