buzz944

Can I run used F20C OEM pistons with cast iron sleeves?
or cast iron only works with aftermakret pistons?

I want to go back to stock and my IP HG blew and water ate through my cylinder walls

Another option might be cast iron sleeves with OEM compression aftermarket pistons + rods in order to use OEM ECU. so the car is freshly stock but with aftermarket parts? will this work with OEM ECU??

ofcourse i prefere to run my used OEM pistons + new piston rings and ACL bearings as it'll cost less

honing is not an option as no one in my country can do it

i really appreciate the help

wadzii

you should be able to get any machine shop to hone your block, they just need to contact the manufacturer of their honing machine to obtain the proper stones. The process is the same as any other block, only the stones need to be changed.

As far as oe pistons in iron sleeves.. I have no idea, never known anyone to try it. I know they have an iron phosphate coating, so probably not.

buzz944

yeah I know its only a stock, but i know for a fact that machine shops here don't the headache a risk of dealing with unfamiliar block

so i guess cast iron sleeves with aftermarket internals with 11.0 compression is the way to go

it will work with OEM ECU right?

chris_barry

I've had a few customer run aftermarket 11.0 pistons on a thin walled liner. Keep in mind the factory pistons have an approx 22.99mm pin, whereas the aftermarket pistons use 23.00mm. This means you need to have your rods honed to suit the 23.00mm pin. Its not ideal running steel to steel but engines that have run the configuration have not had any problems. ( inspected after a seasons racing).

Aftermarket pistons have bronze bushes in this area. Look at some of the rod/piston combo packs as the rods do not add a lot to the price.

OEM ECU will be fine provided the fuel octane is high enough.

buzz944

yeah i'll get the CP 11.0 comp + BC H beam rods & ACL rece bearings

buzz944

is it a good idea to bump the compression a little bit on the OEM ECU? or it'll lower timing and won't gain from the higher comp?

chris_barry

You could up the compression to 11.5. Make sure any sharp edges on the piston crown are smoothed off.

Be careful about milling the head back to increase compression as you can go too far and have piston/head clearance problems. Start with a higher compression piston and machine the dome back to your intended compression ratio.