Re: GheyrodX - bigger, fatter, gheyer!
 

Aww, no more baby turbo? :) Looks sexeh, I love the ef-series compressor wheels.

Re: GheyrodX - bigger, fatter, gheyer!
 

Still looks baby to me :D I guess mine doesn't "look" much different lol.

Re: GheyrodX - bigger, fatter, gheyer!
 

How big is the EF2 inlet? 2.5"?

Re: GheyrodX - bigger, fatter, gheyer!
 

Right about that. The EF2 reuses the stock turbo inlet elbow.

Re: GheyrodX - bigger, fatter, gheyer!
 

Ooooh, shiny!

Re: GheyrodX - bigger, fatter, gheyer!
 

MAP EF2.5 installed and tuned by Cobb yesterday while I was in Austin, TX for an event.

426whp
393wtq
27.69 psig (peak) holding a flat 26 past redline.

Still on 93-octane pump gas and stock cams! Solid gains over the EF2, but definitely lost some spool and response. This is with the 3" anti-surge cover, but MAP also sent me a 3" standard cover so I'm thinking if I swap that one on I'll gain back some spool and response. I'll talk to MAP about it and go from there. The car is definitely a beast for a DD, and I believe this is the farthest Cobb has ever pushed the stock cams and it's getting up there for pump gas numbers too. My previous results on the EF2 were 413/384; peak boost was right about the same, ~27psi. I think this is yet another good turbocharger option from MAP. While not replacing any of the current models, it's a good fit between the EF2 and EF3 as intended.

small chart:
http://www.mitsustyle.com/photopost/...o_tune0001.jpg

big chart:
http://www.dsmstyle.com/photopost/da...o_tune0001.jpg

Re: GheyrodX - bigger, fatter, gheyer!
 

So it's the EF2 wheels, just different housings?

Re: GheyrodX - bigger, fatter, gheyer!
 

No. EF2 turbine wheel, but with a different compressor wheel that allows for the larger 3" inlet. The EF2 compressor wheel isn't big enough to warrant anything but the stock turbo inlet

Re: GheyrodX - bigger, fatter, gheyer!
 

So what size is the comp wheel?

Re: GheyrodX - bigger, fatter, gheyer!
 

It's the EF3's compressor wheel.

Re: GheyrodX - bigger, fatter, gheyer!
 

Tell Kevin or Calvin to get that shit up on the database!

Re: GheyrodX - bigger, fatter, gheyer!
 

I'm hoping Kevin gets it up tomorrow.

I just got back from a pretty good drive and the car really does rip and pulls hard all the way to rev-limiter! It drives really smooth throughout the RPM range, I'm giving thanks to the anti-surge for that. I would like to get a touch of response and spool back though, so I'm thinking it would be ideal to give up a bit of that smoothness in the name of response and swap over to the standard cover. I'm questioning whether this turbo actually needs the anti-surge ports.

Re: GheyrodX - bigger, fatter, gheyer!
 

Yea, probably ~56mm compressor about the size of an FP Red.

My BBX had a stock compressor cover on it and was even bigger than this compressor setup so going back to a non-antisurge should work just fine. You have mivec to take away any surge that might 'just happen' from the conversion. Should add another 1-2% everywhere powerwise so you might just hit 430 :)

Honestly I'm a tish skeptical if it will really help down low though but I really don't think it will hurt to try.

Re: GheyrodX - bigger, fatter, gheyer!
 

That kind of power on stock cams and pump is very amazing. Very nice!

Re: GheyrodX - bigger, fatter, gheyer!
 

Re: GheyrodX - bigger, fatter, gheyer!
 

Looks like it needs more boost thrown at it to better illustrate the difference.

Re: GheyrodX - bigger, fatter, gheyer!
 

Look like the ef2 is better. The spool up doesnt look all that great on the 2.5

Re: GheyrodX - bigger, fatter, gheyer!
 

I'm discussing with MAP and we have a few ideas on changes to try. This is why it's called prototype testing I suppose :D

Re: GheyrodX - bigger, fatter, gheyer!
 

Yea I agree, for the "ultimate street turbo" you are after Kracka I don't see the advantage with the 2.5. Hell, my EF4 is only about 200rpms behind your turbo up to 27psi and I am not even on full mivec (obviously totally different setups, but still).

EF2 ftw on your car. /pray new cover helps.

Re: GheyrodX - bigger, fatter, gheyer!
 

Hughes you should run that thing down the 1/4 mile someday. I don't really care about the ET but i'm curious as to what sort of trap speeds it would pull.

Re: GheyrodX - bigger, fatter, gheyer!
 

Some day I will do that for you. Maybe once the stock clutch goes and it's replaced with something a bit beefier.

Re: GheyrodX - bigger, fatter, gheyer!
 

I agree fully. My previous EF2 is the better "ultimate street turbo" all things considered, but we'll see how the standard cover performs. If I can gain back half the spool lost then I think we'll have a viable contender. MAP has asked me to get it done so I'll be calling Cobb to get something on the calendar.

Re: GheyrodX - bigger, fatter, gheyer!
 

Cobb's power board, before & after:

15th ---> 13th
https://sphotos-b.xx.fbcdn.net/hphot...22161203_n.jpg

Re: GheyrodX - bigger, fatter, gheyer!
 

Those cars area all really close. I guess for good reason, stock block cars I am guessing.

Re: GheyrodX - bigger, fatter, gheyer!
 

You can scan the QR codes, or just go to their online dyno database for all the info/details on each setup (since you probably can't scan the tiny on-screen codes).

Re: GheyrodX - bigger, fatter, gheyer!
 

What kind of gains do you think some cams would net you?

Re: GheyrodX - bigger, fatter, gheyer!
 

A lot :) Cobb keeps pushing me towards Kelford-B cams, but I keep pushing back fighting to keep my stock-like smoothness and drivability.


I'll have standard 3" compressor cover results on Saturday, December 22nd.

Re: GheyrodX - bigger, fatter, gheyer!
 

are they planning to try this ef2.5 on the evo 8/9s?

Re: GheyrodX - bigger, fatter, gheyer!
 

Depends on the results on the X, but if it's a solid performer and sells well, then yes.

Re: GheyrodX - bigger, fatter, gheyer!
 

yeah i was at map yesterday doesnt sound like its in the plans but like you say if it performs why not

Re: GheyrodX - bigger, fatter, gheyer!
 

Standard cover testing begins today. GheyrodX had a sleepover last night with some foxy Subaru bitches ;)

Re: GheyrodX - bigger, fatter, gheyer!
 

I approve of your description of Subaru's as bitches :)

Good luck.

Re: GheyrodX - bigger, fatter, gheyer!
 

Nice! Looking forward to seeing this next week.

Re: GheyrodX - bigger, fatter, gheyer!
 

Here are my latest results, these are with the standard 3" compressor cover rather than the 3" anti-surge cover. This seems to be the winning setup if you ask me; 200 RPM quicker spool, better response, more torque, nearly identical horsepower, and of course one less option to pay for :)

http://www.dsmstyle.com/photopost/da..._EF2_5_std.jpg

Driving impressions are great! No surge issues could be felt and it drove very nicely. Initial impressions are it drives just as smooth as the anti-surge version, but give me another few days to truly experience the turbo in more scenarios. Oddly enough, turbo intake noise is slightly more with the standard cover than with the anti-surge version.

My final verdict: Standard cover is the way to order this turbo. Save yourself a few bucks and enjoy the quicker spool/response times!

Re: GheyrodX - bigger, fatter, gheyer!
 

Badass! I was second-guessing this wheel combo but it looks pretty pimp now!

Re: GheyrodX - bigger, fatter, gheyer!
 

Looks like good results with the std cover. Nice power on 93 too.

Re: GheyrodX - bigger, fatter, gheyer!
 

More power under almost the entire curve too! Nice!

It would be nice to see an over lay of the standard cover EF2.5 vs the EF2 once they get the database updated.

Re: GheyrodX - bigger, fatter, gheyer!
 

Should be available next week.

Re: GheyrodX - bigger, fatter, gheyer!
 

EF2 vs EF 2.5 standard cover:
http://accessecu.com/dyno/graph.php?...rgb2=204000000

Not sure which I like better, the extra low end grunt of the EF2 or the higher peak and top end of the EF2.5.

http://accessecu.com/dyno/graph.php?...rgb3=000153000

Re: GheyrodX - bigger, fatter, gheyer!
 

I'd still take the 2. On a more basic setup, aka no porting, I might go for the 2.5 but his setup is efficient so 2 all the way