I am in the early stages of planning my RB30/25 Neo build - still trying to find a good RB30 block, they seem to be getting a little harder to get these days.
This will go into a ER34 which currently has a (tired) RB25DET NEO; but I won't be touching the engine that is in it until I have completed the new engine.
This will very much be a daily driver/gokart and would be quite happy making 350-400rwkw (even that's overkill), full boost at or around 3500rpm (max) would be my preference - I'm considering something like the EFR 8374 or perhaps the next step down.
I've read many of the threads and while there is some talk about these pistons I still have not managed to find a definitive answer for my preferred choice of piston material, 4032 pistons - smaller tolerances - ideally for the longevity, (slightly) improved detonation tolerance (over raw cast) and the fact that I would rather bore out that 25+ year old bore and replace the 25+ year old pistons, it seems logical to go with brand new pistons/rods... well aware of the general consensus that that the stock pistons and rods are good for 300rwkw.
For rods I will probably go with spool import conrods, for pistons it appears only Wossner and Mahle do a piston in 4032.
So my question being, using the RB25DET Neo head (we'll have to assume the head cc at this stage) and having a preference for around 8.75 - 9.0:1 compression ratio - does anyone have any recommendations on exactly which pistons would be required and exactly what work would need to be performed to the block - ie deck height (more so I know what I'm in for, ideally I would like to not have to mess with the deck height significantly more than a skim if avoidable)
Looking at the various catalogs it's very confusing in so much as I often cannot even find the pistons being listed on various retailers sites in the manufacturers catalogs.