Best Crankshaft Choice

[John]

It was a great price, I just fell into the trash and came out lucky.
John

[mecompco]

I thought the 50 I paid for a good 4.2 was a great price.

That's great--no machining required? With my luck I'd likely still have to pay out for that on top of the price for the used crank.

[mecompco]

Cool! I'll specify I want the 4.0 main bearings. Thanks for the info.

It will come with the 4.2 bearings. I dont know if you can choose which bearings you want.

Which, as I understand it, we don't want to use. That's too bad--bearings are what, another $50-$70?

[oletshot]

One thing to remember is the 4wt crank was used to drive auto's and manuals alike. It will work for both, so I personally wouldn't panic if you came across a 4wt for a good price or like in John's case "free", well almost free. If you have a choice then choose the one that works best for you. By the way 4.0 liter crank is a 4wt isn't it (I didn't count my weights, I KNOW it's not 12)?

As far as bearings go, the easiest way to get bearings that fit, is to order the ones for the year of your block. '87-'90 4.0 and 4.2 blocks use the same bearings. From what I understand it's the tab location that changes between years. I prefer Clevite myself, but probably because I like how the "tri-metal" hype reads more than actual experience between brands.

[fedrusion]

50 is a great deal but 5.50 is simply amazing?

[aaronkeiser]

Hey I was counting the number of counter weights on my 258 crank and it looks more like it has 6...2 in the middle next to each other then 2 on both ends. By the way, does anybody have a picture of the 12 counter weight one, i've read about it, and id like to see what the illusive crank looks like. Possibly compared to the other one.

[76CJ5]

Hope this helps. I don't have a mic. right now but I'll help in the comparison if I can.

[aaronkeiser]

Thats pretty cool, 2 counter weight per piston. I wish I could have found one of these to use in my motor now but the amc eagle was the only 258 I could find the day at the junkyard. We'll I'm almost certain this won't be my last stroker I help build since my dads buddies have heard what we're doing and now they want us to build them a stroker.