Ark1

Please see picture.

I sent the irons out to be resurfaced. Should I scuff the finish with my Diamond Lap in a Cross hatch pattern or go with the existing finish?

Also .003" was taken off of each face of the irons, the engine will now be .012" shorter, is this a problem? Should I lap the thrust bearing and remove .012" from it?

Thanks.


Ark1.

dcrews

iTrader: (2)

I wasn't aware you could resurface the irons.. Learn something new every day

diabolical1

iTrader: (3)

pardon the ignorance, but why wouldn't you just adjust it with another spec of end spacer? i never heard of lapping a bearing.

SpeedOfLife

iTrader: (16)

yeah you just use a different end spacer.

Ark1

Thanks for the reply, ( Pardon my ignorance) being a piston engine minded builder the thrust bearing normally is just a flat plate. Lapping .012" off of the back of it isn't a big deal.

From your comments I realize that the rotary uses a spacer or sleeve, now in my case will be too thick. I can easily lapp .012" off of the spacer to bring it into spec.

Thanks. I see now where the thrust is being adjusted.


Ark1.

diabolical1

iTrader: (3)

LOL. perfect example of internet miscommunication. we're both on the same page now.

RotaryEvolution

iTrader: (30)

leave the surface alone

you also don't need to lap any bearing, the thrust play will not be affected.

farberio

iTrader: (7)

Even then wouldn't you want a bigger spacer to remove endplay? By using a bigger spacer you will return the length that you lost and the eccentric shaft hasn't lost any length.

Ark1

I think you are right I will need a larger spacer to take up the slack that has been removed from the Irons.

Thanks for the comments, I am just learning this Rotary engine, been working on Piston engines way to long. I am doing this for my son, he has a first Gen GSL SE and I have a spare 86 engine. That engine is the one I am rebuilding, I have purchased everthing to MegSquirt it too. Never done MegSquirt to a rotary, but a piston yes.

Here are a few pictures of the first Rotor in the housing. I sent the housing out to Goopy Performance in New York, Johnathan is great to deal with. Turn around on the housings was about 2 weeks to Canada and Back. I am in no hurry.

The Irons were done locally. The machinist said that the housing was out .003" from
Parallel and was corrected on the front face. ( Oil pump face ) Most likely this was an allowable tollerance from the factory.

Thanks again for the comments and setting me straight on the thrust spacer.

Ark1.