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Old 01-26-2011, 10:46 PM   #1526
garagedefeat
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Quote:
Originally Posted by Beetspeed View Post
The EFR's have been installed by now, but could not find dyno sheets either, at least not from a suby engine.
The GTR crowd has installed one:

YouTube - R34 Skyline GT-R -- Full-Race Twinscroll turbokit -- BorgWarner EFR 8374

Fortunately, the EFR's haven't lost their good sound
I thought the buffering was making the video choppy...no; the car is just that slow!

Hopefully that was put up just for the sound.

Anyways, how many guys are going to cover up the ridiculously small b.o.v. port and run a real b.o.v. of proper valve diameter somewhere else?
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Old 01-26-2011, 10:47 PM   #1527
crashtke
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Quote:
Originally Posted by tino View Post
Interesting discussion.. Im hoping to have my 8374 t/4 1.05 ext wastegate arrive somewhere in Feb for a tune in early March.

The setup will be a direct comparison to my current GT40R 1.06 ext setup on a built 2.5 ltr...
Really looking forward to that.
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Old 01-26-2011, 10:58 PM   #1528
tino
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Quote:
Originally Posted by juanmedina View Post
TS or single? sweet
twin scroll...

Quote:
Originally Posted by crashtke View Post
Really looking forward to that.
Me to..


Although spool wont be as accurate for those with a convential rotated setup (being mine is low mount) we will still see how the plot will change..

As all i am changing on the setup is the turbo. Nothing else, will still be using my external wasetgates and boost controller etc...
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Old 01-26-2011, 11:11 PM   #1529
azn2nr
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Quote:
Originally Posted by garagedefeat View Post

Anyways, how many guys are going to cover up the ridiculously small b.o.v. port and run a real b.o.v. of proper valve diameter somewhere else?
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Old 01-27-2011, 06:47 AM   #1530
sumfoo1
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Quote:
Originally Posted by garagedefeat View Post
I thought the buffering was making the video choppy...no; the car is just that slow!

Hopefully that was put up just for the sound.

Anyways, how many guys are going to cover up the ridiculously small b.o.v. port and run a real b.o.v. of proper valve diameter somewhere else?
I know i shouldn't feed the trolls but.

Quote:
A soundclip of the twinscroll EFR 8374 with internal wastegate, during a low boost launch. many more vids to come - from the youtube link
I mean i guess they could speed it up 1.2x like the N/A honda guys do and make it seem fast.

Also i'm not really sure you know much about bypass valve sizing.... either.....
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Old 01-27-2011, 11:35 AM   #1531
thefoos
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Quote:
Originally Posted by garagedefeat View Post
Anyways, how many guys are going to cover up the ridiculously small b.o.v. port and run a real b.o.v. of proper valve diameter somewhere else?
Something tells me an OEM wouldn't intentionally make the BOV port too small. How big/small should a BOV port be?
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Old 01-27-2011, 12:42 PM   #1532
sumfoo1
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whats a good assumption for a stock EJ255 VE on the bw turbo match bot?
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Old 01-27-2011, 12:50 PM   #1533
MartinSTi05
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Quote:
Originally Posted by thefoos View Post
Something tells me an OEM wouldn't intentionally make the BOV port too small. How big/small should a BOV port be?
Remember. All Tooners know better than the manufacturers. Especially the engineers.
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Old 01-27-2011, 01:01 PM   #1534
sumfoo1
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Originally Posted by MartinSTi05 View Post
Remember. All Tooners know better than the manufacturers. Especially the engineers.
especially since they keep saying BOV when its a bypass!!! the only way that thing would be a bov is if the turbo inlet had no filter or piping on it.
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Old 01-27-2011, 06:02 PM   #1535
crashtke
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We are about 3/4 of the way done with this build and I figured I would share some EFR Miata pics. Just waiting on some parts at this point to finish it all up. My partner Andy has outdone himself. It really is turning out nice.








Last edited by crashtke; 01-27-2011 at 06:12 PM.
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Old 01-27-2011, 06:15 PM   #1536
MartinSTi05
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Holy collector Batman!
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Old 01-28-2011, 09:12 AM   #1537
andymullins
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Originally Posted by MartinSTi05 View Post
Holy collector Batman!
That is what makes time travel possible. Oh wait, wrong movie.
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Old 01-28-2011, 08:19 PM   #1538
garagedefeat
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Quote:
Originally Posted by sumfoo1 View Post
I know i shouldn't feed the trolls but.



I mean i guess they could speed it up 1.2x like the N/A honda guys do and make it seem fast.

Also i'm not really sure you know much about bypass valve sizing.... either.....
Quote:
Originally Posted by sumfoo
A soundclip of the twinscroll EFR 8374 with internal wastegate, during a low boost launch. many more vids to come - from the youtube link
I mean i guess they could speed it up 1.2x like the N/A honda guys do and make it seem fast.

Also i'm not really sure you know much about bypass valve sizing.... either.....
I have a BW on my car now - i'm not in here to troll. I just love when people put up videos of absolutely no pertinence...like this one. Sounds great....from the mic on the video camera 20 feet away

Quote:
Originally Posted by martin
Something tells me an OEM wouldn't intentionally make the BOV port too small. How big/small should a BOV port be?
Remember. All Tooners know better than the manufacturers. Especially the engineers.
it's a legit question. Do the engineers over at Tial randomly make the valve in their BOV's (bypass....whatever...you know what it is...semantics) 50mm? Do race teams -- more than likely full of engineers -- sometimes use 2 valves with openings ~ 50mm arbitrarily? it just seems way too small to me, and clearly designed for an oem app of some sort (you see this kind of integration all the time on oem bits).
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Old 01-28-2011, 10:26 PM   #1539
azn2nr
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and some race teams dont run one at all.
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Old 01-29-2011, 03:25 AM   #1540
wrxsti.l
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Anyone running a 0.92 twinscroll version of the 7064 with iwg? Anyone got some dyno comparisons of it to a GT3076R?

Ideally I like to see some results of a 2L if possible.
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Old 01-29-2011, 09:50 AM   #1541
thefoos
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Originally Posted by wrxsti.l View Post
Anyone running a 0.92 twinscroll version of the 7064 with iwg? Anyone got some dyno comparisons of it to a GT3076R?

Ideally I like to see some results of a 2L if possible.
It will be a 2-3 months before I have results to post up, but I'll have a 6758 .92 IWG TS on my 2L. I don't work in the cold if I can avoid it.

By my calculations, if you are going to keep boost under 25 psig, thats the proper turbo to run. If you plan to run more boost, the 7064 would be a better choice.
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Old 01-29-2011, 11:41 AM   #1542
juanmedina
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I been thinking about this EFR turbos and in reality they are really cost effective. IMO a rotated single scroll and twin scroll should be priced as follows;

Single Scroll:
Turbo= about $2000 if you go with 8374 IWG
Uppipe= $300
Downpipe= $500
CAI= $200
Total= $3000
Thats cheaper than most kits currently outer , if you know people you can get all the piping for $500 bucks

Twin Scroll:
Turbo= about $2000 if you go with 8374 IWG
Uppipe= $400
Downpipe= $500
CAI= $200
Header= $1000
Total= $4100
Still not bad at all.


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Old 01-29-2011, 11:50 AM   #1543
crashtke
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Quote:
Originally Posted by thefoos View Post
It will be a 2-3 months before I have results to post up, but I'll have a 6758 .92 IWG TS on my 2L. I don't work in the cold if I can avoid it.

By my calculations, if you are going to keep boost under 25 psig, thats the proper turbo to run. If you plan to run more boost, the 7064 would be a better choice.
We had one of those ordered and we were informed that they will no longer be making the twin scroll 6758. Has that changed?
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Old 01-29-2011, 01:53 PM   #1544
icky
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There are some dyno's on clubrsx of a gt3582 vs. efr8374 on a built k20 15 psi.

http://74.86.108.88/showthread.php?t=744766&page=12


video on pg 13
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Old 01-29-2011, 02:22 PM   #1545
Phatron
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still surprised people arent commenting more about the wg not being able to hold over 20psi during that test.....unless he was referring to something else when he said actuator....
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Old 01-29-2011, 02:33 PM   #1546
seanathanq83
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Quote:
Originally Posted by Phatron
still surprised people arent commenting more about the wg not being able to hold over 20psi during that test.....unless he was referring to something else when he said actuator....
That's what I posted a while back and everyone Just looked it over, not sure if You can get different ones, or tighten it, but yea That's no good
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Old 01-29-2011, 02:49 PM   #1547
aboothman
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There is nothing to discuss. If you read the rest of the thread, it is mentioned that it shipped with a lighter spring, and he just needs to add a stiffer spring of add more preload.
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Old 01-29-2011, 02:51 PM   #1548
kellygnsd
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I think Geoff said they were shipping with low psi actuators and at a later date they would offer 3 or 4 different springs. That would be pretty sad if the one supplied would even net you 20psi though.
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Old 01-29-2011, 04:15 PM   #1549
xsblack
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In that RSX comparison the EFR tune is leaner almost everywhere. I wonder if that has any effect on the spool and total power output of the turbos being tested.
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Old 01-29-2011, 04:26 PM   #1550
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Originally Posted by xsblack View Post
In that RSX comparison the EFR tune is leaner almost everywhere. I wonder if that has any effect on the spool and total power output of the turbos being tested.
on 91 octane i doubt it would make much difference at all. if its going that much leaner at the same psi, i think thats shows how much more efficient the turbo is at moving cool air into the motor.
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