New WKA SR-Y pipe test

Kent Laukaitis · Posted: Tue Nov 13, 2012 11:37 am Post subject: New WKA SR-Y pipe test

Guys,
The weather here in Illinois was great on Friday so my son Matthew and I were able to go to Midstate kart club and test the new pipe and compare it to the existing ssx can. Our lap times are right around 33 seconds with a can. Once we established a good baseline with the can, we simply unbolted the can and bolted on the pipe at 9 5/8 flex length. Adjusted carb and headed back out. Matthew came in and said it was a fun ride with lots of bottom end but not a lot of top end. Went about .8 to .9 faster. So can went 33.0 to 33.1 and pipe went 32.2. Did nothing else. Tried adding teeth but really didn't gain on the watch. RPM's on the can were at 13900 to 14000 and when we bolted on the pipe RPM's went up to 14300 to 14400. Clutch went up about 200 RPM's which is right where it needs to be. Peak torque on my dyno says 9000. we never slipped it any higher and when we came in off the track, the clutch seemed cooler than with the can. Guessing it locks up quicker and has more time to cool.
One thing I should mention is we tried gearing it up so the engine turned almost 15000 and no gain. Adding flex length did seem to help.

I am writing this so if you are going to Daytona and don't have time to test, you can have something to start with. If you have any more questions pertaining to the pipe, call me at my shop and I will be glad to share any info I have. If you haven't seen the pipe yet check out a picture of the kit on my website.
We also threw on the .750 filter cup, adjusted the carb and tested it. It was approx. .8 to .9 slower than the normal can setup and really lacked top end. RPM's went down to 13500 with same gear. 11-82

www.laukaitisracing.com

Thanks again and just trying to be helpful,

Kent Laukaitis
Laukaitis Racing
Laukaitisracing.com
217-877-8877
gnckent@yahoo.com

Dan Schlosser · Posted: Tue Nov 13, 2012 1:31 pm Post subject:

Did you go back to the Can when you put the smaller filter cup on Kent?

Kent Laukaitis · Posted: Tue Nov 13, 2012 1:41 pm Post subject: pipe

Dan,

Yes we went back to the can. Ran it the same way the juniors will be running it at Daytona. Really had to lean the carb to get it to run. I think it was 1 low and off or just cracked on the high. Once we adjusted the carb, it ran pretty good. Anything richer and it would not leave the pits.

Thanks
Kent

Ray Mcik · Joined: 26 Mar 2005 Posts: 531

Kent Laukaitis · Posted: Tue Nov 13, 2012 3:58 pm Post subject:

Ray,

33.1 seconds with the can and 32.2 with the pipe. Pipe was faster by about .9. I made it hard to read. The main thing I was trying to get across is we simply bolted it on and it ran very well. Did have to change the carb settings but used the same complete package as with the can.

Thanks
Kent

Ray Mcik · Joined: 26 Mar 2005 Posts: 531

Thank you Kent, I went back and re-read it...ooops Laughing

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Dan Schlosser · Posted: Tue Nov 13, 2012 4:41 pm Post subject:

Thanks Kent. All at the same weight - 330 I assume?

Pipe at 330# - 32.1 seconds
Can at 330# - 33.0 seconds

With .750 Cup:
Can at 330# - 33.9 seconds

(Plus or minus a tenth or so)

Kent Laukaitis · Posted: Tue Nov 13, 2012 4:46 pm Post subject:

You are correct Dan. Very close to 330.

Dan Schlosser · Posted: Tue Nov 13, 2012 5:32 pm Post subject:

So in reality we are probably looking at a half second quicker at 305 pounds for the Juniors. Or a 1.2-1.5 second step from Junior to Senior at that track.

Very helpful Kent. The weather is taking a turn for the better here this weekend and we are going to open for practice again so we are going to try to line up some similar testing. Will report back what we find as well.

Anthony DePalo · Posted: Tue Nov 13, 2012 6:22 pm Post subject:

Got a chance to run a friends kart with the new pipe and I found it better coming off the corners and it pulled good to the mid straight then fell off. We had 2 teeth less than the can and hit 14700. It was about a second faster on a track with 44 second lap times. Didn't play with the clutch. Not bad at all, think drivers will like it, I did.

patrick slattery · Posted: Tue Nov 13, 2012 6:23 pm Post subject:

Kent, good information, but I would bet if you dropped 3 teeth with the pipe you will go even faster. Our dyno, with an unmodified Woltjer SSX can setup had the peak torque at about 8.3. J

Also some test at Camden last Saturday, showed 2.1 - 2.3 seconds slower with and without the filter cup, and complaints of no top end also.

Matthew Laukaitis · Joined: 15 Sep 2007 Posts: 13

The new pipe definitely was a fun ride. I think its going to be an interesting addition to the Manufacturer's Cup this season. In my opinion this was a good addition because when a person turns 15 they shouldn't have to go slower than when they were in Jrs.

I'm not so sure on the smaller filter cup for the jrs though. Because i was lucky enough to get out on the track and try all three variances. Just my opinion but there most likely will be a riot when all of the Junior drivers find out what they are up against.

I have talked to a few jr drivers and shared the information with them that i find out that day, and they looked like they saw a ghost when i told them the lap times compared to what they used to run all last season.

I guess time will tell.

Matthew Laukaitis

Frankie Schaffier · Posted: Wed Nov 14, 2012 11:05 am Post subject:

In my opinion Kent and his son Matt did an excellent job in providing back to back numbers, thanks to you both.

Senior Pipe... Club level question.

Now knowing that the current motor set ups can run either the new pipe or the current can, in their current configuration without throwing $100 bills at the motor. And also knowing that the new SR-Y pipe is quicker to a degree, in Kent's example just a notch under an second, it may be more or less depending on the track and conditions. I know it's early yet, but lets use the above info for a base line for my question below..

Clubs are on the fence to make the change due to cost of the new pipe, with some clubs already making the call they won't switch. Two of the last things needed in karting today is one, another class and the second to dilute the already existing entries. What if at the club level both pipe and can are allowed to run together, giving the can folks some time to buy the new SR-Y pipe along giving the guys with the new pipe some place to run local?

In doing that, weight would need to be either added to the pipe drivers, or a weight break giving to the folks running the can. Just guessing, I'd say somewhere in the 10 pound range for a weight difference between the two. More testing would need to be done to nail the number, but let's use 10 pounds for the discussion.

Thoughts?
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Frankie

Comet Eagle
Emmick Elite-Parilla TT25
Burris Racing www.burrisracing.com
Stoney Creek Motorsports

Kent Laukaitis · Posted: Wed Nov 14, 2012 12:09 pm Post subject:

I am not sure that 10 would be enough. Testing is the only way!!!! I don't however think that trying to run the new pipe and can together will work. Such as in the past, different engines have never worked together because one is always faster than the other at certain tracks. Its a good idea but it would take alot of testing to even get it close.

Just my thoughts,
Kent

Ray Mcik · Joined: 26 Mar 2005 Posts: 531

Frankie , do we really want to deal with adjusting weight issues that Tag has faced over the years ?
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