383 rod / main bearings
- Thread starter Darren
- Start date
-
Yes. That's a good choice. I am not aware that anyone offers a kit with all of them though. I don't kits for this specific reason. With a kit, you are limited to what someone else wants to include. Buy your parts in pieces. It may end up costing a little more, but you can put together the quality parts tat you want, instead of what somebody else wants to make money on.
I forget which myself. I always have to look it up or call Summit. Whichever ones are for street use. There's a big difference. You don't want to run race bearings on the street. I just cannot remember which is which.
moper
Well-Known Member
If you are going for factory type build - meaning low and mid rpms, some performance use but not high rpm or hard racing - then you might be better served by using the Sealed power (Federal Mogul) CP series rod bearings and MA series mains. Clevite tends to be more race oriented in terms of construction & eccentricity. FM is more factory type stuff and will perform better and live longer in my opinion in a street type build.
I never have torn down any factory original engines with Federal Mogul bearings, but I have torn down a slew of original engines with Clevite bearings. I guess all of those were factory race engines.
Fisher
Old Guy with a Cool car.
Best Bearing out there in my opinion. Thats what we used in My new build.
I was going to ask if mopar ever used clevite in the engines, because i am pretty sure my 68 383 has never been taken apart. When i tore her down it had clevite rods and mains. So maybe they are origanal? Thanks
RzeroB
Well-Known Member
The Clevite 77 bearings have been the standard bearer for a long time. I've been using them since the early 80's and they always hold up well and have given me no problems
txstang84
Well-Known Member
If I read the descriptions correctly, H series Clevite bearings would probably be your best bet for a street going engine that doesn't see much high rpms. Also, there shouldn't be a need to chamfer the sides since they're made for generous crank/rod journal fillets.
The P series are for high operating rpms according to the descriptions.
The P series are for high operating rpms according to the descriptions.
More than likely they were.
moper
Well-Known Member
Where did I say FM was a factory supplier? I said "factory type stuff". Factory type were not tri metal material on the rods that were narower for bigger fillets, or mains with more eccentricity or more than 1/2 groove.
Sealed Power/FM makes a 1/2 groove, low eccentricity main bearing which is closest to what came in factory engines that is $18/set less than the Clevite. The Sealed Power/FM tri-metal rods are $32/set less than Clevite. Clevite makes a good bearing - but in a stock type rebuild have features you're paying for that you don't need.
Sealed Power/FM makes a 1/2 groove, low eccentricity main bearing which is closest to what came in factory engines that is $18/set less than the Clevite. The Sealed Power/FM tri-metal rods are $32/set less than Clevite. Clevite makes a good bearing - but in a stock type rebuild have features you're paying for that you don't need.
txstang84
Well-Known Member
In the context of engine speeds, Clevite states their P series bearings are for "high rpms" and H series are for "mid to high rpms", but they don't quantify the statement. I would *assume* (here we go!) "high rpms" would be somewhere north of 5500, and "mid to high rpms" would be 4000-5500. Would that be a fair assertion?
Also, you mentioned the SP/FM MA type main bearings. When I read up on those, they're bi-metal aluminum/silicon bearings. I seem to recall some other debate about this in other threads as to whether or not these are suitable for anything resembling performance engines because of the lack of embedability...or, I might've misinterpreted the text elsewhere...
Also, you mentioned the SP/FM MA type main bearings. When I read up on those, they're bi-metal aluminum/silicon bearings. I seem to recall some other debate about this in other threads as to whether or not these are suitable for anything resembling performance engines because of the lack of embedability...or, I might've misinterpreted the text elsewhere...
Never said you said that. I just said I had never torn down an original engine with FM bearings but plenty with Clevites.
Even FM makes different type bearings. Not all FM bearings are for street use, either. That's why it's best to consult either the bearing manufacturer or a good source such as Summit to see which type is best for your intended use.
From my ROD BEARING reseach the H series cost twice as much as the P series. You think the cost would be more for the P series?
txstang84
Well-Known Member
Wow-twice as much? That's surprising.
-
Similar threads
- Locked
