When i originally turbo'd my b16a2 i was going to use the Apexi Vafc 2 i already had installed to tune it. I brought it to hyper drive in perth and they tried to tune it and said "it will work but i wouldnt trust it" they also said that you couldnt push more than 6psi with the stock injectors on a piggy back ecu setup.
They can only go so far, Piggy back ecu's are great for mild NA setups as they are pretty much as far as they can tune but when you get boost or heavier applications the piggy back cant go any further. So your robbing yourself of some power going with the piggy back plus its extremely unsafe.
The harsh truth is allot of people still wont use the Piggy back setup even if you do get it working. Because people know what they are and arnt capable of and they defiantly arnt capable of holding a safe boosted tune.
And trust me on this, you really dont wanna be rebuilding your engine. Im on my third rebuild, so take my advise and play safe. Save some more money and get a ECU that will do the job and more.
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