SpAm@FC

iTrader: (4)

Hi guys!

I've got a killer deal on a gt3076r and want to use this turbo on my stock port 13B REW! (and no, i don't want to use a gt35r if i can use this smaller turbo don't need a 400-500hp machine)

What do you think about this setup?

gt3076r CHRA
divided T4 exhaust housing 1.06A/R (for reference: http://www.atpturbo.com/mm5/merchant...egory_Code=GTH)
4” inlet anti surge compressor housing for the gt3076r (for reference: http://www.atpturbo.com/mm5/merchant...egory_Code=GCH)
full race twin scroll manifold (for reference: http://www.full-race.com/catalog/pro...oducts_id=1869)
2 Tial 44mm MVR waste gates
3"->4" downpipe with plumped waste gate pipes

How much power on which boost levels can i estimate?

I think/hope the spooling charakteristic will be insane on this setup...

Give me your thoughts

greets
Patrick

thewird

iTrader: (8)

Just keep your twins. 35R would be the smallest single turbo I'd ever run on an REW. Expect to get 350-400 rwhp on a 35R. Anyone that gets more then 400 rwhp out of a 35R is pushing things (arguable) which is sounds like you don't want to do anyway. There are cheaper similar options to the 35R as well like the precision billet 6262 and 6265.

Putting that tiny turbo on that manifold with a 4" exhaust would be such a waste and your top-end would be limited.

thewird

Turblown

iTrader: (12)

Turbine wheel is too small, and even though ATP offers a " T4 " turbine housing, its just T4 flanged.. You are still running a T3 volute.

If you want to limit yourself to 5.5k rpms go ahead. As mentioned the exhaust size is way overkill on that turbo. Turbo manifold runners are also too large in diameter for that size turbo( will hurt "spool", and it appears " spool " is your goal..)

Sesshoumaru

iTrader: (1)

On stock port (90% for estimate) and at 7k you're still barely on the compressor map at 1 bar.

RPM CID VE PR FT^3 PSI CFM lbs/min
7000 80 0.9 2.02 1728 15.00 589.2857143 40.66lbs/min

max hot is going to be about 26 lbs/min on the 1.06 (84 trim) on the 76mm. Fairly similar to the 82mm at the 28lbs/min at 1.06 A/R

Your small on both hot and cold.

Would not be an ideal turbo as 40.5lbs/min is around 311rwhp.

A GTX30 with a P trim wheel would be more interesting.

SpAm@FC

iTrader: (4)

@thewird

The twins are definitly a no-go for me, because of the generated heat, the package and the weight...
I want to have a clean setup on my car (which is only used for track use)...

@turboblown

thanks for the info regarding the T3/T4 thing, didn't know that

@Sesshoumaru

I know there are 2-3guys here on the forum who are running a gt3076r and are very happy with it!
Whats exactly the problem with my setup? To much pressure difference before and after the turbine wheel?
Is there no possibility to run the 3076r on the rew? (like another A/R)

The point is, I was lucky and I've got the 3076r for 270€ I love fast spooling cars (like the twin turbo Z of a good friend of mine), therefore i thought it will be a good buy...

If there is really no possibility to run the 3076 on my rx7, maybe i just sell it with profit or slam it onto my other track ***** (bmw e30 touring with m50b25tü engine )

Sesshoumaru

iTrader: (1)

I said it would not be ideal.

It is very possible to run the turbo (you even said you knew of other people that have done it).

I think it would be something similar to a stock S4 turbo on the REW which other people have also done.

The problem is your limiting factor would be the turbo and your to the point of diminishing returns where a step up would not be that large of a draw back and will gain you a bit more room.

If you are going single for sure then try it out on the FD. Worst case scenario if you don't like it swap it out for another turbo which is a minor ordeal.

Trots*88TII-AE*

iTrader: (11)

So a 60mm inducer on the turbine wheel and 84 trim would make for a 55mm exducer. Just for reference, the FC turbine wheel measures around 64mm inducer & 53mm exducer, so you would be roughly equivalent to or slightly smaller than a stock FC single. One thing rotaries do not like is exhaust restrictions.

My opinion would be you'd be better off selling it, and buying something along the lines of a T04E 60 trim with a proper-sized turbine wheel i.e. P-trim. You would get the same (if not possibly better) spooling, without choking up top and causing a lot of exhaust back-pressure, and still be good for up to around 400whp on stock ports.

neit_jnf

iTrader: (17)

sell it and get a gtx3076 instead. saw a 13B-REW with one that produced 370whp 300wtq at 16psi

Power: 370 HP and 300 TQ to the Wheels at
16 PSI of Boost

Motor:

- 13Brew (2 rotor turbo out of a 3rd gen RX-7)
- 9.7 high compression Super Lightweight rotors
- Racing Beat Street port
- Ceramic Apex seals
- Garrett GTX3076 Turbo
- Tial 52mm wastegate
- Motec boost controller
- Tial BOV
- 7parts Stainless Manifold
- Coast Fab. 3" Race Exhaust
- Motor built by Jim Mederer of Racing Beat
- 7Parts Custom Intercooler
- Racing Beat Aluminum side housings

http://www.7parts.com/jeffkiesel.html

arghx

iTrader: (3)

Do it and report back. Nobody here is speaking from first hand experience with the exact setup you are proposing.

AMRX7

I would think you could make 300 ft-lbs and high 300's whp without too much difficulty with that setup. The downside would be if you need to make those numbers sustained on the track. I run a similar sized setup, but it is for autocross only which is very short duration. I think sustained boost and revs that little of a turbo will get very hot since you are out on the 60%ish side of the efficiency map at high revs.

-Andy

Slides

Should be like having a roller bearing high-flow s5 turbo, worth a try if you want response, will still be more efficient than a high-flow.

If the factory turbos are tired it probably isn't a bad option for the cost & being able to swap to a bigger T4 turbined setup easily is a plus.

You really arn't going to loose anything by trying.