· Premium Member
mark you need to be more specific. the cruze has a 2.0 turbo variable nozzle turbo and the 1.4 gas uses a different turbo if im remembering correctly
Boost is resistance, so you could have the same amount of airflow at two different boost levels depending on modifications. So that is the reason I look for airflow. And also just curious to compare what max airflow of the turbo is compared to what airflow I am running. To see how much boost is really left in the turbo. And just was wondering, if someone did the research to find out the technical data for the stock turbos. To know max boost pressure, max airflow, max power. Thank you.Typical spec for a turbo is horsepower, which I suppose could be back calculated for a rough airflow number.
I believe that max Horsepower of the 1.4L turbo is unknown to most of us, the computer will bleed off the charge air beyond 16 lb of boost.
I would be more interested to find out much boost the stock turbo would safely make across the RPM band without the ECU messing with airflow.
For example my ECO has a peak torque at 1850 RPM compared to other models of 2500 RPM, Horsepower is limited to 138 @ 4900 RPM for all models with the 1.4L.
Going beyond 138 HP which requires a tune and some modifications, however it seems that people tend to upgrade the turbo to get past the 180 HP wall. (might be lower)
I am honestly not if that is a question or just a statement. Honestly not understanding what your saying. But if you are looking to get as much boost as boost below 3800? Then you will need to do some cam tuning to reduce overlap as much as possible to spool the turbo as fast as you can in low end. You could also advance both cams in low rpm to gain more low end power.Any data on bottom end boost capacity, between 1200 and 3800, that is where my car spends 99 per cent of its time at? In particular if I can stay in 6th and just increase boost to overcome a few more hills. I have nearly 40000 km of stock data collected. The ECO is already as efficient as GM can tolerate, now my goal is to see how much farther I can take bottom end boost and my FE.