Need Engine rebuild gurus help Please
 

Hi im building a 3.2 mild race engine and have a crank that is in spec,case that is in spec but the NEW Glyco std bearings are under spec .004 to .005 ".( when measured by Plasigauge or micrometer .i want to get back to .002"
Does any one know the thickness of the red ,yellow or blue GT3 main bearings?
Are these thicker than std Glyco replacement bearings?
It has been suggested that try the Blue Gt3 bearings?
Thanks John

John, I don't know why folks are not responding, but you may want to try just calling Steve Wiener or Henry at SuperTec. They are both very helpful can explain in much more detail over the phone than on a forum.

When I did my motor, the measured clearances on the mains came out to between 0.0029 and 0.0033, but the Plastigauge averaged out around 0.004. My hot oil pressure is fine though. I'd rather be a bit loose than a bit tight.

Seeking help from engine gurus.......
 

The OP was seeking help from engine gurus. Unless you are a qualified individual to fit the description, your opinion would be valuable. While I had rebuilt about a dozen engines the last 15 years, my experience is nothing compared to these engine gurus. And occasionally get to call these guys for assistance.

Tony

are your bearings too big or too small?

Hi the glyco mains are too small

I had my 993 crank redone by Marine Crank after a spun #5 rod back to Std/Std. I got gylco yellow GT3 bearings that were coated by Calico. My clearances were .0015"-.0018" via plastigage. Majority were .0015" with two being .0018" ie plastigage bigger then .002 but smaller then .0015".

Tony, I was only trying to help the guy out. SlowCar had posted similar question in two other threads and had not gotten a response. I thought I would at least TTT this thread.

Hope you have a better day too.

There is no need to apologize, the OP was asking for an engine guru, not a qualified Porsche technician or racing engine specialist, going by his question in the post all he needs is anyone with the knowledge of the thickness of GT3 bearings and Glyco bearings. A parts counter guy could be all he needs as long as he has the info needed.

What oil pump are you running?

Hi thanks for the replys ,
I am running the std 3.2 pump.
I have ordered a set of gt3 blue . I have found each colour = 0005".
What is the max clearance I should run on this 7000rpm 10.5 :1 comp 3.2 engine on the mains??