Borg Warner 8374 EFR vs. Precision 6266 CEA - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

asiasi · 13th June 2012, 09:04 PM

EFR loses out !

MrGT · 13th June 2012, 10:27 PM

Plenty of people making really good power on precision turbos now.

I like the look of the 6262 as an option for a single on mine.

Tib

Lith · 13th June 2012, 10:28 PM

Yep, posted that a few months ago: Borg Warner EFR turbos coming soon...

Though it seems to be a consistant theme that the EFR turbos have a lot of advantage you can't see on the dyno, the PT6266 clearly makes more power but its also laggier - the EFR turbo's strength is apparently in its (relatively) immediate response and general ability to build boost under load.

Someone in NZ tested a GTX3076R vs an EFR7670 on a 2litre Subaru and the dyno plots didn't look wildly different, but found the driving experience to be far more in favour of the EFR than the dyno results would indicate - one of the most impressive things being that on a corner on a track he previously always ended up in that difficult "Too low in the rpm in 3rd so have to hook 2nd, just to hook 3rd again because too high in the rpm" situations so the lesser evil was to stay in 2nd, while now with the EFR he can hold 3rd all the way through.

He has also logged hitting 28psi by ~3000rpm under constant load on a 2litre, which is silly for something which has made 550whp on 28psi on a 2litre.

These turbos are clearly for different target audiences, the Precision turbos would be more your cup of tea for outright power/drag racing - though for track racing the EFRs are seeming mroe and more like they could still prove to be the ticket.

Fuzzy · 14th June 2012, 08:43 PM

(2bar)30PSI @ the EFR? Do you use only 1/2 capability?

Who drives the Garrett 2860-5 with ~1.3bar to take the maximum power out of the turbos?

look @ the Map

Sound Performance is a Precision Dealer, any questions?

Lith · 14th June 2012, 08:44 PM

That was all in, the turbo was maxed out.

asiasi · 14th June 2012, 09:04 PM

Quote:

Originally Posted by Fuzzy

Sound Performance is a Precision Dealer, any questions?

The point of my post was purely to show a dyno comparison.The EFR turbo range has quite a lot of hype around it,and untill they are made more widely available any info is helpfull,whether it biased or not.

Sorry Lith missed that you had already posted results.

Lith · 14th June 2012, 09:37 PM

Quote:

Originally Posted by Fuzzy

(2bar)30PSI @ the EFR? Do you use only 1/2 capability?

Sound Performance is a Precision Dealer, any questions?

I see you edited your post after I responded. Lets look at this a different way, do you have any evidence of an EFR8374 making more power than this one? I haven't seen anything there to suggest that they have done anything to undercut the BW's potential, it spools better and its making a heap of power - just not as much.

What makes you think that SP wouldn't have started pushing EFRs if they returned a better result?

bigmikespec · 15th June 2012, 03:50 AM

Quote:

Originally Posted by Fuzzy

Sound Performance is a Precision Dealer, any questions?

Yes... where are compressor maps!?

Fuzzy · 15th June 2012, 06:22 PM

I would never buy a turbocharger without a compressormap.
Buy a turbocharger without a compressormap is a bad choice, this is my opinion

only good turbochargers have detailed infos, because they do not have to hide

Brains · 15th June 2012, 06:54 PM

I'll get a dynograph up when my RB26 with a 6266 is finished

Coolwhip · 15th June 2012, 09:49 PM

Jan, you'll love it

Brains · 16th June 2012, 07:57 AM

Quote:

Originally Posted by Coolwhip

Jan, you'll love it

Oh indeed i will! My friend had a 6262 on his 2L engine.. It was insane with over 700whp!

infamous_t · 16th June 2012, 08:05 AM

I wonder if the manifold was twinscroll...

asiasi · 16th June 2012, 08:58 AM

Hks/full-race t4 exhaust manifold test results

infamous_t · 16th June 2012, 11:39 AM

LOL that thread is a can of worms

13th June 2012, 09:04 PM	#1 (permalink)
asiasi asiasi is . GTROC Member Join Date: Dec 2007 Location: London Posts: 1,627	Borg Warner 8374 EFR vs. Precision 6266 CEA EFR loses out ! __________________

13th June 2012, 10:27 PM	#2 (permalink)
MrGT MrGT is think I might want a r32 gtr GTROC Member Join Date: Jul 2009 Location: in the fast lane Cars owned: series 2 R33 GTR (cold climate spec) Posts: 1,436	Plenty of people making really good power on precision turbos now. I like the look of the 6262 as an option for a single on mine. Tib __________________ GTROC Area Rep-North West Behold a white GTR, and the man who sat in it was Death and hell followed with him. upcoming Northwest events. Northwest mini meet and photoshoot, (date yet to be comfirmed)

13th June 2012, 10:28 PM	#3 (permalink)
Lith Lith is lurking GTR Register User Join Date: Oct 2006 Location: Wellington, NZ Cars owned: R33 GTS25t Posts: 2,141	Yep, posted that a few months ago: Borg Warner EFR turbos coming soon... Though it seems to be a consistant theme that the EFR turbos have a lot of advantage you can't see on the dyno, the PT6266 clearly makes more power but its also laggier - the EFR turbo's strength is apparently in its (relatively) immediate response and general ability to build boost under load. Someone in NZ tested a GTX3076R vs an EFR7670 on a 2litre Subaru and the dyno plots didn't look wildly different, but found the driving experience to be far more in favour of the EFR than the dyno results would indicate - one of the most impressive things being that on a corner on a track he previously always ended up in that difficult "Too low in the rpm in 3rd so have to hook 2nd, just to hook 3rd again because too high in the rpm" situations so the lesser evil was to stay in 2nd, while now with the EFR he can hold 3rd all the way through. He has also logged hitting 28psi by ~3000rpm under constant load on a 2litre, which is silly for something which has made 550whp on 28psi on a 2litre. These turbos are clearly for different target audiences, the Precision turbos would be more your cup of tea for outright power/drag racing - though for track racing the EFRs are seeming mroe and more like they could still prove to be the ticket. __________________

14th June 2012, 08:43 PM	#4 (permalink)
Fuzzy Fuzzy is unaware they can edit their status GTR Register User Join Date: Jun 2007 Location: Germany Cars owned: Nissan Skyline R33 GT-R Posts: 209	(2bar)30PSI @ the EFR? Do you use only 1/2 capability? Who drives the Garrett 2860-5 with ~1.3bar to take the maximum power out of the turbos? look @ the Map Sound Performance is a Precision Dealer, any questions? __________________ Last edited by Fuzzy; 14th June 2012 at 08:53 PM..

14th June 2012, 08:44 PM	#5 (permalink)
Lith Lith is lurking GTR Register User Join Date: Oct 2006 Location: Wellington, NZ Cars owned: R33 GTS25t Posts: 2,141	That was all in, the turbo was maxed out. __________________

15th June 2012, 06:22 PM	#9 (permalink)
Fuzzy Fuzzy is unaware they can edit their status GTR Register User Join Date: Jun 2007 Location: Germany Cars owned: Nissan Skyline R33 GT-R Posts: 209	I would never buy a turbocharger without a compressormap. Buy a turbocharger without a compressormap is a bad choice, this is my opinion only good turbochargers have detailed infos, because they do not have to hide __________________

15th June 2012, 06:54 PM	#10 (permalink)
Brains Brains is nuts. GTR Register User Join Date: Jul 2010 Location: Sweden Cars owned: Vcam'd R33 GT-R Posts: 800	I'll get a dynograph up when my RB26 with a 6266 is finished __________________

15th June 2012, 09:49 PM	#11 (permalink)
Coolwhip Coolwhip is that guy from Raw Brokerage GTR Register User Join Date: Apr 2008 Location: Orlando, FL Posts: 130	Jan, you'll love it __________________ Raw Brokerage - Performance Parts and Services To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. RB20, RB25, RB26, RB30 Engine Parts and Built Motors! GTR and Skyline suspension, brakes, wheels, and more... Phone: 1 (407) 538-0098 Email: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Paypal: To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

16th June 2012, 08:05 AM	#13 (permalink)
infamous_t infamous_t is drunk off pancakes GTR Register User Join Date: Jul 2007 Location: Perth, West Australia Cars owned: R32 GTR Posts: 1,321	I wonder if the manifold was twinscroll... __________________

16th June 2012, 08:58 AM	#14 (permalink)
asiasi asiasi is . GTROC Member Join Date: Dec 2007 Location: London Posts: 1,627	Hks/full-race t4 exhaust manifold test results __________________

16th June 2012, 11:39 AM	#15 (permalink)
infamous_t infamous_t is drunk off pancakes GTR Register User Join Date: Jul 2007 Location: Perth, West Australia Cars owned: R32 GTR Posts: 1,321	LOL that thread is a can of worms __________________

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