z shredder Posted October 30, 2020 Share #1 Posted October 30, 2020 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. Link to comment Share on other sites More sharing options...
Zed Head Posted October 31, 2020 Share #2 Posted October 31, 2020 Use "stroker" in your search terms and you'll find a bunch. This guy might actually be close to you. Link to comment Share on other sites More sharing options...
z shredder Posted October 31, 2020 Author Share #3 Posted October 31, 2020 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. Link to comment Share on other sites More sharing options...
munters Posted October 31, 2020 Share #4 Posted October 31, 2020 (edited) 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, 2020 by munters Added info 1 Link to comment Share on other sites More sharing options...
z shredder Posted October 31, 2020 Author Share #5 Posted October 31, 2020 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. Link to comment Share on other sites More sharing options...
munters Posted November 15, 2020 Share #6 Posted November 15, 2020 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. Link to comment Share on other sites More sharing options...
duffymahoney Posted November 15, 2020 Share #7 Posted November 15, 2020 Crazy Les is getting 3L out of a stock L24. Link to comment Share on other sites More sharing options...
munters Posted November 15, 2020 Share #8 Posted November 15, 2020 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/ Link to comment Share on other sites More sharing options...
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