Hello,

since I am currently restoring my 1973 240z and the l24 engine will get pulled out I am considering doing some performance mods. I have found that installing a crank with a higher stroke is a common way to get some extra power but i am not sure if it would be smarter to use a regular l28 crank (like the l26 did i believe) or the diesel ld28 crank and if this would even fit/work? Thanks for the help in advance.

Greetings from Germany.

Use "stroker" in your search terms and you'll find a bunch.

This guy might actually be close to you.

 

Thanks but I still don't know if this would work with my l24 block and cylinder head because everyone else is using the l28 block and I think that clearance might be an issue on my l24 block in terms of fitting the l28 or ld28 cranks. 

Both work. You can use a l28 crank and stroke it further by asynchrone cutting the main bearing eyes(sorry about the English description) I hope you understand what I mean. (This is what I did.)

Or you can use an ld28 crank in australia Les Collins is doing that. He gets above 3 liters aut of a l24 with it.

Edited October 31, 20204 yr by munters
Added info

6 hours ago, munters said:

Both work. You can use a l28 crank and stroke it further by asynchrone cutting the main bearing eyes(sorry about the English description) I hope you understand what I mean. (This is what I did.)

Or you can use an ld28 crank in australia Les Collins is doing that. He gets above 3 liters aut of a l24 with it.

Thanks for the help!

That sounds just wonderful but do you also know if I would need different pistons because the compression gain with the ld28 crank might be to high?

I am also concerned that the pistons might hit the cylinder head at top dead center.

If you go to stroke your engine, you have to calculate everything. If you just putt an ld28 crank I guess so.

Use a engine calculator to see the deck hight. There are several.

http://www.ozdat.com.au/ozdatonline/enginedesign/

For example.

I did stroke a l28 with longer pushrods and shorter and +1mm pistons to have a good geometrie.

Crazy Les is getting 3L out of a stock L24.  

Yes it is a peace of art over 300 HP. Below the build

And sorry its an RB Crank not LB.

https://www.viczcar.com/forums/topic/15125-l24-stroker-build/