[trunknuts]

Anyone use a Super Trap on their R1 swap? I'm using a Magnaflow exhaust which I think might be too free flowing. I was thinking of replacing it with an R1 slip on exhaust, but just started reading about this "tunable" exhaust. Any info will be greatly appreciated. Thanks in advance.

 

[RuttingRhino]

I used one on my Alba exhaust on my ported 686...

I wanted to see if I could knock down the noise on the hushpower muffler...

I was able to take enough plates out to get significantly lower noise level at idle w/o hurting power...no gain...no loss...

But as soon as you crack the throttle it was loud as ever...

Removing more plates started cutting power...

Don't know if that helps you any or not...

 

[trunknuts]

Well, noise isn't really the issue for me. Actually, the louder the better. I've noticed that my AFR runs a bit lean, but when I block the exhaust a bit it richens up. I've had to modify my fuel map using the Power Commander, but I was told that's just a "band-aid" and that I should consider adding some restriction to the exhaust. I've just never "tuned" an exhaust before.

 

[RuttingRhino]

I definitely tuned the exhaust and re-optimized the a/f with every change that affected a/f...

removing plates that made no change in a/f resulted in no change in power...changes in a/f that resulted in loss of power were not due to a/f changes...

So my goal was to make it less noise but I was definitely tuning for power and correcting the a/f...

The one thing I did not do was tune the exhaust to correct the a/f...

IMO...that is not the right approach...not saying it won't give the result you want...

If it were me I would try it and tune it for max power...making sure the a/f was optimized for each setting...

Motors are very different...mine was a Racer's Edge AZ ported head with +1 valves and cam...results would have been different with stock motor...porting, valves, cam are more appropriate for a more restrictive exhaust...

So I believe that your power vs exhaust flow curve might be different if you motor is stock and came from the factory with very good power with a quiet exhaust...

Not sure what you have done to your R1...

 

[WildEarp]

I wouldn't run a super trap. Way to restrictive. The R1 needs to flow.

A power commander isn't a bandaid. Its the only way to properly adjust AFR on a motor thats been modified from stock. All the R1s on the street (still in a bike that is), run either PowerCommander or Bazzaz. If your running lean, that means your flowing more air than stock, which is good, that means more power. You just need to add some fuel to make up for it. Go for 13.1:1 AFR at WOT.

 

[trunknuts]

Thanks Ben. I have it set for 13.1 all across the board. I don't really know who to fine tune. I need to copy your table. lol

 

[WildEarp]

How do you know your lean?

 

[trunknuts]

Before I made my adjustments to the PC, I was idling at around 14.5~15.5 AFR. When riding, it seems between 3,500 and 6,000 RPM AFR jumps between 14 ~ 16.1 AFR. Past that RPM everything seems well. Oh, and I have an AEM AFR gauge.

 

[WildEarp]

What are you in the upper RPMs at WOT?

Idle should be around 12.5 I think. thats the easiest to fine tune (don't think the auto tune will adjust idle though).

14-16 while cruising (very light throttle) is fine, but not for more than about 1/4 throttle. You should be at 13.1:1 then.