True dual performance

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Aug 29, 2019 | 09:59 PM

handirifle

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From: Kalifornia

True dual performance

Let me state upfront I do not have a big twin, yet! But I often read of someone installing true duals. Is there a performance hit or gain when making this switch, from a system with a built in crossover?

Is a 2-1 the best power producer for big twins like it seems to be for sportsters?

Aug 30, 2019 | 03:12 AM

CGLTD

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From: .

Quote:

Originally Posted by handirifle

Is there a performance hit

inherently, yes, not by very much from what I can "feel"

Quote:

Originally Posted by handirifle

or gain when making this switch, from a system with a built in crossover?

Quote:

Originally Posted by handirifle

Is a 2-1 the best power producer for big twins like it seems to be for sportsters?

yes but don't know if "like a Sportster.

Last edited by CGLTD; Aug 30, 2019 at 03:14 AM.

Aug 30, 2019 | 03:18 AM

shrekmoose

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From: tn

It also depends on how you ride the bike. Are you cruising around and wanting the botttom end torque to pass without shifting? Or are you like me and riding the fire out of it in the top half of the rpm range. I’ve found the duals suit me better than a 2-1 for my style of riding as they seem to breath a little better up top. But the low end lost is hardly noticeable and it’s still very easy to just putt putt around and cruise.

Aug 30, 2019 | 05:41 AM

grbrown

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From: Bedford UK

I've had true duals and a 2-into-1 on my Glide and had both set up on the same dyno. by the same operator. The headline numbers were very close, so if comparing max HP and max TQ there was little to choose between the two. The difference is that the 2-into-1 system gives significantly more low/mid range torque, for the rev range many of us normally ride in, but the unexpected bonus is how much smoother running my bike is with the 2-into-1. That alone is worth the swap, with the better rideability and comfort. I have no plans to change!

Aug 30, 2019 | 06:54 AM

Notgrownup

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From: Snow Hill, NC

I like the 2in1 the best of the 3 set ups I’ve had. The low to mid power is very nice to have. The highway passing power is the best I have ever had.

Last edited by Notgrownup; Aug 30, 2019 at 06:57 AM.

Aug 30, 2019 | 10:09 AM

handirifle

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From: Kalifornia

Great thanks guys. Experience is always the best.

Aug 30, 2019 | 03:43 PM

Vernal

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From: Utah

Check out the dyno charts and I think all your questions will be answered. https://www.fuelmotousa.com/p-33193-....html#rushmore

I had V&H Dresser Duals on several bikes then switched to Power Duals. I like the power duals but if I ever change exhaust again I'll look for a 2:1.

But the charts above take the guesswork out of the equation.