A to Z Posted October 10, 2022 Share Posted October 10, 2022 (edited) As you know, Nissan offered the 2.8 series 6 as a diesel as well. It has a longer stroked crank (83 versus L28 79 mm). Known as an LD28 or V07, they are now fetching over 1500 dollars each. Well, I got one out of Thailand for 400 bucks. So, I decided to build a stroker L series 6 engine for my Z car! I have the V07 crank, which has 83mm stroke, the L24 has 73mm. So I am gaining 10mm, of stroke! 99% of the guys are using this crank in a 280Z/L28 block to build a huge cubic inch stroker. If I did that, my freshly rebuilt SU 46mm carbs would be too small unless I spent money to have them bored out from 46mm to 50mm. So I figured, there is a way to get what I want...TORQUE, and use the stuff I have. Use an L24/L26 block instead of the L28/280Z block! Difference? L24/26 are 83 mm bore, L28 is 86mm bore. Since 260Z and 240Z use the same block, when given the oppurtunity to buy a long block L26 locally for CHEAP (REALLY CHEAP!) , I jumped! The stroker V07 crank is inbound, and Steve Bonk, well known in Z circles sold me a brand new set of forged H beam rods with ARP fasteners from K1 in the longer L24 rod size (L24 rod is logner than L28 by 3 mm! ). All that is left is pistons. They will be a custom made deal, as I want the bore to remain small, but still more than the stroke, so I maintain my bore/stroke ratio. 83 is the stock bore, and I am going to go 84mm which is barely larger than the 83mm stroke. Why not larger?? thicker walls mean more rigidity, more reliability and better seal, better everything! The pistons will work with the longer L24 spec rods and the V07 crank to get me right at 9.0 to 1 compression using the E88/260Z head with the Nissan head gasket. The E88 head I have, is .5 compression ratio lower, but has the 280Z exhaust valve already!I So I will use it. So, I got the long block today, and ran and got me a hoist and engine stand to do this. the bolts to hold the block in are NOT M10X1.5as everyone said ! I got those and they didn't work. I had to use SAE 3/8X16 bolts! That's right NOT metric but SAE! Were they tapped by a previous owner? Probably. I am OK with it. So, an additional run to the store got me some grade 8 botls, and I managed to get the engine off the ground and on to the stand! Then I commenced stripping it down. I think Nissan broke the Guiness book of world record for bolts for an oil pan....it seemed like there was 50 bolts holding it on! At any rate I got it down to a short block and rotating assembly. Next will be clearancing the bottom of the cylinders so the crank and rods will clear. A steady hand and my die griner and I hope to make the reliefs good enough that I don't have to do it again once the block is all clean and bored and ready to go. This will put me at 2750cc from 2393 cc ( gain of 350cc+). A L28/280Z engine is 2753....so Basically the same, yet, not. My engine more than likely will make more torque than horsepower, and that's fine. Why? Because I run an automatic transmission! Torque is king on the street, and especially with the auto trans. Keep in mind I still have a 510 torque converter for a higher stall and a Stage III shift kit I can add should I need to. With 3:54 open gears, it should really be great on the street! Cam selection is still up in the air....the C grind cam in the 260Z head is a great cam.....but I need to clean it up and see if she is good to go or not. Prior owner painted the block John Deere Green (why? ) Here are a few pics of my new headache. Edited October 13, 2022 by A to Z Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.