Tune, injector blending, and carbon build up
06-28-2018, 10:14 AM
#1
Senior Member
Thread Starter
Tune, injector blending, and carbon build up
I've been considering an omega tune for my 2018 5.0. Someone had posted a car and driver article stating that ford runs a minimum of 5 - 10 percent of port injection at all times to mitigate carbon build up. Does anyone know how tuners are blending injectors or any experience with this? I know the dual injected 5.0 is too new for any practical experience. Not sure if I'm ready to roll the dice on a warranty, confounded by the 1st year for this engine...
06-29-2018, 07:34 AM
#4
No fart cans allowed
Just from what I have read, they use more port injection during cold starts since that apparently is when the majority of carbon buildup tends to occur. It is also used during high demand (basically full throttle) throttle application to add additional fueling/power.
The following users liked this post:
chimmike (06-30-2018)
06-29-2018, 10:46 AM
#5
Senior Member
The mixture from the factory is 90 DI 10% port at WOT.
At cold start and rpms 2000 and below, the mixture is basically 99% port injection for getting parasitic losses down from the DI pump.
At cold start and rpms 2000 and below, the mixture is basically 99% port injection for getting parasitic losses down from the DI pump.
The following users liked this post:
chimmike (06-30-2018)
06-29-2018, 01:49 PM
#6
Senior Member
I wouldn't be the least bit concerned about valve coking since it wasn't really an issue on the pure GDI fords. Any port injection at all will likely keep the valves even cleaner than they would have been.
06-30-2018, 02:42 PM
#7
Senile member
it wasn't? The Mazda MZR-DISI was a Ford design (and build....Ford stamped all over everything on that motor) and it had horrendous valve carbon buildup. 60k miles or so and you'd need to walnut blast the valves to get it off. So the 3.5EB gen1 never had valve carbon buildup issues?
Trending Topics
06-30-2018, 03:30 PM
#8
Senior Member
Ford holds some interesting patents to address carbon buildup on GDI engines without port injectors. I don't have first hand proof of which engines ford used it on but there are far more 3.5 eb's on the road than most, maybe any, other GDI engine and very few actual reported problems since they came out in 2011. Seems like way more have broken con rods and windowed blocks than coked up valves.
The following users liked this post:
chimmike (06-30-2018)
06-30-2018, 04:57 PM
#10
Senile member
Ford holds some interesting patents to address carbon buildup on GDI engines without port injectors. I don't have first hand proof of which engines ford used it on but there are far more 3.5 eb's on the road than most, maybe any, other GDI engine and very few actual reported problems since they came out in 2011. Seems like way more have broken con rods and windowed blocks than coked up valves.
That's part of the reason I got the 2nd gen 3.5EB....port injection to combat any potential carbon buildup.
I also know Switzer (GTR modifying experts) swapped out port injectors on their raptor project and made some good power with bigger turbos.
