NISR, i'm not running water injection.My set up runs an R34 IC with water spray controlled by a pivot controller.All the pipe run is 60mm bore,I dont have headlamps/battery/fusebox etc.etc.,so the pipework is as simple & short as I can make it.Of course the NOS helps the inlet temps as well as reducing the lag.We run water/methanol on our demo Impreza,its a better choice for a road car IMHO.
To be honest, I never thought the standard internals would cope with the punishment.I litteraly chucked the engine together in time for Banzai @ Crail earlier in the year.I sold the engine I had in the car last year to buy my GT30, so had to use what I had lying about.It aint pretty, but its not dropped compression all year, and uses very little oil.Time spent upgrading the fuel system/injectors/flow meter & induction and set up on the SAFC means no det & good reliability.Having guages for 0il temp/pressure,AFR,coolant temp,fuel pressure helps keeping an eye on things.Fitting inlet & exhaust temps,knocklink for next year,upgrading to an Apexi ecu and progressive controller for the NOS.
I've spent less than 5K building this car to date,from a burnt out rusty shell, to the quickest pulsar down the Crail strip.Great wee cars
Dave