I just wanted to point something out I noticed between the before and after Dyno Pulls when I watched the video back. You'll notice I have to open the relief valve a full half turn further in the first test vs the post test before it hit the limiter. Pressure in the system on the first pull was 1923 PSI and on the second pull it was 2382 PSI.
I love the way you present your information. Question about valvesprings, how often do they need to be replaced? And how do you know when the valves need to be replaced?
So the best thing you can do for the head is make sure after every session when you shut the engine down you pull the recoil starter until it gets tight. That will close the valves and help to keep the seal tight and prevent warping. If it were my engine I would only replace the values if I couldn't get them to seal, springs are cheap so might as well swap them out end of season just because.
Have you ever used a block off plate on the head to isolate the valves when you test for leakage on the LO206? If so, can you recommend a place that sells them? Keep up the good work!
I’m new to kart racing and still unsure on what engine I wanna start with…LO206 is what I been looking into getting but done know much on what upgrades are offered
Hey Brennen it's good to hear you've started karting. The LO206 is a box stock class and no modifications of any kind are allowed. Engine comes with just a carb and all you need to get is the accessories like exhaust, engine mount, clutch ect.
What did you set the lash at after maintenance im pretty sure the intake valve was 90% of the problem on HP these motors only have one cylinder & you cant have any valve leakage or your dead in the water 🥴
The engine in the vid still shows close to 15% but it’s all leaking from the bottom, there ‘s no longer air pouring out the intake. I’d say if you test with the head on 15% max and if you removed the head and had a plate to mount it too you would want 0% loss. For me it’s just a way to identify leaking valves that need service.
@@kzspeed1288 The platform when introduced was to be out of the box budget racing. Now it's $1000 builder prepared class. It's the primary reason karting is dying. Not banging on you just the whole evolution of engine rules packages. On a side note I don't have the answer to the problem so I just run opens.
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I just wanted to point something out I noticed between the before and after Dyno Pulls when I watched the video back. You'll notice I have to open the relief valve a full half turn further in the first test vs the post test before it hit the limiter. Pressure in the system on the first pull was 1923 PSI and on the second pull it was 2382 PSI.
loving the content!!!
Good stuff. Ty
Great video!
Thanks Hamish. I appreciate the feedback!
Great video. Thanks.
Thanks Jeff!
I love the way you present your information. Question about valvesprings, how often do they need to be replaced? And how do you know when the valves need to be replaced?
So the best thing you can do for the head is make sure after every session when you shut the engine down you pull the recoil starter until it gets tight. That will close the valves and help to keep the seal tight and prevent warping. If it were my engine I would only replace the values if I couldn't get them to seal, springs are cheap so might as well swap them out end of season just because.
Have you ever used a block off plate on the head to isolate the valves when you test for leakage on the LO206? If so, can you recommend a place that sells them? Keep up the good work!
I have not, that would eliminate the leakage from the bottom and give better results.
I’m new to kart racing and still unsure on what engine I wanna start with…LO206 is what I been looking into getting but done know much on what upgrades are offered
Hey Brennen it's good to hear you've started karting. The LO206 is a box stock class and no modifications of any kind are allowed. Engine comes with just a carb and all you need to get is the accessories like exhaust, engine mount, clutch ect.
Is the valve lash setting the same as your other video?
Thanks
Yes it is.
What did you set the lash at after maintenance im pretty sure the intake valve was 90% of the problem on HP these motors only have one cylinder & you cant have any valve leakage or your dead in the water 🥴
What is considered a good leakdown value for an engine that has good sealing valves?
The engine in the vid still shows close to 15% but it’s all leaking from the bottom, there ‘s no longer air pouring out the intake. I’d say if you test with the head on 15% max and if you removed the head and had a plate to mount it too you would want 0% loss. For me it’s just a way to identify leaking valves that need service.
What kind of dyno do you use? I’m looking to buy one
It’s a hydraulic brake Dyno. Built it myself.
Does valve lobe seperation benefit these motors?
Sorry I have no experience with valve lobe separation. Any info you have I’d love to listen.
Just re-affirmed that this engine platform is way over priced for the performance it provides. Those are some embarrassing numbers for Briggs.
We're making over 9HP. Motor does just fine as long as everyone else is on the same motor.
@@kzspeed1288 The platform when introduced was to be out of the box budget racing. Now it's $1000 builder prepared class. It's the primary reason karting is dying. Not banging on you just the whole evolution of engine rules packages. On a side note I don't have the answer to the problem so I just run opens.
That’s BS B&S
Great video, thanks
Thanks Mark!