The backpressure you speak of is exactly why it may be possible to add a small ammount of boost to a nitro 2-stroke despite the lack of exhaust valves. With the proper tuned pipe, your backsurge from the tuned pipe may help to contain and add additional pressure to the pressurized charge being provided by the turbo or supercharger. Obviously the gains wouldn't be nearly what you see from turbos on valved engines, but if you get everything just right I could see how a nice little gain could be possible. Not that the gains would be worth the added fuel costs, but the coolness factor of building something like this on your own is definatley worth the extar nitro.

Please note that just because I quoted killer89, the following is in no way directed solely at him, I only quoted him to make my point that the tuned pipe backpressure may allow turbo/super charger to work despite the lack of exhaust valves in 2 stroke nitros.

I do not know any of this for a fact as I have never tried it myself or witnessed a supercharger on a nitro engine, but I can see how you could definately get some minimal gain. Although I would think a direct drive supercahrger would be more effective than a turbo.

Regardless, I do not understand everyone's need to flame over the topic. Even if the turbo gives no gain at all, it is still awesome that he built it. It's not like the guy is on here spamming the forums relentlessly trying to sell them. He built something cool and decided to share it with us, and personally I am glad he did. I thought the whole point of these forums were to discuss ideas in a respectful manner, not to just jump on every opportunity available to assert ones opinion while demeaning others ideas and attempting to convey intellectual superiority. I seriously think some of you need to either lay off of the caffeine or else go get a girlfriend or something. If you search for release through internet forums by bashing others, you really need help.