a31 rb20e -rb30e+T help needed

[Sn0ope]

> hi there i am after some advice and help on a conversion i have
> going,basically brought a half done a31 project that had had an r31 rb30
> added and injectors etc wired i am unsure what ecu the guy i bought it off
> has in. since i brought it i have replaced engine loom and got running
> using a rb20e intake to match the loom for knock sensors idle control
> valve etc, am running rb20de injectors(pink same as 30e) as they fit and
> plug directly in with the rb20e loom and intake manifold. the car starts
> and idles well but backfires and wont power through when it comes onto
> boost so my gut feeling is that it has the rb20e ecu still in place , i
> have put an ic socket in and have tuner pro and a eprom burner and plenty
> of chips and sockets to play with (have only played with r32 twincam
> models before (rb20det, rb20det-rb25det etc) i am pretty much stuck as to
> where to go from here as i cant find very much info on the single cams let
> alone in a31's.
> cheers

[bachig24u]

Have you ruled out the fuel supply, regulators, pumps etc?

does lowering boost reduce the backfiring?

checked based timing?

sounds more mechanical, can you post a data log to give some indication of what we are dealing...

[Matt]

This sounds like quite a mixture...

Part number on the ECU casing? This would be a good start

What ROMs are you running in the ECU?

You should really use the original RB30 loom so it matches the engine (they are cheap here in Australia) but if you can get the other loom working then I guess that is okay

You will need to upgrade the injectors to something decent (200CC is not enough on an RB30) at least 269CC (VLT brown) or 444CC (GTR yellow) on the current fuel rail

Are you running Nistune at all? You talk about tunerpro which is not supported on these forums