Cams choice, Low CR vs VE%
I recently measured the 2.4liter in my 2014 Chevy Orlando. She's a DI-VVT and posted 220psi in every hole. I give her nothing but 87E10, and she never complains. But she has a 6 speed and a pretty low starter gear.
The VVT comes in at 4500, and then hang the heck on. Ok, that's a bit of an exaggeration ..... but she is rated at 174rwhp at 6700 .......... and I think she weighs about 3650.
She rarely gets into the VVT ; just when passing at hiway speeds. Otherwise that 6 speed is always in the right gear, it's simply amazing.
And on the hiway at 65mph, point to point, I have measured 32mpgUSg. At 3900lbs loaded, IMO, that's pretty darn good for a 2.4 humming along at just over 2000 rpm. Ima guessing the 220psi has something to do with that,lol.
Now remember; at one time, I got the same fuel economy in my 68 Barracuda (also 3650 unloaded) , with a 367 and geared 65=1600rpm, and my pressure was just over 180psi. IMO the aero on my Barracuda has got to be far far better than on the Orlando.
If/when this current 367 gets tired I will be upping the pressure and lowering the flow.
from WIKI:
The LAF is a direct injected 2.4 L. It uses technology based on GM's other four-cylinder direct injection applications, but with unique features designed for its specific application. This includes an 11.2:1 compression ratio that helps build power, slightly dished pistons that increase combustion efficiency and injectors with an application-specific flow rate.
I recently measured the 2.4liter in my 2014 Chevy Orlando. She's a DI-VVT and posted 220psi in every hole. I give her nothing but 87E10, and she never complains. But she has a 6 speed and a pretty low starter gear.
The VVT comes in at 4500, and then hang the heck on. Ok, that's a bit of an exaggeration ..... but she is rated at 174rwhp at 6700 .......... and I think she weighs about 3650.
She rarely gets into the VVT ; just when passing at hiway speeds. Otherwise that 6 speed is always in the right gear, it's simply amazing.
And on the hiway at 65mph, point to point, I have measured 32mpgUSg. At 3900lbs loaded, IMO, that's pretty darn good for a 2.4 humming along at just over 2000 rpm. Ima guessing the 220psi has something to do with that,lol.
Now remember; at one time, I got the same fuel economy in my 68 Barracuda (also 3650 unloaded) , with a 367 and geared 65=1600rpm, and my pressure was just over 180psi. IMO the aero on my Barracuda has got to be far far better than on the Orlando.
If/when this current 367 gets tired I will be upping the pressure and lowering the flow.
from WIKI:
The LAF is a direct injected 2.4 L. It uses technology based on GM's other four-cylinder direct injection applications, but with unique features designed for its specific application. This includes an 11.2:1 compression ratio that helps build power, slightly dished pistons that increase combustion efficiency and injectors with an application-specific flow rate.