Thunder Tiger 4 stroke engines...any good?
06-06-2012, 08:33 AM
#51
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RE: Thunder Tiger 4 stroke engines...any good?
ORIGINAL: [email protected]
go get a os or magnum both are good dont sell your self cheap on engines
go get a os or magnum both are good dont sell your self cheap on engines
Ermmm...
You are contradicting yourself when you suggest using an OS or a Magnum, insofar as the Magnum is just a rebadged ASP or SC by Sanye and is not a top shelf engine. See what intense advertising can do. Repeat something often enough and people begin to believe you. Shame on you Hobby People.
I happen to like Sanye engines, but I won't fool myself into thinking that they are something more than they really are.
Ed Cregger
06-06-2012, 01:11 PM
#52
RE: Thunder Tiger 4 stroke engines...any good?
I only bought a Magnum once when Hobby People had their Magnum 52RFS (4-stroke) for $80 a couple of years ago. The 91 RFS is selling for $130 now, which is tempting. I would only buy them at these ultra-low prices.
06-06-2012, 01:31 PM
#54
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RE: Thunder Tiger 4 stroke engines...any good?
I own Thunder Tiger, Magnum, Saito, and Enya 4-strokes, and I love them all. My TT F-91s is a real stump-puller!
I've heard there is a new company named O.S. Max that is making 4-strokes now, as well. I'll have to check into those...
I've heard there is a new company named O.S. Max that is making 4-strokes now, as well. I'll have to check into those...
06-06-2012, 03:20 PM
#55
RE: Thunder Tiger 4 stroke engines...any good?
ORIGINAL: cymaz
I posted [link=http://www.rcuniverse.com/forum/m_11103449/tm.htm]see here[/link]this a couple of days ago..........
I posted [link=http://www.rcuniverse.com/forum/m_11103449/tm.htm]see here[/link]this a couple of days ago..........
06-06-2012, 03:39 PM
#56
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RE: Thunder Tiger 4 stroke engines...any good?
Howdy F.W.I.W. I dont like the new T.T. design I prefer the brass valve guides . Valve seats etc. I dont particulary like O.S. s new design either and would like to see satio have conrod bushes even though there troulble free , would I be prepared to pay more ? Absolutly and if magnum can do this and still be a budget engine so can the others , and Im not saying the mag. are a better engine then these . These old style engines tend to last forever . Cheers the pope.
06-07-2012, 04:18 AM
#57
RE: Thunder Tiger 4 stroke engines...any good?
Are you cliaming that Magnum has brass valve guides? Perhaps the larger ones, but not the smaller sizes? Not sure they are needed either, not that much movement or stress on valves.
06-07-2012, 08:08 PM
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RE: Thunder Tiger 4 stroke engines...any good?
ORIGINAL: Sport_Pilot
Are you cliaming that Magnum has brass valve guides? Perhaps the larger ones, but not the smaller sizes? Not sure they are needed either, not that much movement or stress on valves.
Are you cliaming that Magnum has brass valve guides? Perhaps the larger ones, but not the smaller sizes? Not sure they are needed either, not that much movement or stress on valves.
06-08-2012, 03:46 AM
#59
RE: Thunder Tiger 4 stroke engines...any good?
ORIGINAL: the pope
Ah you got me thinking I just had a look at the 91 Ive got and couldnt be buggered to take the muffler off and cant tell by removing the rocker cover . What the jist of my post meant to convey was that if magnum can have brass valve seats chrome liner , bushes on the conrod etc and still be able to sell at a budjet price then im sure the other manufactures can also do the same at their higher price .I know japan isnt china but how much can these things cost ? I dont know if the modern O .S will last as long as the old surpass for example , maybe someone with one with a hell of alot of hours could chime in . I may well be peeing into the wind but its what Ide sooner pay my $ on . Cheers the pope
ORIGINAL: Sport_Pilot
Are you cliaming that Magnum has brass valve guides? Perhaps the larger ones, but not the smaller sizes? Not sure they are needed either, not that much movement or stress on valves.
Are you cliaming that Magnum has brass valve guides? Perhaps the larger ones, but not the smaller sizes? Not sure they are needed either, not that much movement or stress on valves.
I don't think anybody currently uses chrome liners on ringed engines. But you can have a hard liner with nitrided steel. OS doesn't use them, probably because it makes for a longer break in. Ithink Saito and TT probably have the hardestliners. But I am not aware of any brass valve guides, though maybe there are on some of the large four strokes.
06-08-2012, 04:46 AM
#60
RE: Thunder Tiger 4 stroke engines...any good?
I have a Magnum .30 FS with phospher bronze valve guide/seats. Saito has hard chrome liners and Enya now makes a .36 FS with a chromed aluminum liner.
06-08-2012, 04:49 AM
#61
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RE: Thunder Tiger 4 stroke engines...any good?
ORIGINAL: Sport_Pilot
I don't think anybody currently uses chrome liners on ringed engines. But you can have a hard liner with nitrided steel. OS doesn't use them, probably because it makes for a longer break in. I think Saito and TT probably have the hardest liners. But I am not aware of any brass valve guides, though maybe there are on some of the large four strokes.
ORIGINAL: the pope
Ah you got me thinking I just had a look at the 91 Ive got and couldnt be buggered to take the muffler off and cant tell by removing the rocker cover . What the jist of my post meant to convey was that if magnum can have brass valve seats chrome liner , bushes on the conrod etc and still be able to sell at a budjet price then im sure the other manufactures can also do the same at their higher price .I know japan isnt china but how much can these things cost ? I dont know if the modern O .S will last as long as the old surpass for example , maybe someone with one with a hell of alot of hours could chime in . I may well be peeing into the wind but its what Ide sooner pay my $ on . Cheers the pope
ORIGINAL: Sport_Pilot
Are you cliaming that Magnum has brass valve guides? Perhaps the larger ones, but not the smaller sizes? Not sure they are needed either, not that much movement or stress on valves.
Are you cliaming that Magnum has brass valve guides? Perhaps the larger ones, but not the smaller sizes? Not sure they are needed either, not that much movement or stress on valves.
I don't think anybody currently uses chrome liners on ringed engines. But you can have a hard liner with nitrided steel. OS doesn't use them, probably because it makes for a longer break in. I think Saito and TT probably have the hardest liners. But I am not aware of any brass valve guides, though maybe there are on some of the large four strokes.
06-08-2012, 05:00 AM
#62
RE: Thunder Tiger 4 stroke engines...any good?
ORIGINAL: controlliner
I have a Magnum .30 FS with phospher bronze valve guide/seats. Saito has hard chrome liners and Enya now makes a .36 FS with a chromed aluminum liner.
I have a Magnum .30 FS with phospher bronze valve guide/seats. Saito has hard chrome liners and Enya now makes a .36 FS with a chromed aluminum liner.
Are you sure about the Magnum 30 as Ihave one and don't recall seeing a brass guide when Ihad it apart. I should have said chrome steel liners as he was talking about Magnum's.
06-08-2012, 07:19 PM
#64
RE: Thunder Tiger 4 stroke engines...any good?
I don't recall seeing valve guide or valve seat inserts on the Magnum 52 when I disassembled it last year. The valves were right on the cylinder head. Unless I'm blind or something.
06-09-2012, 12:20 PM
#66
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RE: Thunder Tiger 4 stroke engines...any good?
The valves were right on the cylinder head. Unless I'm blind or something. 
06-09-2012, 01:14 PM
#67
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RE: Thunder Tiger 4 stroke engines...any good?
All my ASP (Magnum/SC/Sanye) thumpers have bronze valve guides/seats and fully ballraced camshafts. Engines are the .30, .52 and .91. I can assure the cylinders on these are also plain steel, no chrome on Sanye's ringed engines.
Regarding the topic, I wouldn't mind getting myself a TT .75 or .91 for my personal collection, from what I've been reading here over the years, they seem to be ok.
Regarding the topic, I wouldn't mind getting myself a TT .75 or .91 for my personal collection, from what I've been reading here over the years, they seem to be ok.
06-10-2012, 06:09 AM
#68
RE: Thunder Tiger 4 stroke engines...any good?
Looking at some photo's and apparently the guide and seat are not visiible from the valve cover and can only be seen when the valve is removed. Alsosome are recessed so only a small area is touching the valve seat. Looks like it would be easily missed if not looking for it.
06-10-2012, 01:13 PM
#69
RE: Thunder Tiger 4 stroke engines...any good?
ORIGINAL: Sport_Pilot
Looking at some photo's and apparently the guide and seat are not visiible from the valve cover and can only be seen when the valve is removed. Also some are recessed so only a small area is touching the valve seat. Looks like it would be easily missed if not looking for it.
Looking at some photo's and apparently the guide and seat are not visiible from the valve cover and can only be seen when the valve is removed. Also some are recessed so only a small area is touching the valve seat. Looks like it would be easily missed if not looking for it.
