TO4B V1/V2 vs. BNR Stage 2
 

I currently have a BNR Stage 2 Hybrid on street ported, fmic, Microtech S5 TII. How does a full TO4B V1/V2 compare to that turbo? I would assume it will spool faster. I don't know the exact trim or any sizes but worse case scenario (smallest trim available or biggest) how much power will the TO4B put down. I made 328rwhp @15lbs with the hybrid and want to remain close to that range. I can't read maps to save my life. Thanks.

to4bs are too small. I had an H3 and i ran it out of breath/ efficiency and the shaft broke. if all you plan to run is 15 lbs get a 60-1 or a 62-1

60-1 is cheap and it works.

thanks guys. That's kinda what I thought. I was afraid it would be on the small side. Unless someone can say otherwise I'll pass on this turbo.

T04B 60-1 .96A/R .70 trim 4" inlet 3" out.

12.5psi 375rwhp. 15psi 408.8rwhp.

Nothing more above 15psi but more power below the rpm range.

I can't comment on the spool time since I have a problem spooling so I may have cooked the turbo or have a boost leak. Other then that I expected more power above 15psi as well.

Ian

uhhh a super-h t04b should easily surpass the 328rwhp he put down with the hybrid; while a true t04b v-trim should at least equal the same power.

If you want to familiarize yourself with different t04b compressor wheels and trim check out turbonetics site:

http://64.225.76.178/catalog/comp_wheels.html

I had always thought the BNR Stg2 uses the V-trim T04B wheel... This wheel should be good for a little over 350rwhp at 20psi on a nice streetport. The next step up is the T04B H-trim, which has a shorter but wider efficiency island up until 15-17psi. However, if you're gonna upgrade, might as well upgrade to the T04B 60-1 and trade a little in spoolup for more power.

maybe you just didnt bother to read what i said?

a to4b is too small for an rx7 in my opinion. im quite familiar with the maps AND the turbos thank you. a 60-1 would be a far better choice than a to4b.

.. this is what happens when you try to run 15 psi through a rotary with a to4b.. you over rev it.

http://countercultured.net/pics/cars...w/IMG_0006.JPG

I'll believe that when I see video of a dyno run.

Really. Coming from a guy who thinks a T04B and a 60-1 is two different turbos.

Go to the turbonetics web site. And yes I have dyno sheets. Yes I have video. Plus there was 15guys at the dyno that day. And yes it was tuned by Steve kan..

Do you want proof!

I know someone that made great power with a T04B housing milled out for a 62-1 compressor wheel. Worked like a champ and I believe made over 400rw on pump gas.

He thinks that cause to4B and 60-1 arent the same thing. You can get tons of compressor wheels in a T04B housing. More than likely you just had some small ass compressor wheel in yours.

If you want more information look here at how many wheels there are in T04B housings.....

http://www.turbofast.com.au/FlowTO4B.html

Ok. Maybe there is different turbos out there that are labled as T04B and a separate turbo as an 60-1
Ian

to4b is a cover, there are various different compressors that can be used.

this peashooter is an h3 to4b. it is a lower pressure/higher flow turbo than the v1/v2 this thread was started about.

if your turbo is using a 60-1 compressor and you have a 4" inlet and 2.5" outlet, that is not a to4b.


http://countercultured.net/pics/cars...b/IMG_2207.JPG

p.s. this is a map re: the to4b this thread was started asking about.

http://64.225.76.178/catalog/compmaps/Fig7.gif

this is the map of a 60-1 .. maybe you notice a slight difference?
http://64.225.76.178/catalog/compmaps/Fig9.gif

TURBONETICS makes a T04B 60-1 (part number 20177). The housing has a 4" inlet and a 2.5" discharge. (They also have a HiFi version with a 2.75"/2"). Comes with 60-1 compressor wheel, 2.324" inducer/ 3.000" exducer.

Its not a small turbo, the compressor housing is about 8" wide.

I was also present at the dyno when Steve Kan tuned Ian's car, and it made over 400 whp. Just plagued by lag problems.

TO4B STANDARD
SHAFT
S 20330 $112.00 1.904" 2.750" 20202 $121.00 2.750"
SUPER-S 20394 160.00 1.904" 3.000" 20202 121.00 2.750"
T5/6 20345 112.00 2.032" 2.750" 20346 123.00 2.750"
V 20325 112.00 2.180" 2.750" 20203 121.00 2.750"
SUPER-V 20364 150.00 2.180" 3.000" 20203 121.00 2.750"
H 20235 112.00 2.298" 2.750" 20192 112.00 2.750"
SUPER-H 20288 160.00 2.298" 3.000" 20192 160.00 2.750"
60-1 HI-FI 20230 160.00 2.324" 3.000" 20210 156.00 2.750"
60-1 20177 150.00 2.324" 3.000" 20190 357.00 4.000"
62-1 20255 235.00 2.441" 3.000" 20249 421.00 4.000"

[QUOTE=nyt]to4b is a cover, there are various different compressors that can be used.

this peashooter is an h3 to4b. it is a lower pressure/higher flow turbo than the v1/v2 this thread was started about.

if your turbo is using a 60-1 compressor and you have a 4" inlet and 2.5" outlet, that is not a to4b.



Well I'm not sure then. I'm basically a noob.

All I know is that my Turbonetics turbo is a T04B 60-1. It obvious you have more experience in turbo's then me.

Really I wouldn't know any different to what they sent me other then what's written on the bill.

Ian

oh wow and they actually make 4" inlet, 3" outlet for a 60-1 compressor part # 20177 .. ill be damned... i've never seen one of those before.

yeah thats definitely possible to make that power with.. but is still nothing like the to4b triangle power was asking about

Yup. Notice a difference even thought I cannot read it. LOL

I'm not sure what a V1/V2 is. Never seen that before. What manufactor supplies these particular turbos?

I'll definitely eat my words on this one. thats good power for 15 psi, street port? your to4b is a lot different than the one he was asking about tho..

Yes, Turbonetics naming convention is a little strange. Normally everyone else calls the a T04S.

IAN from now on tell people you have a T04S :D

Turbonetics also make a 62-1 wheel with a T04B housing as well...

yeah they all have weirdass naming conventions... the turbo he was talking about was what I'm used to calling a to4s. garret does some weird shit too.. ie gt-40 50 trim, is smaller than a gt35r ... crap like that is annoying and they need to do without it....

I'm actually about to change to a pt61 (to4s cover, gt35r wheel) from the gt-40 to flow more.. go figure.

and as for triangle power, get at least a 60-1... if you plan to run more boost than 15, and dont want to spring for the ball bearing gt35r, checkout the pt61, or the pt63

The 60-1 in it's full name is a T04B 60-1. Calling it just a T04B could mean any of the T04B wheels. If you're not gonna call it the full "T04B 60-1", then just call the turbo a "60-1" or a "T04S" as to not confuse people (T04S is just what they call the compressor housing).

?????


The t04b is perfectly sized for a 13bt. Like it's already been mentioned then 60-1 is probably one of the most popular aftermarket turbos for the FC. The v-trim and h-trim t04b turbos are no peashooters by any stretch of the imagination. The stock ht-18 however IS a pea shoooter.