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Long Rod 2300 and Patina


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Would your friend be willing to give the specs on what rods and pistons are used? I just purchased a L20b block and Z22 crank but haven't decided what pistons/rods to use yet and would like his insight. I'm aiming for 180-200hp so that sounds reasonable with his setup. 

 

Thanks for any info you can get!

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It's no secret how to build one of these. The rods are N85 casting out of a Z20. That motor used two different rod lengths so make sure they have the correct casting number.

 

The pistons are 89mm bore custom forged pistons, so you will need to do some engine math and call a piston manufacturer to discuss details, or just call Rebello Racing and buy a set from them.

 

Unfortunately, unless your L20B block is an "M2" casting, you probably won't be able to bore that large. The later M2 block has thicker cylinder walls. The preferred block is a Z20, but you can use a Z22 block in a pinch. The problem with the Z22 block is the steam holes in between the bores. Going to 89mm with that block, the machinist needs to be aware of them and bore away from them (offset bore), and even then, he could miss and bore into them.

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