LO206 Carb Slide Opening Adjustment

Paw Fowler said:
When the cap is filed more at the back then the front and it is obvious I have to beleive that it was done intentionally???

The Briggs rules state "The only allowable method of slide optimization is by removing material from the throttle cap area highlighted in RED". Nothing says the material must be evenly removed on the whole surface that is highlighted in red. As long as slide opening passes the go-no, I don't see what your tech issue is!
 
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The problem is with the back of the slide failing. That is an area of the cap that can be ajusted legally but not manipulated???
 
The problem is with the back of the slide failing. That is an area of the cap that can be ajusted legally but not manipulated???

Not sure I follow. If it passes the no go, but is machined crooked, that is a tech fail? I've seen some pretty gnarly "home done" optimizations. If we are going to judge dads based on their ability to file that part flat, we are in trouble.
 
Even the Briggs pdf file that describes the throttle slide adjustments and checks does not support your tech procedure. The Briggs instructions state "The gauge must NOT be able to travel under the front lip of the carb slide at full throttle (maximum opening, when teched as diagramed above) assuring the throttle cable is at the top of its travel. If the Pin Gauge can travel under the carb slide at full throttle, or any of the conditions outlined above are compromised, a DQ could result". Nowhere does it discuss checking from the manifold side of the carb for the slide height. I would protest your tech procedure if you were to DQ my driver. Nothing personal but you can't just make up rules on your own! There are rules on some measurements on the venturi area that were even highlighted in red this year that include checks made on the outside and manifold side of the carb but there are no checks on the slide height from the manifold side.
 
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If you will watch the Briggs video (Using Slide Restrictor System) and then take the SOX restrictor tool in your hand you will notice on one side
there is a pin, on the other side of the tool you will find the gauge necessary to check the back side of the slide. PLEASE READ THE RULE BOOK
 
Show me where the rule is and the tolerances. I've read the rules multiple times and can not find it. Is this something unique to Canadian rules?
 
I have never heard of this rule where the back side of the slide can be an area of tech. The slide is in the carburetor and has a fairly tight tolerance in the vertical direction it travels. If you machine the carb cap at an angle does the slide really have that much room to "tilt" the back up anyway??
 
When the cap is filed more at the back then the front and it is obvious I have to beleive that it was done intentionally???
The slide is machined to fit in a relatively tight cylinder. If the cap isn't evenly filed, but the slide test conforms to the associated tolerances, and the no-go doesn't enter under the slide on initial entry via the airhorn, move on to the next test. We can 't have an opinion (as Brian shared above) under the tech tent. Aside from the idea that MAYBE air could enter through the filed cap, and we can test for that, sticking w/ the rulebook keeps us off of the slippery slopes.
 
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Up here in the Great White North we use a 1 thou. over no go in teck. If you use a .570 gauge to set your slide you will not pass teck.
Please read the Brigg's rules first & watch there video too. I would use a .566 pin gauge & losen the top until the gauge slides in, tighten
the top down until you feel resistence, lock down the top & check with the .570 gauge. The .570 should not go in.
So Briggs says it’s legal to be = .570 (yellow) but track tech says anything < .570?
 
≤ .570 meaning anything over .570 ?
I would not try to make it .570 or .569 .
It would be best to be at .566 as stated .
Is .004 really worth that much horsepower or a D Q .
The tech person has the final say . Just because you measure it at .569
At home or in the pit . What really matters is in the tech shed .
 
The .570" is NO-GO. I'm not sure how "your track" is teching this area, but it's not that difficult.
The Sox tool checks both the front and back of the slide, and yes, it is slightly larger than .570" which actually gives the competitor a bit more margin to work with.
I have not seen a cap filed so crookedly that one side passes the test and the other does not.
I suspect something else is happening here - loose cap, slide bore enlarged, something more than just filing the cap crooked.
I have made a video of how I check the slide opening with the Sox tool, and how I set the slide height using the pin gauge. It's really straight forward I think, but perhaps we need to better clarify how to use any no-go gauge.

It is the competitor's responsibility to make sure that they are legal.
The tech man's responsibility is to make sure that the competitors are doing their job correctly. :)
 
Where can we purchased these tools to measure
They were available from Charlie Sox. I don't know if they have any in stock or not. Jimbo also made had some tapered pins made for the different slides. You can purchase pin gauges from MSC, Enco, Grainger, Travers Tools, etc.


-----
🏁Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cutz
www.CarlsonMotorsports.com
Carlson Motorsports on Facebook
33 years of service to the karting industry ~ 1Cor 9:24
Linden, IN
765-339-4407
bcarlson@CarlsonMotorsports.com
 
They were available from Charlie Sox. I don't know if they have any in stock or not. Jimbo also made had some tapered pins made for the different slides. You can purchase pin gauges from MSC, Enco, Grainger, Travers Tools, etc.


-----
🏁Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cutz
www.CarlsonMotorsports.com
Carlson Motorsports on Facebook
33 years of service to the karting industry ~ 1Cor 9:24
Linden, IN
765-339-4407
bcarlson@CarlsonMotorsports.com
You have a link for Charlie Sox?
 
Here's a link to the video I was talking about. I finally got around to creating a youtube channel and posting, etc.
Sorry it's not production quality, edited, and all that stuff. Basic information, but hopefully it answers more questions than it creates.
This video shows how to tech and set the restrictor slide height in the 206 classes. My tech seminars do a better job with hands-on and plenty of question and answer time available.


-----
🏁Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cutz
www.CarlsonMotorsports.com
Carlson Motorsports on Facebook
33 years of service to the karting industry ~ 1Cor 9:24
Linden, IN
765-339-4407
bcarlson@CarlsonMotorsports.com
 
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