Brocker

iTrader: (1)

I have turned of my GT3076R today, because my wastegate is blown away..

Now im thinking to change against the 3071 to get a better response,
so at the moment i need nearly 4000 rpm to get the full power.

But i dont know if the difference is big enough to justify buying a new Turbo?

Has anyone experience to the tell me how much rpm difference is between
these turbos to get full boost?

crazycage

I would swap to a borgwarner efr 7064, would mean a new manifold tho

Brocker

iTrader: (1)

I have never seen a Cosworth with Borgwarner Turbo..

Sonic Boom

iTrader: (11)

They are abit few and far between Rod's got one fitted to his.

As for the original question how much power do you want to make?

Rich

Mark Shead

There are more than a few, Full boost 3400rpm and 500ftlb at 3800rpm on a RR.

Mark

Brocker

iTrader: (1)

I have 420hp on my gt3076r, and i would like to have the same power but with better response..

I heard some good things about the borgwarner, but i never see one in germany on a cosworth and have no idea which modification, changes are necessary to fit them..

I know it was some work to fit the gt3076r, i had to make a other oil return, other water connections and oil inlet..

JonnyBravo

I would simply swap to a 3071 or the billet variant as it will be a direct swap

Sonic Boom

iTrader: (11)

As Jonny says strap on a GTX3071 you'll get a better responce and keep the power level you want.
Rich

Canada1

What turbine housing does your GT3076R have on it?
The turbine (or hotside) is what will determine spool characteristics.

The GT3076R could be ordered with .63, .82, and 1.06 AR turbine housings.
The 1.06 being way too big IMO.

Brocker

iTrader: (1)

I have the .72 Cosworth Style housing.. Before them i had a .63 but it was to smal, the boost goes up to more the 2 BAR with full opened Wastegate

Fast Guy

What boost are you running? That's quite low power for a gt3076r and easily achievable on a gt3071r.

Brocker

iTrader: (1)

I had 420hp at 1,5 Bar, but drove 1,7-1,8 most time.. My Engine is allmost standart,
thats the reason for little less power

BRAMMER

iTrader: (23)

I've got an internal gated GT3076r and this is how mine works, mines not a standard engine

Brocker

iTrader: (1)

I havent a Dynosheet of my car, but i was on enginedyno and had 420HP there.

At the moment im thinking about to change to a 3071 or a Borgwarner, but i dont know the difference at responce and have no idea how tedious it is to mount the borgwarner.

Or i repair my 3076 and swap in the winterbreak..??

Your car revs up to 8.000 rpm??

rsmark86

iTrader: (3)

My old engine made full boost faster than yours with a gt35r .82

But I had fully ported head and cams specc'd to suit the turbo, I honestly think that is what your missing

A cosworth head becomes very restrictive at the power level you are at and you really need at least a inlet cam change, and a decent inlet of some sort


Also what ecu are you running and is it a live mapped car or a chipped standard ecu, all these things will matter at that power

Brocker

iTrader: (1)

I have a Live mapped L8.

scoooby slayer

iTrader: (4)

are you saying you had a gt35 on a 2.0 yb making full boost before 4000 rpm ?

Brocker

iTrader: (1)

GT30..

I never say something about a GT35

BRAMMER

iTrader: (23)

8200 so i believe

Mark are you commenting on my car or Brockers?

scoooby slayer is referring to Marks comment

cossiedave

iTrader: (1)

Where you been to there's a few on cossies now and work well

Brocker

iTrader: (1)

I heard only here from cossis with borgwarner, but i didnt find a lot about it, specialy how to fit etc.

In germany i never heard about a cossi with borgwarner..

Brocker

iTrader: (1)

If the EFR makes a big difference at the responce i could thinking about a swap in Winter, but then i need more Infos about them and how to fit..

At saturday i was on the Nordschleife, my setup feels well at the road, but at the racetrack its not funny to wait for the power after the corners.. Here is a Video from Saturday, but i didnt drive attaking because it was really hot, i had 130°C Oiltemp and didnt drive the track for 2-3 years..

Brocker

iTrader: (1)

Or will be the EFR 7163 a better option?

LHD220Turbo

iTrader: (4)

Mark Shead has done a few YB's with the BW turbo's. From what i can gather you'd be mad to consider anything but a BW.

They are not cheap but worth it for the better repsonse/ spool. unsure what is required to fit the BW, but i believe they do a internally gated one.

hopefully someone who's got a BW fitted can answer your questions

Gazzonator

iTrader: (9)

I've got a GT3076.82 on my saph at the moment which isn't running yet but from what I've been hearing about these Borg-Warner turbos, I'm quite tempted to have a go with one of those instead.

BRAMMER

iTrader: (23)

I'm sure someone said your looking at Ł4k+ to get one fitted and running which is a big difference

Here's one of Justins graphs for his

Canada1

Hello Brocker,

You have full boost by 4000 rpm. That doesn't seem too out of line for a 400+ HP 2 liter engine.
Did you want full boost by 3000 or lower rpm?
I am not sure full boost by 3000 rpm on a 400+ HP 2 liter is possible?
Maybe someone else can comment.

JonnyBravo

TBH I cannot see why if you already have a very good setup you would want to change ? Even more so if you haven't even finished getting your current setup working ?!

There is no denying that the BW appears to be a great turbo but its not exactly a direct fit so costs a lot and I really do feel people under estimate the real world performance you can get from a GT or GTX turbo, more power than most can handle and probably more torque than your transmission can take anyway

Sonic Boom

iTrader: (11)

I really like my GTX3076 it produces 590bhp and 578 ft/lb of torque, if I had the money i'd like to fit a BW but as said it's the best part of 4 grand with the cost of the turbo, twin scroll manifold and two external wastegates.

Cost wise i'd stick with what you have or maybe down size to a GTX3071 to give you better spool up.

Rich

Mark Shead

Using a internal gated EFR would take 30% off that cost.

Mark

Mark Shead

There is a good graph of a 7064 making 521hp and 535ftlb on the Escort site.
It makes 500ftlb at 3800rpm.

Mark

Brocker

iTrader: (1)

I dont know how you reach 4K..

The BW cost only a little more than the GT, i looked for the
EFR7064 with twinscroll and internal WG, bevause i heard the twinscroll spools better
and i would prefer a internal WG. The only negative i see at this setup is the .92AR what could be to big
for good responce?

With T3 manifold its a .83AR, its still bigger then my GT with .72AR, no idea if its still better for the responce?

Ok, i will need a other manifold, no idea how much this cost, i never looked for one,
but i dont know if something else is needed?

Im quit happy with my power, ok maybe i will raise it up to high 400hp
later, but i would like to have better responce with the same power level..

Gazzonator

iTrader: (9)

How would a GTX3071 compare to a GT3076? What's the benefits over the latter?

Brocker

iTrader: (1)

If i read the compressor maps correct, the GTX should have a worser responce as the GT

Mark Shead

Forget about the size diff on twin scroll, The .92 on the internal gate is a bit on the small side,
You have to add the cost of a manifold as well as the turbo.

Mark

Mark Shead

The GTX is a worse turbo than the GT3071/76.

Mark

JonnyBravo

What makes you say that Mark ? is this engine specific as the one my mate has on a 2.5l Skyline is very impressive.

scoooby slayer

iTrader: (4)

I think mark just means response mate, ive not had a gtx yet only a gt but ive read a lot that the gtx versions make more power but always at the cost of response.
and the op seems to be looking for response mainly.

J1mbo

iTrader: (1)

On a yb they are pretty aweful, surge badly and don't come on particularly amazing.

J1mbo

iTrader: (1)

I would be seriously considering dropping that rev limit. At 7850 we have had lifters pump up and clip valves I don't even take my own engine to an 8200 rev limit on long rods, cps and solid lifters