compression height 4G69 stock pistons?
Dec 3, 2013, 05:50 PM
#1
compression height 4G69 stock pistons?
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).
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).
Last edited by doncarbone; Dec 3, 2013 at 06:07 PM. Reason: clarity
Dec 4, 2013, 03:58 PM
#4
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...
Feb 21, 2014, 05:55 PM
#7
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