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Good news then BAD news!!! Help!

Hey guys if the Kings aren't good for 6.x's let me know please! Nothing else will ever go in my race motors!

So before I order the new ones y'all let me know![/QUOTE]


King bearings are real good bearing, but not for extreme compression engines like the 6.2 and 6.5. There are a few engine builders out there who use King bearings and they know the Kings will wear out in less than 25K. I had the great enjoyment of my engines rotating assembly turning to junk because Diesel Depot used King bearings. A few dollars more, for the other half of the engine to have Clevites and I would still be running that engine. Number 7, King bearing, looked like a penny on a railroad track. And that took out number 8. Paul showed the crank. Not sure of the correct spelling but King says their bearing have 'extreme imbedability' and again they work great for gas engines.

But your call!
 
Was those the cheaper line of Kings or the high end ones they sell?

You guys are probably very right but I am still torn here. I had some major issues starting a few years back. It started when I would have to buy 2 sets to make one set from for clearances. That sucked but hey I figured it would just have to be part of building a serious race engine. Then I had the real problem. Built a 421 ci for a customer. Real nice piece. At the track he had ignition troubles in hot laps(practice). He borrowed a dist and and we was setting timing and it seized up. Was idling! Break in was done right, no issues and 80 psi at 1900rpm. Upon tear down the final coating on the rod bearings had flaked off! I wasn't the only one! Williams Precision Engines north of Indy....6 sets! Indy Machine...1 set. Worral's speed shop 3 sets. The place where Greg Walp works(memory needed LOL) had 2. That history with Clevites scares me. The Mod engine I build are far from diesel compression but 14 and 15 to 1 is big for an sbc.

How bout a compromise? Federal mougal? ACL? other brands? lol

I trust y'all and will use Clevites if you say I should.
 
Heck GM bearings go a couple hundred thousand.. I don't know if they were using a 'supplier' or not..

I've heard, just heresay, that GM Oe cranks are hardened and/or coated.. I do not know if Scat does anything to theirs.. Re-grinding a GM 6.2/5 crank is generally frowned upon.. But I've personally never run an under sized crank in these engines..

You DO run an oil cooler, right?
 
Yes I do. But I always yank the factory lines and use AN fittings and so on like my race cars. I do have a perfect stock crank thats well within spec. That may become my route.

I have had some serious issues with Clevite but then again the race motors require perfection in the 2 super competitive classes I build for. And then a bad batch of race series bearings got out and caused havoc on me and many many other builders.

I like saving money but not on something like this. I have a ton of cash and way more time in this build and I should be driving and enjoying it.

I wonder if its possible and viable to order OEM bearings from GM? Would they be from a second source or from the original company?
 
I had 3/4 groove bearings in my 6.5,I think they were Federal Mogule. Clevite only offers 1/2 groove. I think King only has 1/2 groove also.
 
Had to let her sit for a while so I could round up cash for a down payment on a house! Selling a big truck and will have enough left over to fix this one! Gonna go with the scat crank and the Federal Mogule bearings. Thinking about the girdle too. Y'all think I should? I can fab it. I will need studs for it though right?
 
Yup on the studs. BTW, Clevite, Federal Mogul and TRW are all one company now and have been for a few years. All this corporations buying out corporations for their brand names thing. The biggest problem now is that everybody is having their "American" brand parts manufactured in Mexico or off shore in a Third World country like China, Taiwan, the Philippines or Malaysia. Even "brand name" stuff anymore is a crap shoot for quality unless you know for certain it's made here - and even that's a crap shoot whether it's made by quality craftsman or minimum wage workers in a "right to work - for less" state. Personally, for the SBC's I've built over the years, never had problems with either Clevite 77's or FM's tri-metals. Diesels are a whole other beastie. As for OEM ordered from GM, those are made for them by an outside supplier, one of the three listed above but I can't remember which one, I think TRW. Scat crank good choice, their cast steel crank is far better than the OEM cast iron one for strength.
 
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