gt3076r runing as of 9-28-07

[funkyman]

Expert opinion needed before its too late.

you are right! the thing with me was that i could not drive with my stock turbo any longer! the result of keep driving with the stock turbo will be that angry people will kill me cuz of the smoke/ smell!

To Mike,Haltech,CPE engineering and all experts just a small suggestion or an idea deriving from BMW and former icons 300zx,3000gt,Supra and last ,but not least BMW 335i

Now in order to create an equal or yet a better turbo spool up,less lag or throttle response time etc than the stock Hitachi set up ,wouldn`t it be a better idea to go with a twin turbo set up,surely it would be would be far more effecient,using 2x GT2560R - 707160 - 9 Ball bearing turbos that are not only lighter but due to their size and weight may perform better when married to the 4 cylinders.If tuned correctly each turbo is capable of 330hp each@crank more than enough for our Mazdas,since we will have 2 of them.
Or another option would be the GT28 Family > GT2871R - 771847 - 1
WHich is a ball bearing and it is good for 460hp which again is pretty impossible to reach and more than enough anyway for our cars and this turbo has amazing boost response properties that would exceed that of the Hitachi.We really don`t need a GT30 do we?.I thought the idea was to develop a doable,reliable optimal,everyday driving turbo kit rather than over doing things.We need a kit for everyday driving and not blow any engine internals don`t we?Any ideas or oppinions.?

GT2871R - 771847 - 1
Ball bearing *Oil & Water-cooled bearing system *Direct replacement upgrade turbocharger for 466541-1, & 4 used on Nissan SR20DET engine *Upgrade turbocharger for GT28RS (739548-1); turbine stage outline interchangeable*Provides better boost response than the 743347-1 & -2 turbochargers*T25 turbine inlet flange*Ideal for smaller displacement engines with packaging constraints*Ideal for smaller displacement engines making up to 460 hp*Turbine housing option available

GT25 Family > GT2560R - 707160 - 9

Ball bearing *Oil & Water-cooled bearing system *T25 turbine inlet flange with threaded bolt holes instead of traditional through holes *Standard T25 oil drain flange*Turbine housing has a unique "compact" 5-bolt outlet that is not interchangeable with traditional T25 5-bolt outlets *Turbine housing is cast from high-nickel "Ni-Resist" material for extreme applications*Turbine wheel is cast from "Inconel" material for extreme applications*Direct replacement upgrade turbocharger for GT2556R (702987-7) on Nissan RB26DETT used in Skyline R34 GT-R*Great size for applications w/ packaging constraints*Ideal for smaller displacement engines making up to 330 hp *Actuator not included

 

[Igve2shtz]

To Mike,Haltech,CPE engineering and all experts just a small suggestion or an idea deriving from BMW and former icons 300zx,3000gt,Supra and last ,but not least BMW 335i

Now in order to create an equal or yet a better turbo spool up,less lag or throttle response time etc than the stock Hitachi set up ,wouldn`t it be a better idea to go with a twin turbo set up,surely it would be would be far more effecient,using 2x GT2560R - 707160 - 9 Ball bearing turbos that are not only lighter but due to their size and weight may perform better when married to the 4 cylinders.If tuned correctly each turbo is capable of 330hp each@crank more than enough for our Mazdas,since we will have 2 of them.
Or another option would be the GT28 Family > GT2871R - 771847 - 1
WHich is a ball bearing and it is good for 460hp which again is pretty impossible to reach and more than enough anyway for our cars and this turbo has amazing boost response properties that would exceed that of the Hitachi.We really don`t need a GT30 do we?.I thought the idea was to develop a doable,reliable optimal,everyday driving turbo kit rather than over doing things.We need a kit for everyday driving and not blow any engine internals don`t we?Any ideas or oppinions.?

Although it worked well with STOCK supras, 300zx's and whatnot, the dual turbo (or the sequential turbo in some of the cases) has one key design flaw: SPACE. The engine bay of the MS6 is too cramped to put in 2 turbos, and not to mention the complex bending of the piping necessary to facillitate this change. Also, heat becomes more of an issue, and more back pressure is built up. And let us not talk about the price of all this.

Also, these engines were all designed mid 80's. Turbocharger technology has increased by lightyears since then to reduce the lag. Variable vanes and ball bearings are mostly to congratulate, but also lighter, stronger alloys and computational fluid dynamic modeling. Engine technology has also increased, and in the MZR case, offers higher compression due to direct injection, as well as variable valve timing, all of which increase off-boost torque and performance.

Just ask any Supra fanatic - a big single turbo works better than two turbos.

The best turbo for the MZR, single turbo would be a GT28RS straight out of the factory. That would be good for 300 whp, good boost response. For all out performance, a bigger GT3076 or GT35 would work amazing once the throttle plate issue is solved and the entire RPM band could be used.

As Carroll Shelby once stated, "if you have lag, you ain't driving it right".

Getting back on topic: MS6mike, dont listen to the haters. I say check your car for any boost leaks and whatnot. Get it tuned, and then hold on for a wild ride!

 

[funkyman]

I would opt for the GT28 Family > GT2871R - 771847 - 1 since smaller turbos spool faster than big ones and im sure its good for 300-350@ wheels which is plenty of un upgrade to the stock.If we can have an increase of 80-100hp at the wheels that is an amazing performance increase and any higher on this engine would not be tolerable or driveable as far as the longevity of the stock internals are concerned.Anything above 300hp@crank couldn`t be too healthy for the engine internals of the 2.3lt MS3Especially when a car like 335i have limited theirs at 300hp at crank with a 3.0 liter massive inline 6cyl.

 

[forrestang]

Wow, I haven't been on this board in a minute, but the dude posts about his modding experience and gets slammed......LOL

I would love to see others try things before me and tell me what they liked/didn't like about it.

 

[chriscecc914]

big single turbos are good for racing. what do you need a fast spooling turbo for? Yea its fun to drive on the street but in any race you are never under the powerband and if you happen to be below 4000 rpms (full boost on the 3076) in a roll race all you need to do is downshift.

I dont understand wy the throttle plate snaps shut with a bigger turbo. Why wouldnt it snap shut with the stock turbo which pushes more boost then what ms6mike is pushing?

 

[MS6mike]

well, i got my new piping for the FMIC redone! now all the pipes fit perfect!
will check for boost leaks today!
will post pics of the new IC piping later!

thanx for the feed back!

 

[Igve2shtz]

I dont understand wy the throttle plate snaps shut with a bigger turbo. Why wouldnt it snap shut with the stock turbo which pushes more boost then what ms6mike is pushing?

Unfortunatly, the ECU is probably programed to close the throttle given certain RPM conditions, and maybe certain throttle voltages to prevent overspeeding of the stock turbo, prolonging life, and less warranty work to save Mazda money.

Also unfortunately, when swapping to a bigger turbo, there is no reprogramming of the ECU to allow it to know that the new turbo is capable of higher speeds. So, the ECU is doing exactly what it was told for Stock conditions and is just oblivious to the new additions.

So until someone is able to reprogram the throttle motor, the ECU will continue doing what it was designed to do.

 

[Captain KRM P5]

So until someone is able to reprogram the throttle motor, the ECU will continue doing what it was designed to do.

or someone could come up with a cable actuated throttle and disregard the factory crap altogether

 

[MS6mike]

or someone could come up with a cable actuated throttle and disregard the factory crap altogether

i was thinking doing that while i wait for a solution! just got to see what shop will do this!

 

[chriscecc914]

so is this throttle problem a problem for the 3071 guys?

 

[Captain KRM P5]

the throttle plate closing up is a problem on all mazdaspeed3s and mazdaspeed6s. it doesn't close up all the way, the computer just starts to close it incrementally as you pass 5500rpms or so.

 

[MS6mike]

the throttle plate closing up is a problem on all mazdaspeed3s and mazdaspeed6s. it doesn't close up all the way, the computer just starts to close it incrementally as you pass 5500rpms or so.

llok at my graph, my throttle is closing before the 5,500 rpm! thats the prob! (bicker)

 

[MS6mike]

well i might be able to get a tune tomorrow! my friend whit his 450whp evo is going to get a tune, i am going tomorrow! I jusy hope he can tune my car as well!

 

[aTriz]

The Red Evo? I talked to him tonight at 27... hopefully they can learn how to use cp-e's program and help you put down some sick numbers!! GL

 

[dadasracecar]

Removal of the VTCS flaps mitigates the throttle closure at high RPM. It's all SOTP right now but it is significant. A dyno measurement will tell if there is any increase in the HP/tq but the shape of the curve should definitely be different if my butt dyno is anywhere near accurate.

 

[zoom shoes]

good luck on tune today... TTP has some nice evos, hopefully they can work their magic on the mazda!

let us know what happened

 

[MS6mike]

well i am here now! they are going to tune me last! after the EVOS!!!! DAMMIT! o well i have been since 12 pm! its 7 pm not evn a run on the dyno!!!!

 

[mrlilguy157]

(drinks)wow.

keep us updated.

 

[chriscecc914]

come on mike! i been waitin up late to see some results lol your gonna make me wait till morning huh?

 

[MS6mike]

o well came from the dyno! 311hp 329 tq on 17 psi SAFE!!!! this is now my base map! had to use a MBC to control boost! stayed there till 12:30 am ! coming home my intercooler pipe came loose! so i was scared LOL its all fixed! cant wait till do the agressive tune! runing a 12ish AFR! but listen to this! my first run was 282hp 283 tq we were all this time findig how could i get power till redline witch i have now! so i am happy with the results! next week ill have my second map witch will be th all out power!