scary spec - Page 61 - Perth-WRX.com

scary · #**601** 16-04-2014, 03:57 PM

Quote:

Originally Posted by American Dave

6758 is the go then unless you are prepared to wait

when was the last time you saw me rush?

I can wait (don't want to but I can)

American Dave · #**602** 16-04-2014, 03:59 PM

then wait it out no problem

RoughStilin · #**603** 16-04-2014, 07:37 PM

Quote:

Originally Posted by scary

More top end - keep bottom end as much as possible

300kw+ ATW on 98 550NM+

Basically defy physics

Seriously I expect to lose some bottom end and slower spool but that is why the EFR is quite tempting.

With Fullrace telling me that an EFR 6758 is 53lbs/min and a GTX3071r only 2lbs/min more and then following on to say that it will spool faster than a TD05 it sounds too good to be true.

The big question is will 53lbs/min provide enough flow for 300+kw ATW?

See email below from Fullrace

Are you able to give me some advice on sizing for an BW EFR.

I have a Subaru Legacy GTB with a Cosworth CS600x long motor (2.65L, 272 Cams etc)

I currently run a stock location Blouch TD05-18G XT.

I am looking for more power while trying to retain a much low end spool as possible.

Is the 67/58 0.64 the correct size?

Does a 7163 fit in the stock location?

I have attached a dyno of the car currently and I would like to gain 50kw at the wheels.

response

Hey Shane,
That turbo is between 43-47 lbs per minute. The EFR 6758 will be 53lbs per minute, but will spool faster. The 7163 will fit in the stock location but we are still months out on having them in stock.
The EFR 6758 would get you the gains you want and the spool as well.

I don't believe a TMIC will handle 400hp Shane, I honestly don't. What are your thoughts on this?

If you want 400hp & only 400 (300KW) I would get the 3071 & get it now, fuck waiting "month out" I don't know anything about the Borgs, so the 6758 may also be the go. I honestly believe the quicker spool that is advertised of the Borg 67, will be fuck all in real terms. You "should" be able to get yourself a 3071 for around 1500 - 1600. You wont have to pay import tax, plus the very average exchange rate we have right now on the borg.

The Borg, has / is newer better technology. I do know 2 people who have tried a standard 35R vs a GTX version & noticed negligible differences. At best you may be talking 300rpm or so earlier spool, which in the seat of the pants is almost as quick as the blink of an eye.

If, which you probably will want more once you have got used to the 400hp, get the 3076 & be done with it. If you think you may be falling asleep one night & be thinking I want more again, start thinking rotated mount & a GT40 or even GT46 / Precision 6788.

What you can do is fit the 3071 & see how the top mount holds up?

Dan [GTI] · #**604** 16-04-2014, 08:12 PM

It would have to be one monster TMIC to hit 400hp, this combo managed 391HP in the US.

EDIT: forgot AD, he would be an even better example

scary · #**605** 17-04-2014, 09:30 AM

Quote:

Originally Posted by RoughStilin

I don't believe a TMIC will handle 400hp Shane, I honestly don't. What are your thoughts on this?

If you want 400hp & only 400 (300KW) I would get the 3071 & get it now, fuck waiting "month out" I don't know anything about the Borgs, so the 6758 may also be the go. I honestly believe the quicker spool that is advertised of the Borg 67, will be fuck all in real terms. You "should" be able to get yourself a 3071 for around 1500 - 1600. You wont have to pay import tax, plus the very average exchange rate we have right now on the borg.

The Borg, has / is newer better technology. I do know 2 people who have tried a standard 35R vs a GTX version & noticed negligible differences. At best you may be talking 300rpm or so earlier spool, which in the seat of the pants is almost as quick as the blink of an eye.

If, which you probably will want more once you have got used to the 400hp, get the 3076 & be done with it. If you think you may be falling asleep one night & be thinking I want more again, start thinking rotated mount & a GT40 or even GT46 / Precision 6788.

What you can do is fit the 3071 & see how the top mount holds up?

I don't think the top mount will be too much of an issue - the Process West one I run is as big and thick as a small front mount.

Intake temps drop to the 40's as soon as you get moving (even at Wylie on the weekend where heat soak in the lane saw over 75 before the starts)

I think the one thing that I haven't pointed out is

THIS IS A ROAD CAR NOT A WANNABE RACECAR.

I think that as soon as the decision comes that I need to do a twist mount, FMIC, exceed 300kw ATW etc this no longer is the car to be sedately driven on a 20km round trip to work and back everyday - it is already closer to being a pain in the ass than I would like for everyday.

Hence it will not live on E85 until it is readily available, be chopped up for a front mount etc etc

Stock location turbo and daily drive with enough poke to keep me entertained for track days etc.

Now is not the time for me to have a track only car because my expectations are too high for what I want - but if down the track I feel the need for more then I will build something without the compromises that will suit what ever motorsport I am looking at.

trainwrex · #**606** 17-04-2014, 09:42 AM

Shane

Whats the size of the rear housing for the stock location BW and garret? that will be your limiting factor in making really good power.

I can tell you know in real world terms the BW turbo 8374 has amazing off boost response compared to my garret 40R. It felt like a 35R in terms of spool imo.

The dyno plot does not show the true benefit of this type of turbo. i would definately recommend it over garret.

RoughStilin · #**607** 17-04-2014, 11:33 AM

Well do the 3071 then & use everything as it sits right now. I can't remember what power your meaning but 340 ish hp springs to mind. Put on the 3071, keep the top mount, push 1.6 ish bar of boost & ill be supprisef if your not getting close to 400 hp

SL33P3R · #**608** 17-04-2014, 12:33 PM

Have had 300kw (400hp) with that exact engine in a '05 sti running a stock location of the turbo (AVO from memory) and hyper flow TMIC

scary · #**609** 17-04-2014, 01:59 PM

Quote:

Originally Posted by SL33P3R

Have had 300kw (400hp) with that exact engine in a '05 sti running a stock location of the turbo (AVO from memory) and hyper flow TMIC

on whose dyno?

scary · #**610** 17-04-2014, 02:02 PM

Quote:

Originally Posted by trainwrex

Shane

Whats the size of the rear housing for the stock location BW and garret? that will be your limiting factor in making really good power.

I can tell you know in real world terms the BW turbo 8374 has amazing off boost response compared to my garret 40R. It felt like a 35R in terms of spool imo.

The dyno plot does not show the true benefit of this type of turbo. i would definately recommend it over garret.

BW 0.64

3071r - waiting for a response from Tuspeed

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