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Search: Posts Made By: tkg
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Forum: Engine Conversions
06-29-2009, 07:48 PM
Replies: 148
Views: 34,109
Posted By tkg

RE: Convert GMS 120 glow to Gas

If the comments about the pump line were not made, what do you think the odds are that the engine would have installed in the plane that way.
To many people have the attitude of what is the MINIMUM...
Forum: Engine Conversions
05-27-2008, 09:39 AM
Replies: 148
Views: 34,109
Posted By tkg

RE: Convert GMS 120 glow to Gas

A ring is pinned so that the end gap is ALWAYS on a solid part of the cylinder wall. If you installed the piston turned 180 degrees when you reinstalled it, then maybe the end of the ring was passing...
Forum: Engine Conversions
05-26-2008, 11:55 PM
Replies: 148
Views: 34,109
Posted By tkg

RE: Convert GMS 120 glow to Gas

Is the ring pinned?? If it was, maybe you got the piston in backwards and the ring gap caught a port.
Forum: Engine Conversions
12-11-2007, 01:07 AM
Replies: 148
Views: 34,109
Posted By tkg

RE: Convert GMS 120 glow to Gas

Tuning hintsset timing to 30 Degrees BTDC, adjust carb way rich THEN lean for max power using a Tach.
Is your ignition a syncro spark?? Or are you using fixed timing?.
What sized prop? Did you...
Forum: Engine Conversions
12-07-2007, 08:51 PM
Replies: 148
Views: 34,109
Posted By tkg

RE: Convert GMS 120 glow to Gas

Borna, your getting closer. A degree wheel reads 0 degrees at TDC if you do it right. Your plan will work IF you can tighten the collet/hub with out it moving on the crank.
Often times its easier...
Forum: Engine Conversions
12-07-2007, 10:33 AM
Replies: 148
Views: 34,109
Posted By tkg

RE: Convert GMS 120 glow to Gas

Don't know how all the different ignitions work for advance/retard. BUT the CH unit is a retarder. So you set the timing to the full advanced position and the ignition computer RETARDS the timing for...
Forum: Engine Conversions
12-06-2007, 09:35 PM
Replies: 148
Views: 34,109
Posted By tkg

RE: Convert GMS 120 glow to Gas

Close but no cigar.
Find TDC, set pointer to 0 degrees. Hook up ignition, ground spark plug to engine, turn on ignition. THEN rotate the prop hub in the direction of normal rotation. When you hear...
Forum: Engine Conversions
12-06-2007, 10:40 AM
Replies: 148
Views: 34,109
Posted By tkg

RE: Convert GMS 120 glow to Gas

So put the head on. This isn't Rocket Science.
If your building a V-8 with DOHC then a dial indicator is a must have.
If your building a full blown racing 2c than a dial indiactor is way good,...
Forum: Engine Conversions
12-06-2007, 12:02 AM
Replies: 148
Views: 34,109
Posted By tkg

RE: Convert GMS 120 glow to Gas

The only problem with a dial indicator is when the plug is slanted. Then all you can use is a piston stop.
The dial indicator works great is you use .050 or more down the bore.
But a cobbled up...
Forum: Engine Conversions
12-04-2007, 08:34 PM
Replies: 148
Views: 34,109
Posted By tkg

RE: Convert GMS 120 glow to Gas

The universal magic timing number for 95% of our engines is 28-30 D BTDC.
The oddballs are the YS engines and some of the older big tigers on gas. The YS likes 25-26 and the ST's 26-28
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