Injectors to match TB on bigger engines Options

[Literati914]

I know a 2.1 throttle body from a vanagon is a popular option for say a 2270 build or better... and there does not seem to be a need for upgrading the stock 2.0L fuel injectors when using it BUT, since I need a set of injectors anyway, would the following be a good option? What would be the pro's/cons? :

https://www.gowesty.com/product/made-in-usa...ctor-bundle-?v=






.

[GregAmy]

I'm not entirely convinced that the stock plenum is a big restriction for a low- to mid-range street engine. After all, the four cylinders are pulling vacuum individually, not at the same time, and the hole they're breathing through is 44mm, where the dual Webers are typically 38mm.

Sure, there's going to be a difference, especially since the plenums will be longer and less efficient than a short plenum dumping directly into the intake port. But is that a significant enough difference to mean anything for a street car?

I encourage you to review EricP's Microsquirt thread.

[JamesM]

I'm not entirely convinced that the stock plenum is a big restriction for a low- to mid-range street engine. After all, the four cylinders are pulling vacuum individually, not at the same time, and the hole they're breathing through is 44mm, where the dual Webers are typically 38mm.

Sure, there's going to be a difference, especially since the plenums will be longer and less efficient than a short plenum dumping directly into the intake port. But is that a significant enough difference to mean anything for a street car?

I encourage you to review EricP's Microsquirt thread.

It would probably depend on the motor. For sure there would be less of a chance of it being a noticeable issue on a more mild build. Cant say for sure until you try it, but I can speak to the data that I have...

My current test bed is a fairly aggressive 2056 running a modified 1.8 plenum and runners, a 50mm throttle body, full open 3" cone air filter and headers. 2 things are noticeable 1. Throttle response has some lag to it. 2. Datalogs of WOT runs show an intake restriction noticeable in the upper RPM range of the motor, so its not just a guess, its hard data.

So, no denying it is a limiting factor, at least on my 2056, but then that is only at the top end of a motor that happily spins to 7k rpm. Would it be a problem on an even larger motor that lives at lower revs? The restriction would for sure still exist, but would it be enough to care about? IDK depends on the motor and the driver I guess.

Throttle response quality aside, My best guess butt dyno (and calculations on the intake dimensions) estimates the setup to start being an issue power wise around the 140hp range