V-Twin Forum banner
1 - 9 of 9 Posts

·
Registered
Joined
·
4,706 Posts
geoffreyt said:
Does any one run one of the LSR 2-1 Pro Stock ? What do you think of it? :unsure:
Are you thinking of putting these on a race bike? They are designed for high rpm performance.

I use the baffled version so I don't lose the low end torque for street riding. The baffled version is plenty loud, by the way. The internal baffle on mine is about 7" long with a 2" - 2.25" diameter straight through core. Not much baffling going on there but just enough for a street bike.
 

·
Registered
Joined
·
4,706 Posts
geoffreyt said:
I was wondering if the 2-1 style is much louder than the black hole? The Pro Stock REAL LOUD one.
The Black Hole was designed to be quiet and not lose too much performance.

The standard LSR 2-1 is the right pipe for the street.
 

·
Registered
Joined
·
4,706 Posts
arjonaut said:
I had thought that the point of the BH was to keep power up and keep noise down. Are you saying that the Black Hole costs power vs the LSR? If so, do you know how bad the loss is?

Joe
Maybe I should have stated it differently. I suspect that in a A/B comparison of a LSR vs. BH with the motor tuned properly to each, that the LSR will still provide better numbers. Maybe not by much but better nonetheless. Am I saying to stay away from the BH? No, I am not. If you want a quieter pipe that works well, I think this is the right answer but Geoffrey was wanting a loud pipe(the LSR Pro Stock), so the BH is not the right answer for him, it is the LSR 2-1.
 

·
Registered
Joined
·
4,706 Posts
deuce04 said:
The LSR 2-1 has baffles
It has a baffle. I described it earlier in the thread. About 7" long and somewhere between 2" & 2.25" diameter straight through core. It has perimeter louvers that look like tabs of metal sticking up from using an old style pointed can opener but somewhat more rounded. The tabs are towards the tail end of the pipe. See the thumbnail picture below.
 

·
Registered
Joined
·
4,706 Posts
geoffreyt said:
Totenkopf, how is it that you come to know this line of pipes so well and even have very nice pictures of the inside?
I'm using the LSR on my bike (it's listed in my signature list of modifications below). I've spoken with Bob, the owner/designer at RB Racing several times and I have pretty much gone through most of their website and sort of understand their product offerings.

Besides sounding great, I think they look great too!
 

·
Registered
Joined
·
4,706 Posts
Actually, I just recently installed the heatshields on the primary tubes and they fit really well. No unsightly gaps and the coverage was just right, in my opinion.

Kelly answered all the other stuff. Simpler mounting system than stock, my motor is a B or rigid mount.

One other comment, their chrome is fabulous. I've heard one or two other comments that their ceramic coating is susceptible to scratching but that would be true with chrome too.
 

·
Registered
Joined
·
4,706 Posts
geoffreyt said:
Maybe I have this wrong, but I figured the the air/fule ratio was pretty much a fixed deal unless you can get to the bottom of your carb to adjust it and on my XL it looks like you have to take off the carb to adjust it. What can you do every time you ride that this gague tell you? And thanks for putting up with my 20 questions.... I am very interested. I may order a set of 2-1 in a few days. I heard it takes a few weeks to get delivery and I would like to be ready for spring when it gets here
I have an efi bike and the SE Race Tuner software. So I can adjust fuel to my heart's content after noting different responses my motor gives under varying riding conditions observing the RSR AFR Gauge. The AFR Gauge has 10 led's all in a row that have 4 different color bands, Green, Yellow, Orange & Red. As I recall the end Green indicates 17:1 afr and the furthest Red is 12:1. Ideal afr for power during wide open throttle is right around 13:1. During cruise, you want around 14:1. There are cold idle and hot idle adjustments and transition fuel adjustments when you move the throttle open and closed. This is particularly nice for when my bike goes on a dyno and it's AFR sniffer is put up the tail pipe. We can compare data and see what is going on from 2 points of view. A carb bike has all of these same adjustments except instead of adjusting them with software, you make mechanical adjustments internally to get the responses you want. The LSR pipe comes with at least one O2 sensor port and you can order them with two, one in each primary tube. In my case, I have one port and it's in the front cylinder primary tube about 2" from the exhaust port. I used a generic Bosch single wire O2 sensor that works well for a single wire unit. If I were you, the first thing I would do is get the pipes you want, get the proper higher flow air filter and backing plate and get it dialed in by a knowledgeable tuner.

With regard to getting your 2-1, call and talk with the folks at RB to get their recommendation for your specific bike, if you have decided this is the pipe for you. When I ordered mine last August, it took 3-1/2 weeks to be made and delivered. Get the extra small head nuts they use, order the heat shields, and use the correct Permatex slip joint goo for the installation.

Good luck with your decision!
 

·
Registered
Joined
·
4,706 Posts
kelly said:
dern, Tot. Looks like yet another one is going to get a set. Dern.

So, how's the dialing in process coming? Drop the retard key and go with Andrews 44 yet? Can't say I agree with your dakota kid TB (so far) and I'm still anxiously awaiting what your numbers are and if you had to do it over--what would you admit to doing without? (Got settled in over in KS and looking to make a trip to either St Louey of Northern IL for some upgrades in 06--still playing around with performance numbers and $'s--more like procrastinating!). Happy New Year!
Hey Kelly! HNY's to you too!

I wouldn't disregard the DK TB! We've noticed a nice response in the MAP sensor readings at idle and WOT. It's hard to differentiate what the altered rocker ratio did versus the TB but certainly it didn't adversely affect anything!

I wouldn't change any of that but here is what I think might be next.........

I was out at Otto's shop yesterday and we've been talking about what to do next. He's of the opinion that even with his partial tune at WOT, that the HP is rising so nicely to my set rev limit of 6000 rpm, that we are now probably sacrificing a bit of power in the bottom end. He's now leaning towards putting the stock cam key back in and then finishing the tune.

Right now she's making approximately 102 ft-lbs and 95hp partially tuned and we have room to move yet, according to him. We have got to get on a dyno that works correctly and has an eddy current brake. Otto is considering buying a dyno as he really could use one in his business.

In the meantime, I'm looking at new wheels & tires, dual disc conversion up front and a Baker DD6 before springtime. ;) If I get all of that completed, I think I'm done! for now anyway.

Glad you are settled, if you get up this way, let me know.
 
1 - 9 of 9 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top