Higher compression + timing advance

[ruthless_one3k]

I am in the process of putting a spare motor together. It is a stock stroke stock jug bored .080 over with a mild port(I don't know who did it it was done when I got it) and the head has been shaved but not re-chambered I'm not sure how much though, the last time I ran this jug it was on 93 octane @ 40:1 with Amsoil Dominator and it seemed to run fine. My question is would it still be a good idea to do the timing advance with this motor if I don't want to go over 93 octane?

Also I don't know whats going on with my Con rod. It is a veserah Rod on what I think is a stock crank there are no spacers under the jug and the head is not notched. But I had to file the opening on the case to let the rod pass through kinda like with the vitos stroker. Any body ever run one of these before?

 

[pittboss45]

The Vesra rods do not grind/finish the rods well and I have had to clear some things so that they can rotate.

As far as the timing, you could go +2 degrees and be safe.

 

[ruthless_one3k]

Thanks a lot, I'll try that.

 

[FLOTEK]

IMHO dont just assume your golden cause it ran good before ,it would be a good idea to measure the squish clearance using solder ,you could be on the ragged edge and the extra ignition timing might push you over into the danger zone of a seizure
it only takes a minute to check and not worth the potential risk in my eyes,once you have that number you will know if its safe to do .

 

[ruthless_one3k]

Well, I'll just leave it stock for now since I already got the head on and I was in a hurry to get it put together before I had to leave, so I didn't bother to file the hole yet since I dont know for sure that the stator I grabbed even works. I'll wait till I get a new gasket before I go trying to take the head off since this gasket was already used once. But when I do I'll check the clearance.

 

[FLOTEK]

t o check squish you leave the head on ,you use a section of 1/8 solder down in the spark plug is all,no need to tear anything apart ...takes like 2 minutes

 

[pittboss45]

Please don't re-use an old gasket that has on a running engine.

 

[ruthless_one3k]

t o check squish you leave the head on ,you use a section of 1/8 solder down in the spark plug is all,no need to tear anything apart ...takes like 2 minutes

Thanks, I never heard of that but, its a good idea. I'll check it when I get a chance.

Normally I would never re-use a head gasket but this build was kind of a spur of the moment thing and I didn't want to wait for a gasket to come in to finish it up. I will be putting a new head gasket on it before I go anywhere on it other than around my yard. I think I have a new gasket around here somewhere but I don't remember where I put it and I dont know if it was for a stock jug or a 240. I also need to buy a stator cover gasket, since that is the only thing I didn't have an extra one of.