Direct injection and forced injection do not play well at all. Valve deposits like crazy on near new cars. It is really bad and car manufacturers are having a hard time keeping up with the repairs.
The post above mine is better haha.
Bolt on turbo kit (13 Viewers)
- Thread starter scottryana
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Direct injection and forced injection do not play well at all. Valve deposits like crazy on near new cars. It is really bad and car manufacturers are having a hard time keeping up with the repairs.
The post above mine is better haha.
the new gen2 ecoboost in the 17's is now both direct and port.Well I am not so sure that is a benefit of GDI (Gasoline direct injection) the main benefit of GDI is increased fuel efficiency, since you are wasting very little fuel and you can also run leaner. The biggest problem with traditional fuel injection is you can really only inject fuel efficiently when the intake valves are open enough to get the fuel in the chamber. The timing of the valves and injectors are not as precise and you end up with a less than perfect atomization of fuel on the closed valve at the beginning and end of the intake cycle. With GDI you have the injector sitting in the combustion chamber and it can spray fuel at anytime including the end of the exhaust cycle.
So while you could not get the same fuel mileage out of the 3.5L Ecoboost with port injection you could make the same power at the same RPM's just at the sacrifice of MPG.
One of the downsides that many people are finding with the GDI engines is that without fuel being sprayed on the back of the intake valves they are getting terrible deposits which limit air flow and cause sealing issues. (One of the reasons you hear fuels claim they have detergents added). SO many manufactures are doing both port and GDI.
This is a picture from F150ecoboost.net what shows the Ecoboost valves.
also the 3.5L in the 16 Tacoma is both direct and port. although NA the direct injection on the Tacoma allows them to run Atkinson cycle for efficiency.
- Thread starter
- #283
Makes sense, you get the benefits of GDI like better fuel mileage but without the issues like carbon build up. Toyota has been doing it that way for a while.
so if it was super rich it wouldn't detonate even under the crazy cylinder pressure it takes to make 500ft*lb out of 3.5L at 2600rpm
I don't know the static compression ratio but it's making 18+psi boost in the low 2000's. seems like it would be a pinging disaster normally.
I don't know the static compression ratio but it's making 18+psi boost in the low 2000's. seems like it would be a pinging disaster normally.
- Thread starter
- #285
Nope, it wouldn't be that much richer, we are talking about tenths of a point. Maybe a half at most. I ran 700ft/lbs out of a 3.8L at 2500rpms with my GTR and only port injection.
The GenI 3.5L was 9.3:1 compression and the GenII is 10.0:1.
And this is going to be a pretty bold but educated guess. When you are targeting that kind of boost with the 3.5 Ecoboost you are probably looking at an AFR of 11.5:1 maybe a touch leaner, while on a port injected engine that is similar like the GTR I would be targeting 11:1.
The GenI 3.5L was 9.3:1 compression and the GenII is 10.0:1.
And this is going to be a pretty bold but educated guess. When you are targeting that kind of boost with the 3.5 Ecoboost you are probably looking at an AFR of 11.5:1 maybe a touch leaner, while on a port injected engine that is similar like the GTR I would be targeting 11:1.
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The Tacoma hunting gears is from lack of torque, I believe. The transmission makes up for it by shifting so much, at the cost of annoying the driver. My SC 80 series climbs big hills at speed, and passes people with tons of power and rarely drops a gear (unless I matt it) because it makes so much torque. My wife's 4runner would give my 80 a tough time in a drag race but I would rather drive the 80 any day.
Do we need new, bigger exhaust for this kit? Sorry if this has been asked already.
- Thread starter
- #288
What is the restriction on the oem exhaust? How to make it sounds better with the turbo?
- Thread starter
- #290
I don't understand the question.
Yes the stock OEM exhaust is fairly restrictive, but this isn't a huge power setup so it won't be a problem. Turbo's alone help quiet down the exhaust, with a turbo and the factory exhaust it will be pretty quiet.
Yes the stock OEM exhaust is fairly restrictive, but this isn't a huge power setup so it won't be a problem. Turbo's alone help quiet down the exhaust, with a turbo and the factory exhaust it will be pretty quiet.
Thank you. I thought it was the opposite.
nukegoat
Should have bought a Jeep
Lets talk about this gtr - was it faster than the cruiser?
- Thread starter
- #293
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You sold it why? My dream car.
- Thread starter
- #295
Haha, we have gotten really far off topic from the bolt-on turbo kit, but yes I sold it. This was my second GT-R, I had a 2009 when they first came out and this was a 2012 after the first refresh. They are very fun cars, incredibly fast but I was getting a little bored. I had done just about everything you could do without spending $20k+ for a built engine, and built transmission. And then I decided to give up a very good career and go back to school, which is a terrible decision btw haha, so toys had to go.
NLXTACY
Wits' End
- Thread starter
- #297
Oh well being single and back in college at was not a bad thing. haha.
But at least you're still married to a kind and gentle...
NLXTACY
Wits' End
What, Ramen noodles and 40oz cheap beer for a buck? Ahhh, college days.
nukegoat
Should have bought a Jeep
Gtr, power rack, white dude name like Ryan. Looks like we gotta a 'bro'
Jk man. Im envious
Jk man. Im envious
