Ok, I'm new here, but not to cars. I did a search but all the rx-7 owners that were using a to4B were on FCs.

I want to know if the FD with to4B is pretty much like a stock twins setup? to4B flows around 50lbs/min (the one i'm looking at anyway) I want it to spool fast and be a streetable turbo for casual driving and mountain passes.

I'm thinking of using a to4B a/r .96 on exhaust side and .60 compressor side
P trim turbine wheel and V trim compressor. What do you guys think?

How much flow do the twins put out anyway?

Any help is appreciated, thanks in advance

 

How much flow do the twins put out anyway?

Any help is appreciated, thanks in advance[/QUOTE]

I think Howard Coleman told me 46lbs per min...

 

46lb/min vs 50lb/min isn't a big difference then right?

 

anyone ?

 

I think they have a wheel called super H that flows more, could be mistaken though. even though the flow is similiar, 45ish vs 50ish it would drive totally different.... the stock setups lose almost as much HP as they make in the stock config due to the restrictive nature of the manifold and the turbines themselves. so in theory it should gain you a little due to the less restrictive nature of any aftermarket manifold over the stock system.

Honestly though if I was going to go to the trouble, I think that I would prefer a larger compressor wheel. your turbine side would be ok though... why not just send it out and have a 57 or 60 trim E wheel and cover slapped on it?

kenn

 

Honestly though if I was going to go to the trouble, I think that I would prefer a larger compressor wheel. your turbine side would be ok though... why not just send it out and have a 57 or 60 trim E wheel and cover slapped on it?

kenn[/QUOTE]

I think a 60-1 wheel would give you the cfm you may be looking for, 57lbs/min. The T04E 57 or 60, though a more updated turbo, are still in the same ball park as previously mentioned, 49 and 50 lbs/min repectively.

 

Thanks for the help guys! so I should upgrade the compressor wheel and cover, i'll look into that.
I saw some posts of people saying this compressor will "choke" an fd because the size of the compressor is too small, any comments on that?
I will be looking for a bigger compressor side but would this be ok for now?

It's pretty easy to swap out turbos on a single turbo setup anyway so I wouldn't mind doing it later on.

 

I saw some posts of people saying this compressor will "choke" an fd because the size of the compressor is too small, any comments on that?

I think you mean to small a turbine and or housing would choke the system due to back pressure.

 

shouldn't this go to the single turbo section?

 

Yeah, I think it will be better in single turbo.

 

T04B isn't a good turbo for a FD, and .60 compressor isn't optimal anyways. .70 would be more optimal. From what I know T04B is an older design and less efficent than T04E, etc. Would a T04B work in a bind? Yeah is it worth tuning, would you make decent hp for the cost involved? no. Honestly IMO just get something like a gt35, or if you want a T4 print a T04E, if you want over 400hp go 60-1(T04S). The T04B isn't worth it.

 

After removing my TT setup I ran a Borg Warner T04b untuned at 10psi. Their is no comparison between the stock twins and a small T04b. The power gain was unbelievable even at the same boost levels. Spool up was very reasonable (10-psi by 3200rpm stock ports) but started to run out of juice after 6500 rpm.

 

what about a t04e would that be better to get? how much power is it good for?

 

the To4b should be good enough to put 300-325hp's to the ground around 12-15 psi. A small To4e will do about the same. I am sure the stock twins will do close to the same of course real numbers will change from setup to setup

 

dont listen to all these guys dude. i made 360whp with a t04b vtrim and a ptrim turbine wheel. this was also done at 15psi on pumpgas.

t04b vtrim.

and BASTARD, please explain what a "small t04e" is... i'd consider a smaller t04e wheel to be a 50 trim, which is going to make considerably more power than a t04b vtrim at the same boost due to it having a much larger major, bigger housing and bigger compressor housing A/R.

a t04b vtrim will be fine and make over ~350whp at 15psi. it flows a little more than full non-seq FD twins and is MUCH MUCH simpler and cleaner in the engine bay. if you have any more questions, i'll be glad to elaborate some more.

edit: also, i forgot to mention: a .96 p-trim housing may be slightly too laggy for you. i'd suggest an .81 if you have stock ports.
i have this turbo: t04b vtrim .81 a/r ptrim and it is great.

 

tdazmansFD,

So it's a good street turbo but not a good highway turbo?
What are your reviews on it?

jacobcartmill,
How do you like your setup overall, for street/highway etc?
and your turbo is the v trim of super V?

Thanks once again!

 

gt35r was my choice for a streetable turbo. its cost a pretty penny but works well with stock ports and spools to 15psi before 4000 rpm in 3rd gear, in 4th close to 3500 and 3300 in 5th. I have raced alot of turbo cars that give me props on how fast this thing spools, cause I normally get out quick and then pull away harder. makes the car very fun to drive, useable power.

I know its not what u were askn about but u should look into it.

 

i'm not sure why there would be a difference between the turbo on the street and the highway... if it lags it lags. my turbo is the v1/v2, which is the regular "vtrim" and it cost 350 shipped.

 

No complaints about the turbo at all. In fact I was very impressed with it's capabilities over the stock twins. It seemed that once I got over 6500 rpm the pull tapered off a little. Nothing major, but remember that my car was'nt tuned. If you're looking for 300-350 whp this turbo will definatley do it and save you some cash too!
.96 AR P-trim

I'm in the process of big HP #'s (450+) so I'll be looking for something in that range now.

 

wow, total turbo snobs in this thread

t04b's and 60-1's have been proven turbos on 2 rotors for a loooooong time before gt35r's have been around.
im sure gt35r is awesome, but it doesnt mean that the old turbos that have been doing good jobs for years still don't do a good job.