To GTB or not to
AO Silver Member
Join Date: Nov 2007
It is a big turbo, but still it should be able to spool up around 2000rpm quite good.
Judging form the dyno printout it seems that your current ECU map, or some VNT settings are holding you back a lot.
It looks very laggy, you should be able to improve that a lot with proper settings.
I think the decision to remove MAF sensor is wrong. It is very hard to control turbo spool and injection in low revs without MAF.
So you either have very bad spool or a lot of smoke. Not ideal situation.
I would suggest you to install MAF sensor from 2.4 JTD 20V 175HP engine. And the fuel pump from this engine is also a good choice for your needs.
3.5bar or 4bar MAP sensor is definitely a must have upgrade in your case. How much boost are you running at the moment?
Water methanol injection is good choice, it will help you to achieve more top end power, when injectors are maxed out.