i want to start by saying i not a member of any rc boat club or nat'l. body. just play with my .21 tunnels in a remote farm pond. but, i lived through this same thing in full scale boat racing in miami in the late 60's and early 70's. back then, mercury marine ran what they called 'stackers'. an inline six 2 stroke, 99 cid, with a y pipe for 3 pairs of cylinders, going into 3 bell megaphones abnout 30" long. quite a song at about 7 or 8 grand. you could literally hear just one running for a few miles. even in the city of miami. i know, i lived about 2 1/2 miles from pelican harbor (a race site), when i heard stackers, i could go watch the races. back then, politically correct wasn't in fashion. you went to have the same race you had for years, and the city said no-too noisy. no warning, no options, no race. regardless of what this does to impba, IT WILL AFFECT YOUR RACE SITES! you may not need impba, namba or local clubs to race, but you do need WATER. if you can't understand that, then good luck. i agree that ACCURATE measurement is near impossible, and that a legal boat at one race may not be at another site, due to environmental and site differances. but it will be the same for everybody, good or bad. accepting and working with the noise regs is to your benefit, or history will repeat itself, in a different scale. BTW, have you tried pointing your ex. outlet down? that spraying water is a good sound diffuser/muffler. not in the water, just pointing at it. water injection/wet stacks can help, but stalling can fill a motor with water, and it WILL affect the pipes range. probably have more torque and bottom end and lose top end-basically reducing the pipes volume. this was used on stackers that had been ported or over propped to help bottom end. used a solenoid to turn it off at higher rpm's. i do hope that this gets resolved, i had planned to start racing next season. boycotting events is not the way to resolve this issue. that will only cause more division in the organization, and possibly cause it to cease to be an effective governing body. then you won't have sanctioned events. fun for a little while, but not long lived. to have nationally sanctioned races, you need a santioning body. weakening what is in place only defeats your purpose. or do you want to split off and form your own ? look at indy cars, not the best solution. it's a simple challenge, make your boat fast and quiet. step up to the plate and accept the challenge presented. if you can't or won't, a lot of high dollar race boats won't be worth much before long. i've seen it happen before, don't be dumb enough to think it can't happen again to us. just my.02. if you want to know more about stackers, go to screamand fly.com, and do a forum search for "stackers". or go to the racing history forum and check out what it used to be like. pretty cool stuff, if you like FAST boats-mostly ob's.
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