I got my 2006 STi for about a year now and I am thinking about a turbo upgrade. Anybody know a good turbo setup for the 06 STi?

Thx Guys

 

For a daily driver with quick spool, many seem to like the 20G or the FP Green with bigger injectors, fuel pump, and pro tune with Cobb or Ecutek engine management.

 

recommending what turbo you should run is like recommending what music you should listen to How much mor edo you want to get? Are you looking for big turbo that will make alot of power on better gas or a smaller quick spooling turbo that will be ideal on pump gas?
I've had both (5 now actually) so I could throw you some advice, what else power wise have you done to your car already? If youve been dynoed what are you putting down?

 

if i had a sti? i would get a red..

 

I am looking for quick respond and a FMIC.

 

I want a good pump gas turbo (91 cali) for a 06 WRX

Super

 

hey krinkov,

don't know if you remember...i bought your volk gtp's a while back...??? can i take you up on the recommendations...???

i have an '04 STi, Borla Hush tbe, helix catless dp, and ecutek re-flash by Mike (formerly of...well...you know). got the ok from wifey, and i'm now ready for a turbo upgrade. looking for something bolt on and run the least amount of supporting mods (willing to go fmic and the like). my performance goals are 300-350 wtq/whp on pump gas. its a daily driver. i'll never see a track, will never use 100 oct, and i'm looking for low to mid range (rpm) performance...not too concerned about the top end. the FPGreen seems like a nice choice. what about the FPRed...? what does the "grape vine" have to say about this Helix RR500?

going through as many turbo's as youve gone through...you would know. any info would be a appreciated.

thx,

Na'im

 

"quick response" and "FMIC" are usually at odds with each other, no matter what size turbo you run, an FMIC will have a noticable effect on spool and response. Running a smallish FMIC(hyperflow) on my stock turbo added too much lag for me, so this would only increase with a larger turbo. Try getting someone to let you drive a an STI with an FMIC on it, perferably with a stock or smallish turbo, to see if you can even live with an FMIC before you make any decisions, once you cut that bumper your pretty much committed

This is why I love the 06, you already have(basically) the STI longblock, all you need is to find a VF39 and STI topmount (about $300 each nowadays) and get an accesspot and you have an STI! and yeah the VF39 is a really sweet 91 oct turbo, I hit 270whp/301wtq at gruppe-s with mine and just a turbo-back and headers(headers do wonders for the 2.5) and a good tune. On the Gruppe-s Mstang dyno STIs usually baseline around 220whp for reference. For you this option is so chap and fun I would suggest running that for a while, since once you go bigger you will also need injectors and a fuel pump. If you do want a bit more you can run what Im running right now, a 20G.

the VF39 runs great on 91oct but runs out of breathe and can only hold about 12pis out to redline, thats why you can never get the HP numbers up as high as the tq, the 39 is just maxed out on a 2.5 motor and you need a bigger turbo to hold the boost out longer, then you can get the hp numbers even with the tq. I head from alot of people the 20G could do this and spool like stock, but I held out on trying one for a long time since these mitsu turbos are all about 20 years old tech, still with sleave bearings, coming off all ball bearing turbos I really didnt want to take a step back, and didnt think it would respond as well as everyone says, but yeah it does. Almost, right now Im running a the smaller TD05 20G, last I put down was 296whp/305wtq on 91oct, and while not dead even on spool with the VF39, it was only about 200rpm behind, honestly though, the spool difference was small enough that if I didnt see it on the graph and try really hard to notice it before and after it would have been hard for me to tell the difference from before/after. Alot of guys with STIs automatically go for the bigger TD06 20G, but this adds quite a bit more noticeable lag and only about 5-10 more whp on 91oct, yeah it will make more of a difference on race gas than a TD05, but I dont think the additional lag is worth the extra 5-10whp on pump. For getting the most out of 91 oct on a 2.5 with almost no added lag of a VF39, the TD05 20G is hard to beat

Right now though Im about to switch out (again!) to a APS SR40. this tubo is about the size of an FP Green (which is based of the 20G but about one size bigger than the TD06 20G) but the SR40 is built using Garrett met GT series of twin ball bearing cartridges. Ive driven a couple of these in STIs and they spool almost dead even with my TD05 20G but make a good bit more power on 91oct, my buddy miguel hit 323whp/320wtp at Gruppe-s with one and stock top mount. The only problem with these are the price, look to pay about 1700-1800 new for one of these, the 20Gs can be had for about 1100-1200 new. Heres my SR40 next to a VF39, its aboutthe same size physically as my TD05 20G

 

Hey Bro! Still my favorite wheels ever, though Ive had about 5-6 differnt sets since then

Yeah check out my post above, any of those turbos would be fine to run without a FMIC, and either of the 20Gs will get you at or really close to 300/300 on 91oct, especialy if you do my intercooler mod too(scroll down)
https://www.i-club.com/forums/showth...1&page=1&pp=20

problem with pushing over 300/300 is then you really need to start switching alot of other things. On top of the FMIC becoming a good idea, you will need a bigmaf, also the clutch is usually great out to 320wtq before it starts slipping, and once you start pushing alot over 300 on 91oct you really have to start worring about the cast stock pistons If you keep your goals around 300/300 you can avoid alot of extra cost and keep a good size quick spooling turbo and keep your car relatively reliable and worry free. hope that helps!

 

i have a fp td06 20g for sale. pm me if you are interested.

 

Hey 209,

I do not even pick my car up until this weekend! So I am doing some research right now. My other WRX is leaving the garage this weekend which was a Stg 4 02. I wish that I had the money to pick up the 20G and let it sit while I collect all of the other required parts. Thanks for the offer!!

Later Super

 

great feedback!!! looks like a have a couple of weeks to decide anyway...

thx again!

 

hey, if youve been running around with a stage 4 03 you should know all this stuff!

Yeah Im done with big turbos, who cares if it will make 400whp on race gas?? I'll be swiping the lane in front of you on the freeway while your waiting to spool up

 

So what do you think about a VF-22?? They can be picked up really inexpensively and it is a bigger turbo than the VF-39

Super

 

the VF22 puts out only a bit more CFM than a 39/34, and its notoriously laggy. A cheap price tag isnt a good enough reason to go with a 22, you can get into a 16G which puts out the same amount of air as a 22 but spools as fast or faster than a VF34 for only $699
http://linux.forcedperformance.net/m...egory_Code=WRX
for $175 you can upgrade the 16G to an 18G which is still a sweet spooling turbo on a 2.5 and Cobb even has maps you can download to run an 18G on your stock 06 injectors if you have an Accessport. I know 22s are cheap but turbos the one part I dont cheap out on, if your going for a turbo upgrade its the one thing you should be putting your pennies toward, find somewhere else to save a few bucks, its like building a stereo sytem to run radioshack speakers