BorgWarner EFR Discussion

[jsol]

I want to run a twin scroll EFR 8374 with a QSV. Problem is my sport quattro mani is T3 and EFR 8374 twin scroll only come in T4.
The three options I see are 1; Just run single entry T3 or
2; Weld the T4 QSV to a T4/T3 transition and run a T4
twinscroll.
3; Ditch the sport quattro mani and go with a T4 flanged
tube manifold
The second option takes up more engine bay space.
My setup is 2.5 stroker, 10:1 cr, E85, 7A cams, SQ exhaust mani, inlet mani yet to be decided

[PRY4SNO]

In this case I'd say you might as well get an equal length tube mani and go for it.

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[jsol]

Yeah, I think so too. Better pull out of Jonas's GB now. Damn, it was such a good price!

[jsol]

Anyone have any Dyno sheets for EFR8374. Preferably stroker.

[PRY4SNO]

Check Jim Green's build thread at the Project Pad, his car is called the Vomit Comet. He's got a modern 5 cyl but it's 2.5L and on e85. Good baseline for comparison.

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[jsol]

I read it a while ago. Will read it again tonight. Thanks.

[PRY4SNO]

Also, here's a guy (Josh) with a 2.5 stroker using this turbo, taken from his build thread on the same forum.

http://theprojectpad.com/viewtopic.php?f=11&t=139&start=400

Wish I had more time to discuss the progress, but I have 85 hours worth of welding to do in a 60 hour window. Needless to say, it is making excellent power. Impressions?

EFR8374 is pretty wicked.

Spool valves to work if you tak the time to set them up properly

Big intercoolers with name brand cores are worth their weight in gold

type 44s squat like a MOFO, 225 tires produce the first awd wheel spin on my dyno when rolling into throttle at 7000

We can't wait for our CNC heads to be finish that basically mimick this head on this vehicle

Consuming nearly 6400cc of fuel a minute at 8000 rpm means 20 gallons have vanished fairly quickly.

034's 60-2 on the front pulley truly is a POS, it made us stop at ~610whp/450wtq at about 24.8psi



The dotted lines is our Billet k26 for reference. Yes, this setup is wicked.

Cheers,

Hank

[jsol]

Yes I was very interested in this thread. Hank wasn't happy with the 034 pulley trigger!

[PRY4SNO]

Haha few people were.

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[jsol]

300 hp at a smidge over 4k is acceptable.

[quattro-nick]

stuart (se-30) uses a efr twinscroll turbo,check this thread

http://www.s2forum.com/forum/showthread.php?t=77130&page=6

[vti2]

I want to run a twin scroll EFR 8374 with a QSV. Problem is my sport quattro mani is T3 and EFR 8374 twin scroll only come in T4.
The three options I see are 1; Just run single entry T3 or
2; Weld the T4 QSV to a T4/T3 transition and run a T4
twinscroll.
3; Ditch the sport quattro mani and go with a T4 flanged
tube manifold
The second option takes up more engine bay space.
My setup is 2.5 stroker, 10:1 cr, E85, 7A cams, SQ exhaust mani, inlet mani yet to be decided

If you need a tube mani i can get you one for a fairly price.

[diesel des]

Also, here's a guy (Josh) with a 2.5 stroker using this turbo, taken from his build thread on the same forum.
http://theprojectpad.com/viewtopic.p...=139&start=400

Very nice curves.

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[gabriel.b]

I wouldn't go by the vomit comet too much as the O7K has variable valve timing and the head flows much more than your standard 20vt.
he also has provisions for water/meth but I am not sure if he has that running or not
He also has low enough compression for California 91 octane gas.

just if you are running a quick spool, you are going to want a A/R of 1.00 or more.

[jsol]

I wouldn't go by the vomit comet too much as the O7K has variable valve timing and the head flows much more than your standard 20vt.

Yeah not a good comparison. The heads are very different.