anyone who has built an engine using molnar crank and rods, i would like to know how the machining tolerances were as far as where your bearing clearances ended up at? did you use standard bearing and get the clearances you wanted or did you end up tight or loose? thanks

You could ask Tom himself about machining tolerances. His username is MT-Tom
I just ordered a crank from Molnar myself but haven't received it yet.

i need to get some main bearings to see how they fit the aluminum caps as my block is in the shop. im thinking about ordering bearings +1 over size for extra clearance. this may save paying for machine work on crank. i need at least .003" clearance on the mains any how.

I purchased a Molner Crank from Todd at Competition Wedge Engines who was recommended by folks this site. He balanced and measured everything up on the crank. I measured everything on the block and was able to spec the bearings. I did buy a couple of the half increment bearings (I think that is what they are called), just in case. Everything came out perfect. I don't recall all the measurements as I assembled the block last year.

i understand bearing clearance will be tight with std bearings using molnar crank and rods. thanks

I just installed a stroker kit that I ordered from Ray Barton. It had Molnar crank and rods. The specs were good.

Are the caps already fit to the block?

no they are not. i still have to drop off the caps.

Then buy your bearings and drop them off, along with the crank, and have the shop set your clearance .

well, thats been my idea. just trying to possibly save on extra machine work if thats possible.

He can/should set the clearance when he fits the caps, no machining needed on the crank unless there is something wrong with the crank specs ...

ok, sounds good. fixes that issue.

So would you order bearings together with crank/rods (standard size?) or separately?

Not to get off track but I see your from Graz Austria DGS.
I worked for magna there a few times
Never though I see a mopar enthusiast from there.

That's funny, when I was still in college I used to work there over the summer

No. Just ordered all bearings today. Went with king for the cam and rods. They are a h bearing. Clevite p bearing with full groove for mains. Yet to buy crank and rods. Have not made up my mind on the molnar stuff yet. Looking for excellents in machining if that exists.

I'm thinking about mb5116hp bearings for the mains and cr808hpn for the rods (both from king).

My machinist was amazed at the quality!

My 4.25" crank and 7.1" rods get beat on almost daily in my 505.

I just checked all my Molnar rods this weekend. All pin bores were with-in .0001", all rods with bearings installed were +/- .0002" but I did not measure the rods and bearings separately. Clearance depends on what your crank is. Mine would have been .0021-.0022 with a standard 2.2000" journal with a coated Clevite 743HN CL77. I have no idea how thick the coating is as they were done before I received them. Total weights were with-in .9 gram except one 1.4 gram.
Doug

cr808hpn is what i ordere. Fits 2.200 journal. 533hp for the cam if i remember correctly.