http://www.turboneticsinc.com/comp_maps/fig1.html

http://www.vfaq.com/mods/Turbo-compressor-maps.html

Here is a link to the compressor maps, and one to an article I wrote on reading the maps.

Spool up time is really determined by the exhuast side, but the compressor side will have some effect on it. Larger wheel, slightly higher spool up time. for a .63 stage III wheel the 50 trim would be a good choice. The TO4e 50 trim wheel is very efficient and has a pretty wide working range, it's relatively efficient up to 480-490HP (you can make more but the eff. drops off). and it can do that at pretty high boost levels. Just last night we made 452hp to the wheels on a 2G with only bolt ons (stock motor/intake/TB) with our T3/T4 turbo kit - this was with a TO4E/T3 with a 60 trim comp. and a .63 Stage V exh. side. We where tuning the new AEM EMS on our dyno and in 5 pulls we reached this number at only 21psi of boost, it made 420whp at 18 and 306whp at 9psi! We could have made easily over 500wheel hp but with a stock 2G motor we didn't want to push the envolope and leave motor parts on our dyno.
BTW a 50/.63 stage III turbo will make 20-25psi in 3rd gear at around 3400-3700rpm, depending on cam choice and other mods.

Martin
AMS - www.automotosports.com

 

Turbonectics t3/t4 hybrid

I was wondering if anyone has experience with turbonectics ball bearing t3/t4 turbos, and if so, what specs they run. Im trying to decide on parts for my project, and basically im looking for 400 - 450 hp on a built motor and trans [probably a comp ratio of 8.8 - 9.0] while not having to wait a year and a day to spool [preferably around 3000 - 3500 rpm]

I pretty much would like to stick with a turbonectics ball bearing unit from what ive heard about them, if anyone has any suggestions on a different unit, or a better company, i would appreciate it.

 

400-450 on a built motor,
go with the TO4e 50/stage III .63
I'm a Turbonetics and Innovative Turbo WD, and I don't recommend the Turbonetics single ball bearing option to street users. It really does very little for spool up, it does allow the turbo to handle more thrust load, so basically if you are racing the car and running 25+psi of boost constantly then it might be a good option. The new true ball bearing center cartridges from ITS look very promising, I have a few here and you can just pick up the turbo and twist the turbo to get the wheel spinning freely.

Martin

 

uhh... i posted and it came up as Reges92tsi...weird...
anyways that last post was from me..

 

http://www.turboneticsinc.com/comp_maps/fig1.html

http://www.vfaq.com/mods/Turbo-compressor-maps.html

Here is a link to the compressor maps, and one to an article I wrote on reading the maps.

Spool up time is really determined by the exhuast side, but the compressor side will have some effect on it. Larger wheel, slightly higher spool up time. for a .63 stage III wheel the 50 trim would be a good choice. The TO4e 50 trim wheel is very efficient and has a pretty wide working range, it's relatively efficient up to 480-490HP (you can make more but the eff. drops off). and it can do that at pretty high boost levels. Just last night we made 452hp to the wheels on a 2G with only bolt ons (stock motor/intake/TB) with our T3/T4 turbo kit - this was with a TO4E/T3 with a 60 trim comp. and a .63 Stage V exh. side. We where tuning the new AEM EMS on our dyno and in 5 pulls we reached this number at only 21psi of boost, it made 420whp at 18 and 306whp at 9psi! We could have made easily over 500wheel hp but with a stock 2G motor we didn't want to push the envolope and leave motor parts on our dyno.
BTW a 50/.63 stage III turbo will make 20-25psi in 3rd gear at around 3400-3700rpm, depending on cam choice and other mods.

Martin
AMS - www.automotosports.com

these numbers on race gas or what?

 

Thanks for the response AMS. I assume that from your response, i can draw this conclusion;

A 50 trim will make less power overall than a 60 trim wheel, but the 50 trim will help the turbine to spool quicker than the 60 trim.


However, the turbine wheel mainly dictactes how quickly boost comes on. Is it true that a stage 2 wheel spools quicker than a stage 5, but develops a lot less power?

Are you able to put side by side, what stage turbine wheel works best with what trim of compressor wheel? for example do the folLowing matches work best?

T3 stage 2 wheel <-> T4 40 trim wheel
T3 stage 3 wheel <-> T4 50 trim wheel
T3 stage 4 wheel <-> T4 57 trim wheel
T3 stage 5 wheel <-> T4 60 trim wheel

 

i am also curios as to the compressor wheel to turbine "stage" size..like what justin was asking. for instance ill be goin to a t3/t4 setup in spring...most likely a 50 trim 63 a/r....but should i go with a stage III or IV wheel? i know a larger turbine wheel will give me more lag..but realy i do not mind lag at all...since im trading it for big top end power. so would a To4e 50 trim .63 a/r stage IV work well toghether?? id like to have enuff turbo to make around 420 WHP on race gas at like 25lb boost efficiently. thx in advance--

 

what are your ultimate goals?

 

Justin, unfortunately it's not quite that easy. The one thing that you may not be considering is the third variable in the whole turbo selection process, the turbine housing size. We tend to pick compressor wheel -vs- turbine wheel based on your specific setup and goals rather than comparing their sizes to each other.

-kris-
AMS

 

my ultimate goals are mid to low 11's at the track and mid 12's on 93 octane for the street. but since i will probably barely ever run at the track id really like a turbo that makes the most effiencient power at around 19-20 psi. ive heard a 50trim-.63ar-stageIII is best for the street but id like to have a little more turbo than that?

 

Talk about raising a post from the dead.

I ended up purchasing the T3/T4 .63ar Stage 3 50 trim from Nathan at http://www.diamondstarmotorsport.com It's currently being installed by my mechanic. I'll have a parts review soon. I have this installed in my fwd application which is very similar to a 2G FWD.

 

so whats the difference between a T3/T4 garret turbo? and a turbonetics T3/T4?