TORQUE CONES

[chaserband]

Okay I am putting a set of ripsaws on my sportster 1200...should I put the torque cones in the pipes or should I just put on the pipes. I was told If I put the cones in I will have to send the bike to the dyno to see what cones need to be used? I am also putting a se hiflow breather and a yost power tube in...do I really need to dyno the bike?

[chaserband]

Or should I use the samson performance rings?

[Luckymic]

Are you using baffles in the new pipes? I'd say yes use the torque cones if your not going with baffles. Are you just going to dyno the bike, or are you going to have it dyno tunned? Having it dyno tunned will cost alot more, but you can make sure your getting everything out of the motor that you have into it. Just my .02 worth.

[chaserband]

No the rip saws have no baffles because of the curve at the back of the pipe. the do make a performace ring that looks a lollypop in the end of a drag pipe.

[stevo]

guess it depends on wether ya like suckin on lollipops or cones ;)


Try both and see which is best with your combination

[chaserband]

Well I let the ol lady do the suckin. but she won't let me have what I think is the best combination...Now back to the pipes. I think the performance rings will be the first try!!!

[CuL8R]

I didn't want to be the one, but oh well, here goes.

What is a torque cone and how does it work?

[Shu]

A torque cone is a restrictive type plate that is installed between the pipes and the heads. Some have felt they help regain some of the torque loss (by increasing back pressure) when running pipes without baffles.

[CuL8R]

A torque cone is a restrictive type plate that is installed between the pipes and the heads. Some have felt they help regain some of the torque loss (by increasing back pressure) when running pipes without baffles.

MISSYD from a diffrent thread said,"I then had a torque cone welded into the muffler and the torque came back at low rpm's."Here is a link to that thread (http://www.xlforum.net/forums/showthread.php?t=1325)

So do they atatch between the pipes and the heads or do they go in the mufflers?

[skooter]

Torque cones get pinched between the exhaust port and the pipes. You drop them into the end of the pipe at the cylinder head end and them install the pipes into the exhaist ports. A shoulder on the cones keeps them in place. They do work but I'm not sure how well compared to a better tunable exhaust set up. The difference between cones and no cones in an open unbaffled exhaust system is suposed to be very noticable. I can't tell you because I never ran my unbaffled drag pipes without the cones. I'm happy with the performance but I'm not as paricular about HP output or engine performance as some are.

[xl1200r]

So would this mean if I was using a Supertrapp disc muffler that a tourque cone would be of no benefit?

[skooter]

That would be a good question for someone who understood exhaust tuning better. I thing the supertraps you are talking about are tunable. If they are than why would you use the power cones? That is just my opinion but I have no experience with those exhaust systems our that level of performance tuning so don't take my word for this. Maybe someone who has more knowledge in this area will answer you better.

[chaserband]

Yes I know how both work ..... but I was wondering if anyone has used the performance rings in stead of the power cones .... all your really doing is adding some backpressure to the pipes for an equal intake and exhaust of gases. My question is this p-rings are $34.00 and p-cones are $65.00. What is the advatage of the cones over the rings. The cone is in front of the pipes and the rings are installed in the end of the pipe where the baffle should go.

[xl1200r]

I do know this...

A tourque cone is installed between the head and the header pipe. In addition to making a little more backpressure, it also make a smoother trasision into the pipe. Normally, the port is a little smaller than the pipe, so it just steps open more, but the cone will gradully make the area larger.

[stevo]

torque cones 101

G'day guys.

One of the reasons that the torque cones work well on drag pipes is because the signal is stronger....
Because there is no baffling of any kind in the the way when the exhaust pressure wave reaches the open end it sends a negative pressure wave back into the pipe.
These waves are called "Finite Amplitude Waves" .. and they are thousands of times stronger than sound waves.

With recent events imagine them being the Tsunami wave (very similar scenario from my understanding)...where the force is transmitted thru the medium (water instead of air).
The water is not pushed all the way but rather the pressure wave travels very fast and then when it reaches the end the force is seen.

IF this pressure wave arrives back at the open exhaust port at the right time then a low pressure area is created which helps scavenge more gas and can also flow thru on large overlap cams into the intake to help with in starting the charge moving.

(again the Tsunami, where if the trough arrives first then the water recedes from the beach BEFORE the wave hits)

HOWEVER ya get nothin for nothin... this same wave that can make you power can also cost you HEAPS...
If it arrives back at the wrong time it can totally stuff your exhaust/inlet tuning.
I've seen real bad fuel stand off on drag pipes..

(again imagine the high pressure ariving first...or the crest of the wave...tidal wave)

The torque cones help take the edge off the reversion wave and can make a bad set up better in the mid range...typically in the bad drag pipe area which is under 4500 rpm.

If an exhaust has a baffling system in it or a diversion section (as in 2-1) then the return pulse is not a strong and the torque will not have as much if any effect.

The lolloipop idea is better in most instances as it allows adjustability to tune your bike for your conditions.

[chaserband]

Thank you for all your help guys...I believe I am going to try the open ripsaws first if it is robbing me of to much power we will end up putting the performance rings in the baffle area. Again thanks to all of you who have helped me with this project ...will send pictures as soon as project is done!!!