Largest Turbo in Stock Location

[dragonballspeed]

What is the largest turbo you can put in the stock location using either a stock manifold, steedspeed, or etc? I know a lot of you guys have used the GT28 series with no problem, Garrett just recently put out the GT3071R w smaller packaging & T25 flange, but I'm looking for something a little more specific. Has anyone tried and been successful using a GT2876R (aka 2540R)? I realize it might not be the highest flowing turbo with T25 flange, but I want a turbine housing that utilizes the 4" anti-surge inlet. Any thoughts???

Just curious, what is the exhaust flange size for the Mazdaspeed 3 & 6?

Thanks for the feedback.

[Speed3.5]

dude , w/ that turbo you'll only be boosting after 5k rpm's but to ans. your Q - you could fit it if you take off the power steering which is the piece that won't let you put a bigger custom made down pipe.

just curious , 4" intake side isn't efficient since theres no room to put it there unless you flip the radiator on the other side of radiator supporter side.

you could explain your goal, maybe you'll get better help that way or even better sugg./ideas
The only way to do that is to get t3 flange and mount the turbo parallel to the engine bay.

[dragonballspeed]

dude , w/ that turbo you'll only be boosting after 5k rpm's but to ans. your Q - you could fit it if you take off the power steering which is the piece that won't let you put a bigger custom made down pipe.

just curious , 4" intake side isn't efficient since theres no room to put it there unless you flip the radiator on the other side of radiator supporter side.

you could explain your goal, maybe you'll get better help that way or even better sugg./ideas
The only way to do that is to get t3 flange and mount the turbo parallel to the engine bay.


Well as far as custom work goes, that's no big deal. Just about everything in the front of the car has been changed or modified with the exception of the turbo and manifold. Basically I'm looking at options that make it easier to use one of the readily available manifolds on the market. I just don't have the time to let my car sit in a shop for a couple of weeks while someone builds a manifold.

And as far as a later spool-up, no big deal since we really have no traction under 4-5K rpm anyway. Plus with a properly built motor, there is no reason why it can't spin up to 9K or so. When you take that in to account you get longer gears and more top end speed. I'm not building a dyno queen, just a fun high-speed runner.

[Kooldino]

Spinning to 9K and making power to 9K are two different things altogether.

[Mazdaspeed2oo35]

What is the largest turbo you can put in the stock location using either a stock manifold, steedspeed, or etc? I know a lot of you guys have used the GT28 series with no problem, Garrett just recently put out the GT3071R w smaller packaging & T25 flange, but I'm looking for something a little more specific. Has anyone tried and been successful using a GT2876R (aka 2540R)? I realize it might not be the highest flowing turbo with T25 flange, but I want a turbine housing that utilizes the 4" anti-surge inlet. Any thoughts???

Just curious, what is the exhaust flange size for the Mazdaspeed 3 & 6?

Thanks for the feedback.


Hope these info is helpfull for you. Im Actually Running Hiboost Big Boost Manifold with a Garrett GT3582R Turbo on stock location, no fitment issues. direct bolt on. here are some shots of what i have, also you can check my car domain website for more details.

http://www.msprotege.com/members/Mazdaspeed2oo35/Hiboost%20Manifold.jpghttp://www.msprotege.com/members/Mazdaspeed2oo35/Hiboost%20Manifold%202.jpg

http://www.msprotege.com/members/Mazdaspeed2oo35/GT3582R%20Turbo.jpghttp://www.msprotege.com/members/Mazdaspeed2oo35/Garrett%20GT3582R%20Turbo%202.jpg

http://www.msprotege.com/members/Mazdaspeed2oo35/Hiboost%20Downpipe.jpghttp://www.msprotege.com/members/Mazdaspeed2oo35/Hiboost%20Downpipe%202.jpg

http://www.msprotege.com/members/Mazdaspeed2oo35/Turbo%20Installed.jpghttp://www.msprotege.com/members/Mazdaspeed2oo35/Turbo%20Installed%202.jpg

Everything Finished.

http://www.msprotege.com/members/Mazdaspeed2oo35/Turbo%20Installed%203.jpghttp://www.msprotege.com/members/Mazdaspeed2oo35/Turbo%20Installed%204.jpg

http://www.msprotege.com/members/Mazdaspeed2oo35/Turbo%20Installed%205.jpghttp://www.msprotege.com/members/Mazdaspeed2oo35/Turbo%20Installed%206.jpg

[SPEED3TYPE2]

nice man!!

[2.0t03speed]

thats not in the stock location your gt35 is running paralell with the block. and to the op you cant run the new 3071 biggest turbo you can run in the stock location is the 2871r. UNLESS you go and buy jdm sams new turbo that hes just came out with. its a 3071r that willl fit in the stock location. t2 exhaust side with the gt5 bolt discharge so it will bolt up to everything. but the compressor housing is a custom one that jdm has made from garrett that allows you to make it fit in the stock location. because the normal 3071 compressor housing is too big

[NEBoosted]

mmm big turbo!

[2.0t03speed]

and no miguel one more thing yours in not a direct bolt on. yours has a t3 flange with the t3 5 bolt discharge. the t3 and t2 5 bolt discharge flanges are totally different. also you had a custom down pipe made for the turbos new posistion and different discharge flange. also you had to clock your housing down becuase it would hit the fans clocked upward like the stock msp turbo. not attacking you just staing that your turbo is not a direct drop in

[Mazdaspeed2oo35]

and no miguel one more thing yours in not a direct bolt on. yours has a t3 flange with the t3 5 bolt discharge. the t3 and t2 5 bolt discharge flanges are totally different. also you had a custom down pipe made for the turbos new posistion and different discharge flange. also you had to clock your housing down becuase it would hit the fans clocked upward like the stock msp turbo. not attacking you just staing that your turbo is not a direct drop in

you are right, i got the whole thing the wrong way, what i understood was what is the biggest turbo you can put. i thought since the Hiboost manifold is direct bolt on with these turbo to these engine. yeah these is about stock pipes position, stock turbo location weather aftermarket turbo manifold such as thunder, steedspeed etc. sorry men, i got these whole thing the wrong way. yes the biggest turbo you can actually put without modifying anything is the GT2871R if not mistaken.... thanks for the correction Ryan !! no hard feelings !!!

[2.0t03speed]

actually the biggest turbo that your can fit in the stock location now is jdm sams new 3071 with the custom compressor housing =).

[Mazdaspeed2oo35]

actually the biggest turbo that your can fit in the stock location now is jdm sams new 3071 with the custom compressor housing =).

Damn.. JDM SAM is turning out to me the MAN here modifying the MSP´s... I'm very impress with all of the stuff he have done and still making, thank god we have him here in the forums and as a nice hi performance parts vendor !!!

[Mazdaspeed2oo35]

actually the biggest turbo that your can fit in the stock location now is jdm sams new 3071 with the custom compressor housing =).

but is highly recommended to get a better turbo manifold since the Stock Callaway Cracks easy, is there any good manifolds out there for these cars ? except Hiboost ?

[2.0t03speed]

the new rpm mani looks good. theres the steedspeed's and thunders. theres also the old mam,spool,and wagner kits thats if u can find them

[mikeski]

i love to see big tubos! when i look under the hood at the stocker.......it looks like a weenie! :/ hahaaha

[2.0t03speed]

thats because it is lol

[dragonballspeed]

Well I actually know JDM Sam & the new turbo that he has displayed on his website, but I believe that there is actually a little misconception here. The new GT3071WG w/T25 flange I believe was developed by Garrett (probably because of multiple request due to packaging constraints), but you can also buy the same turbo from ATP Turbo as well as a GT3076WG with T25 flange. However as much as we'd like to think JDM Sam has the proprietary rights on this, I don't beleive that is the case b/c I can find multiple examples of this turbo.

Maybe we're getting little off track here. I'm not worried about radiator clearance, b/c that can be adjusted but what about block clearance. Is it a small amount that hits the block and could be fixed with a little clearancing, or does the manifold need to move forward say a 1/2" or so?

[2.0t03speed]

your not understanding what im saying. i know garret has come out with the 3071 in a t2 flange im not saying that jdm sam had anythign to do with that. the turbo that jdm sam has listed on his website if different then one you would get from garrett with the t2 flange. the normal 3071 with the t2 flange will not fit in the stock location becuase the compressor housing is too big it hits the radiator. the turbo that jdm sam listed has his own specs with a custom compressor housing straight from garret so it can fit in the stock location atp does not have that turbo

[2.0t03speed]

why are you worried about block clearance when the compressor housing is angled away from the block and twords the radiator?

[2.0t03speed]

o and also tell me how you would adjust radiator clearance? the 2871's compressor housing is very close to the radiator it almost touch's it

[dragonballspeed]

o and also tell me how you would adjust radiator clearance? the 2871's compressor housing is very close to the radiator it almost touch's it


I'm not worried about block clearance, just asking b/c I had heard that was one of the issues with larger turbos.

As far as adjusting the radiator clearance, I won't give that up. BUT anyone with a little time and fabrication skills should be able to figure that out. All I will say is rearranging the parts in the radiator & core supports can give you up to 2" more inches to work with.

If you want more info I will be glad to discuss that with you through PM's. One day when it all comes together I'll post pics of everything I've done, but as an FYI I have very few parts that are bolt on.

[2.0t03speed]

http://www.mazdas247.com/forum/attachment.php?attachmentid=38542

there you go thats a picture of the 2871r on fast lanes car and you can see the compressor housing is almost touching the pwr rad proabbly have about 1-2 inches. and the only issue with block clearance with larger turbos is the wastegate.

[dragonballspeed]

Thanks for the pic. It that the 2871 with regular compressor housing or the modified unit?

[magnumP5]

http://www.mazdas247.com/forum/attachment.php?attachmentid=38542

there you go thats a picture of the 2871r on fast lanes car and you can see the compressor housing is almost touching the pwr rad proabbly have about 1-2 inches. and the only issue with block clearance with larger turbos is the wastegate.
pfft! 1 - 2 inches is a TON of space, LOL! Not to mention look at the size of those monster fans he's running. Even with the 2871 and the monster-thick CS Radiator everything should fit it you use some slim fans like SPALs or something. I really would like to run Sam's turbo one of these days. Who needs 16 psi when I can be making damn near 300 whp at 12 psi!

[2.0t03speed]

no thats the normal 2871. there is no custom compressor housin to make it fit. thats the largest turbo that will fit in the stock location except sams new 3071 custom unit with the custom compressor housing

[2.0t03speed]

pfft! 1 - 2 inches is a TON of space, LOL! Not to mention look at the size of those monster fans he's running. Even with the 2871 and the monster-thick CS Radiator everything should fit it you use some slim fans like SPALs or something. I really would like to run Sam's turbo one of these days. Who needs 16 psi when I can be making damn near 300 whp at 12 psi!

ok we allready know the 2871 fits thats not what we are debating i posted that picture as refrence ot show how much space you have with that turbo and why you cant go bigger then the 2871 in the stock location

[2.0t03speed]

also sam has posted pictures of the custom 3071 there is a thread on it

[yellowmsp035]

just buy my kit... comes with a T3/T4 (comparable to gt30r) and its all bolt on :) and the turbo sits parellel to the block so you can upgrade the turbo even more if you wanted too

[2.0t03speed]

btw are you running the obx manifold with the circular ports lol?

[yellowmsp035]

i was haha

[dragonballspeed]

Thanks, but it is just too busy under that hood.