I looked at a 240z today, and the guy said the L24 had been bored out to three litres. Correct me if i'm wrong, but I wouldn't think that the block could have that much taken out form it, and if it could wouldn't the block be really weak?

 

do Americans use litres when talking about car engines? or just when japanese cars? Do you still use Cubic Inches, or just when talking about a type of engine?

 

Well if it is an L28 and not a 2.4, then yes there is a conversion for a 3 litre engine... with a few little trinkets and so forth, so yes, if it's an L28 block, it could very well be

"What do you mean I need to hang on to the wheel at 100 mph?"

 

Its fairly common to overbore and stroke (using a LD28 diesel crankshaft) one of the L28 blocks to get a 3.0 to 3.2L engine.


John Coffey
johnc@betamotorsports.com

 

I know that the F54 block is thicker and usually the choice for most people, but I'm not the most knowledgeable person on the subject...

"What do you mean I need to hang on to the wheel at 100 mph?"

 

No, if your bore it out +.120, you will not have a lot of metal left. A 2.8 over .120 takes it to 3 liters. By this time, the block is sonic testic, magnafluxed, etc. to make sure the thin cylinder walls will be able to handle the hp without flexing during operation which can be a engine destroying flaw.