So I know that everyone has been waiting for the results of the cam testing Steve Cole and I did at the end of last week. Let me just say that we worked our butts off for three extremely long days compiling this data.
The test mule was my 2017 Road Glide Special with a 107 ci. engine. The only mods were the stock exhaust was decatted and the left pipe was ground to the radius of the collector where it extended into main collector with Fullsac 2” cores in stock muffler cansand we ended up using an Arlen Ness Stage 1 Big Sucker air cleaner.
The cams that were tested were the SE8 462, CR460, RS468, WM8-22x, TTS 100, and the TTS 150. So here are the results.
This is Cam A
This is Cam B
This is Cam C
This is Cam D
This is Cam E
This is Cam F
So just looking at the graphs, which cam do you like and what do you think it is?
For what it's worth there was a lot of care taken in this Dyno testing to keep things as even as possible. It showed up in the correction factors after we were done. Each and every dyno run had a SAE correction factor of 0.97 applied by the software! So while there was some correction applied, it never changed from start to finish! We purchased fuel prior to starting the testing so that we would have enough to do all the testing without having to go get more, so it was from one pump at one time. Engine was cooled down and brought back up to the starting temperature prior to the Dyno runs being made. Temperature at the end of the runs was checked to make sure we were always in the same range. Short of trying to control mother nature we did everything we could so there would be no question of the repeatability of the runs. I tried to hold the starting RPM at 1250 RPM for each and every run and there all very damn close. As you all can see some would repeat themselves near dead on while others would not. I printed the graphs in smoothing factor 3 which allows one to see how smooth the engine performs, using a higher smoothing factor covers that up in some dyno reports. In some cases where the dyno run is rough and allowing that to be shown will raise the numbers but when tuned properly that is not the case. $tonecold has all the dyno data but I still need to go through all the road data to see what areas he was able to repeat the runs in for all the cams I hope. It's going to take me until this weekend to get to that, as I am trying to play catch-up here from taking the time to do all this, as my work piled up while I was tuning and testing for the 3 days.
Last edited by Steve Cole; 03-21-2018 at 07:27 PM.
Well I am not an expert by any means. Looks like cam D pulls hard. I have no idea which one it is. I assume you actually rode these as well plus the dyno? Would like to hear the seat of your pants report for each.
Well I am not an expert by any means. Looks like cam D pulls hard. I have no idea which one it is. I assume you actually rode these as well plus the dyno? Would like to hear the seat of your pants report for each.
Thanks
Yes I rode them. I attempted to do a third gear roll on from 1500 to 6000 rpm. Our first test track had quite a bit of traffic, so I think there were one or two that I only made it to 5000 rpm. I then found another test area that allowed testing without the threat to life, so then it was 6000 rpm for the rest.
I vote for Cam D, pulls harder at the top, as in plenty of torque at the top of the mountain. I run decat also and would look for the most top of the hill torque to spare. JMHO.
2007 ST Standard 96 C.I.
Last edited by Eagle Keeper; 03-20-2018 at 05:59 PM.
03-20-2018, 05:36 PM
Steve Cole's & $tonecold's Cam Testing
