Hobbsy

My Feedback: (102)

Dan, I still want to install a C&H Ignition on y 1.50. I need a new prop driver and Adrian's sensor. I have the stock intake on it now.

SrTelemaster150

Just take the magnet out of your present hub & re-use it. Drill through from the opposite side & use a pin punch to knock the magnet out.

Balance won't be affected enough to worry about. Go ahead & get both the magnet ring & sensor mount. They are available seperately from the module.

After you lean out the carburetor, don't be afraid to crank the advance to her. Start @ 34° BTDC & then try about 2° more. If RPM doesn't increase, go back to 34°. If it does increase try 2° more, repeat until you reach peak RPM.

blw

My Feedback: (3)

I think he runs them all too lean. I don't offer much advice anymore.

w8ye

My Feedback: (16)

He watches for smoke and tunes them to where the smoke is gone

hsukaria

Remind me to never buy a used engine from him!!

Rudolph Hart

It keeps them mean and clean.There's a fine line between pleasure and pain somebody once sang.

SrTelemaster150

Quote:

Originally Posted by w8ye

He watches for smoke and tunes them to where the smoke is gone

You can pretty much achieve that W/CDI on the top end. They still need to smoke a little in the midrange though.

Funny thing with my FA200Ti though. Try as I might, I could not get significantly more power W/CDI over GI, maybe 100 RPM, too little to be of any consequence. I did however go from 7 minute WOT run time on 12 oz of 15% Cool Power, to 12 minutes. I'll take that any day.

I need to try some straight methanol/oil mix to see if there is an appreciable power drop. Getting rid of the nitro will further improve fuel economy.

FNQFLYER

Mike having been there done that (but still to un pack) I emphasise, BUT it is a great time to take an inventory of ALL of your stuff, I have found all sorts of stuff including missing engines, kits and data not to mention tools etc, look at it as a good time to re acquaint yourself with your modelling. On the bright JG et al have gone and there is a strong OT fraternity at Belconnen Club, Grant Manwarring in particular. Get on to him through SAM 1788

Hobbsy

My Feedback: (102)

Did you find all your Saitos, that's the most important thing of all.

Charley

My Feedback: (2)

Run it on gas at 16:1 gas : oil mix. It worked for me.

CR

SrTelemaster150

Sigh, here we go again.

Methanol will make 25% to 55% more power over gasoline & I don't want the smell, increased carbon build-up & higher operating temperatures that will eventually decrease engine life.


If you want an example of the HP difference, my FA180HC running on 15% Cool Power fired off @ 35° BTDC W/CH Ignitions CDI will make 3.4 HP. (8450 RPM W/an 18 X 8 prop).. That's about 36% more HP that the 2.5 HP produced by the Saito FG30. If I tip the nitro to 30%, the HP increases to 3.9. (8850 RPM W/an 18 X 8 prop) Now we are talking a 56% increase in HP over the gas version FG30.

Besides, if i mix my own, methanol is about 1/2 the price of gasoline.

Hobbsy

My Feedback: (102)

Dan, do you have any numbers from using 0% nitro methane, that would be an interesting piece of knowledge. I am inclined to think it would still out power stink o line.

Charley

My Feedback: (2)

Well look,

You say alky will produce more power but then you give examples using high nitro content. I ran my FA-150 on reg gas & Klotz Super Technoplate @ 16:1 all one season with a CH ignition. It was down a couple hundred RPM at WOT compared to 10% Omega with the same timing. The engine was (still is) in a Ace 4-120 Bipe; seldom used or needed WOT. I've never been a fan of high nitro mixes to wring out every rev. What I want is reliability. Anyway, it worked for me..

CR

Rudolph Hart

Sounds like good advice charley will be doing the same to an fa220 in the future for my mew gull.

Charley

My Feedback: (2)

It'll be great to hear how it works out for you. BTW, I used the stock carb. It came in handy that the Saito needles have such fine threads.

CR

triumphman49

My Feedback: (149)

Sr is rite concerning the meth issue, but note the designation used after the FA180 HC - high compression - been modified - so not really apples to apples. Personally, like Charley, a couple of hundred RPM usually doesn't mean a lot of difference to me. I've got a FA150 with 2 different manifolds - stock carb\Walbro carb (CHI conversion) and FA270T with RCxel & stock carb. Probably be Spring before I decide which way I really perfer to run.

T-man49
Saito #723

triumphman49

My Feedback: (149)

Charley, Great to hear that you have been able to utilize the stock carb using petrol.

T-man49

FNQFLYER

Old Fart whose Mew Gull you got. A Seagull or one of the ones from Rocky.

Charley

My Feedback: (2)

I should add that I used muffler pressure, as you would on glow. Found out the hard way that Tygon gas fuel tubing melts when attached to a muffler pressure nipple (duh). So I used a piece of silicone fuel tubing at the muffler, to a inline fuel filter and then to the gas fuel tubing connected to the tank.

CR

SrTelemaster150

No I don't, but it is a fact that given the stoiciometric a/f ratios of methanol Vs gasoline, methanol has about 27% more energy available.

Why do drag racers run fuel (methanol) to make more power?

Rudolph Hart

Thanks for mentioning the tygon fuel tubing.In all the excitement small details like that can ruin a good days flying.

fnq the mew gull is seagulls 72" arf version and i'll be flying it scale with some mild aeros.The fa220 is in it and has been run,but i hav'nt flown it yet as there's a lot of stuff left to do before that happens.There's a youtube vid of one flying with a fa180 in it i think,engine seems more than adequate.

ps plus i'm busy riding my new black ducati gt1000

RC_Fanatic

My Feedback: (1)

They run pure nitro. Should we be doing the same?

SrTelemaster150

No they don't. They run varying % of nitro/methanol. Methanpol alone has 27% more power available than gasoline.

Aside from that, many are running E-85 now to make more HP over gasoline.

SrTelemaster150

If you are running the same ignition timing W/methanol & gasoline, you are leaving another 150-200 RPM on the table. The difference will be more like 350 RPM.

Methanol MUST have about 8° more advance to take advantage of the higher relative octane & slower flame propagation.

This is a commom mistake.

SrTelemaster150

Note that the in the tests below, my stock FA180 made just under 3HP (8050 RPM W/an 18 X 8 prop) that is 20% more than the Saito spec of 2.5HP for the FG30 & a LOT more than real world results for th FG30.


http://www.rcgroups.com/forums/showthread.php?t=1769449