BOOST BOTTLE!

darat · Post by **darat** » Wed Jan 19, 2005 10:08 am

Did any one here haved used a boost bottle. i made one and i was going to use it but i want more input about this

BluPhire · Post by **BluPhire** » Wed Jan 19, 2005 10:09 am

What the * is a boost bottle? like octain booster?

darat · Post by **darat** » Wed Jan 19, 2005 11:47 am

no it gives u more power in the mid and high range of RPM

vette76 · Post by **vette76** » Wed Jan 19, 2005 5:01 pm

this poll was already done and u forgot 1987

Tippmann98 · Post by **Tippmann98** » Thu Jan 20, 2005 6:36 pm

Oh, i have read about these things. They have had mixed reviews. I read one account where a guy made one out of an M&M mini's tube that he sealed up and put a valve on. Im not sure about these things so i am not reccommending it yet, but it is a intresting idea.

Post by **noiseguy** » Fri Jan 21, 2005 9:54 am

How about a link to a web article on the subject? If I could read something about it I could probably at least make an opinion. So far I haven't received any information on this type of mod other than a name and what it (supposedly) does.

Tippmann98 · Post by **Tippmann98** » Fri Jan 21, 2005 11:15 pm

I will try to get back to you on that one. I gotta find it again (if i can find it). But ill go look now.

darat · Post by **darat** » Sun Jan 23, 2005 12:14 am

this is one link that i found http://eindiancompanies.com/images/resonator.htm

Post by **noiseguy** » Sun Jan 23, 2005 7:04 pm

Neat article, thanx! Yes, you could build one of these for the Spree. Volume would need to be 100-150cc. The pipe would attach to the intake manifold.

I disagree with their technical explanation. I believe this is an example of a helmholtz resonator. It is usually used to quiet duct noise. In this case I believe it is linearizing flow through the intake.

BluPhire · Post by **BluPhire** » Sun Jan 23, 2005 8:20 pm

What do these do and how can I make and mount one?

darat · Post by **darat** » Mon Jan 24, 2005 1:53 am

i made one about 2 months ago and it is for a briggs and stratton engine but i am sure it would work with a spree.

darat · Post by **darat** » Mon Jan 24, 2005 1:58 am

here is another link that is better http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 08672&rd=1

Post by **noiseguy** » Mon Jan 24, 2005 9:57 am

Yep, the first link is still the best. I like the NOS sticker, nice touch.

To build, you'd need to get a couple of brass fittings, some tubing that would fit on them, and something to build the chamber from. You could build the chamber from PVC pipe, which would be the easiest to experiement with, and cheap. That's what the Ebay guy is doing.

Diameter of the brass fitting should be .3 to .5 times the diameter of the carb's narrowest point (someone will need to measure this), and the captured volume of the bottle should be around 100 - 150 cc. I'd build several volumes and experiment.

You would need to machine the fitting into the Spree intake manifold. You may wish to buy a spare for this. While you're in there, file out the crumming machine marks at the carb-intake junction. You'll see them when you get in there. A set of riffer files work well.

You'll also have to find a place to hang the thing inside the engine compartment.

BTW, this is meant to address the lack of low-end torque of a 2-stroke motor. It should not increase top speed (regardless of the claim.)

vette76 · Post by **vette76** » Sun Feb 20, 2005 2:13 pm

ok noise, you said volume would have to be 100-150 cc. how would you measure this? if you can tell me i will probably make one. also, what would happen if i filed out the intake a bit? thanks. what do u mean by the fitting would have to be .5 the size of the narrowest point of the carb? half the size?

vette76 · Post by **vette76** » Sun Feb 20, 2005 3:16 pm

here is what i have done so far. ill shave down the restriction later and post a pic of that. does this look good? it is very snug and has thread lock on it so i dont think it will leak.