m20b23 tuning potential

[Bazyl]

M20B23 (LE-Jetronic) has 150HP stock at crank. I would like to make it 170-180HP. Is it possible with hotter cams, headers, Mahle Pistons, Maybe conversion to Motronic?

Thanks!

[Kershaw]

If you change the cams, headers, and pistons, you probably want a tunable engine management, like VEMS or Megasquirt.

And, of course, anything is possible with enough money. You can get 300whp out of an m20 if you want to. It just requires enough money. It definitely won't be a 2.3 liter anymore, maybe 2.9 or 3.1 liters.

[Bazyl]

Good point Kershaw. My question wasn't specific enough, let me modify it:

I would like to get around 180-190HP from M20B23. What modifications should I do? (Now, knowing mods' list I will be able to calculate the cost).

One note: I don't want to bore that engine.

[Jeffnhiscars]

Dual valve springs, cam, +2 (885) valves, a mild port job, 19lb injectors and a motronic/chip upgrade.

[hotdish]

you could swap to a 2.7 eta block to effectively bore/stroke it too.

[Tom D]

....One note: I don't want to bore that engine.

why not? the Ljet M20B23 with 150hp had 9.8:1 compression. since the bores are probably tired and you're swapping pistons then it's only logical to bore it and bump the comp ratio to 10.5:1, displacement is one of the quickest way to gain torque.

[Bazyl]

I would rather swap bottom end with ETA's bottom end.
So, the setup would be:
-ETA bottom
-731 Head
-Mahle pistons
-Schrick cam
-Headers
-Some porting
-m20b25 Intake manifold


What could be expected power range?

[Jeffnhiscars]

This might help

http://racehead.com.au/m20-low-compr...troker-engine/

[Ceaston85]

I would rather swap bottom end with ETA's bottom end.
So, the setup would be:
-ETA bottom
-731 Head
-Mahle pistons
-Schrick cam
-Headers
-Some porting
-m20b25 Intake manifold


What could be expected power range?

Hey @bazyl did you ever get this done?