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I did some Dyno Testing of stock mufflers vs. drilled with and without a Fueler. I'm at home right now so I don't have the Dyno Charts to actually post, but here's some numbers to contemplate;
All Stock 82.1 HP, 70.7 TQ
Drilled Mufflers 84.4 HP, 71.5 TQ
Interestingly there is a LOSS of torque between 3050 rpm and 3600 with the drilled mufflers and stock Fuel curve. the sound is very Triumph or Norton like with the 3/4" holes, I like it.
We ran the stock mufflers with our Top Fueler, this is actually made for us by Dobeck Performance (the guy who invented & owned Dynojet).
The peak torque didn't change and the peak HP went up .7 More importantly the torque from 2500 to 3250 went up a little as did HP from 5500 on up by a couple. Much smoother from 2500-3500 rpm.
Drilled Mufflers with the Fueler. The Peak HP was the same as without the Fueler at 84.4, peak TQ was 72.1. The important thing here is Torque at 2500 was up 4-5 Ft lbs and it basically gained 2-4 all the way through the power band. The same was true for the HP.
Now some interesting notes. The Top Fueler was run "Out of the Box" which comes actually optimized for the standard 1200 Sporty. Unfortunately the A/F Sensors in the Innovate Motorsports meters on the Dyno went a bit haywire after about our 15th run so we decided to hold off "Tuning" until we could get them re-calibrated.
The stock bike showed readings of approx 14.7 around 4000 rpm to 13.3 at 6750, with a very lean 18.3 at 2500 when the throttle was whacked to start the run!
The fueler as delivered was 13.6 at 2500 when whacked (showing that our "accelerator mode" was working well, and that is where we saw the largest power increases) to 14.0 at 4000 and 13.0 at 6750, which tells us that we need to do some adjusting to get a bit more power out of the bike.
We will do some more testing soon, when the A/F meters get sorted out.
The other interesting thing was we monitored Oil Temp and Cylinder head temp. Between the stock fuel curve runs and the Top Fueler runs we only saw about a 5 degree drop in both temps! Granted the Superflow Dyno has very good Air Flow with fans that blow air at the motor that increases with the "Road Speed" of the run but that actually simulates what happens on the road.
As soon as I can get it back on the Dyno I will tune it for 12.5-13.3 across the board and see what we get, we are expecting, based on experience, to see another 3-5 HP and Ft Lbs across the board.
All Stock 82.1 HP, 70.7 TQ
Drilled Mufflers 84.4 HP, 71.5 TQ
Interestingly there is a LOSS of torque between 3050 rpm and 3600 with the drilled mufflers and stock Fuel curve. the sound is very Triumph or Norton like with the 3/4" holes, I like it.
We ran the stock mufflers with our Top Fueler, this is actually made for us by Dobeck Performance (the guy who invented & owned Dynojet).
The peak torque didn't change and the peak HP went up .7 More importantly the torque from 2500 to 3250 went up a little as did HP from 5500 on up by a couple. Much smoother from 2500-3500 rpm.
Drilled Mufflers with the Fueler. The Peak HP was the same as without the Fueler at 84.4, peak TQ was 72.1. The important thing here is Torque at 2500 was up 4-5 Ft lbs and it basically gained 2-4 all the way through the power band. The same was true for the HP.
Now some interesting notes. The Top Fueler was run "Out of the Box" which comes actually optimized for the standard 1200 Sporty. Unfortunately the A/F Sensors in the Innovate Motorsports meters on the Dyno went a bit haywire after about our 15th run so we decided to hold off "Tuning" until we could get them re-calibrated.
The stock bike showed readings of approx 14.7 around 4000 rpm to 13.3 at 6750, with a very lean 18.3 at 2500 when the throttle was whacked to start the run!
The fueler as delivered was 13.6 at 2500 when whacked (showing that our "accelerator mode" was working well, and that is where we saw the largest power increases) to 14.0 at 4000 and 13.0 at 6750, which tells us that we need to do some adjusting to get a bit more power out of the bike.
We will do some more testing soon, when the A/F meters get sorted out.
The other interesting thing was we monitored Oil Temp and Cylinder head temp. Between the stock fuel curve runs and the Top Fueler runs we only saw about a 5 degree drop in both temps! Granted the Superflow Dyno has very good Air Flow with fans that blow air at the motor that increases with the "Road Speed" of the run but that actually simulates what happens on the road.
As soon as I can get it back on the Dyno I will tune it for 12.5-13.3 across the board and see what we get, we are expecting, based on experience, to see another 3-5 HP and Ft Lbs across the board.