ORIGINAL: DarZeelon
ORIGINAL: spaceworm
My ASP .91 came with a muffler that the magazine review said was the same as for the .75 and the .61. Comment was that the small muffler drove the max HP down but increased the torque at lower speeds so that bigger props were most effective. I run mine on FAI fuel using speed shop methanol and Klotz Lubriplate castor/syn blend. 1,700 RPM idle and 8,400 RPM high with 14x8 MAS prop. Good transition and smooth running at all speeds. I may try larger diameter props just for Ss and Gs.
SW,
I believe Klotz call their series of synthetic oils for methanol based fuels [link=http://klotzlube.com/products.asp?cat=8]Techniplate®[/link]; not Lubriplate.
The MVVS .91 engine, albeit equipped with a tuned-pipe and a 9 mm carburettor, turns an APC 14x8 at 10,500, on just 5% nitro... This equates to 2.27 HP.
Your posted 8,400 RPM on the MA (K-series) 14x8, is just 1.26 HP and it is bettered by most muffler equipped .61 engines...
Believe me; the 'extra torque' you may be getting, equates to 'nothing flat', in an engine run at full throttle and at its maximum attainable RPM...
Your engine; unless it is transitioning to full power, is NEVER run at partial speed, with a fully open throttle; so any theoretical additional torque never manifests itself.
The pipe and 5% nitro cannot be not worth an 80% power gain...
Either the muffler is killing your engine, or it just has very low power...
I stand corrected on the Techniplate vs lubriplate, thank you very much. I did not profess to be getting maximum performance from my engine fuel combination, and I stated what the magazine reviewer said about the muffler used with the engine I have. Have you read the article and do you take issue with his inputs? I am satisfied with what I am getting with the fuel/oil I am using, as I am sure you are with your MVVS engines, nitro and tuned pipe. We are talking apples and cumquats here. I do not care to use a MVVS, nitro, or a tuned pipe, and am obviously not concerned with "B***s out high performance. I am sure most everyone by now knows how high performing your MVVS engines are, please don't bother telling me again. Thank you very much.
Sincerely,
SPACEWORM