MAP EF-series Turbochargers results thread
Yea, well my injectors are maxed out right now but I'm at around 460 ish on VD at 27psi with alot more tuning to go. I absolutely love it on the highway, it pulls like crazy, but riding around town I kinda miss the spoolup of the stock turbo as I DD the car.
Again, PEAK. Peak means AT HIGHEST. There is a thing called a powerband. Let me show you the difference between a stock turbo and an EF2 (note: this is on an Evo X, but it's still a valid demonstration)
And not to be rhetorical, but let's say you have a stock turbo @ 420 whp PEAK vs an upgraded turbo like an HTA Green or EF2 etc @ 420 whp PEAK... based on the powerband differences I've shown you, which do you think is faster?
id be willing to bet lots of money that a 9 or even 8 would destroy a X on the road course with same power/weight
wheres all these X's with weight reduction and good power whooping up on the road coures auto x's?
wheres all these X's with weight reduction and good power whooping up on the road coures auto x's?
^You are joking right? You are drunk lol 
Seriously though, if the X had the same power/weight its not a contest even on a road course. Did you not ever see the AMS time attack car or Ryan gates? They won basically every race they were in. AMS just moved on to GTR's.
Seriously though, if the X had the same power/weight its not a contest even on a road course. Did you not ever see the AMS time attack car or Ryan gates? They won basically every race they were in. AMS just moved on to GTR's.
I absolutely hate arguing about X vs 8/9 because i genuinely like the X for what it is, but i'm sick of X guys bringing up Ryan Gates when they talk about time attack like he's the end all of racing. he is ONE example State side, and maybe the only one. CT9As mop the floor around the world where Xs aren't even competitive if you talk about all out time attack - Evo 9s and Evo 6s scored two 1-2 finish in both Pro and Open class in World Time Attack 2012 alone. and we're not even talking about Tsukuba time attacks where Evo 5-8s have held the street car record for 10+ years.
stock for stock Xs have S-AYC, which is much better than the neutered 1 way rear LSD found in USDM 8/9s, hence less understeer. if you watch JDM videos or EUDM videos, the reviewers never say anything about a huge chassis balance disparity between the 2 generations because JDM Evos have had AYC since Evo 4.
either way, most guys with high power S-AYC/AYC cars (JDM Evo 4+ to Evo X) either swap to built USDM rear diffs because they can handle more power, or they go with real aftermarket 1.5 ways (Cusco, ATS, OS Giken etc)
now lets keep this a MAP EF turbo thread
stock for stock Xs have S-AYC, which is much better than the neutered 1 way rear LSD found in USDM 8/9s, hence less understeer. if you watch JDM videos or EUDM videos, the reviewers never say anything about a huge chassis balance disparity between the 2 generations because JDM Evos have had AYC since Evo 4.
either way, most guys with high power S-AYC/AYC cars (JDM Evo 4+ to Evo X) either swap to built USDM rear diffs because they can handle more power, or they go with real aftermarket 1.5 ways (Cusco, ATS, OS Giken etc)
now lets keep this a MAP EF turbo thread
I absolutely hate arguing about X vs 8/9 because i genuinely like the X for what it is, but i'm sick of X guys bringing up Ryan Gates when they talk about time attack like he's the end all of racing. he is ONE example State side, and maybe the only one. CT9As mop the floor around the world where Xs aren't even competitive if you talk about all out time attack - Evo 9s and Evo 6s scored two 1-2 finish in both Pro and Open class in World Time Attack 2012 alone. and we're not even talking about Tsukuba time attacks where Evo 5-8s have held the street car record for 10+ years.
stock for stock Xs have S-AYC, which is much better than the neutered 1 way rear LSD found in USDM 8/9s, hence less understeer. if you watch JDM videos or EUDM videos, the reviewers never say anything about a huge chassis balance disparity between the 2 generations because JDM Evos have had AYC since Evo 4.
either way, most guys with high power S-AYC/AYC cars (JDM Evo 4+ to Evo X) either swap to built USDM rear diffs because they can handle more power, or they go with real aftermarket 1.5 ways (Cusco, ATS, OS Giken etc)
now lets keep this a MAP EF turbo thread
stock for stock Xs have S-AYC, which is much better than the neutered 1 way rear LSD found in USDM 8/9s, hence less understeer. if you watch JDM videos or EUDM videos, the reviewers never say anything about a huge chassis balance disparity between the 2 generations because JDM Evos have had AYC since Evo 4.
either way, most guys with high power S-AYC/AYC cars (JDM Evo 4+ to Evo X) either swap to built USDM rear diffs because they can handle more power, or they go with real aftermarket 1.5 ways (Cusco, ATS, OS Giken etc)
now lets keep this a MAP EF turbo thread
The motor is more efficient and the frame is stronger/more rigid...safety weighs it down. The AMS time attack evo took down the sierra sierra evo if I recall and basically took first place every race it went to. That is almost full race car style and it could hang with pretty much anything.
I am not taking anything away from the 8/9 its an awesome platform and I love it and respect it.
Sorry, my "short response" was longer than I thought, I still held back haha.
will the ef4 hold 38-39 psi to redline. Right now im on the internal wastegate and it spikes 38 but begins to taper down to 33. Im thinking about running map external wastegate and dump 02. Hope it will hold more boost up top. Have searched everywhere but can't find anything on how much boost this turbo can hold out.
will the ef4 hold 38-39 psi to redline. Right now im on the internal wastegate and it spikes 38 but begins to taper down to 33. Im thinking about running map external wastegate and dump 02. Hope it will hold more boost up top. Have searched everywhere but can't find anything on how much boost this turbo can hold out.
see this is what I've been trying to find out. I have the 18 psi internal wastegate actuator now making right around 600. If I can get it to hold boost from 6500-8500 that's roughly gonna be another 30-40 whp. I just haven't been a dyno graph of anyone running more than 35 on this turbo.