Kracka's MAP EF2X turbo dyno results - 416WHP on pump gas!
Oct 19, 2011, 06:16 PM
#1
Kracka's MAP EF2X turbo dyno results - 416WHP on pump gas!
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.
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.
Oct 19, 2011, 06:53 PM
#2
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Awesome write up as usual, I am amazed how fast it actually spools up compared to stock (only 150rpm move than stock I believe is what I was told :P). Only negative side that I can even think of is the drop in torque. You know me, I love torque lol but you did pick up a lot of WHP and while driving you seem to have enjoyed it so far 
Gratz again and keep us posted with more info as you get it
Gratz again and keep us posted with more info as you get it
Oct 19, 2011, 07:24 PM
#3
I feel like that torque loss is kinda over-stated in the graphs. That little loss in spool is going to be nothing in the real world and the gains up top are going to be all that matters. MAP seems to have hit a serious home-run with this turbo, perfect size for 100% stock long-block cars running pump gas or e85. Look how wide and flat the torque curve is! 300wtq from 3250-7000rpm--wow! This turbo is going to help keep the spirit of what it is--an evo! 
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Oct 20, 2011, 08:20 AM
#12
E85 results are here: https://www.evolutionm.net/forums/ev...o-results.html
Oct 20, 2011, 08:23 AM
#13
To be honest though, I don't have plans to do either. I like the reliability of the ported/coated cast manifold with a heatshield, plus I think the lower engine bay temps are a good thing for a DD street-car. I don't want to have to worry about melting my valve cover, sensors, wiring harnesses, etc. As far as the cams go, I want the car to remain as smooth and livable as possible since I do commute daily and sometimes get stuck in traffic. Cams and a lightweight flywheel really made my Evo IX a bear to drive in traffic and ruined the enjoyment of it for me.
Last edited by Kracka; Oct 20, 2011 at 08:31 AM.
Oct 20, 2011, 08:51 AM
#14
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You can heat wrap the manifold and spray with sylicone to keep the heat in. Or get the ones that are already coated. I don't think youd have to worry about melting anything. Are there cams available with decent gains but arent a crazy duration/lsa to give smooth driving? I'd do some more research before giving up!!
Last edited by sujomatt; Oct 20, 2011 at 09:17 AM.
Oct 20, 2011, 09:26 AM
#15
You can heat wrap the manifold and spray with sylicone to keep the heat in. Or get the ones that are already coated. I don't think youd have to worry about melting anything. Are there cams available with decent gains but arent a crazy duration/lsa to give smooth driving? I'd do some more research before giving up!!
I love the stock-longblock theme of this car, I say skip cams. Tubular manifold would definitely be an easy 25whp up top but chances are it would hurt the torque around 3500rpm a bit.
Cams might help up top 5-10whp but will definitely add torque down low, but the effort involved in installing may not be worth it unless you are taking the head off for other reasons. I do love my kelford 214-b's they're a nice mix of driveability and torque/power gain--not too crazy of a cam.
Decisions decisions, just enjoy it for now