Robbins Racing

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@TheSpeedracer1982 2 күн бұрын

How much does the 206 refresh usually cost. Out here in Tooele

@tylerquance4346 5 күн бұрын

You installed the weights backwards from how they came out. Which is correct?

@robbinsracing801 4 күн бұрын

You can run them either way. Leading or Trailing shoes. I just put them back on the hub to store everything together.

@casual35 5 күн бұрын

Why not put the weights on the opposite side of the engine but on the frame?

@robbinsracing801 5 күн бұрын

Easier to mount to the seat. If you have a way to securely mount to the frame you could but it's very common practice to mount to the seat in go karting.

@Digitalfiendscom 6 күн бұрын

Interesting results. Sort of supports the idea that a faster opening of intake valve (although delayed) may cause more air to be drawn into the cylinder even with the shorter duration of opening. Odd to see the dip in HP @.004. How many pulls do you do for each lash setting? It will be interesting to see how the exhaust lash settings affect the overlap and torque.

@jeffbarbara9188 6 күн бұрын

thank you

@StevenonCouch 7 күн бұрын

You and #514 out there putting on a show. Awesome finish line photo.

@jcann313 9 күн бұрын

Could be vapor lock. You got the fuel pump right on top of the head don't you? Probably building up heat and vapor pressure. You never know though until you find it.

@joelkart8772 13 күн бұрын

Hi! Are you on Instagram? Or Facebook? I would like to write to you in private message.. Do you have a project of your test bench?

@bryanlarson3627 14 күн бұрын

I will definitely attest that this engine is not down on power! Love racing with you guys!

@pdpate3 14 күн бұрын

Love these videos. They are so detailed. Keep them coming. Thank You!

@davegaetz620 18 күн бұрын

What brand of grease do you use?

@robbinsracing801 15 күн бұрын

Maxima Waterproof Grease

@phmiii 20 күн бұрын

I like to replace the "washer" shack-up with an aluminum bushings made to the same dimensions.

@robbinsracing801 19 күн бұрын

I use faster adjusters on our seat now.

@phmiii 19 күн бұрын

@@robbinsracing801 That is very cool!

@Digitalfiendscom 21 күн бұрын

This is great stuff. I've been really looking into optimizing my engines beyond the usual (float, clip, etc) and lash was one of the things I've been experimenting with. Thank you for sharing this. I've been doing some research (some of it from your posts on 4cycle and here) and it seems that there are two benefits to lash: increasing lash increases rate of opening of the valve, which can increase power; and changing valve overlap can move the powerband around. I tested this awhile back with my local tuner and we noticed that increasing intake lash noticeably increased torque but shifted the powerband to the left and we lost some horsepower. If I understand correctly, increased intake lash can *reduce* overlap because the intake valve doesn't open as soon as it normally would when the exhaust valve is closing, effectively reducing overlap. Out of curiosity, when you ran the tests for 0.06 and up, your AFRs shot up to near stoich. Would this be because the exhaust valve is opening later and i.e. allowing for more complete combustion?

@robbinsracing801 20 күн бұрын

YO thanks for the comment!! I also noticed the AFR change. I think it would be what you stated, maybe a fraction more amount air getting into the camber due to it opening later?? I think we'll learn a bit more once I get the lash testing done when I move just one at a time.

@robbinsracing801 19 күн бұрын

Sooooo, the Lamba went to 1.0 because the sensor died while doing the tests. Just finished tuning an IAME Mini Swift and had to replace the sensor.

@phmiii 21 күн бұрын

I like "dials" because there batteries do not go dead.

@HarjitSi 23 күн бұрын

Thank you for doing this test and for doing it methodically. I look forward to the tests where you hold the intake constant while changing the exhaust (or vice versa). A request - any chance you have multiple runs with the same engine settings? I'd like to know what is the run to run variability so that when there are results for different conditions, we can have an idea of how much of the change is run to run variability vs the change in the condition. Thanks again!

@fikkellin 25 күн бұрын

please give some more information on this video...thanks

@donnywalker4691 25 күн бұрын

Hey there good videos I have a old dynamite kart engine dyno the software is super old the company has gone out of business do you know of a company I can get newer software from to get mine going again

@robbinsracing801 25 күн бұрын

I hear good things about the Company "YourDyno" though I personally have no experience with them.

@scrappy7571 27 күн бұрын

Lapping valves with the drill is a no-no. I was scolded by a well known machinist. A back and forth motion using a suction cup tool is the best way.

@robbinsracing801 26 күн бұрын

Everyone has their own way and opinion. It works for me so I shall continue with the drill method.

@MCRengines 27 күн бұрын

Nice videos! On the leak test does the gauge on the left say the pressure is 15 PSI? Was curious if you have increased this pressure. Thank you! Keep up the good work!

@KirkDoak 29 күн бұрын

I have a question. I used to ride karts growing up, everything from trikes, yard karts. My pride was my dart kart. Anyway, I'm 53ish now and finally got a used PRC kart. The motor is a beast. Fastest engine in a kart I've ever driven. My question is, how do i tell what kind of motor. The guy said it's a cyclone but I'm unsure as he sounded. He said it is a stage 3. How does one tell about that without opening it up? So now I scour through the videos.

@robbinsracing801 28 күн бұрын

Hey Kirk, without seeing it it would be hard to tell. I would take a picture and post it on Bobs 4cycle karting forum. The best guys in the business are in there! 4cycle.com/karting/

@gillyhall118 Ай бұрын

What oil is best to use?

@robbinsracing801 Ай бұрын

I only use the Briggs 4T by Amsoil.

@HarjitSi Ай бұрын

Great explanations, videos, love that you are data driven, and I really like how you use your tools i.e. with a lot of respect and care! A couple of questions for you. Around 14:00 you were taking measurements using the protractor and a depth gauge. Was that to profile the cam? What were you looking for? I'll recheck but i haven't seen you do a carb service video. Could you please consider doing one? Thank you.

@fikkellin Ай бұрын

Thanks great video!!!

@cromanyak5999 Ай бұрын

Where did you buy the 30 degree additional cutter from?

@robbinsracing801 Ай бұрын

www.cylinderheadsupply.com/cu126.html

@pdpate3 Ай бұрын

Great video. This is exactly what I was looking for. Thank You!

@parks.f1 Ай бұрын

I got an issue with my lo206 in senior class. Once the engine reaches 48 mph the engine gives a "popping" sound. It almost sounds like its hitting a rev limiter. Would a fix be a tuning on the engine, valve timing, or something with the carburetor? Also once i reach the speed where the sound starts i slightly lift off because i am not sure if it is fine for the engine or not and I see others in my class getting up to 51 mph just fine with no "popping" sound.

@robbinsracing801 Ай бұрын

So my gut is telling me it's too lean up top, try lowering your float height to start. I would also with the engine not running remove the filter, pull the throttle cable and insure your getting full throttle. Definitely worth throwing in a new plug just to rule that out too.

@robbinsracing801 Ай бұрын

Maybe check the kill switch wiring too for any shorts.

@alanjkarting Ай бұрын

Would you be kind enough to point me in the right direction on the kit for cutting the valves? We are not allowed to change the profile in the UK. Thanks in advance!

@robbinsracing801 Ай бұрын

You'll need the kit and the 30 degree cu126 cutter is separate. www.cylinderheadsupply.com/brstancukit.html

@alanjkarting Ай бұрын

@@robbinsracing801 Thank you.

@richardlemasters9684 Ай бұрын

where did you get the chain guard??? Exactly what I've been looking for, tired of chain lube being slung everywhere!! Thanks Brother

@robbinsracing801 Ай бұрын

Ya man I know, it was a full kit that has a matching engine mount and catch holder! Got it from @Jtpkartingproducts, absolutely the best CNC karting accessories money can buy period. Their website has been gone for awhile though. kzbin.info/www/bejne/gInceZVnf6mtjNE

@keithelkins4330 Ай бұрын

A lump seeing what was happening with the chain

@joelkart8772 Ай бұрын

Nice work man! I wonder what kit you use for the valves.. can you post a link pls?

@robbinsracing801 Ай бұрын

You'll need the kit and the 30 degree cu126 cutter is separate. www.cylinderheadsupply.com/brstancukit.html

@thiswillprobhrt Ай бұрын

Nice work. Glad to see you’re getting results from the dyno. Also note to self. Buy valves in pairs in case they are mixed up 😂

@donnywalker4691 Ай бұрын

Do you cut to angles on the seats

@robbinsracing801 Ай бұрын

Yup, first cut is a 45 degree and the seconds is a very light 30 degree cut per US rule set 21.f

@donnywalker4691 Ай бұрын

@@robbinsracing801 yes I do the same good job I liked the block going to build one

@donnywalker4691 Ай бұрын

Nice work

@scotts24d Ай бұрын

Love the Head leak down test jig nice tool 👍

@robbinsracing801 Ай бұрын

Ya man my buddy hooked it up!!

@jeffbarbara9188 Ай бұрын

Thanks jeff

@dbow1313 Ай бұрын

In a video you posted about carb maintenance and tuning you mention how you now run the throttle cable in a way that you can adjust idle with the cable vs the idle screw. Do you have a video on that?

@robbinsracing801 Ай бұрын

I don't but look out for one soon! My favorite vids to make are the ones viewers ask for. Also in the interim since I made this video I have heard it is no longer "Legal" to put locktite on that idle adjustment screw.

@dbow1313 Ай бұрын

@@robbinsracing801 thank you! I’ve seen plenty of drivers adjusting idle with the cable but mainly by twisting the cap. Not sure if they use loctite or not, but the idle screw is backed out for sure. ps: you never should have mentioned you make videos on request. :) Always very informative. This dad/crew chief thanks you!!!

@robbinsracing801 Ай бұрын

@@dbow1313 LOL!! I will remember that.

@fikkellin Ай бұрын

is there any reason you don't use the tire changer to break the beads? i love the changer very easy to flip the tires......great channel!!!!

@robbinsracing801 Ай бұрын

Thank you, its just faster and easier for me to do it that way. I struggled with one side breaking loose and the other just using the speed changer.

@darrylauston7493 Ай бұрын

Great video! One question I have is do you lubricate the valve stems when you reassemble? It seems there isn't consensus online and you seem to be successful with your technique. Thank you

@robbinsracing801 Ай бұрын

I have never but maybe I should be.... I haven't had any issues, Im guessing as soon as oil starts splashing around in the case the mist makes it up top quick enough to lube the steams.

@darrylauston7493 Ай бұрын

Thank you!

@darrylauston7493 Ай бұрын

Great video! One question I have is do you lubricate the valve stems when you reassemble? It seems there isn't consensus online and you seem to be successful with your technique. Thank you

@darrylauston7493 Ай бұрын

Sorry meant to post on your other video

@robbinsracing801 Ай бұрын

@@darrylauston7493 Thanks Darryl!

@Mahatheyew Ай бұрын

Is it true negative camber hurts straight line speed?

@robbinsracing801 Ай бұрын

I have heard the same although short of making an extreme change I doubt it can be measured on track.

@KirkDoak Ай бұрын

Blistering top end. Nice.

@KirkDoak Ай бұрын

Does it completely collapse the spring. Like a clutch spring, once it collapses or is compressed fully making the spring trash. It does not look like it is.

@robbinsracing801 Ай бұрын

No they can be reused. I'd swap them out first of the year and call it good.

@rwworonowicz 2 ай бұрын

Thanks!

@robbinsracing801 2 ай бұрын

Thank you too!

@bmwlane8834 2 ай бұрын

What's the part aft of left front wheel...parallel to axle? Great vids btw.

@MBeharsey 2 ай бұрын

Interesting… looks like a tire temp sensor. Would love to see that data.

@robbinsracing801 Ай бұрын

Yup, IR Temp sensors.

@jeffbarbara9188 2 ай бұрын

good job team

@nicko9579 2 ай бұрын

Interested in what you are using for a pump and pressure controller on your dyno. Is that just a needle valve you are running in and out with the wrench.? I like your videos, keep it up homie.

@robbinsracing801 Ай бұрын

Yea just using the needle valve to control the pressure. It came with a "knob" but it was hard to open under pressure. Took it off and that 8mm wrench fit perfectly, I'm going to use the wrench until I replace the valve with one I can control with an Arduino. Pump is just a standard Hydraulic pump, if I remember it was rated at 5000 PSI and 4000 RPM max.

@YoavArnon-l7m 2 ай бұрын

How do you know how much to measure between the front of the seat to the front of the chassis?

@robbinsracing801 2 ай бұрын

Going to be a different measurement for chassis model, and on top of that it can be a different measurement for different years of the same model.

@StevenonCouch 2 ай бұрын

Congrats. Any onboard videos?

@robbinsracing801 2 ай бұрын

Yes, I'll put something together. This was our first time back in 206 since 2020.

@Dadsgarage5280 2 ай бұрын

great video! awesome work.

@PrezesWRC 2 ай бұрын

I was looking forward to this, any chance you know ethanol content of your fuel, 10%? Thanks for sharing

@robbinsracing801 2 ай бұрын

Sunoco 91, not sure on the ethanol content.

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