Ignore the popup number on that as it’s no longer the correct limit.
Maybe I can do a project and show the dyno numbers on these types things this winter and do kind of what OG Ghost started to do with the myth busting series.
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back to the upside down fuel riser
Let’s do vertical too with the pulse vent hole facing the air for “magic boost”
If nothing else, us 206 racers are predictable. Dec to March will always be filled with these discussions.
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Wait, what? Are we doing stupid things racers do because they might make you faster?
@fatboy1dh in your many years of engine building, what’s the dumbest yet most persistent practice you have seen?
Fuel pump risers. Liquid gold for engine builders and absolutely 0 benefit on every dyno ever. Sounds good in theory but means 0 in practicality.
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And yet we all fall for the trap and use risers because everyone else does. If someone wrapped their exhaust with a soiled pair of Fruit of The Loom tighty whities and won a race, you can bet there’d be copycats 
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I like my risers as individual bolt spacers so I can wipe the ick that accumulates on the top plate, not cause it makes a performance difference. 
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I used left over two stroke fuel in mine once and it attracted a lot of questions 
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Well my fuel pump riser is orange and orange colors are worth +1hp!
Agreed, we used to race Honda GX200s and every local builder would completely remove the compression release from the cam.
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Mine is black, so no wonder if it never worked!
This is the key briggs tuners don’t want us to know. B&S hate this one simple trick.
I am intrigued by your approach Eric and would like to discuss running my child under your tent 
tell me more
Kidding aside… I bet superstition pays a role sometimes too. I know I have had to push a few of those aside.
So lemme rephrase… @fatboy1dh in your many years of engine building… what weird superstitions have you come across?
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Nothing crazy. Once had a dad come to me and give me the list of specs he wanted his engine set to. Ran it on the dyno and it was MUCH worse than our standard tune. Explained it to him, sent him dyno sheets. Everything. Never did convince him otherwise. Sent him a turd set up his way and a bill for my time. He was thrilled with his crappy engine and sent me quite a few referrals 
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Very odd. I went through a period where I would have to bounce the ball three times before I served, for example. Thats not mechanical, however.
In terms of dumb shit I ran an extreme western grip and strung my racquets at 80lbs to be like Borg (midsize racquets if the 80s). It was like driving the stiffest imaginable chassis. I had to carry 4 raquets because I’d blow strings 2x a match (catgut days).
Nowadays no one strings like that.
A good follow up to this is a dad decided to reset lash during the race day after a rebuild and dyno by us. Calls us up asking why his motor wont run right.
Spoiler alert, he in fact did not know how to set lash…
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@Matt_Geist how do you set the lash?
Do you do a Dyno run with an initial intake and exhaust setting? Then change one or the other and do another dunno run? Etc. To map out the combinations and then pick the best one?
Another question - how much does the range vary between the setting you ship the engine out at vs the worst you measure during dunno testing?
If this is getting into secret sauce, please ignore. I’m new and curious.
Thanks.