enya 4strk on diesel
11-11-2013, 07:09 PM
#26
11-12-2013, 06:22 AM
#27
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OK QS, the vales in the .46 MKII are the same size approximately 8.30 mm It had no head shim in it, I found one close but a hair too small. It will have to continue to be without one. As you can see it's all set up to mount on an ACE 4-40, it will be a perfect match. It has a new BOCA cam drive bearing it, that's why its almost clean. All the rest of the bearings are original.
PS, I tried both it and a .53 TN i used to own on Davis ABC mix and neither would even make a puff of smoke.
PS, I tried both it and a .53 TN i used to own on Davis ABC mix and neither would even make a puff of smoke.
Last edited by Hobbsy; 11-12-2013 at 06:28 AM.
11-12-2013, 09:30 AM
#28
Thanks for the pictures. The 46-4C was and is one of the strongest glow 4-strokes in that displacement class. I can't recall but I think both of my 4-strokes have no head shim. Raising the compression would involve shaving the liner down or milling the head.
11-12-2013, 10:40 AM
#29
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After I posted the last post I remembered something, I did run the Enya .53 TN on Davis ABC mix, it would only start using a starter and would only run at full throttle. Any less than full throttle and it would slowly die and quit.
11-12-2013, 11:04 AM
#30
Is there more or less ether in the ABC mix versus the other "versions"? I would think adjusting the ether content higher would net better results. Maybe this is Bowman ring territory; the stock Enya rings have a huge gap which I'm sure causes a small loss of cylinder pressure.
