Hia every body, Im going to prove the groove in stockholms indoor carting recreation center. Hopefully all goes good and Ill be grooving ,
Ive downloaded an app that meassures vibration, will be interesting to se the difference before and after. Hopefully i will receave my ir thermometer to, will do consumption test, just emitions i dont think ill be able to do, If this works out good I will have a great referance . Have appointment on tuesday next week, wish mi luck folks.

I use a web service for billing custemers without having a company its called frilans finans works in europe and i have their app to

Ok i have now grooved a carburator off a honda gx 270 9hp did exsaust temp witch stayed the same vi ration test showed slight improvment milage test is the deciding factor for me to do all their gokarts and i will be updated on this tomorrow ill now try to upload some pictures
saludos desde Suecia Markus Olof Bohlin

Good luck with that one Markus, I was looking into that here in Washington but the places in the area all switched to electrics... what's up with that?

Karl Fortner
Tacoma, Wa.
Gadgetman Tacoma

vibration test x y and z axis whent from .50 .14 .50 to .20 .02 .46
means it vibrated less after grooved ,at idle. Hopefully the guy who does the milage test wont use full throtlle all the time as i find it hard to see how there can be any gain then. !!?
Here are some pics

even at full throttle, as the air is drawn past the groove, one would think that the barometric pressure in the groove would be lowered enough to draw air into it.

One of the guys did his chain saw and ran tests at full throttle and did note improvements. Granted, getting 3/4 of a second improvement on a 3 stroke cut doesn't seem like a lot but if you apply that difference to a go-cart doing laps and calculate that out to an entire years worth of use, the gains should be easier to express.

Make believers out of them...

Karl Fortner
Tacoma, Wa.
Gadgetman Tacoma

these carts have a rev stoper. I realice now that i shuld have unscrewd the idle screw to bring groove back a little and inprove idle consumption as they stand and idle a lot, i found a video on training for small carbs on gadgetmanglobal, just wish i would have seen it before, keeping thumbs up hopefully ill be able to do all their karts. The chain saw cuts faster, the kart goes same top speed, he did say it felt like it had more power comming out of corners, ye right i see what you mean after many races with better acceleration the lap times shuld go down meaning a little less time driving and there for in the long run saving gas. then he had a race with a hevier man who used kart number4 the grooved one and they where even all the time.

I will now start to smothern out the tb plate as uneveness might create turbulance that would affect the groove winds.

I think your idle would be okay, as long as there is air going past the groove it is having some effect on the fuel comsumption.

I have a kart track here in Washington that uses the Birel N35 with the Honda 9hp 4 stroke. It would be a good foot in the door if your customer has all of theirs done.

Either way, I'll pay them a visit.

It's already sounding like a win, let's hope they see the long term value.

Karl Fortner
Tacoma, Wa.
Gadgetman Tacoma