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It is virtually the same size as the FA-65/8/91S series with identical footprint and only 1 mm taller and 1 mm more projection to the rear due to the larger carburetor..
My FA-115 fits into the same World Models 1/5 scale J-3 Cub cowl as my FA-91S did with only 1 mm more of the front edge of the rocker covers projecting from the bottom. Aside from the muffler and HSN, this is the only part of the engine that shows and I can hide it by adding a scale-like chin scoop to the bottom front of the cowl.
For those that like to maintain scale appearance, physical size matters a lot.
Last edited by SrTelemaster150; 04-04-2018 at 06:59 AM.
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It's the FA-100 that makes little sense.
in these 2 links the 100 turned more RPM with an APC 15x8 than the 115 will,,, even Horizon's specs say the 115 will only turn the APC 15x8 at 8,800
http://www.rcuniverse.com/forum/tach...ito-115-a.html
http://www.rcuniverse.com/forum/tach...-1-00-rpm.html
Comparing the FA-115 to the FA-100 is like comparing a 302 SB Chevy to the 305 SB Chevy
Not a significant advantage for the slightly bigger engine given that they have exacly the same bore & valve trains.
the stock Chevy 350 has a stroke of 3.480" (boar is 4.000 "),,, by using the Chevy 400 block (boar is 4.125") with a 327 Crank (3.250", you can build a short stoke 350, and it's larger bore will allow for larger diameter valves,,
now with all that said, I raced a 1967 Vett with the stock 396 (rated at 350 HP), and I beat it with my 71 Nova with a 327 L79 (rated at 350 HP/ 350 Pounds Torque) engine in it
Jim
Last edited by the Wasp; 03-30-2018 at 08:35 AM.
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not where the 100 is most efficient , and the 100 has more torque than the 115, and a larger prop is more efficient than a smaller prop, , the 115 will only spin an APC 15x8 around 8,800, while the 100 will turn the same prop around 9,000, even if they turned that same RPM I'm sure the 100 will produce smother, more tractor-able power, it would have to, because it has the longer stroke
in these 2 links the 100 turned more RPM with an APC 15x8 than the 115 will,
http://www.rcuniverse.com/forum/tach...ito-115-a.html
http://www.rcuniverse.com/forum/tach...-1-00-rpm.html
in these 2 links the 100 turned more RPM with an APC 15x8 than the 115 will,
http://www.rcuniverse.com/forum/tach...ito-115-a.html
http://www.rcuniverse.com/forum/tach...-1-00-rpm.html
I've seen a 300 RPM difference with the same engine at the same location with the same fuel under differing D A conditions.
I've seen a 50HP difference (.55 E T ) between a mid-morning pass and a mid-afternoon pass on the same 1/4 mile track with the same car.
when comparing a long stroke engine to a short stroke engine with the same C.I.D. any good engine builder will tell you the short stroke engine can be built to produce more power than the long stroke engine, and this is because the short stroke can utilize larger diameter valves and therefore have better Head Porting whereby the engine can use a higher performing Cam.
the stock Chevy 350 has a stroke of 3.480" (boar is 4.000 "),,, by using the Chevy 400 block (boar is 4.125") with a 327 Crank (3.250", you can build a short stoke 350, and it's larger bore will allow for larger diameter valves,,
now with all that said, I raced a 1967 Vett with the stock 396, and I beat it with my 71 Nova with a 327 L79 (rated at 350 HP/ 350 Pounds Torque) engine in it
Jim
the stock Chevy 350 has a stroke of 3.480" (boar is 4.000 "),,, by using the Chevy 400 block (boar is 4.125") with a 327 Crank (3.250", you can build a short stoke 350, and it's larger bore will allow for larger diameter valves,,
now with all that said, I raced a 1967 Vett with the stock 396, and I beat it with my 71 Nova with a 327 L79 (rated at 350 HP/ 350 Pounds Torque) engine in it
Jim
Last edited by SrTelemaster150; 03-30-2018 at 08:38 AM.
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Unless those tests were done with the same fuel @ the same location on the same day under similar atmospheric conditions,(Density Altitude) those results are meaningless.
Jim
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Well, for whatever reason Saito chose to discontinue the1.15, I sold my 1.15 so I could get a 1.25. Then I sold that 1.25 so I could get the one I have now with the additional and larger cooling fins.
Last edited by Hobbsy; 03-31-2018 at 01:20 AM.
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Jim, the question about the 1.30 cylinder working on the .65, it could be done using the right cylinder, you would have to rig a carb to the side intake port. A little American ingenuity could accomplish it. The left cylinder would require the left cam be used.
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This Webra Dyna Mix carb, (in the foreground) has as so called accelerator pump, it is a slot along side the slide valve that dumps fuel into the air stream as the slide opens. I never use a pump with the Dynamix although many say you should.
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Dave, yes that is the HP Carb with an accelerator pump I am talking about, but they also have a larger one for their 120 twin, it wouldn't be that had to put one on a 100T, but 2 of then may be too much for a 100T
the one in your photo looks smaller than the Carb on my OS 61 FX
Jim
the one in your photo looks smaller than the Carb on my OS 61 FX
Jim
Last edited by the Wasp; 03-30-2018 at 05:31 PM.
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Dave, here is the HP Carb in parts, part number # 84-2210 is the A-Pump
let hope the photo is large enough to see,, yee-up
let hope the photo is large enough to see,, yee-up
Last edited by the Wasp; 03-30-2018 at 06:50 PM.
Jim that's the funniest saito carb i ever seen...have you had any experience tuning a standard saito carb?
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Pete, I splained it better or more kindly as it should have been. I just received a new .62b, I like those new case engines.
Jim, it appears that the length of the pump stroke can be adjusted to suit your needs, as you can on the Webra Dynamix.
Jim, it appears that the length of the pump stroke can be adjusted to suit your needs, as you can on the Webra Dynamix.
Ever watched an exposed fanbelt on a piece of machinery and idly thought "i wonder what would happen if i just quickly touched it with my finger";...don't suck your tummy in and drop this thing down your shorts
Dave thanks i'm feeling kindly towards you now so was going to send you a whole bag of live crabs via airfreight,but could only fit one of them in.You be careful now ya hear?
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The following snip proves my point and you explained why Saito is discontinuing engines that have no "gas" counterpart..
And guess why they made castings with larger fins? They were having failures with the FG-20 so they made changes to enhance cooling and dubbed the new version the FG-21.
And guess why they made castings with larger fins? They were having failures with the FG-20 so they made changes to enhance cooling and dubbed the new version the FG-21.
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Pete- that's funny about the 12 ga handgun shooting street sweepers. The .410 Taurus Judge has shells called hallway sweepers. I keep mine loaded with 000 buckshot. Shoots a nice pattern out to 30', or more. I wouldn't want to be on the other end of it. I shot it some a couple of weeks ago. I do have 00 buckshot shells like you said, but they spread a bit too much for me, but they would do nicely for a hallway. They keep trying to convince folks to give up our guns. A dumb*** female senator in a very left state said we don't need AR-15's. A cute little newscaster told her we have a Bill of Rights, not a Bill of Needs. Heh, sounds good to me. I don't know if Dave saw that or not.
Speaking of Dave- my opinion is that you should leave the FA-56 in the 4 Star. Just saying. One day you'll miss it and will remember that I told you so. And, yes- I'll be sure to remind you.
Speaking of Dave- my opinion is that you should leave the FA-56 in the 4 Star. Just saying. One day you'll miss it and will remember that I told you so. And, yes- I'll be sure to remind you.
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That was a good one Barry, I rarely watch the news, I get mad and want to shoot the TV. I watch old westerns like Tales of Wells Fargo instead. The .56 is safe from being moved, the new .62 b will go on the Green LT 40.
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Jim that's the funniest saito carb i ever seen...have you had any experience tuning a standard saito carb?
Jim
Last edited by the Wasp; 03-31-2018 at 09:53 AM.
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Pete,, the truth is>> I can not leave anything alone, I very much enjoy modifying things, anything,, when I was a kid, abound 7y.o. I was mad at my mom, I didn't know why she wouldn't let me take apart her clock,, she had this beautiful clock, about 8, 9 inches in diameter, it never worked, yet sat on the buffet for years. I asked her 100 times to let me take it apart, like all my toys, some times I fixed them,
I think Dave and I are a bit alike LOL
BTW, my mother finely sold that clock some 40 years later at a lawn sale for $5, boy, only if I had $5 when I was 7
Jim
I think Dave and I are a bit alike LOL
BTW, my mother finely sold that clock some 40 years later at a lawn sale for $5, boy, only if I had $5 when I was 7
Jim
Last edited by the Wasp; 03-31-2018 at 09:54 AM.
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Yes Jim, I dug into a Clinton 3 hp Montgomery Ward lawn mower engine when I was about 10, it ran after re-assembly. Then I had a MayTag washing machine engine for a few years after that. Then a 3.5 hp Fairbanks Morse.
I just ordered a Bush Hawk kit now I need to know what is the glow equivalent of a 480 electric motor. A Saito .30, I hope.