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Search: Posts Made By: simone76
Showing results 1 to 17 of 17
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Forum: Gas Engines
02-18-2015, 09:02 AM
Replies: 1,678
Views: 462,290
Posted By simone76

bought the very same item from SDSHobby and it...

bought the very same item from SDSHobby and it slips on well on my GF38i, did'nt tested it on flight yet.Hope not much power loss since it is already pretty marginal on my heavy seaplane.
Forum: Gas Engines
10-19-2014, 10:32 PM
Replies: 1,678
Views: 462,290
Posted By simone76

The ignition trigger is on drive shaft, the dot...

The ignition trigger is on drive shaft, the dot is on cams shaft. There is no way changing valve timing will affect ignition timing to the piston. Have some mumbling with this engine in hands and...
Forum: Gas Engines
10-18-2014, 11:47 AM
Replies: 1,678
Views: 462,290
Posted By simone76

Nope. Advancing the cam shaft causes the Inlet...

Nope. Advancing the cam shaft causes the Inlet valve to open a bit earlier.
Forum: Gas Engines
10-18-2014, 11:02 AM
Replies: 1,678
Views: 462,290
Posted By simone76

I'm experimenting on valve timing. That has...

I'm experimenting on valve timing. That has nothing to do with Ignition timing. It is matter to play with valve opening to get the most mass of air/fuel mix in the cylinder for best performances.
Forum: Gas Engines
10-18-2014, 10:55 AM
Replies: 1,678
Views: 462,290
Posted By simone76

To me it seems so. Yyou can see that in picture...

To me it seems so. Yyou can see that in picture and, to me the cam has a slightly different shape also. BTW im seeking for the best valve timing by trials... then will report.
Forum: Gas Engines
10-18-2014, 10:39 AM
Replies: 1,678
Views: 462,290
Posted By simone76

With valve timing advanced by 1 tooth, it passed...

With valve timing advanced by 1 tooth, it passed from 6600 to 7050 rpm with biela 18x8. Will test fly it like this because ran out of time. In future i will test a tooth ahead more.
Anyone uses a...
Forum: Gas Engines
10-15-2014, 12:29 PM
Replies: 1,678
Views: 462,290
Posted By simone76

i recognize doing this i advanced it. Well,...

i recognize doing this i advanced it. Well, anyway i wanted to try both one tooth ahead and one tooth backwards. Btw here is a pic of original cam shaft with the newer one. Cams have slightly shape...
Forum: Gas Engines
10-15-2014, 10:53 AM
Replies: 1,678
Views: 462,290
Posted By simone76

exactly, moved dot a tooth away from propeller...

exactly, moved dot a tooth away from propeller when it is at bottom. Will try to move a tooth forward and see. It became a challenge, i prefer having fun with cheaper engines than messing with...
Forum: Gas Engines
10-15-2014, 09:06 AM
Replies: 1,678
Views: 462,290
Posted By simone76

moved cam shaft 1 tooth backwards, lost more than...

moved cam shaft 1 tooth backwards, lost more than 1000... will try to move a tooth in the other direction. It's becoming a challenge.
Forum: Gas Engines
10-12-2014, 09:49 AM
Replies: 1,678
Views: 462,290
Posted By simone76

no luck still, didn't change the cam timing yet,...

no luck still, didn't change the cam timing yet, switched to a 18x8 2 blades biela and only managed to get 6600-6700 rpm, even playing with ignition timing. I don't understand this lack of...
Forum: Gas Engines
09-30-2014, 02:36 AM
Replies: 1,678
Views: 462,290
Posted By simone76

actually i tried moving the pickup and the max...

actually i tried moving the pickup and the max rpm i managed to get been just slightly over 7000rpm as stated. There must be something else... what cam timing has who got more rpm? Where the cam...
Forum: Gas Engines
09-28-2014, 04:24 AM
Replies: 1,678
Views: 462,290
Posted By simone76

with new cam shaft, some dremel work on sharp...

with new cam shaft, some dremel work on sharp edges in intake section, playing with needle settings and ignition timing only managed to get 7050rpm at maximum, with biela 16x10 3 blades. Hoped...
Forum: Gas Engines
09-12-2014, 04:38 AM
Replies: 1,678
Views: 462,290
Posted By simone76

While still available, I recently grabbed a new...

While still available, I recently grabbed a new cam shaft, since it seems this part gets worn fast. I noticed the new one gives a more advanced valve timing compared to the old one. I didn't take any...
Forum: Gas Engines
05-06-2014, 08:21 AM
Replies: 1,678
Views: 462,290
Posted By simone76

Yes, it should be the very same model as ESM,...

Yes, it should be the very same model as ESM, here in mainland Europe it is (was?) sold by Planet Hobby. I will take some pictures as soon as i take canopy off: have to check what's wrong: on past...
Forum: Gas Engines
04-15-2014, 10:28 PM
Replies: 1,678
Views: 462,290
Posted By simone76

I tried the Biela 3 blades 16x10, getting around...

I tried the Biela 3 blades 16x10, getting around 7200 rpm on my still new gf38, 700 more than the 19x10 i used for the maiden. Bit less pull in the air but far better idle.
...
Forum: Gas Engines
02-27-2014, 09:47 AM
Replies: 1,678
Views: 462,290
Posted By simone76

Thanks! i missed it before

Thanks! i missed it before
Forum: Gas Engines
02-26-2014, 11:59 PM
Replies: 1,678
Views: 462,290
Posted By simone76

Hello, the cam shaft popped off my standard gf38...

Hello, the cam shaft popped off my standard gf38 before i could check the mark alignment. Can someone show me how the mark should be aligned to get proper cam timing please?
Thanks in advance
Showing results 1 to 17 of 17


 
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