Hi Fetor, I cannot completely understand why you would refer me, and the other 4-stroke Whizzer guys to 6 pages of back and forth 2-stroke chatter with very little scientific information.
If you had read this stuff, one thing came out in the first page that the boost bottle PROBABLY (read WON'T) work on a reed-valve engine.
When I had high interest in performance on the little chinese engines, I did some research on boost bottle technology, and here is the Reader's Digest Condensed version.
The total displacement of the boost bottle and it's lines and fittings, to be most efficient, should match EXACTLY the displacement of the engine. Ported into the intake, when the 2-stroke "sneezes" back into the carb, it would (presumably) "charge" the bottle with mixture, and upon intake, the contentents of the bottle would "push" a little, while being sucked back into the crankcase. This was thought to be a little like "supercharging" the crankcase. This system was credited to Yamaha Corp in the dissertations I read.
Ok, now if the reed (in between the engine and carb) would stop the action of the bottle, what do you think might happen with our intake valve? A good running 4-stroke will NEVER sneeze into the carb. We also do not charge our crankcases with mix to run, we port gas mix directly above the piston.
We concern ourselves with combustion chamber size and shape, cam profiles (lift and duration) carboration, cam and ignition timing, belt management, and other such issues.
In reality, there are very few simalarities in 2-strope and 4-stroke tuning and performance.
I hope what I've sadi here might clear up any confusion.
Mike, Thanks for your 2nd reply, What you said makes sence to me, I will look for free HP-performance in fine tuning other ares of the engine, ie cyl head,carb tuning,timing,cam. The possibility for performance gains in these engines is amazing. Well instead of turning my water bottle into a boost bottle, i think I;ll make a tool kit out of it. There's really no manifold to tap into anyway. Thanks for the info guys
I was suggesting to billspirit that there have been a number of threads started previously about Boost Bottles and a search beforehand would have helped for getting background info.I've seen peoples comments on these threads(including yours i believe) about 2-strokes/4-strokes so i figured the more knowledge the better....sorry about the confusion.
Well the Hose must be 1/2" if hes getting 17+CC"s out of it I get 4.29 on my PVC SET UP With 9 1/2" of 3/16" W/O even minusing the 1.35cc for the King nipple Disp. 17CC That is well over what I got for a hose Measurement
Note: CID = No. of Cylinders(1) x 0.7854 x bore x bore x stroke (all in inches)
CID to CC"s Conversion multiplier is 16.3870641
Reason being there is 16.3870641 CC"s in 1 CID
Intake BackPressure Canister for Continuous Flow:
2ea.: 1/8" npt King nipples
9-1/2 " of 3/16" gas line
5-3/16" of 1" schedule 40 PVC pipe glued, capped (both ends)! one end tapped for 1/8" king nipple (another for Manifold)
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69.71cc theorium and solution
TUBING : 3/16"=.1875"
.7854 X .1875 X .1875 x 9.5"(1/2"=.5") = 0.262311328125 CID = 4.298512548141 CC"s
Engine Displacement of Mine is 69.71CC - 4.29851254814cc (9.5" of 3/16" Tubing Displacement) =
/side note 66.0802038 Left for (Cylinder/Booster can) Displacement/
Plus the Booster can being 1"x 5.1875" (5-3/16") = 4.0742625 = 66.7652007477 CC's