coupe turbo
15-06-2007, 20:56
hı guys, What is thecdifferences between k04race turbo and vxr turbo. If ı have k04race turbo in my z20let do I need to change my pistons or not. And what ll the boost grade with ko4 race model and at high revs...:)
aberdeenGSI
15-06-2007, 20:59
You will need to uprate ur pistons and rods mate :cheesy:.The boost will range from 25 to 27 psi over boost and hold around 19.5 at top end
coupe turbo
15-06-2007, 21:06
DO U have any idea about pistons' and rods's price. And 19.5 psi in which rpm?
aberdeenGSI
15-06-2007, 21:26
Price of rods and pistons is £1000 mate.the boost peaks at 19.5 psi at 5500rpm
wouldnt you need oil spray bars fitting too? or anything else, or simply the rods and pistons?
The turbo can only give what the mapping allows it to, plenty of people have run the stage 4 "race" turbo on stage 3 mapping, with cam work. It gives more headroom at higher revs to maintain the boost and stock pistons will cope. For a stage 4 map or beyond, then the heat can cause problems in the combustion chamber. Low compression pistons stop this, this is all I have done to my car, along with ARP bolts to keep the bottom end together. Billet rods aren't strictly necessary, depends on if you want the ultimate sort of power or not, if you plan to run a Garett turbo or IHI turbo then they might find the limit of the stock forged ones.