Bigger throttle body swap

[engnr.mubashir]

If someone manage to do approximately 30% bigger throttle body swap than stock in his car for better response and no rough idling issue, check light or anything.
The question is will ECU adjust the fuel values according to air flow or it will make it run lean due to stock fuel inputs and timing ? I want to know any tweak we can do other than piggyback ecu to make ecu fool to get more fuel, what are the option. adding FPR or anything else going to make any difference.

[kameetaha]

So the question is, how to get more powah without turbo and supercharger.

I don't think stock ECU would like to be out of its parameters. When it runs lean, ECU does indeed adjust its fuel inputs accordingly; it can only do so in range, when it goes beyond its capacity, there you get CEL.

Having upgraded intake with performance filter and straight piping will get you some minor differences.

[engnr.mubashir]

BTW I said better response not power gain like turbo or supercharger placing.

Already told there is no CEL on wide open throttles.

Performance filters are not cheap nor they cat back exhaust, straight pipe is not a wise decision to go with. so throttle swap is what most affordable costed 6k.

[pwuser153796752163]

Yes, in theory, your ecu should dump in more fuel to compensate for more air. Your MAF would trigger more air entering, the ecu would add more fuel to compensate, keeping your AFRs stable. But everything else after the bigger throttle body (intake mani, cams, valves) will chanel the same amount of air as before, as these parts have not changed.

Your car would either run rich (based on your intake mani's design) or would just stay the same, but with a slightly better throttle response (placebo effect because of the bigger throttle plate).

Ideally, you would need a better flowing intake mani, better cams, better valves and springs, a better exhaust extractor and a reflash to make the bigger TB work.

[dani_kk]

The car will run slightly lean, but no damage to engine due to trims calculation by ecu. Have tried this in many engines. In map system and aswell as maf system.

So it's a good mod.
Bigger tb
Cais
Free flow exhaust and you are good to go

[engnr.mubashir]

Thanks for the vote of confidence.