thanx bro...right now im just a 1.5 BOT bro so means 390cc is good enough right?
coz there is few foremen told me is enough already just that if upgrade to 510cc is for future needed only LOL.
If get evo ECU is it plug and play? to 4G91?
Ok.. first of all, U must kno about A/F aka AFR aka Air Fuel Ratio in order to answer the question. When u decide an upgrade, First u must have to decide a targetted hp. Study and learn. Most importantly, know and understand the item. Best way is ASK/READ.
Ok, now back to your question. Assuming u've upgraded/change to TOYOTA 81mm SUPERCHARGER pistons, U should now be achieving 1597cc. Which is equivalent to 4G92. In terms on engine number, U're on 4G91. But in actual calculation, engine is similar to a 4G92.
Personal experience, 4G92 with TD04L boosting 1 bar. There are still much allowance to go more... But when U change turbo to a bigger CFM. Simply means, boosting at same 1 bar, U are driving more air into your manifold. In that case, fuel requirement for the same egine on TD04L and TD05 is very much different.
However, I'd expect the injectors will serve u well. However, if you are planning to futher up boost in future, It's always wiser to oversize a little. But 510cc for an NA ECU with emanage piggy will expect to be suffering of over rich at the low rpm. because 10% duty cycle for 510cc and a 390cc injectors are also very different, for example, just an example. 1V makes the injector open 10% of the duty cycle in 390cc. It'll still be opening 10% for 510cc. But 10% for 510cc is much higher than a 390cc.
Due to the ability of emanage to up/down 20% of a of the stock A/F mapping, the 20% of the 510cc could be out of range. And normally at low end, the pistons might achieve ultra rich cndition. And the idle could be a problem.
So, I think 450cc is more than enoughh. And nothing beats a standalone in controlling the injectors with full range.Then 510cc or even 700cc, a stanadalones have fully access to the injectors and remap it yourself. then it's not bounded by the 20% up and down. U write everything ursekf.