ORIGINAL: CustomPC



There's no dispute that YS 4-strokes produce best-in-class power for any given engine size, but to get that power you have to use high nitro fuel (20% ormore)andthe costcan start to add up.

I'm kinda like Gray Beard. I like the 2-strokes that can turn large props. My personal preference is for Webra's. Nitro in Europe is expensive so engines made there typically peform really well on very little nitro.

I have a Webra .91 2-strokethat runs extremely welland effortlessly turns a 15x8 prop in the mid 9's. Remember, this is on FAI fuel or 5% nitro so my fuel costs are considerably cheaper. The OS equivelent can't even reach those rpms on 15% fuel.

Can any tell me what a YS 1.10 turns15x8, 16x6 and16x6 props at?

They don't require the nitro, it just makes it easier for people to set the low end, Ihave run them on 5% and other then the idle they run just fine. Only glow fuel Ibuy is 15% and I'm a YS guy.
Irun the 16X6 and 16X4 APCs on my 1.10s and Iget about the same readings as Joe, maybe a little less?? Been a couple of months sense I put a tach on one, a lot depends on how you tune them, Imay be a tad fatter then Joe, OK, Iknow I'm fatter then Joe but we are talking engines!
Iwas the pit man for a racer that was running the Webras, another good engine. Idon't know how low on nitro Ican go with the SKs but Ihave a friend running a big Moki so I may borrow some of his FAI and see how they {it} do?? Right now I'm only running the one SK .91 two strokes, Iam running a couple of gassers and the rest are four strokes, one OS. I have no problems with the other four strokes, I just like the YS best!!</p>