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Simons smart body, 4-6 hp increase??

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A throttelbody with a slide design instead of the butterfly valve version. Up to 6 hp more!?? Sounds too good to be true, but if it is it would be a great investement with a pricetag at 550$. What do you think, true or false ?

http://www.dirtbikemagazine.com/ME2/dirmod.asp?sid=&nm=&type=news&mod=News&mid=9A02E3B96F2A415ABC72CB5F516B4C10&tier=3&nid=0FCE003F2B3A4BF69C5D2D5E8F3C037C

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It's true. Adding a FCR carb back onto the FI bikes has added up to 4HP by just doing that, so the SSB seems to be just a well functioning and efficient TB.

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Good luck on this thread. I posted this about a month ago and it seemed like no one was even interested. I agree with you, that a slide type throttle body would be the ticket for these FI bikes. But I have to admit that the guys website did suck, and still does, but his system could be very good, and for the price of a silencer slip on! Maybe this is what the FI bikes with the limited top end needed. I look foward to more tests on this system, especially for the track. The link you found is a lot better than his website, so maybe some of the guys will be more interested.

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I would like to mention, in case anyone missed it, in that ad it says "they cant wait to test it"

so they obviously havnt tested it yet.. and who knows, maybe they wont he be happy with it and have a ton of complaints? just something to consider....

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Santan 9 in case you missed it, they said they had already tested the prototype and were very happy with the performance of it. But then again maybe they wont like the new version. I just always thought that a slide type throttle body would work so much better, so I was stoked to hear about this, and that it supposedly worked better.

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Very interesting and trick lookin' piece. I look forward to seeing the results of more in depth testing.

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If the magazines gives this thing "thumbs up" after a real test, i can imagine this will be a huge sales success! But why dont the factory teams allready have the slide version? Surely the factory R&D guys must have known this would be more effective when they started working with efi systems?

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You would think so, I would have to see some non ad money sponsored dynos and real people testing before I would hop onto this

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It's about damn time one came out!

Me and a few guys have discussed the need for this..and wondered why the manufacturer used a butterfly.

Only thing we figured was manfacturing costs.

I am sure it's an awesome product and cant wait till it's for more models.

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When they dynoed the standard throttlebody with the fmf system, was it remapped then or was it not? If not, that test is not really fair, a standard mapping with an aftermarket exshaust system wouldn´t run that much better on a dyno than a stock exshaust would it?

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i came very close to having one bolted on yesterday. Dave was testing with Dirt Bike at Glen Helen Thursday and he offered to meet me at Racetown yesterday. He said he would put it on, and if i liked it i would buy it, if i didnt he would put it back to stock. This is a kx450 btw. I decided with an important race coming up next week to wait and see someone non biased test and endorse it. Bobby Bonds ran one at Pheonix and ran out of gas in something like 45 minutes with an IMS tank, not good. I cant afford to have that happen. When i see the top teams, not magazines, run them, i will be sold.

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Im really interested in these.Sounds like a great idea but I dont like that fact that they had to add the FMF pipe in the dyno comparison.Once I see a few more tests on them then I will be convinced.

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I posted about this in the YZ450F forum some time ago. The response was not overwelming. The reason people aren't too wild about this is that the gains they talk about are at mid-throttle openings (like Boyeson and Scary Fast carbs wings). While this is nice, the rider could just open the throttle wider. On a dyno, only wide open throttle settings matter. Also while considering the slide vrs. butterfly, the larger opening in the butterfly throttle body makes up for the butterfly being in the air stream. Injectioneering has a mod that smooths the first 1/4 throttle opening of the butterfly.

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i have been experimenting with the TBs im making new butter flys and cutting the angle to 8* instead of 10* letting the plate stand up straighter in the bore what this does is gives less plate area opening for the same throttle movement you also close the plate down futher with the adjustment screws and have to re adjust your tp sensor a hole needs to be drilled or your air bypass adjustment will be maxed out to get it to idle . i have also shaped the plates and shaft to give considerably more flow for example the honda TB goes from 396 cfm to 460 cfm with the same plate the only thing i have not done is flow the TB with out the shaft and plate to se how eficent my butterfly mods are.

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Wow Ron, awsome as usual. These FI bikes have interesting potential. I don't know how those flow rates compare to the old carbs. I imagine some reprogramming of the fuel would be in order for the 16% increased airflow at wide open. I don't know if that's within the injector's capability. Although I now have a 2010 YZ450F as my primary bike, I stop in here to see what's going on. Since so many of the FI bikes use the same injector, work in this area will benefit all of them (and the developer's wallet).

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i have been experimenting with the TBs im making new butter flys and cutting the angle to 8* instead of 10* letting the plate stand up straighter in the bore what this does is gives less plate area opening for the same throttle movement you also close the plate down futher with the adjustment screws and have to re adjust your tp sensor a hole needs to be drilled or your air bypass adjustment will be maxed out to get it to idle . i have also shaped the plates and shaft to give considerably more flow for example the honda TB goes from 396 cfm to 460 cfm with the same plate the only thing i have not done is flow the TB with out the shaft and plate to se how eficent my butterfly mods are.

Are you still using your intake reducer with these mods?

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