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Another satisfied Fuel Moto customer. Thank you Fuel Moto. Steve
Wow, very impressive.... 34% HP increase and 16% TQ increase. This is looking to be at the top list of performing cams in my opinion available for the M8. What cam is giving higher Tq and Hp numbers (no other upgrades besides a 2 into 1) ?
That's a huge drop in torque at 3200 rpm and below. I would not like that as I am in that rpm range a lot. Probably caused by the exhaust.
Here is another graph with the same cam and different exhaust.
That's a huge drop in torque at 3200 rpm and below. I would not like that as I am in that rpm range a lot. Probably caused by the exhaust.
Here is another graph with the same cam and different exhaust.
Touring models have the benefit of much longer primaries and a more optimum placed collector than the shorter Softail pipes, the shorter pipe designs have have the probability to create the dip in the lower part of the curve as seen in this chart above however the lighter Softail accelerates strong thru this area and comes up on the power quick; in this example and many similar combinations we've tested the dip cannot be felt, the bike pulls strong and hits hard.
Touring models have the benefit of much longer primaries and a more optimum placed collector than the shorter Softail pipes, the shorter pipe designs have have the probability to create the dip in the lower part of the curve as seen in this chart above however the lighter Softail accelerates strong thru this area and comes up on the power quick; in this example and many similar combinations we've tested the dip cannot be felt, the bike pulls strong and hits hard.
Yes, you can zip through this torque dip in first gear and stay above 3500 rpm when shifting. I don't ride that way often.
The longer 2:1 pipes from S&S, D&D, and V&H are good options to avoid the torque dip.
The Softail D&D, S&S, and most others aren't much different as they all are compromised by the chassis. We just did a 114" Softail with S&S 475 cam yesterday with a bigger dip than this example, cannot feel that dip seat of the pants either.
The Softail D&D, S&S, and most others aren't much different as they all are compromised by the chassis. We just did a 114" Softail with S&S 475 cam yesterday with a bigger dip than this example, cannot feel that dip seat of the pants either.
That's odd that you can't feel the torque dip. A quote from your exhaust article explaining the torque dip: "Your looking at a difference as much as 20Tq in the lower RPM’s, throttle response is also poor. Riding the bike seat of the pants difference is night and day"
I suppose a lighter bike lets a person ignore the dip to some degree, but it is still there.
I don't understand why the Softail chassis compromises the design of a 2:1 exhaust system?
That's odd that you can't feel the torque dip. A quote from your exhaust article explaining the torque dip: "Your looking at a difference as much as 20Tq in the lower RPM’s, throttle response is also poor. Riding the bike seat of the pants difference is night and day"
I suppose a lighter bike lets a person ignore the dip to some degree, but it is still there.
I don't understand why the Softail chassis compromises the design of a 2:1 exhaust system?
A short answer is you're comparing info from an article we posted about oversize baffles vs an exhaust system where the primaries/exhaust system is too short, while they both compromise performance in one way or another different effects & physics are coming into play. I'm not at all sticking up for this customers pipe (we even discussed our concerns before we even booked his appointment), the bike was brought to us to install the cam & tune, we made the best of the combination and he's very happy with the overall results. Not everyone looks for the same curve or has the same riding style.
Power wise consider the 114" Softail we're discussing here is still making north of 110Tq in the lower RPM's thru the dip in the curve, that's still 10-15Tq more than a stock bike in that RPM region. .
As far as the chassis, you simply have much less available length for packaging (both primaries & muffler) on the Softail vs the Touring chassis so you are left with compromises inherent to the shorter systems.
Jamie, would you recommend the 22xe for someone who already has the 22x installed? I saw a dyno recently comparing the two and the top end difference was enough to get me thinking.
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