First of all, I want to thank multiple people and shops who helped make this happen! MAPerformance for their fantastic customer service and products, Cobb Tuning - Plano for taking the time and care I expect when working on my car and their attention to detail during tuning, and all my good friends for discussing setups, bouncing ideas off of, and shuttling me all around while my car was at Cobb!
I have been using Cobb Tuning - Plano for about a year now for tuning, labor-intensive installs, etc. so this should be a fairly accurate comparison since all dyno charts and tunes are from the same dyno with the same tuner, and oddly enough the weather cooperated and kept the conditions fairly consistent!
WW 2010 Evo X GSR SSS
93-octane pump gas
AFE DryflowS intake (stock MAF housing)
Cobb turbo inlet pipe
MAP EF2X turbo (ported/coated/HP WGA)
Grimspeed 3-port BCS
Nisei UICP
MAP FMIC
Depo LICP
Cobb XLE BPV
Mil.Spec 64mm throttle body
Mil.Spec ported intake manifold
ID1000 fuel injectors
Walbro 255HP fuel pump with Cobb install kit
PPI ported/coated exhaust manifold
MAP o2 elim downpipe (coated)
ETS testpipe
Cobb catback
*bold indicates new mod installed with the turbo
Below are the before and after charts. Blue is my previous setup, and red is the new setup. The only charges are above in bold.
horsepower/torque
boost/AFR
As you can see above, this turbo has huge gains above 6k RPM while still spooling like stock! Down low, besides for the change in noise (it sounds wicked), you'd swear you're driving a stock turbo car. It is just as responsive and spools almost identically, but once you get on it and it climbs into the upper RPM's it's like, "WHOA! WTF? Why isn't the power falling off?!?!" and it just keeps pulling! Very impressive indeed, I've yet to see a stockframe turbo spool like stock yet still provide these kinds of gains in the upper powerband.
I only have about 30 miles on it so far, but initial impression is that this is possibly the ultimate daily-driver street car turbo. Even at highway cruising speed in 5th gear when you lightly roll into the gas the turbo responds and pulls just like the stock turbo for effortless passing of another car. The slightest amount of gas is all it takes for this turbo to respond!
I'll continue to update this thread as I get more experience with this setup and get a better feel for it.
On to some pictures of the turbo...
Since there has been some discussion on the forum lately on how high pressure wastegate actuators should be pre-tensioned I will add that it did come out of the box pre-tensioned to half an eyelet/3 full turns from zero pre-tension. This actually turned out to be too much for what we were aiming for on my pump gas setup so all pre-tension was removed. The wastegate would begin to crack open around 19psi and would hold a steady 22psi; this should be about perfect for my setup so the ECU can still downward correct and I can run a conservative 91-octane "safe" tune while traveling in areas without good gas.
Linear Mode
