Hi Guys

I own a EVO 6 GSR and recently built my engine with Stroker comp pistons, rods and a stroker crank bringing the CC to 2.4Lt.The cams are Blitz light weight with a little delayed lift.The ECU is a Reflashed evo 8 ecu with a carbon copy Ralliart program.The turbo is standard evo 6 with standard wastegate.

The problem is with the Apexi AVCR i am only getting 1.2 bar boost on 1st and 2nd gear and 1.5 bar boost on the rest of the gears.Can somebody help and tell me how i can increase the boost to spike to max boost and then taper it down.When the vaccum hose is removed and we do a run max boost is 1.7 bar

Also the AVCR is showing a negative boost when the engine is switched off and on ACC mode.

Can somebody advise pls

Thanks

Chris

 

maybe a wastegate leak? what are your AVCR settings? honestly thats a serious build for the stock snail... thats what i would say, you are prolly over taxing your turbo. with that stroker u might want to consider something bigger, like a Red or HTA 30r/35r... but i dunno thats just my $0.02

and negative boost would be vacuum, which occurs if you are not building boost

 

for the stock turbo, are the values chris mentioned correct.

the other point to note is that if the gas is let off and then floored again on 1st or 2nd gear, the boost increases significantly.

question is what is the max boost the stock tdo5 can take and are the boost points chris is seeing correct on his gearing.

thanks in advance