Direct Injection and the next gen Z

cheshirecat · 06-04-2014, 10:19 AM

Unfortunately, DI carbon buildup spans many different engines and manufacturers. Some are better than others, but many DI engines from Audi, Mazda, BMW, and others still require carbon cleaning due to the nature of DI setups.

In the video below, it shows how gas flows over the intake valve into the cylinder before firing. With direct injection, there is no gas moving over that valve. Modern gasoline blends contain detergents (like Techron and the like) which clean these valves and keep carbon from building up.

Some manufacturers have included supplemental port injection of gasoline with their DI engines for the sole reason of combating this issue.

https://www.youtube.com/watch?v=aOksuRwfovw

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
direct injection	jetguy	Engine & Drivetrain	16	11-17-2015 03:46 PM
Direct Injection!	tvfreakazoid	Nissan 370Z General Discussions	62	12-28-2009 05:34 PM
Direct Injection??	Z-WHIZ	Nissan 370Z General Discussions	9	09-24-2009 11:47 PM
Direct injection anybody? Come discuss!	LiquidZ	Nissan 370Z General Discussions	6	02-06-2009 02:09 AM

06-04-2014, 10:19 AM	#1 (permalink)
cheshirecat A True Z Fanatic Join Date: Jan 2009 Location: Florida Posts: 1,428 Drives: N54 135i Rep Power: 293	Unfortunately, DI carbon buildup spans many different engines and manufacturers. Some are better than others, but many DI engines from Audi, Mazda, BMW, and others still require carbon cleaning due to the nature of DI setups. In the video below, it shows how gas flows over the intake valve into the cylinder before firing. With direct injection, there is no gas moving over that valve. Modern gasoline blends contain detergents (like Techron and the like) which clean these valves and keep carbon from building up. Some manufacturers have included supplemental port injection of gasoline with their DI engines for the sole reason of combating this issue. https://www.youtube.com/watch?v=aOksuRwfovw