I'm not going to bother with this anymore.
Sure you can!
Ehh you kind of can. Staying off the throttle, out of serious boost, the car will act just like a typical 4 cylinder as you know and will get fuel economy as such. Since these larger turbos aren't spooling until later in the power band, that means that there are fewer PSI down low in the RPM range during a typical metro-highway drive cycle. Every PSI of boost that is applied, there must be a certain additional amount of fuel added to the mixture to maintain the AF ratio. Fewer PSI means that there can be less fuel used. So, in short: less boost during daily driving means less fuel which means better fuel economy.
Sir. Are you suggesting the stock turbo might have some fight left in it, or are you refering to a different precision upgrade?
5858 vs 6466
Straw man? Nothing like that actually...
Just want to add onto this, aside from the MPG that some of the GT guys are getting (i look around in the FI subsection every now and then), look at the issues they're having after adding a supercharger. sure they're making 500+ RWHP, but some are having idle stumbling issues, part throttle hesitation, rough idles, etc. Some guys are revising their tunes several times before its just right, and even then it requires more finessing. One tuner mentioned that the GT ECU is extremely complex, more so than the last generation, and most tuners can't get FI tunes to make a car run properly. Mind you, some of these guys are already $8k into an FI system, and their car isn't running properly. But hey, they're making over 500RWHP!Because we are into our car (with its current setup) for less than a stock GT and we are making more power than a GT, while saving money everyday by NOT owning a GT. The Ecoboost holds a cheaper insurance rate, as well as the MPG that was just discussed. If you haven't browsed through the S550 GT sections yet you should look at the MPG that these guys are getting, 6mpg here, 8mpg there, highway driving less than 20. I could beat on my Yukon XL non stop and still produce better MPG than that.
On a more serious note we are not here to discuss MPG, we don't really care about it we are just trying to make excuses on why we bought an Ecoboost over the GT. The simple answer is, because we wanted to. I freight train 2011-2014 Bolt on GT's with our car, and will do the same to 2015+ GT's stock and bolt on. We had the 2015 GT in our shop here, on the dyno, and drove it on the street. First hand experience gives me the authority to claim our EBM is faster on the street. I can't make the claim of being faster at the track until we are able to make it out there. I hope we can do at our event the 19th-21st this month. http://www.maperformance.com/proving-grounds/when/
Here is a little sneak peak from my tuning session last night with our EBM and turbo kit.
I will be swapping turbo's today hopefully and getting back on the dyno, we thought the turbo was the restriction in making more power but I found some tables in the Cobb software that opened up some more room.
We are OFFICIALLY out of fuel, which is good timing because our fuel system upgrade will be ready for full testing in about a week.
Which turbo is this with?Because we are into our car (with its current setup) for less than a stock GT and we are making more power than a GT, while saving money everyday by NOT owning a GT. The Ecoboost holds a cheaper insurance rate, as well as the MPG that was just discussed. If you haven't browsed through the S550 GT sections yet you should look at the MPG that these guys are getting, 6mpg here, 8mpg there, highway driving less than 20. I could beat on my Yukon XL non stop and still produce better MPG than that.
On a more serious note we are not here to discuss MPG, we don't really care about it we are just trying to make excuses on why we bought an Ecoboost over the GT. The simple answer is, because we wanted to. I freight train 2011-2014 Bolt on GT's with our car, and will do the same to 2015+ GT's stock and bolt on. We had the 2015 GT in our shop here, on the dyno, and drove it on the street. First hand experience gives me the authority to claim our EBM is faster on the street. I can't make the claim of being faster at the track until we are able to make it out there. I hope we can do at our event the 19th-21st this month. http://www.maperformance.com/proving-grounds/when/
Here is a little sneak peak from my tuning session last night with our EBM and turbo kit.
I will be swapping turbo's today hopefully and getting back on the dyno, we thought the turbo was the restriction in making more power but I found some tables in the Cobb software that opened up some more room.
We are OFFICIALLY out of fuel, which is good timing because our fuel system upgrade will be ready for full testing in about a week.
Imagine the PTE 6466 with the FFTec PnP 4Bar Tmap sensor! 35lbs of boost and POW 600whp!!!! :eyebulge:
Looking to learn something today (serious). How is the EB able to produce more power with less fuel? If I have a fixed amount of energy per gallon of fuel in both cars, what would the AFR have to look like to make more power than a stock GT while getting double the fuel economy? Or am I misunderstanding this? Under heavy throttle, lots of idling, city driving, spirited jaunts, I got my average as low as 10.5MPG in my GT while it was stock. Can't even begin to imagine what kind of driver can manage 6-8.
Volumetric efficiency. Average NA engine has ~80-85% efficiency, whereas FI can exceed 100% efficiency. Yes the 5.0 puts out good numbers but it's not efficient at it. There's a much more detailed response with in-depth thermodynamics and physics to be had but I am just a humble grease monkey.
