Direct injection
Thread Starter
Le Mans Master
Joined: Mar 2010
Posts: 5,909
Likes: 651
From: St. Louis
Direct injection
I believe the LS7 is not "direct injection" was 100% sure.
There has been issue with direct injection causing intake valves to have a problematic with intake valves carbon-ing up.
Is there a handy list of cars with and with-out direct injection?
I think the c7 LT based motors are DI.
There has been issue with direct injection causing intake valves to have a problematic with intake valves carbon-ing up.
Is there a handy list of cars with and with-out direct injection?
I think the c7 LT based motors are DI.
Drifting
Joined: Jul 2008
Posts: 1,799
Likes: 447
From: FEMA Region 4
I believe the LS7 is not "direct injection" was 100% sure.
There has been issue with direct injection causing intake valves to have a problematic with intake valves carbon-ing up.
Is there a handy list of cars with and with-out direct injection?
I think the c7 LT based motors are DI.
There has been issue with direct injection causing intake valves to have a problematic with intake valves carbon-ing up.
Is there a handy list of cars with and with-out direct injection?
I think the c7 LT based motors are DI.
Melting Slicks
Joined: Oct 2007
Posts: 2,398
Likes: 858
I'm not sure where the list is, but you are correct on the LS7 and LT engines. The V6 in the Camaro is also direct injected. GM claims to have designed the cylinder heads in the LT engines to not carbon up like earlier direct injection implementations. I've read quite a bit about it on the BMW forums.
It happens because DI engines do not spray fuel into the intake valve track and on the back of the intake valve. So the valve isnt washed by fuel and can build up carbon.
They claim this is mostly a thing of the past prior to 2010 and has been corrected by engine design and ECU programming since. It can still occur due to sub standard fuel use over a period of time.
Last edited by dar02081961; Feb 18, 2015 at 05:26 PM.
