Newb question on "how-to" guide for ITBs on JDM 4AG Bluetop w/ MAP

[Project D]

(02-07-2020 01:37 PM)The Doctor Wrote:  Do you really need all that?

I was under the impression that a MAP ECU could run ITB's without much hassle? Get a set of complete blacktop 20V itb's and an adaptor.

One of my friend tried that, almost blew his engine up...

(02-07-2020 01:37 PM)The Doctor Wrote:  At least, that was the plan i have for my MAP 4A-GE, as the stock engine runs on MAP and TPS and the 20V does the same.

The stock 16v run on MAP alone. TPS is used only for idle (switch) and transient (TPS %/time)
The blacktop use mostly the TPS to run. The MAP sensor act as a correction factor.

(02-07-2020 01:37 PM)The Doctor Wrote:  But maybe i'm wrong about this, don't know for sure. Most info out there is on MAF engines, and those are a different game i think?

No 4A-GE run on MAF (hot wire). Silvertop and some 16v run with an AFM (flap)
MAF and AFM are totally different on both behavior and output.
But they essentially do the same thing, mesure directly the amount of air ingested by the engine.
So they don't care about what's behind them (Single TB or ITB).
But even on AFM, the TPS is used for transient (when you smash the throttle), and a single TB with a plenum act wildly different than ITB in those conditions.