ok so i have a 96 turbo 2000 and since having a 2.5 conversion have had big problems with it cold starting but always put it down to it needing to be remapped so had it done with apexi fc but still no joy if any thing its got worse and on top of this now it wont rev past 5500 rpm it just gives up any one with any suggestions would be great

 

speak to the guys who fitted the engine as they should know what wrong with it

 

what pistons are you running?
also what injectors are fitted?

 

it has got the sti v 10 pistons and 550cc injectors

 

mine started up fine on the stock ecu FWIW

but if you have changed injectors and stuff, who remapped it?

 

zen performence

 

Did you take it over 5500rpm before getting it mapped? I've got the same problem with reving with mine . Been told my heads are no good as the cams are to mild for 2.5 mine's a 94wrx .Phase 1 heads seem to have this problem . Was advised to get a set of STi3 or 4 heads . What model is yours? 93-96 ? or 96 on?

 

93-96 but rev right up to the limter befor

 

What turbo are you on? 16g? That and ph1 heads is probably the reason you don't get much past 5500.

What have Zen said about it? Are they aware of your concerns?

 

it should still rev past 5500rpm!

is it not revving past at all, or is it down on power and feels flat over 5500 ?

two totally different things!


fwiw mine is running v3 heads and a 16g turbo

 

Mine was mapped on a 18g flat line 1.5 bar which would start to give up bout 5k but by 5500rpm it really started to struggle. If i set the boost controller to 1.1 bar from 5k it's fine. Try that and if so i think the head's could be your problem. At 1 bar my car drive's very well right up to 7k limit