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Possible 240z engines?


prycey

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hmm. Well from what I've read on the 81-83 F54 is that it does have a little more torque and horsepower compared to earlier ones. It needed the extra torque and horsepower to haul the extra weight of the 280ZX. So putting an 81-83 L28 motor in an early Z that doesn't have the extra Luxurious heavy equipment can be considered a good performance upgrade for an earlier Z.

Point is you can't go wrong with ANY L series motor. L24, L26, and L28 are all Awesome motors. Yes, you can do some research and swap parts from different yrs. like engines, heads, transmissions, rear ends ect. to help create some extra horsepower and torque but like I said before, the thing "prycey" should be the most concearned about is just taking his time finding a good Z with as little rust as possible (Very Important) and getting that well tuned and running good. Then he will have a strong, powerful running Z. Thats all that matters :) Even a stock Z is not in my opinion SLOW. I never have seen a Z that is SLOW unless they are not properly maintained. :)

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It was my understanding that the very last of the F54 blocks actually altered the siamesed cylinder walls due to the earlier ones having a negative affect on cooling. As I understand it siamesed cylinder walls increased block rigidity and provide more effective load distribution.

``The first L28 turbo blocks have the front three and rear three cylinders siamesed... Although this improved block rigidity, it was thought that the webs inhibited coolant flow around the siamesed cylinders.

To improve cooland circulation, a casting change was made. On the block 11010-P9080 introduced in the 280zx turbo in december 1980, slots were put in the siamesed cores to provide coolant passages between the cylinders.'' - Frank Honsowetz (How to modify your nissan datsun OHC engine)

Anyone know how to determine which year block I've got from the number?

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the reason that the f54 blocks have more power is because of the flattop pistons. some DID have dished b/c of the turbo, but that's the big issue..

dave: what is the engine casting number? the majority of the F54s had the slots if honsowetz is correct (which he probably is), since the f54 block was made from '80 to 83 (correct me if i'm wrong)

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Jason,

The car lives at my parents place so I'll have a squiz when I'm up there on Friday. Sounds reasonable that the majority have the coolant slots.

Back onto the topic somewhat, bang-for-your-buck you can hardly go past an L28 with some decent induction (efi/carbies whatever tickles your fancy) and some basic N/A mods: cam, exhaust, porting etc.

The only engine I would consider replacing my L28 with is an RB26, and I can't afford one. :(

Dave

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Hey dude,

I also need to join the Z club, but the first thing you need to do is email me on scheuber @ tpg.com.au and come check my car out, i'll take you for a spin, and show you what you get, and the receipts that show you what it cost me:)

You are where i was when i was 18, and i'm now 21, and wish i'd listened to the me that is where i am now :) if you follow. So anyway, email me and sort out a time to drop in and chat about Z's, i'm out east brisbane in the bayside.

Charles

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