Hi guys, I need help with calculating right bearings from Honda. I read hundreds threads, I understand some things, but there is still some questions I need to ask.

Block - D16V1.
Crankshaft - D16Z6.
Rods - Aftermarket for D16, with ARP studs.

I measured rods, and crankshaft, but I'm not sure if ordering blue bearings from Honda will give me right tolerances, so I thought maybe using ACL, but there is 2,3 options from ACL, and I'm not sure which one I need, so please help with calculating, and advices.

It's in milimeters, because I'm from europe, thats one of the reasons I have slightly trouble understanding old threads, because they're in inches.

Rods - 48.005
Crankshaft - 44.800.

Oh, rods were torqued to 38 Nm. Maybe should torqued it more?

What is your advice, running blue bearings, or ACL? But Which ACL, I have +0.025, and 0.25, and 0.5.
Pistons are Vitara, 75.5, if I manage to build this engine and make 10 000 km with it, I would like to go to the turbo path, but small turbo, maybe 200HP. I dont know is that is important to say.

 

Clearances must be checked at original machined torque specs. Aka, if you over torque a journal, you make it less round, and it requires a line hone.

Clearances between 0.0016-0.0025in should be fine for mains and rods.

The dark art to setting bearing clearance involves sanding material from the back of the bearing until you get a measured oil clearance to your liking.

If the crank wasn't turned, you likely don't need thicker bearings. Oversize bearings are generally meant to be used when the main or rod bearing housing's journal gets made larger. An oversize bearing is then required to maintain the same amount of bearing crush.

You probably want standard, or xtra clearance. Seems thats what I end up needing most of the time. I like going with slightly larger oil clearances than Honda, giving it a little more tolerance and oil-film cushion to make more power than stock.

Hope that helps.

 

I understand what you are saying, but still, I measured and calculated, so I'm not sure what should I order, I think if I order blue, it will be too big gap, and if I order ACL +0.25, it will be too tight, and I don't want to do any kind of machine work to crank, so right now I'm not sure what to do.
And I need to find torq spec for these ARP studs.