I'm having Wiseco make me custom pistons for my boost project.

I'm going to be using Manley's Turbo Tuff I-beam rods which for the uninformed, are 1.27mm shorter in length (as are all standard 4G63 rods) than the stock conrods in our 4G69s. They are calculating, based on my 4G63 rods, the gasket I will be using and my desired compression ratio (8.8:1), the exact height these pistons should be.

It seems the rep I'm speaking to at Wiseco doesn't have the factory compression height for the 4G69 which he needs to accurately calculate the new piston height for my build.

Does anyone happen to have the OE factory pistons' compression height from the 4G69? I haven't been able to find this anywhere and I can't disassemble my motor to find out for another few weeks (to measure this myself), at which point I'd ideally like to have the pistons ordered in preparation for the cylinder head rebuild (we want the new pistons before we do that).

 

bump

 

a few guys here in the past have had the stock pistons out...don't remember who...


a few guys have spare motors too...I would also like to know.

 

i'm basically holding off on ordering my pistons until i am absolutely sure.

i've identified that the performance gasket i will be using is of identical spec to the OE one, and i'd imagine my cylinder head will be decked very minimally, if at all, given the motor only has about 70,000km and has never been abused (sound like a reasonable assumption?). the only variable here are the rods which are 1.27mm shorter in length than the 4G69 stock rods...

 

im still looking for this information - does anybody have the cylinder head/pistons of the 4G69 handy?

 

anybody with a spare 4G69 laying around?

 

I have one currently disassembled in my basement i'm rebuilding I can take a picture and post it up if you like

 

awesome sure man that'd be great

 

Forgot my cailper gauge at work today . I will have a picture for you on monday

 

great thanks man