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

[cgnj]

Actually, What started me on this was many years ago I read this threadStock 2.0l plenum and runners on 2270, It will flow enough air I just opened the box with all the parts I collected for this. It also has a 2.1 water boxer plenum (reworked to accept 914 throttle cable) and the TB. Then I started working on my other project cars. They are all finished now so I'm back to disabling a good running 2270 motor.

Availability of reasonably priced ITBs is the problem. CB appears to be the only company with them. Can't be ordered from Mario atm.

If @GregAmy decides to sell his stash, I would be in the market. Good article regarding your microsquirt conversion. You should post it here so it can go into the Lapuwali Classic Thread Forum.

[GregAmy]

If GregAmydecides to sell his stash, I would be in the market. Good article regarding your microsquirt conversion. You should post it here so it can go into the Lapuwali Classic Thread Forum.

There's a thread about when I was going through it. The blog is there and it's free to use for anyone that wants the info.

After posting that later tonight I've gone back and forth. But at the right recovery-of-costs price I'd let it go because I kinda don't think I'm that motivated. But it's winter so who knows.

As for the D-Jet induction...I've got a 2056cc with a FAT Performance EFI cam (less lift and duration than a Web Cam 86 null) and around 9.5 compression. I'm tuned pretty good with the Microsquirt. As I review the latest logs I did notice that my MAPs at full-throttle runs (per TPS) were all around 98kPa...even to the 6000 redline. And that's with the stock D-Jet throttle body.

Does that not imply a damned-near no restriction? Would a bigger throttle body even give me much more power?

That's exactly why I wanted to do this ITB experiment. Dyno the car as it is now (I still have not done that since the engine rebuild) and then swap it to these ITBs, and then see if there's really any difference. If I were a betting man...I'd suggest that the ITBs on this engine would not offer a significant increase in performance.

On a big-cam 2.4? Yeah, probably. But on this one? Eh...

Which is pretty much why this experiment has stagnated. Seems a lot of work to prove something that I think I already know...and am not likely going to bother to build a bigger engine to find out.

I'll gather up all the parts to see what I actually still have.

[JamesM]

On a big-cam 2.4? Yeah, probably. But on this one? Eh...

Doesn't even need big displacement to be a restriction, just a motor that wants more air. on my 2056 even with a 52mm throttle body my manifold pressure increasingly drops to about ~8% on WOT runs above about 4k RPM.

You can calculate roughly the power level where a certain size TB becomes a limiting factor. Im going to guess your 2056 is built to somewhere in the 120-130hp range?