Piston size

[conorIRLgt]

Well lads just wodering has manypeople used 75mm pistons in a 4e , is there enough meat in the cylinder wall to do it ?will be using ross pistons if its any help..

[yaristurbo]

I'm boring to 75mm on 5e, been looking around for blocks cracking and found nothing so far, heard a lot of people using 75mm vitara pistons so should be ok

Best this is to get the block ultrasounded there a tool that measures the block walls properly

Other thing is most places stock 75mm pistons too so can't be prone

There is not much cc gain tho, mainly done if a 74.5 has scored the bore

Is there a reason for the rebore?

Edited January 12, 2014 by yaristurbo

[conorIRLgt]

mainly going for the few extra cc's every little will help with the 4e hopefully

[yaristurbo]

Think it was something like 1497cc to 1530cc can't remember now

[conorIRLgt]

ah well every little helps

[aidanep71]

That's a nice gain from the 1330 or whatever they are from std

[yaristurbo]

Yeh man shorty went to 75.5mm

[conorIRLgt]

Yeh man shorty went to 75.5 mm

on a 4e ? if so i might look into that

[yaristurbo]

Not sure buddy

[AdamB]

Yeah shorty was on a 4E.

I don't see the need to go 75mm personally, the slightly increased engine capacity and compression ratio isn't worth it. You have to factor in that if anything goes wrong your screwed as you can't buy next size up off the shelf. Exactly the reason why YT is having to go upto 75mm because the bore was ruined.