DjGreggieP
DjGreggieP Dork
8/22/24 12:48 p.m.

Is there an online resource that would have specifications of OEM connecting rods? 

I am in the process of piecing together the stroker engine for my Intrepid. I have the block (3.2L Intrepid) and the crank (4.0L Nitro) and this has been done a handful of times, (decently documented but most builds suffer from photobucketitis) but they are typically built with either 3.5L connecting rods or 4.0L, neither of which has any stock on rock auto or summit racing and nowhere has the actual specs of them for me to look into something comparable.

I know I can measure the crank and the wrist pin for those sizes if I had to, but I am still stuck on overall length. The listings on rockauto just tell me about how great the (non-existent) remanufactured connecting rods are.

Thank you in advance!

 

P.S.  Is there a formula to find out the length if I have other information like stroke? I can find the stroke online and I could measure the journey of the crank and mark on the cylinder wall and measure on the wrist pin location of the piston if that's going to be the only way. 

 

Driven5
Driven5 PowerDork
8/22/24 1:03 p.m.

1/2 Stroke + Rod length + pin height = Block height - Deck clearance

Rod length =  Block height - Deck clearance - 1/2 Stroke - Pin height

 

stuart in mn
stuart in mn MegaDork
8/22/24 4:23 p.m.

The aftermarket companies have catalogs that list dimensions for particular applications - here's a link to the Carillo catalog:  https://cp-carrillo-catalog.cld.bz/CP-Carrillo-Catalog-Collection/CP-CARRILLO-Product-Catalog

Pete. (l33t FS)
Pete. (l33t FS) MegaDork
8/22/24 6:02 p.m.

Is it feasible to just pick up a core engine for its rods?

DjGreggieP
DjGreggieP Dork
8/22/24 6:59 p.m.

In reply to Pete. (l33t FS) :

Possibly. If I could find one for core pricing. I could yard a bunch from a junkyard maybe. 

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