stunthanger.com
Speed,Combat,Scale,Racing => Rat Racing and Team Racing => Topic started by: frank mccune on January 20, 2015, 04:45:22 PM
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Hi:
Did the ST G15/.19 engine have a flat top piston or a baffled piston?
Tia,
Frank McCune
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YES ;D .
The G15 / 19 FI is a 16 x 16 version of the G-15 FI ( with the bypass knocked in with a nuber stamp ' 19 ',
though some have the 19 on the mount edge and retain the ' 15 ' .
They came out about 65 , so theres various cases , though to the R/C square & round 72 odd on case with
the muffler mounts . Theres ALSO a G15/19 CAR , with single BR , front Bush , and 1/4 prop shaft instead of 5m.m.
the other internals are the same .
Theres also a ( rare ? ) G 20 19 , similar to the G 20 23 , with baffled piston ?? maybe ?? .
(https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcSRdLt4xUbuUvygHjEOEjknVa1RKJNMOKVamG839uxL2F0AotX10w)
R/C one , CAR version looks same bar crank nose . G 21 collet and G 20 prop driver fits .
(http://thumbs4.ebaystatic.com/d/l225/m/mBQCcbNbSu4VFT6PNE4OGKQ.jpg)
1965 odd sucker .
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(http://static.rcgroups.net/forums/attachments/1/5/7/4/9/a5606592-60-G20%2019%20002.JPG)
Id presume :o a FINNED head on one of these ( G 20 ) was BAFFLED , and plain - flat top . maybe . >:(
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Stamp on the mount .
(http://www.micromeccanica.altervista.org/micromeccanica/super_tigre/Pagine/x_15_19_f.i._files/Media/IMG_0527/thumb.jpg)
cept its a X , unless its got a G 15 exhaust port , in which case its a X case G-15/19 ( yea , theres such a thing -
as a X 15 / 19 anyway ) Real X's have narrow square Ex. Port .
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Hi:
From what I can determine, the G 20 .19 and .23 engines had a baffled piston with a single rear bearing. The G 20 .15 had a flat top piston. I have a G 20 .15D that that has a flat piston and several G 20 .23 engines that have baffled pistins.
The G 15 engines had flat top pistons in the .15 and .19 displacements or did the .19 have a baffled piston?
Am I correct in thinking this way?
Tia,
Frank McCune
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I had six G15's, all flat top pistons.
They didn't perform all that well, unless under-propped so they over-revved. Then they ran good until the rear bearing self-destructed. We were never able to find a heavy duty upgrade.
The upgraded bearing were found inside Rossi, Cox and Nelson engines.
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Mat pretty much has it all correct