Re: BMC Carbon Dynamic Airbox install in Maruti AStar! After a back to back comparison with a modified stock airbox and the BMC CDA. I'm back on CDA now.
Modified stock and CDA:
A simple human-tech flow test:
In order to test the basic flow efficiency i blowed into the air intake mouth of these two setups to see how much air is falling on to my hand placed at the airbox exit on the engine side. With the CDA airbox the air falling onto my hand was more or less at the same speed as i was blowing into the CDA and the draft was healthy. With the modified stock airbox, the air falling onto my hand was very feeble in its velocity and i couldn't feel much of any draft. With the stock box i repeated this experiment with the air filter panel removed to see how much of a difference it would make, but unfortunately the effect was more or less the same so i doubt if a freer flowing panel filter would make much of a difference.
Back to back testing (two weeks total, one week with each setup) impressions:
For an onroad experience i removed the CDA and installed the above mentioned stock box (with the filter of course) and went for a drive. Most noticeable was the increase in low rpm throttle response and better low rpm pulling power. But quick revs to high rpm suffered, and the engine doesn't pick speed as well as with CDA. But the car felt lot more smoother. This was better than a bone stock airbox. Engine braking while letting off the throttle was more pronounced, car lost speed quickly than with CDA. This is due to a restricitve intake.
With the CDA, the low rpm response was slightly hampered, and the low rpm lugging power was not as good as with stock box. But car gained higher revs quickly and it felt a lot faster. Engine braking was milder and car can coast effortlessly for a while before slowing down.
PS: The filtration of the CDA is decent, on the air intake side it was dusty but on the engine side it was clean. |