Kracka's MAP EF2X turbo dyno results - 416WHP on pump gas!
#31
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This car has a lot of mods here and there
Do we really need all those additional bolt-ons for this turbo to run efficiently? In other words, considering it does not do much torque (and possibly runs the air cooler than the stock turbo since the stock unit runs too hot at high boost), could we just add this turbo to a Stage 2 car and have good gains? My car is currently stage 2. I am considering a turbo upgrade, but I would much rather just change the turbo and leave the rest as is. In fact, I'd rather not even change the stock FMIC
Do we really need all those additional bolt-ons for this turbo to run efficiently? In other words, considering it does not do much torque (and possibly runs the air cooler than the stock turbo since the stock unit runs too hot at high boost), could we just add this turbo to a Stage 2 car and have good gains? My car is currently stage 2. I am considering a turbo upgrade, but I would much rather just change the turbo and leave the rest as is. In fact, I'd rather not even change the stock FMIC
#34
Originally I had purchased a FP Green but then decided to go for the EF2 instead. Cobb has a lot of experience with the Green and estimated I would pick up ~40whp with the Green on stock cams. I ended up gaining 48whp with the EF2 so I'm going to call that very close and say the peak gains would be equivalent, but with the advantage of spool and transient response going to the EF2. These turbos are all in the same ballpark.
#35
Thanks for the graph and write up!
I've been doing as much research as possible already, looking for the same thing you were, quick spool, good drivability, and most importantly realiability.
Hopefully there will be more people who try this turbo out and post up their graphs, this turbo looks impressive, since most greens/lites I see ususally gain 40-50whp over the stock turbo in the higher RPMs, but don't quite have the same spool as this, which makes this a very good possibility for my next turbo.
I've been doing as much research as possible already, looking for the same thing you were, quick spool, good drivability, and most importantly realiability.
Hopefully there will be more people who try this turbo out and post up their graphs, this turbo looks impressive, since most greens/lites I see ususally gain 40-50whp over the stock turbo in the higher RPMs, but don't quite have the same spool as this, which makes this a very good possibility for my next turbo.
#36
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This car has a lot of mods here and there
Do we really need all those additional bolt-ons for this turbo to run efficiently? In other words, considering it does not do much torque (and possibly runs the air cooler than the stock turbo since the stock unit runs too hot at high boost), could we just add this turbo to a Stage 2 car and have good gains? My car is currently stage 2. I am considering a turbo upgrade, but I would much rather just change the turbo and leave the rest as is. In fact, I'd rather not even change the stock FMIC
Do we really need all those additional bolt-ons for this turbo to run efficiently? In other words, considering it does not do much torque (and possibly runs the air cooler than the stock turbo since the stock unit runs too hot at high boost), could we just add this turbo to a Stage 2 car and have good gains? My car is currently stage 2. I am considering a turbo upgrade, but I would much rather just change the turbo and leave the rest as is. In fact, I'd rather not even change the stock FMIC
Don't forget that adding mods to stock turbo will yield different gains than on an aftermarket one....it's all about percentages. Ported stuff might yield say 10whp on a stock turbo but on an aftermarket one it might be 15+
#40
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The clutch slipped in 5th a bit so I threw in the ACT 6 puck but still had some grab left even after 24k miles.
The head bolts and head gasket are pretty damn good on the X, very very few people have had problems.
I'd say the rods will go first imo.
#44
I like this turbo....A lot. It spools basically like stock, pulls to redline, and adds about 50whp on top, all the while being within reliable limits of the block. All pros no cons...if I ever upgrade...indeed, it will be this.
#45
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- Does it require bigger injectors even for non-E85 fuels?
- Stock 2011 GSRs can hold the boost up to as much 28-29 PSI; so perhaps '11 models wouldn't need a 3-port solenoid, either?
I am seriously considering this turbo before next summer, and was thinking I would install it along with ETS's downpipe to maximize its flow, and injectors (w/ pump) only if it's necessary, and that's it.
In other words: '11 Evo X Stage 2 (see signature) + EF2X + downpipe + injector/pump (if necessary): What do you guys think about this combo?