Converting IDF/DRLA to throttle body Options

[cgnj]

I have always wanted to do ITB FI for my 2270. I found a box in my stash of parts with a DRLA 45 with one of the air bypass screws stripped. I found this thread on STFSTF IDF/DRLA to throttle body.. I guess I would have to block off everything above the throttle plate, and machine my manifolds to for injectors. Feedback on this idea is appreciated

[technicalninja]

Not necessarily. I use my triple Webers as TBs and don’t use a TPS

@mb911

My GOLDEN rule is "There are always exceptions to the rules"

Someone will ALWAYS prove your wrong...

Now, without a TPS (or something else) an electronic brain cannot ANTICIPATE increased load.

You effectively have no accelerator pump circuit.

A non-TPS system will ALWAYS be "catching up" and does not have the ability to add fuel BEFORE it sees a change in either RPM (ignition) or load (MAP/MAF/airflow meter)

Unless your guru has come up with another way to add fuel at throttle tip in, I'm positive that adding a TPS will improve throttle response.

Do you log?

I'd WANT to know what my AFRs did during hard acceleration.
With no acceleration additions I'd expect it to show lean.

Bosch's simplest electronic FI was the mono-jet (TBI for GM, CFI for Ford).
This system has four main inputs. TPS, O2, RPM, and engine temp.
It had NO "load sensing" at all.

One thing to remember, a TPS shows throttle position AND rate of change.
You hammer the throttle; the FI will provide more fuel than if you opened it slowly.

The TPS is a requirement in my book...

[mb911]

Not necessarily. I use my triple Webers as TBs and don’t use a TPS

@mb911

My GOLDEN rule is "There are always exceptions to the rules"

Someone will ALWAYS prove your wrong...

Now, without a TPS (or something else) an electronic brain cannot ANTICIPATE increased load.

You effectively have no accelerator pump circuit.

A non-TPS system will ALWAYS be "catching up" and does not have the ability to add fuel BEFORE it sees a change in either RPM (ignition) or load (MAP/MAF/airflow meter)

Unless your guru has come up with another way to add fuel at throttle tip in, I'm positive that adding a TPS will improve throttle response.

Do you log?

I'd WANT to know what my AFRs did during hard acceleration.
With no acceleration additions I'd expect it to show lean.

Bosch's simplest electronic FI was the mono-jet (TBI for GM, CFI for Ford).
This system has four main inputs. TPS, O2, RPM, and engine temp.
It had NO "load sensing" at all.

One thing to remember, a TPS shows throttle position AND rate of change.
You hammer the throttle; the FI will provide more fuel than if you opened it slowly.

The TPS is a requirement in my book...

Correct it uses rpm and map off my 6 restricted vacuum ports to single manifold which leads to the map vacuum port on the ECU. I will have to grab a screen shot next time I log which will be 5 month or so from now(snow) from a driving experience it has identical throttle response to what it had when running carbs. Also a broader power band but that is also because the wideband is making adjustments. Very happy with my simple system. My biggest complaint is how loud the fuel pump is and that’s all