Low End Torque
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Low End Torque
Riding a new '13 Streetglide bone stock except for V & H slip ons. Would removing the catalytic converter and doing a stage 1 upgrade improve low end torque 2000-3000 range? I'm not racing anyone, my shift points are usually in the 2000-2500 range,and I think the stock HD engine is factory tuned for torque in that range, so I just wonder if its worth the bother and $$$ of doing the swap.
How much exhaust pressure does the cat conv produce, and will it help much to remove it?
How much exhaust pressure does the cat conv produce, and will it help much to remove it?
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Joined: Jun 2006
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From: san antonio
Riding a new '13 Streetglide bone stock except for V & H slip ons. Would removing the catalytic converter and doing a stage 1 upgrade improve low end torque 2000-3000 range? I'm not racing anyone, my shift points are usually in the 2000-2500 range,and I think the stock HD engine is factory tuned for torque in that range, so I just wonder if its worth the bother and $$$ of doing the swap.
How much exhaust pressure does the cat conv produce, and will it help much to remove it?
How much exhaust pressure does the cat conv produce, and will it help much to remove it?
Fullsac makes a replacement X-pipe; check it out. It will accept OEM heat shields and mufflers. You have decent slipons, just need to add a free flowing A/C and a fuel management system for tuning. I know, mo money; it's called the "Harley tax". Worth the expense though, you will be happy with the results. A Stage I upgrade, with a good tune, is probably the best performance bang for the buck available. A set of bolt in cams would be next. From that point forward, the additional TQ/HP gains start to cost more on a unit cost basis.
There are other systems similar to the Fullsac hardware but the Fullsac package may be the most cost effective for an OEM to Stage I upgrade.
http://www.fullsac.com/sleeper-kit-110.html
A 2-1 header is the best way to improve low end torque with a pipe upgrade, if you can get over the looks of not having duals.
I agree, I wouldn't remove the cat. seen to many botched threads with the welds cracking and opening up or not sealed properly the 1st time, stainless isn't the easiest to weld.
I agree, I wouldn't remove the cat. seen to many botched threads with the welds cracking and opening up or not sealed properly the 1st time, stainless isn't the easiest to weld.
Last edited by GaugeMods; Apr 30, 2013 at 03:13 PM.
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Riding a new '13 Streetglide bone stock except for V & H slip ons. Would removing the catalytic converter and doing a stage 1 upgrade improve low end torque 2000-3000 range? I'm not racing anyone, my shift points are usually in the 2000-2500 range,and I think the stock HD engine is factory tuned for torque in that range, so I just wonder if its worth the bother and $$$ of doing the swap.
How much exhaust pressure does the cat conv produce, and will it help much to remove it?
How much exhaust pressure does the cat conv produce, and will it help much to remove it?
Install either a Wood 222, or an Andrews 48.
Either one will REALLY pump up the low-mid torque.
Scott
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Joined: Jul 2011
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From: New Braunfels, Texas
[QUOTEA 2-1 header is the best way to improve low end torque with a pipe upgrade, if you can get over the looks of not having duals.
I agree, I wouldn't remove the cat. seen to many botched threads with the welds cracking and opening up or not sealed properly the 1st time, stainless isn't the easiest to weld.
__________________][/QUOTE]
I agree and then open up the A/C and have it tuned. If thats not enough put a different sprocket on it
I agree, I wouldn't remove the cat. seen to many botched threads with the welds cracking and opening up or not sealed properly the 1st time, stainless isn't the easiest to weld.
__________________][/QUOTE]
I agree and then open up the A/C and have it tuned. If thats not enough put a different sprocket on it
Club Member
Joined: Jun 2007
Posts: 45,429
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From: Bedford UK
You're changing gear too early. Your engine will thank you for raising your gear change points, I really do recommend trying it. You can routinely run to 5k instead of 2,5k, although obviously won't need to every time. However Scott has vast experience in adding more go, so his tip is very well worth following!
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Stellar HDF Member
Joined: Aug 2012
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From: Indiana, USA
I have had 2 new Limited's in the last 2 years. The first I lefta lone for a couple months and decisded to change the headpipe to remove the cat only after suffering through several 70 degree F rides with my right thigh overheated. The removal of the cat will reduce heat and not really change the performance of the bike, I purchased the V&H Power Duals
On the '12 I added a K&N airfilter and V&H Monster Rounds and Dynojet Power Commander V. There was a big difference in the torque and horsepower with this simple modification and the heat issue went away.
On the 13 I purchased the SE Stage I Air Cleaner and backplate assembly, transferred my V&H Power Duals and Monster Rounds to the new bike, Installed the Power Commander V and loaded the Stage I program. I would say maybe a 2% increase in TQ and HP over the stock air cleaner and backplate.
On the '12 I added a K&N airfilter and V&H Monster Rounds and Dynojet Power Commander V. There was a big difference in the torque and horsepower with this simple modification and the heat issue went away.
On the 13 I purchased the SE Stage I Air Cleaner and backplate assembly, transferred my V&H Power Duals and Monster Rounds to the new bike, Installed the Power Commander V and loaded the Stage I program. I would say maybe a 2% increase in TQ and HP over the stock air cleaner and backplate.
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Joined: Jun 2006
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From: san antonio
I would agree with he town; your shift points border on lugging. The H-D twin actually likes to spin; give it a try. The other suggestions are good but you really should adjust your shift points; the motor will like it.
