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Old 10-05-2021, 09:24 AM
  #51351  
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Originally Posted by WMB View Post
What oil do you use?
Klotz Techniplate is preferred by many as a full synthetic oil.
Old 10-05-2021, 12:39 PM
  #51352  
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This, I have, thanks.

Old 10-05-2021, 12:50 PM
  #51353  
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Dave, what engine is the FAI fuel mix for. A high compression Saito?
Old 10-05-2021, 01:06 PM
  #51354  
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I just got it to play with and do some comparing. Thanks
Old 10-05-2021, 02:46 PM
  #51355  
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Dave
I use the Klotz Super Techniplate that is 20% castor. I know your feelings on using castor and I am thinking on switching when my supply is gone. I have had exhaust valves get carboned up on small 4C engines. I have also used a Go- Kart oil called Thor with good results but the price has gone up and it is now harder to find. My normal fuel is 18% oil and 3% nitro. This mix works good in all my engines for the type of flying I do. I am always on the look out for a lower cost oil that is good. The Klotz Techniplate is now about $70 and Super Techniplate is about $60 a gallon on Amazon.
Old 10-05-2021, 02:59 PM
  #51356  
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I just cleaned up an old high compression Saito 80 today, the exhaust valve was really heavily coated with black residue and the was from using 80/20 blend lube years ago.
Old 10-05-2021, 05:36 PM
  #51357  
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18% oil content at 80% synth/20% castor calculates to 4.5% castor. That's double the amount of castor I've been using these last 3 years. No problems so far with carbon build up sticking the exhaust valve at 2.25% castor. Time will tell I suppose.

I have no experience running 100% synthetic with methanol so I can't comment but Dave's engines seem to be doing good so far.

Last edited by Glowgeek; 10-05-2021 at 05:42 PM.
Old 10-06-2021, 06:55 AM
  #51358  
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I have run 100% synthetic in 2 strokes but you had to be careful of overheating, I think I will stick with a little castor in the oil blend of the 4 stroke fuel.
Old 10-07-2021, 10:15 AM
  #51359  
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O/K. I have one I need help on. Have a Saito 100 that I simply cannot lean enough with the LS needle to idle reliably. Even with the needle screwed all the way in still rich.

Will be pulling it off to have a boo, but other than an extremely opened jet or deformed needle end would not think this is possible.

Any ideas?
Old 10-07-2021, 10:20 AM
  #51360  
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I need a bit of help with this one. Have a side mounted 100 that I simply cannot lean enough with the LS needle to smooth out, even bottomed all the way in.

Other than a deformed jet tube or damaged needle cannot think of any reason could not drop the mixture without cutting it out completely, but it will still run, just rough.

Fuel is 15% nitro, 17% lube and used throughout the fleet.
Old 10-07-2021, 02:08 PM
  #51361  
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Originally Posted by Cougar429 View Post
I need a bit of help with this one. Have a side mounted 100 that I simply cannot lean enough with the LS needle to smooth out, even bottomed all the way in.

Other than a deformed jet tube or damaged needle cannot think of any reason could not drop the mixture without cutting it out completely, but it will still run, just rough.

Fuel is 15% nitro, 17% lube and used throughout the fleet.
Assuming you have already tried a new plug and adjusted the valve clearances it should run reasonably well (A bit rich) with the lsn set flush with the outside of a metal throttle arm or flush with the inside of a plastic throttle arm.

As to not being able to lean the lsn enough you may have crud built up inside the tubular portion of the lsn. That could cause a false "fully seated" feeling when screwing it in and cause all kinds of problems at other rpms too.

Another thing to check is the throttle barrel retaining screw for excessive wear. If it is badly worn the throttle barrel will extend outward further than normal causing an overly rich condition. I have never seen one worn to that degree but have heard of it.

Last edited by Glowgeek; 10-07-2021 at 02:33 PM.
Old 10-07-2021, 07:46 PM
  #51362  
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what's next ? how about a Saito with tolerances of 40 Millions of an inch. see the first ever Micrometer. and other stuff

Jim

Old 10-08-2021, 04:23 AM
  #51363  
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I wonder how a Saito that tight would run?!
Old 10-08-2021, 05:05 PM
  #51364  
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Originally Posted by FlyerInOKC View Post
I wonder how a Saito that tight would run?!

you mean sO straight. LOL

Jim
Old 10-09-2021, 04:14 AM
  #51365  
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My new engine test stand has gotten a good workout this week. I've run up four different engines so far (26cc to 55cc). Set up time is very quick, that is until I mounted up my Saito 90T. No way to get glow igniters on with those angled back plugs. Doh!, hadn't considered that. Time to rummage through my old parts boxes to see if I can find a couple of remote glow assemblies.

Last edited by Glowgeek; 10-09-2021 at 04:20 AM.
Old 10-09-2021, 10:55 AM
  #51366  
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Lonnie, here is a shot of the valve train on an OPS 120 four stroke, it's probably a real hemi.

Old 10-09-2021, 11:04 AM
  #51367  
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Very cool Dave, looks like a well built engine. The castings are beautiful! Hard to keep focused on the OPS when my eyes keep wandering to the Fitzpatrick and tuned pipe in the background.
Old 10-09-2021, 11:13 AM
  #51368  
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That Fitzpatrick gave a new definition to the word loud. The other engine is a Webra P-5 91, designed to turn a 16 x8 at 9,000 on 5% fuel, and it did exactly that. it flew a Cermark Cap 232. I tried that same 16 x 8 on a Super Tigre 91 and it turned it 7,700 and then started smoking then knocking loudly.
Old 10-09-2021, 05:28 PM
  #51369  
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opp, I did a booboo

Last edited by the Wasp; 10-09-2021 at 05:30 PM.
Old 10-10-2021, 01:49 AM
  #51370  
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Originally Posted by the Wasp View Post
opp, I did a booboo
Not a chance.
Old 10-10-2021, 06:28 AM
  #51371  
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Originally Posted by Hyjinx View Post
LolWhatever it is it's my wife's favorite when she occasionally graces our field. Love to see her smile on low and slow presentation passes.
They are both very pretty. And both my favorites too.
Been out flying the Oscar lately? That was my other favorite. Sure looked pretty, that open cockpit and the big round front!
IIRC, it had a proper Saito four stroke/cycle under the cowl too.

Dave, That OPS was a sweet engine, but only Chrysler can legally call it a "

HEMI "


Last edited by Jesse Open; 10-10-2021 at 06:34 AM.
Old 10-10-2021, 07:54 AM
  #51372  
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The included angle between the valves was 60 degrees, I recon a Hemi is 90 degrees. I think.
Old 10-10-2021, 08:26 AM
  #51373  
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Originally Posted by 1200SportsterRider View Post
The included angle between the valves was 60 degrees, I recon a Hemi is 90 degrees. I think.

Just kidding, but actually the word "Hemi" a
trademark registered by Chrysler so nowowned by the current Italian operators

Hemispherical, perhaps but Hemi is already owned . The Guzzi V twins are true Hemispherical, happily not "Hemis"


Last edited by Jesse Open; 10-10-2021 at 08:29 AM.
Old 10-10-2021, 07:42 PM
  #51374  
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Originally Posted by Jesse Open View Post
Just kidding, but actually the word "Hemi" a
trademark registered by Chrysler so now
owned by the current Italian operators

Hemispherical, perhaps but Hemi is already owned . The Guzzi V twins are true Hemispherical, happily not "Hemis"
did you guys know, that back in the late 60s that the Dodge/Plymouth 426 Hemi was NOT the largest Hemi that Dodge/Plymouth raced. they also had a 452 Hemi, or was it a 456, cant remember, but it did live

and, back then, Chevy had a 372, with a 350 crank (3.480 stroke) in a 400 block (4.125 bore) that they raced in the Cheetah. a very cool car if you like setting on a ring gear LOL

Jim
Old 10-11-2021, 04:40 AM
  #51375  
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Originally Posted by Jesse Open View Post
Been out flying the Oscar lately? That was my other favorite. Sure looked pretty, that open cockpit and the big round front!
IIRC, it had a proper Saito four stroke/cycle under the cowl too.

Dave, That OPS was a sweet engine, but only Chrysler can legally call it a "

HEMI "

Haven't seen that one lately. Brian has so many planes in rotation, it's rare to see a single mount more than once a summer. The MS is on a cradle,, thinking of pulling it's g 26 for a radial. I have a 1/4 Stinson that I brought up for the gasser but I have two Saito 150s on the shelf that are easy and run nitro. I'd sell the g26 but they don't bring much on the forums. It is a great running easy to start no ignition motor. First one I have used. Just don't care for the sound, smell and transport of fuel.
Leaning toward the big FA....

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