Why do 240Z Owners So Often Put L28s in their cars?

[Jennys280Z]

Is there something intrinsically inferior about the L24 block? I've heard about the siamesed cylinder bores of the F54 block but does that really make that much of a difference?

An L26 is a stroked L24. An L28 is a bored-out L26. So why not just keep your original engines and just rebuild your original engines already in your cars? It follows that this would be a good idea for the car's resale value as well.

[IdahoKidd]

More power! I've got to have more power!

[Jennys280Z]

[Zforce]

In a word POWER. In two words POWER and TORQUE.

[240ZGL]

Bored and stroked, you can get about 2.7 out of your 2.4.

[Jennys280Z]

Okay I can understand using a 280Z or 280Z-ish head on a rebuilt/modified L24 for power and torque. But I don't understand why so many people get rid of their original blocks. Other than, I guess it's cheaper to just slap in an L28 from a 280Z or ZX...it's kinda sad to me though.

It would seem to me that a 240Z with its original but well-rebuilt L24 would be a very desirable car to have in this market.

[Jennys280Z]

Bored and stroked, you can get about 2.7 out of your 2.4.

Turbocharge that 2.7L then. Maybe there's a niche in the market out there that does this but I've never heard of it before.

[cygnusx1]

Because my 240Z came as a roller and the original motor from my 280Z was full of cobwebs on the garage floor. Put two and two together and I have an L28 240Z.

I wish I did have the original block to match the engine plate in the bay. It's somewhere in GA, North of Atlanta.

[Jennys280Z]

Because my 240Z came as a roller and the original motor from my 280Z was full of cobwebs on the garage floor. Put two and two together and I have an L28 240Z.

I wish I did have the original block to match the engine plate in the bay. It's somewhere in GA, North of Atlanta.

well you are very certainly excused, based on your story!

[240ZGL]

It's the other way around. Use a 240 or big valve 260 on a 280 block. It's the block that gives you the inches and inches = power

[IdahoKidd]

the only substitute for cubic inches is cubic dollars.

"Speed costs money. How fast can you afford to go"

[Arne]

It would seem to me that a 240Z with its original but well-rebuilt L24 would be a very desirable car to have in this market.

This is true - IF the rest of the car is essentially stock, or can easily be made so. There is added value to a stock 240Z for having the numbers matching motor. But if the rest of the car is modified, that extra value is small. For a modified car, the perceived value of a fresher, and more powerful motor may out-weigh - or at least cancel out - the lack of numbers-matching.

There is also a special case. For the very early cars (first 3 months or so production, aka "low VIN"), the original motor is a big part of the draw, along with general originality.

Edited February 1, 2011 by Arne