Welcome to Club SAITO !
07-13-2018, 08:29 AM
Senior Member
Not actually
,I am referring to the longitudinal position of the cam along the shaft.
The Right hand cylinder's intake cam is the forward POSITION on its shaft.
The right hand exhaust is at the rear.
Conversely
The left cylinder Intake cam is at the REAR position while the exhaust valve is actuated by the FORWARD
cam.
,I am referring to the longitudinal position of the cam along the shaft.
The Right hand cylinder's intake cam is the forward POSITION on its shaft.
The right hand exhaust is at the rear.
Conversely
The left cylinder Intake cam is at the REAR position while the exhaust valve is actuated by the FORWARD
cam.
07-13-2018, 09:03 AM
I had hoped to clarify that for you here:
....
I am referring to the longitudinal position of the cam along the shaft.
The Right hand cylinder's intake cam is the forward POSITION on its shaft.
The right hand exhaust is at the rear.
Conversely
The left cylinder Intake cam is at the REAR position while the exhaust valve is actuated by the FORWARD
cam.
I am referring to the longitudinal position of the cam along the shaft.
The Right hand cylinder's intake cam is the forward POSITION on its shaft.
The right hand exhaust is at the rear.
Conversely
The left cylinder Intake cam is at the REAR position while the exhaust valve is actuated by the FORWARD
cam.
The lobe at the intake position on the right cylinder is next to the cam driven gear.
Any comments regarding Dave's timing marks?
07-13-2018, 09:22 AM
My Feedback: (1)
07-13-2018, 09:43 AM
I guess too may of us couldn't read the Japanese characters for right and left.
Took me a while to just figure out "D" and "S" !
Seems the instructions and the timing pins should get the job done with the FA-90T etc.
At least I hope so
07-13-2018, 10:22 AM
My Feedback: (1)
so with this Cam Lobe swap talk about the twins, no one has pointed out that "the Valves must be swapped too" 
.
as for a new comment I have to say that I am surprised that Saito has not updated the performance of the FA 100 in some 14 years, most companies would have (like OS has with their Surpasss),, even if Saito only increased the Rocker Arm Ratio just a little it would work..
but with that said, if you could go back 14 years and you happen to own a Saito FA 100 you most clearly would have had the most powerful 4St engine in the 91 size, OS must have been a bit upset about the FA100 when it was released, and now after all these years OS has their 95 that is made in China (Jim scratches head). and you know for 100% sure that Saito will never be made in China..
any hoo, if some one would sell me another "never started" Saito FA 100 (or maybe a 115) for what I paid for mine (or less LOL), I would surly snag it
Jim
.as for a new comment I have to say that I am surprised that Saito has not updated the performance of the FA 100 in some 14 years, most companies would have (like OS has with their Surpasss),, even if Saito only increased the Rocker Arm Ratio just a little it would work..
but with that said, if you could go back 14 years and you happen to own a Saito FA 100 you most clearly would have had the most powerful 4St engine in the 91 size, OS must have been a bit upset about the FA100 when it was released, and now after all these years OS has their 95 that is made in China (Jim scratches head). and you know for 100% sure that Saito will never be made in China..
any hoo, if some one would sell me another "never started" Saito FA 100 (or maybe a 115) for what I paid for mine (or less LOL), I would surly snag it
Jim
07-13-2018, 11:10 AM
Senior Member
as for a new comment I have to say that I am surprised that Saito has not updated the performance of the FA 100 in some 14 years, most companies would have (like OS has with their Surpasss),, even if Saito only increased the Rocker Arm Ratio just a little it would work..
but with that said, if you could go back 14 years and you happen to own a Saito FA 100 you most clearly would have had the most powerful 4St engine in the 91 size, OS must have been a bit upset about the FA100 when it was released, and now after all these years OS has their 95 that is made in China (Jim scratches head). and you know for 100% sure that Saito will never be made in China..
any hoo, if some one would sell me another "never started" Saito FA 100 (or maybe a 115) for what I paid for mine (or less LOL), I would surly snag it
Jim
but with that said, if you could go back 14 years and you happen to own a Saito FA 100 you most clearly would have had the most powerful 4St engine in the 91 size, OS must have been a bit upset about the FA100 when it was released, and now after all these years OS has their 95 that is made in China (Jim scratches head). and you know for 100% sure that Saito will never be made in China..
any hoo, if some one would sell me another "never started" Saito FA 100 (or maybe a 115) for what I paid for mine (or less LOL), I would surly snag it
Jim
07-13-2018, 11:12 AM
I do have a FA-100 to spare, PM me. We can make a deal. You will like ir
The mirrored valve positions are the reason for the mirrored cam lobe positions.
The mirrored valve positions are the reason for the mirrored cam lobe positions.
Last edited by Jesse Open; 07-13-2018 at 11:15 AM.
07-13-2018, 11:16 AM
Senior Member
[img]https://i.imgur.com/rFKXWji.jpg?
Last edited by blw; 07-14-2018 at 02:52 PM. Reason: Arguing with political content
07-13-2018, 11:26 AM
Senior Member
Compared to the starboard/single cylinder cam, the port side cam is rotating in the opposite direction in regards to the crankshaft rotation. Perhaps Saito did not want to cast a new cam gear/shaft so they just marked over the dot that is cast into the single cylinder cam gear/shaft.
The Saito cams are made up with lobes "keyed" onto the shaft. They are not cast as a unit. Given the asymmetrical lobe profiles it would be perfectly logical that the LSA/cam lobe timing might vary by 1 tooth when the rotation is in the opposite direction..
The Saito cams are made up with lobes "keyed" onto the shaft. They are not cast as a unit. Given the asymmetrical lobe profiles it would be perfectly logical that the LSA/cam lobe timing might vary by 1 tooth when the rotation is in the opposite direction..
Last edited by SrTelemaster150; 07-13-2018 at 11:29 AM.
07-13-2018, 12:24 PM
Compared to the starboard/single cylinder cam, the port side cam is rotating in the opposite direction in regards to the crankshaft rotation. Perhaps Saito did not want to cast a new cam gear/shaft so they just marked over the dot that is cast into the single cylinder cam gear/shaft.
The Saito cams are made up with lobes "keyed" onto the shaft. They are not cast as a unit. Given the asymmetrical lobe profiles it would be perfectly logical that the LSA/cam lobe timing might vary by 1 tooth when the rotation is in the opposite direction..
The Saito cams are made up with lobes "keyed" onto the shaft. They are not cast as a unit. Given the asymmetrical lobe profiles it would be perfectly logical that the LSA/cam lobe timing might vary by 1 tooth when the rotation is in the opposite direction..
Are you saying; The left and right cams are turning in directions opposite from one-another?
How so? As the crank turns CW , both cams will be turning CCW right, left, top or bottom.
The cylinder's ports are reversed 180 deg, the cams are both turning in the same direction at any given time.
Regarding the markings:
I made a few comments very similar to yours early this morning. Of course, the wording was a bit different but the same tone regarding the reasons.
Last edited by Jesse Open; 07-13-2018 at 12:34 PM.
07-13-2018, 03:33 PM
Senior Member
Are you saying; The left and right cams are turning in directions opposite from one-another?
How so? As the crank turns CW , both cams will be turning CCW right, left, top or bottom.
The cylinder's ports are reversed 180 deg, the cams are both turning in the same direction at any given time.
How so? As the crank turns CW , both cams will be turning CCW right, left, top or bottom.
The cylinder's ports are reversed 180 deg, the cams are both turning in the same direction at any given time.
The rear cam in the FA-200Ti however (SAI200Ti35) does rotate in the opposite direction when viewed from the cam gear end, but then the crank rotates CW when viewed from the same direction..(the rear) That keeps the relationship the same albeit in the opposite direction. In fact, the SAI200Ti can be employed for CW crank rotation in a single cylinder Saito..Likewise the SAI100Ti can could be employed for the same result in single cylinder engines that use the SAI50 series cam.
07-13-2018, 04:09 PM
07-13-2018, 04:19 PM
My Feedback: (1)
as for the 100 Single I was surprised to find that intake is larger, you can see in my Sceptre link below that the Single's intake is .468" while the exhaust is .428", but to me it still looked to be a Hemi
(read to the left of the Prop/RPM numbers)
Saito FA-100
as for the 100T, I have to admit I have been wishing the .56 Jugs would work on it LOL, a 112 would be pretty cool
Jim
07-13-2018, 05:32 PM
as for the 100 Single I was surprised to find that intake is larger, you can see in my Sceptre link below that the Single's intake is .468" while the exhaust is .428", but to me it still looked to be a Hemi
(read to the left of the Prop/RPM numbers)
Saito FA-100
as for the 100T, I have to admit I have been wishing the .56 Jugs would work on it LOL, a 112 would be pretty cool
Jim
This could make the 100 cylinder more difficult to adapt for odd-fire twin uses.
An interesting bit of trivia regarding the word "Hemi":
While Chrysler Corp , now FCA did not invent the hemispherical combustion chamber, they did the next-best thing; First, they helped makeit very famous and well known.
Then, Chrysler trademarked the Hemi® name that is just as well known and a lot easier to say.
So, while just about anyone can make a hemispherical combustion chamber, only Chrysler (FCA) may legally call it a Hemi®. Of course, Chrysler can make a flathead and call it a Hemi® if they dared, it is their name
.I really like that company but for some reason, I have never owned a Chrysler built car. The founder, Walter P. Chrysler was a great man. Chrysler had always been an innovative company.
Sorry for the diversion, just thought some may get a kick out of the "Hemi" moniker story.
07-14-2018, 01:05 AM
Gary was it peugeot who developed the first five valve head in 1905?.I have no interest in modifying saito's but i do carefully select the size saito engine i need for that airframe to be well powered and then a bit.So far i've never needed any tailweight with the fa engines.
Sr did you finish your 7x57 yet? i used one quite a bit years ago and properly loaded they are hard to beat re bang for buck.
07-14-2018, 03:01 AM
Senior Member
07-14-2018, 03:17 AM
Same here Always willing to admit an error.
When someone doesn't understand a statement, I offer an explanation to clarify. Ambiguity is not the same thing as a blatant unfactual.
Rudoplh ,
Thanks, Do you think it would be okay if a motorcycle is in the background when I take Saito photos?
Peugot has been quite an innovator over the years.
If not for the Jeep brand, Chrysler would have been gone years ago. The Jeep story is interesting too.
The Jeep was created by the old Bantam Motor Co .
They built the first concept in only 6 weeks. It was for a government contract leading in to WWII.
An instant success, The military loved it.
Problem was, they didn't get to produce it
Instead, Ford and Willys took up production and Bantam slipped away.
When someone doesn't understand a statement, I offer an explanation to clarify. Ambiguity is not the same thing as a blatant unfactual.
Rudoplh ,
Thanks, Do you think it would be okay if a motorcycle is in the background when I take Saito photos?
Peugot has been quite an innovator over the years.
If not for the Jeep brand, Chrysler would have been gone years ago. The Jeep story is interesting too.
The Jeep was created by the old Bantam Motor Co .
They built the first concept in only 6 weeks. It was for a government contract leading in to WWII.
An instant success, The military loved it.
Problem was, they didn't get to produce it
Instead, Ford and Willys took up production and Bantam slipped away.
Last edited by Jesse Open; 07-14-2018 at 03:42 AM.
07-14-2018, 04:09 AM
My Feedback: (102)
Join Date: Dec 2001
Location: Colonial Beach, VA
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I have two LT 25's, one with a Saito .30 the other with an OS LA .25. The blue and white was a gift from cousin when he moved to Fla. I decided that one should be a tricycle plane. I moved the main gear back and you see the result.
This is a 1964 Jeep with a 52 hp F head engine, the engine sat just inside the right front wheel so the drive shaft was at an angle. We can't have motorcycles in the background of our Saito pictures, Pete said.
PS, when the brick house in the background was built, Native Americans still traveled to the Ohio River on the hilltop about 1,000 feet behind where this picture was taken.
Last edited by Hobbsy; 07-14-2018 at 04:17 AM.