I was told to go with precision but wanted to hear from some guys with experience what the best way to go is with new turbos that have came out and everything. Goals are 900-1000hp and I'm not into the high rev high range boost I look it more low or mid atleast. Right now have a dbb hta 3786 with all the supporting mods I need to make 900 including drive train. Putting new fuel lines in soon but thatshe easy. So, best lower range turbo? Thanks in advance just want the best one out there

 

9174? You'd be pushing it.

 

9174? What do you mean

 

you want low and midrange with 900hp? thats not going to happen, the best you can do is build a 2.1/2.2 liter long rod motor, higher displacement than that will limit your revs, to keep a big turbo like that happy you need to rev to the moon.. but basics for faster spool are:
1.higher compression
2.bigger displacement
3.twin scroll turbine outlet and manifold

 

Garrett GTX4594R. Compressor flows about 98 lbs/min. You want the GT45 size turbine (87mm inducer diameter) paired with the 94mm compressor instead of the GT42 (82mm inducer diameter) as the GT45 gives a better blade speed ratio for better turbine efficiency.

The Borg Warner EFR 9174 compressor wheel will flow 95lbs/min. but the turbine is sized pretty small (74mm inducer diameter) which is going to result in a poor blade speed ratio and lower turbine efficiency.

Another option, though a bit oversized, is a BW S400SX 74mm Turbo S374.

 

Right now

 

Right now I have the garret hta 3786 with a 2.4L stroker by English racing. It starts boosting at 3k. I didn't mean low I meant lowest to correct myself lol. I have a magnus v5 intake mani

 

A 9174 is an EFR turbo. I suggested it because its the fastest spooling turbo for 900whp, but like i said, you'd be pushing it to get there. It will not crack your 1000whp goal. Your 2.4 will certainly help for the mid-range, but its a 94lb turbo (compared to your ~75lb 3786) so its going to be really laggy regardless. Get the 1.45 a/r.

9180 on a 2.4L: https://www.evolutionm.net/forums/ev...l#post11371706

9174 on a 2.0L: https://www.evolutionm.net/forums/ev...l#post11588812

 

Two turbos that will definitely get the job done.

1. Precision 6870. This has already done it numerous times on numerous cars.

2. Borgwarner S369SXE. This is also know as the Borg 9180. It has the compressor and turbine to get the job done. Compressor maps show it to be a 98-99lb-per-minute turbo. Note, it is different that the Borg EFR series turbo. In fact, this particular compressor which is 69mmX91mm isn't even available at this point in the EFR series.

 

I really appreciate you helping me out I'm going to do a little homework on these, youd say these are the nest for street or course use? I may race straight here and there but even then, I'm sure theveryone lower range turbos will still get the job done

 

These turbos will make 900hp. They will not be the fastest spooling turbo you can put on your car. They will not work well on a road course. They are for drag racing, street racing, and making big power numbers.

 

BTW, based on what you wrote in the highlighted area, you don't need a 900hp turbo. They don't make the best low/mid power, especially on the street. They spool slow. But they make big power.

My advice, stick with the turbo you already have. It will make lots of power.

 

Frankly, all turbos mentioned thus are 'too laggy' for anything other than drag racing and roll racing on the highway. Unless you want to stay at above 5000RPM 100% of the time (you dont, trust me).

That said, the following time attack evos run a 9180 + 2.3 or 2.4 motor at ~900whp: Tilton Interiors & Nemo Racing. They dont use Garrets or PTE because they spool too slow for 900whp. Some are switching to the 9174, which flows the same, spools somewhat faster, and has a higher max turbine speed (this means its safer to beat the **** out of it at 40+PSI).

Road course use, a much "smaller" turbo makes more sense, like ~70lb or less. Seriously, youre trying to build something thats completely useless in every environment except drag and dyno queen bragging. If you wanted to road course or hpde with 900whp, you have to be a professional driver ontop of the following: ultra wide 300+ series tires, frame mounted aero everywhere, and insane spring rates. Otherwise you will die or your lap times will be horrible at minimum. Shoot for something with a more useful (broad) and controllable powerband like ~500whp.

 

Makes sense. That's why I have the 2.4 in the first place. I just figured it would be nice to have more power but then again if I wanted a drag car I'd drive something else. I've been told 6262 I believe. It would be acceptable to me to have a 800hp more reliable and more controllable car but with acceptable spooling considering the 3786.. because it does spool well. Maybe I'll stick with my setup although just food for thought, are there any other turbos you would run to replace the 3786 and make just a little more power, spool faster or just have an all around better turbo... I could always sell mine because I plan to go FF and sell some stuff anyway

 

^ Incorrect. Tilton and Nemo use 63 based 2.2L (both Cosworth). PMQ Evo (Pro Am winner) also uses 63 2.2L (Nitto). In fact its hard to think of any WTA Evo's that haven't used a 2.2L (Sierra Sierra, Cyber Evo included)

Tilton is now retired and For Sale so doubtful they would change turbo. Same goes for team Nemo, nobody has heard from them in 2+ years