Hi all

Based on this chart:

http://www.zhome.com/ZCMnL/tech/128combo.html

I've decided on going the 2949cc route by way of L28 block + L24 rods + KA24 pistons in STD 89mm width

That chart lists part number 12010-40f10 for the std diameter 89mm unit and lists a zero cc dish volume. I assume that means these are flat top pistons.

However when I look up this p/n I invariably find images of the dished Ka24de turbo piston

And then when doing a similar p/n search on nismoparts.com I came across an advertised Ka24 flat top piston but with a slightly different part number: 12010-40f72

Can someone confirm which is the right p/n before I place a non-returnable special parts order at the dealership please?

Thx

-e

zero cc dish volume should be flat tops, can you do a cross reference part search and check the nissan truck that came with the ka24 flattops stock?

D21 Trucks and S13 240SX with Ka24 engines use the flat top piston with p/n 12010-40f72

Does that settle it then?

I dug this up from rockauto, these are the pistons you need.

BECK/ARNLEY Part # 0125195

SEALED POWER Part # H832CP

DNJ ENGINE COMPONENTS Part # P616

30$ each, beck arnley comes with rings.

BTW all I just heard back from Nissan

Both pistons 12010-40F72 and 12010-40F10 are now NLA from Nissan/Nismo...

F72 is the high perf flat top piston listed in the S13 section of the Nismo catalog

F10 is the piston listed for use in the 2949cc L24rod/L28crank combination here http://www.zhome.com/ZCMnL/tech/128combo.html

So aftermarket as listed above is the only way to go... bummer...

Does this help? http://www.geocities.com/inlinestroker/index.htm