HEAVY work underway at Full-Race (EFR ecoboost upgrade)
If you guys have facebook, check Full-Race's page. They are giving updates on their turbo upgrade for the EB. Nothing crazy yet, but they have been prepping manifolds for the EFR turbos. :party:
Correct me if I'm wrong, I believe the limiting power of the eco is the fuel system, not the turbos. I believe it's the tuners themselves that are saying this which mean upgrading the turbos will probably be marginal gains, possibly offest by a loss in the low end.
My point being if I had an eco I would want to see some fuel system parts in that picture.
Franchi Motorsports
09-26-2012 04:25 PM
Full race def knows what they are doing from what I've heard of them prior so I'm sure they will address the fuel issue at some point.
Centexguy
09-26-2012 04:38 PM
Judging by the size of those turbos, I'd say those will take the fuel system to its limits. Need more air.
prime8
09-26-2012 04:41 PM
Wicked.
mr_diggs
09-26-2012 05:18 PM
Rick from Livernois told us a while back that we have plenty of fuel :-)
engineermike
09-26-2012 05:30 PM
Originally Posted by mechanicboy
(Post 2060655)
Correct me if I'm wrong, I believe the limiting power of the eco is the fuel system, not the turbos. I believe it's the tuners themselves that are saying this which mean upgrading the turbos will probably be marginal gains, possibly offest by a loss in the low end..
Increasing the size of turbos affects power in a lot of ways, not all of which require more fuel. You'll get a bigger compressor that runs at a more efficient place on its map. Typically, OEM turbos are sized smaller than peak efficiency to improve spoolup. Running a bigger compressor in a more efficient zone reduces the shaft hp required to spin the compressor. This allows the turbine to not work as hard, leading to the wastegate bypassing more exhaust, thus reducing exhaust/drive pressure. Furthermore, the larger exhaust wheel will flow more mass for a given pressure. This, again, reduces exhaust pressure. All these reductions in exhaust pressure reduces pumping losses during the exhaust stroke. Keep in mind that typical turbo exhaust pressure can be as high as 50 psi (this is the turbo's equivalent to "parasitic drag"). Dropping this to 30 psi will greatly improve hp without requiring more fuel. All this is accomplished at the same boost level, too, so engine safety and longevity is also improved.
The trade-off is spool time, as you suggested.
mr_diggs
09-26-2012 05:43 PM
Originally Posted by engineermike
(Post 2060829)
Increasing the size of turbos affects power in a lot of ways, not all of which require more fuel. You'll get a bigger compressor that runs at a more efficient place on its map. Typically, OEM turbos are sized smaller than peak efficiency to improve spoolup. Running a bigger compressor in a more efficient zone reduces the shaft hp required to spin the compressor. This allows the turbine to not work as hard, leading to the wastegate bypassing more exhaust, thus reducing exhaust/drive pressure. Furthermore, the larger exhaust wheel will flow more mass for a given pressure. This, again, reduces exhaust pressure. All these reductions in exhaust pressure reduces pumping losses during the exhaust stroke. Keep in mind that typical turbo exhaust pressure can be as high as 50 psi (this is the turbo's equivalent to "parasitic drag"). Dropping this to 30 psi will greatly improve hp without requiring more fuel. All this is accomplished at the same boost level, too, so engine safety and longevity is also improved.
The trade-off is spool time, as you suggested.
I think they are planning a couple of setups. The smaller series EFR turbos spool insanely quick for what they are however a single twin-scroll large series turbo would be cool too. I'm thinking that with the spool speed of a twin-scroll design along with the EFR's natural quick spooling....might have a winner. I'm excited!!!
Rick.....call those guys and talk them into tuning through Livernois. :thumbup:
