Welcome to Club SAITO !
03-25-2019, 03:05 AM
My Feedback: (102)
Join Date: Dec 2001
Location: Colonial Beach, VA
Posts: 20,370
Likes: 0
Received 25 Likes
on
25 Posts
I don't know if you could pull that off with two check valves, it probably requires two pumps, one fast and one a little slower. Also a reservoir, an oil cooler and filter. That should do it.
03-25-2019, 04:07 AM
Senior Member
Watchew talkin bout willis?
Glowy the turbo headers are well made,sound better and are much lighter than the stock muffler assy,all pluses for me.Jim sent me two,one for the fa82 which was baffled and one for the fa220 which was not,beautiful looking piece of work.I had an extra 330 with the fa82 in it and turbo header but they are both dead now after a vertical dive into a tarmac airstrip at full throttle.
I'm keen to see how these prop calculators work as others refer to them also.Just kidding but is there any snake oil salesman involved?
Glowy the turbo headers are well made,sound better and are much lighter than the stock muffler assy,all pluses for me.Jim sent me two,one for the fa82 which was baffled and one for the fa220 which was not,beautiful looking piece of work.I had an extra 330 with the fa82 in it and turbo header but they are both dead now after a vertical dive into a tarmac airstrip at full throttle.
I'm keen to see how these prop calculators work as others refer to them also.Just kidding but is there any snake oil salesman involved?
03-25-2019, 04:15 AM
SrTelemaster150
just wanted to say glad you’re still around and the 180HC’s are awesome. Thanks a bunch for your help with those.
Are there any hop ups for a 120? like maybe a 150 crank.
just wanted to say glad you’re still around and the 180HC’s are awesome. Thanks a bunch for your help with those.
Are there any hop ups for a 120? like maybe a 150 crank.
03-25-2019, 04:43 AM
Senior Member
I always return eventually.
03-25-2019, 04:52 AM
My Feedback: (102)
Join Date: Dec 2001
Location: Colonial Beach, VA
Posts: 20,370
Likes: 0
Received 25 Likes
on
25 Posts
Thanks to you getting me started I now have a Saito high compression 80, a Saito high compression 150, an FG11 all with CDI, and am leaning toward converting a 65, I have the stuff. I switched the FG 11 to CH Ignition due to it's much hotter spark.
03-25-2019, 04:53 AM
Senior Member
Last edited by SrTelemaster150; 03-25-2019 at 05:11 AM.
03-25-2019, 05:35 AM
Senior Member
FA-150 stroke is 27.5mm
FA-120S stroke is 24.7mm
That is a 2.8mm increase in stroke. Half of that increase would be 1.4mm increase in compression height or .055". Probably too much to prevent valve and/or head deck interference.
By using the C&H Ignitions .020" cylinder base shim you could probably remedy that situation by reducing the net increase in compression height to .035".
I have one of those shims somewhere if I can find it. You would still need to check head deck/valve clearances with .015" wax sheet. Crankcase clearance for the rod could also be a problem.
Displacement would be increased to 22cc or 1.34 cu in. I'm not sure what the CR would be, but it would be substantially increased over stock. If someone could link or post the Clarence Lee data on CR and combustion chamber size I could compute the CR.
Another option might be to swap the FA-150 conrod for the FA-120S item. That would only work if the journal diameter is the same and the C-C length of the small/large end rod bores is about .020"-.055" shorter for the FA-150 rod.
Last edited by SrTelemaster150; 03-25-2019 at 05:40 AM.
03-25-2019, 05:42 AM
Senior Member
03-25-2019, 05:55 AM
Senior Member
03-25-2019, 06:28 AM
My Feedback: (1)
Jim
03-25-2019, 06:42 AM
so I believe the rods are the same.
03-25-2019, 06:46 AM
My Feedback: (102)
Join Date: Dec 2001
Location: Colonial Beach, VA
Posts: 20,370
Likes: 0
Received 25 Likes
on
25 Posts
Dave, I was going to try it as Gary said, I would think it should work, because these valves came with my regulators (I just need a couple more), they are used with the OS Heli engine regulators to hold the tank pressure from going back into the crank case, and knowing a 4 stroke should have more crank case pressure than a 2 stroke I would think they would work on a Saito too
Jim
Jim
https://www.towerhobbies.com/cgi-bin...H=check+valves
Tower has several.
03-25-2019, 07:13 AM
You got the wheels turning.
FA-150 stroke is 27.5mm
FA-120S stroke is 24.7mm
That is a 2.8mm increase in stroke. Half of that increase would be 1.4mm increase in compression height or .055". Probably too much to prevent valve and/or head deck interference.
By using the C&H Ignitions .020" cylinder base shim you could probably remedy that situation by reducing the net increase in compression height to .035".
I have one of those shims somewhere if I can find it. You would still need to check head deck/valve clearances with .015" wax sheet. Crankcase clearance for the rod could also be a problem.
Displacement would be increased to 22cc or 1.34 cu in. I'm not sure what the CR would be, but it would be substantially increased over stock. If someone could link or post the Clarence Lee data on CR and combustion chamber size I could compute the CR.
Another option might be to swap the FA-150 conrod for the FA-120S item. That would only work if the journal diameter is the same and the C-C length of the small/large end rod bores is about .020"-.055" shorter for the FA-150 rod.
FA-150 stroke is 27.5mm
FA-120S stroke is 24.7mm
That is a 2.8mm increase in stroke. Half of that increase would be 1.4mm increase in compression height or .055". Probably too much to prevent valve and/or head deck interference.
By using the C&H Ignitions .020" cylinder base shim you could probably remedy that situation by reducing the net increase in compression height to .035".
I have one of those shims somewhere if I can find it. You would still need to check head deck/valve clearances with .015" wax sheet. Crankcase clearance for the rod could also be a problem.
Displacement would be increased to 22cc or 1.34 cu in. I'm not sure what the CR would be, but it would be substantially increased over stock. If someone could link or post the Clarence Lee data on CR and combustion chamber size I could compute the CR.
Another option might be to swap the FA-150 conrod for the FA-120S item. That would only work if the journal diameter is the same and the C-C length of the small/large end rod bores is about .020"-.055" shorter for the FA-150 rod.
No need to buy a shim, I already made several is "someone" would like one....
03-25-2019, 01:27 PM
Senior Member
03-25-2019, 02:33 PM
Hi SrTele, seems like I read on a thread about you experiementing with CR changes on an 82? Not sure, could have been another poster on that thread. Anyway, the thread died and the outcome was inclusive do to a broken lightened con rod. Love to hear more about the 82 if that's one you've tinkered with.
03-25-2019, 03:01 PM
03-25-2019, 03:29 PM
Senior Member
Hi SrTele, seems like I read on a thread about you experiementing with CR changes on an 82? Not sure, could have been another poster on that thread. Anyway, the thread died and the outcome was inclusive do to a broken lightened con rod. Love to hear more about the 82 if that's one you've tinkered with.
It was an FA-180.
https://www.rcgroups.com/forums/show...CDI-Project%29
03-25-2019, 03:33 PM
Senior Member
03-25-2019, 03:52 PM
This is the thread I was referring to. Canardlovers thread on lightening Saito parts. RVM, Dowunder, and as recall Pete was there too being well, a rude ol fart.
http://www.rcuniverse.com/forum/glow...-saito-4s.html
I will be experimenting with raising the CR on one of my 82's in the near future to optomize it for 15% nitro. I'm just not sure yet what CR I should target. Any ideas on that?