L24 Stroker Conversion

[ainokoz]

I'm looking for some info that I've heard about but can't confirm concerning creating a stroker engine for the L24 by putting in an L20 (from Japan) crank. I've heard about this from a couple of people but couldn't determine all that went into creating one. I'm very interested if anyone can give me the recipe for this. Thankz

[HS30-H]

L20A / L20E crank stroke = 69.7mm

L24 crank stroke = 73.7mm

So putting an L20A or E crank into an L24 block effectively de-strokes it.

You'll need longer con rods, and/or custom pistons ( with a different pin height to stock ).

This conversion can create a nice revvy and responsive engine when all other factors are maximised, but it might not actually be what you are looking for?

[Mr Camouflage]

Maybe you mean the L20A crank in the L28 block? That also de-strokes it to just under 2.5 liters, and aparently was what Bob Sharp's 240 used to run in the GTU (Grand Touring Under 2.5 Litres), well thats what I read on Hybrid Z.

[beandip]

L20A / L20E crank stroke = 69.7mm

L24 crank stroke = 73.7mm

So putting an L20A or E crank into an L24 block effectively de-strokes it.

You'll need longer con rods, and/or custom pistons ( with a different pin height to stock ).

This conversion can create a nice revvy and responsive engine when all other factors are maximised, but it might not actually be what you are looking for?

Alan ,a few years ago , a friend of mine bought a 240 Z that had a L-20 block and a head with a number I had never read before . I don't remember the number now . After asking about this engine , on this site and Zcar , some one from Au told me that they had those engines there, is some of there cars. That it was a higher reving engine but didn't seem to hold up . Does this sound right to you ? My friend has since crashed the car and it is no more. But it was a good running car as long as he was able to drive it. Gary

[HS30-H]

...a friend of mine bought a 240 Z that had a L-20 block and a head with a number I had never read before.

Hi Gary ( how are you?),

Could have been an 'E30' head if it was an early L20A engine. Later L20 engines had several different heads, and 'Y70' castings were common - sometimes seen in Australia I hear. Occasionally these crop up around the world, and cause a little headscratching amongst those not so familiar with the smaller capacity Nissan L6 engines.

Cheers,

Alan T.

[red_dog007]

There is an LD28 Diesel Crank that ups the literage from 2.4L to 2.7L. Supposed to increase torque quiet a bit.

This is what I am currently looking into for my 240z car.

Putting in a L20 crank I could see give it much higher revving capabilities, maybe a little more horsepower but not near as much torque. I dont know why, but I can also see the power dropping off very fast once you hit peak horsepower.

[Mr Camouflage]

Hi Gary ( how are you?),

Could have been an 'E30' head if it was an early L20A engine. Later L20 engines had several different heads, and 'Y70' castings were common - sometimes seen in Australia I hear. Occasionally these crop up around the world, and cause a little headscratching amongst those not so familiar with the smaller capacity Nissan L6 engines.

Cheers,

Alan T.

Then theres the 05L head that really confuses people!