How can i choose the right turbo.
 

I have been browsing threads on turbo flow maps and trying to figure out how to choose the right turbo for my car to match my fuel system. I am not looking to upgrade my fuel system as i am happy with what i got. Thanks

550/1300
FPR
stock port motor
PFC
W/I
RP fuel pump
front mount Intercooler
ect..

You probably wouldn't want to go much bigger than a 35R/BW S362/ 60-1 with that fuel setup. I'm not sure it will allow more than 400-450 whp, and either way, make sure you keep a good eye on your duty cycles, different setups will want different amounts of fuel. Is that stock FPR?

Its a SX fuel regulator. I would be happy making 380 to 400 HP. I dont feel the need to want more than that. I like to drive the FD often.
I was thinking turbonetics 60-1 or a 62-1..... I though that the GT35R was a bit too big for 550/1300.

62-1 is bigger than a Gt35R. Gt35R is 61mm. Any of those turbos past 14psi will probably max the injectors out.

What turbo would you suggest?? and is 380HP possible with 550/1300?

from my thread entitled, "Feeding the turbo'd rotary: Horsepower, Airflow, Fuels.

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/feeding-turbo-rotary-horsepower-airflow-fuels-881992/

“If I run my 550s as primaries what do I need as secondaries with my GT35?”
4348 - 1100 = 3248 CC/Min needed in addition to 550 primaries
Run a couple of 1600s and you are fine!

your 1300s add up to 2600 which is short of the 3248 required.

given your hp goal: 380 to 400... say 400 means you should be looking for a turbo that makes 53 pounds of air tops.

consider

GT3776 makes 48 pounds at 22 psi and 47 at 14.7 compressor is 5.374 sq inches
GT3076r makes 52 at 26 psi and 48 at 14.7 compressor is 5.511 sq inches
TO4E 60 trim makes 50 at 19 psi and 45 at 14.7 compressor is 5.476 sq inches


everything larger makes 60+ pounds which is too much given your injector size and hp goal.

hc

Yes, but don't be afraid to run a larger turbo just because you don't have the injector for it. That is why wastegates were created, and none of the turbos listed will be too "big" as far as spool-up is concerned. I don't have any experience with the FD twins, but it almost sounds as if you'd be better off sticking with them, as far as cost vs. power goal.

Here's an idea...... change your secondaries out to something bigger. Side feed secondaries are for sissies, that'll be my campaign slogan in H2 2010 :D

I just want to keep it simple, Any where between 350 - 400HP turn key and go type of sh*t.

60-1/t04s.

what about bnr twins?

https://www.rx7club.com/3rd-generation-rx-7-1993-2002-parts-99/went-single-knight-sports-rf420-twins-902860/

"62-1 is bigger than a Gt35R. Gt35R is 61mm."

nope....



62-1

62 mm X 76.2 5.87 sq inches

GT35

61.4 mm X 82 6.386 sq inches

the 62-1 flows 63 at 19 psi and would be too big for your injectors.

hc

Sorry Howard, but a 62-1 will not make ~450whp+ on a rotary at only 10psi. I was just looking at a sheet for a 13B-RE with secondary bridges that made ~420whp @ 14psi, a stockport motor would not even reproduce those figures.

Just because a turbo can pump the air, does not mean that an engine can make use of it. Throw a GTX4508R on a 13B and it won't necessarily make over 750whp @ 1 bar...

Also, just because a 35R is ~8.8% larger according to your reference system does not make it flow more. Inducer size is the most common source of reference for power capability, excluding improvements in aerodynamics. That is why most (all?) sanctioning racing bodies limit inducer size on turbos for certain classes.

I want to get rid of the twins. The heat that comes out of them things are ridiculous,with the single turbo i can blanket most of the hot side and manifold.


Would a divided hot side increase better response?

Sorry Howard, but a 62-1 will not make ~450whp+ on a rotary at only 10psi. I was just looking at a sheet for a 13B-RE with secondary bridges that made ~420whp @ 14psi, a stockport motor would not even reproduce those figures.///////////////// my error, that was a typo. i meant 19 psi. i will edit the post////////////////

Just because a turbo can pump the air, does not mean that an engine can make use of it. Throw a GTX4508R on a 13B and it won't necessarily make over 750whp @ 1 bar...//////////////agree/////////////////

Also, just because a 35R is ~8.8% larger according to your reference system does not make it flow more. Inducer size is the most common source of reference for power capability, excluding improvements in aerodynamics. That is why most (all?) sanctioning racing bodies limit inducer size on turbos for certain classes./////////////there is a clear correlation between area and output. it is not linear and i totally agree that trim is a major factor but primarily defining where the turbo is efficient within the map////////////

hc

I dunno...maybe you can find something useful here:
http://www.reganrotaryracing.com/fel...oselection.htm

I run a GT35R on a streetported motor. Very tractable, not peaky, street friendly.

Not if you run 850 primaries. ;)

And I'm not a sissy, I'm not, I'm not, I'm not... *stamps foot*

Regards,
Crispy

Nah, that website Chris quoted sucks, completely worthless. Don't bother :D :lol:

On a serious note, not a fan of 850cc side feed primaries. I had them for many many years and the idle and cruise AFRs killed me. 12s at idle? No thanks. Now I'm no tuner, but many 'supposedly' accomplished tuners had their hands on my car with the 850/1300 combo and the AFRs were always nasty rich.

Now with 870/1680 top feed plus FJO injector driver (no evil resistors), much much better. AFRs where I want them and a car that drives smoooooth :nod::icon_tup:

While we are on the subject of idle. When my car idles my wide band gauge says 8.6 when i make a pull (which i shouldn't be doing that) it goes up to like 12.4 of some sh*t like that. the lower the number is the richer it is?

What about the Apexi RX6? If my HP goals were in the 350-390 rwhp range, I would be all over this turbo.

8.6 is ridiculously rich at idle... not sure that the car would idle too well. If the car is idling fine I would suspect the gauge/sensor at that point.

Obviously not side-feed, but the ID1000's can get a nice idle at 13.5:1, but they're comparable to a standard 880cc injector as far as flow. Amazing injectors...

After some searching i realize that the 550/1300 just isn't going to cut it. I might just copy cat GoodfellaFD3S fuel setup.
I am leaning heavy toward the 62-1. The one thing i don't understand is why the 60-1 has a bigger A/R than the 62-1 being that the 62-1 is a bigger turbo?

62-1 A/R.63
60-1 A/R .96

You should be able to get a the 62-1 is a lot of turbine a/rs from .63 to 1.32..

I am not sure what you mean. If i understood correctly i can basically get a 62-1 in various A/R sizes. If so what A/R is adequate for a stock port 13rew?