Lithium

Well the Sierra Sierra EVO has knocked 2 seconds off its personal best (which happens to have been the lap record for the track, which it took off HKS) at Buttonwillow on the first day of US Superlap using an EFR8374, gotta be promising...

And the 2011 Catalog: http://www.turbodriven.com/files/pdf/BWTS_...talog_SMALL.pdf

I wouldn't be surprised if the EFR6255 would spool similar or better than a GT2530 though given the wheels are actually bigger it remains to be seen, need to see some results somewhere for one of these turbos to get an idea. Mitsi TD05 wheels are pretty big and despite the plain bearing cores seem to spool very well so its not that simple, will be interesting to see how the fancy light turbine, BB core etc etc come together in practice.

Awesome news - yeah the AVC-R didn't come to the party for my boost control desires as well, a bit disappointed with those things in all honesty.

Gear heads might like this: http://www.turbodriven.com/en/performancet...lReference.aspx

Have you guys ever tried pushing a GT3076R that hard? How do you think the PT5557 would fare on pump gas?

Nice!

Is that 392kw on fully stock bottom end??

Well if you get desparate, I could be convinced though obviously NZ may not be ideal. The bright side is I'd retune to suit as well. I need to go for a forward facing plenum at some point as I am looking at going to an RB30, though currently I have all stock manifolds.

Weren't you saying you got a GT3076R a few weeks ago?

Glad someone else thought that, I've been burnt by suggesting that around JZ folks before so decided to assume that'd be the case here. JZs do seem to have more midrange though. A dyno plot would be very interesting to see. A lad on Skylinesdownunder (NZ Skyline website) is getting his RB30DET GTSt tuned with a 1.06a/r GT3076R shortly on a hub dyno, that should be interesting. http://www.skylinesdownunder.com/forums/sh...ead.php?t=59213

^ Yeah there is a fairly good chance of that. Make sure nothing is leaking anywhere too... I would have hoped a 2JZGTE would make more power than it is on that boost level.

OK that does sound a little low, were any of those a Dynapack? Have you gone into the duty cycle settings of the AVCR and picked up the duty cycle for higher rpm?

Limpus - hitting 30psi and holding/flowing 30psi efficiently are different, there COULD be something else causing it but hard to tell. I've asked before, how much power is it making, or has it even been on the dyno? You would have a good idea from power figure... or what the tuner says regarding what he/she had to do during the tune of how much more the turbo has to give. I run mine on a Dynapack (NZ dyno - same as what Status use), stock manifolds, a big can actuator and an AVC-R - there is nothing overly exotic there, I have just gone through everything and made sure each bit is doing its part properly. No magic, and it could still be better. But anyway I wasn't trying to do this, lets say the Hypergear turbos are all good (they seem to be) so this stays on topic.

Trozzle - I added 2c in regards to why it COULD be boost dropping... when I chose a GT3076R for my RB25 I was aiming for a setup which could flow efficiently enough to push around 22psi of boost into a 2.5litre up to 7000rpm without being silly about it. To do the same on a 3litre I'd personally be looking at using something more like a GT3582R, so really I'd expect the required solenoid duty cycle to maintain 22psi or so in the higher revs to go WAY up when used on a 3litre in higher revs as IMHO the turbo will start hitting its flow limits. Other obvious things to check would be if there are any leaks, either exhaust or intake side. Also, I am not convinced on AVC-Rs at all... when I had the softer actuator on mine I couldn't convince it to bring it anywhere near strong enough onto full boost, I had to upgrade to an 18psi big can unit. Its doing the same things the Hypergear turbos which were used to crack 300kw were doing on RB25s... if you don't quite understand that "boost" isn't a universal thing, what this means is that if you put the 300kw Hypergear turbo onto the larger 2JZGTE and this IS what the problem is - there is a good chance you'd see full boost reached slightly later than the GT3076R, but then boost dropping earlier again and a net result of less hp in the top end. I gave up following the Hypergear threads after there were "not all being equal" factors used too consistantly which could skew things to make it seem the Hypergear was better in comparison than it really was, so not sure exactly what was shown and as such can't really comment. I'm not one eyed or stupid and also don't try and pull the wool over peoples eyes so don't see why you are implying I would suggest a GT3076R would spool better than a GT3071R, keep that brush on the people who do that kind of thing.

Fixed. We know the GT3076Rs spool faster than a 300+kw Hypergear turbo, and here it is holding similar boost on a 2JZGTE as what the Hypergear does on an RB25... its clearly able to pump some air to do that. I'd say however that at that boost level its a good chance that its just maxing out, its not that large a turbo for a decent flowing 3litre - how much power are you getting out of it at that boost level?

If I was in Oz I'd probably be tempted, I am investigating the bits for the next stage of my build and a plenum would be well needed but my options so far definitely contribute to a large percentage of the costs of "the next stage".

They specifically refer to having done R&D into getting the internal gate flow optimal for boost control AND flow though say that there will be cases (ie trying to run really low boost on high flow setups) where an external setup will be needed. Its not a bunch of newbies doing a spur of the moment money making spin here, they mean business... I am pretty confident these things are going to be very good and am fairly confident I know where my money will be going.

If you want to use HKS as the "select a hp level and pick a solution from a catalog" yard stick then it seems like the EFR turbos are effectively going to be servicing the HKS GT-RS to HKS T51R equivalent range... basically most of the options will apply to most of the types of things spoken about in upgrade threads in this forum

Absolutely, Sierra Sierra EVO is running one now - the fact they are broadcasting about it on what is one of the fastest time attack cars ever has got to be a sign of confidence... if it goes quicker than it has before then thats a testament.

I've been keeping an eye out on these for a while, now they are finally about to be released and there is now enough info to make it worth posting about them. From November 1st they should start becoming a lot more talked about, they will be shown at SEMA in the US and the plan is to take turbocharging on performance "spark ignited" vehicles to a new level. There are a variety of different specs and options, and including things like boost control solenoids and BOVs integrated with the turbochargers themselves, internal or external wastegate options, ball bearing core (previously Garrett and IHI have been the main players for the BB obsessed) while also having billet ETT compressor wheels and other things which are the trendy things currently. There has been an aweful lot invested in these, Borg Warner have been working with various tuners and race teams on the development and testing of these and I reckon there is a good chance they'll make a lot of the options which are currently as far as anyone will look become a bit old news - I know I am partly holding off to see what they prove to be like before I make any decisions in regards to what next for my car. Cosworth are one of the companies who have worked with BW on these, and have a bit of a speel on their website: http://www.cosworthusa.com/news/article.asp?idpage=57 Should be interesting to see the first waves of results from these units

Might be a slight difference in response of course

+1, really good to see a dyno plot for one of those finally - had always wanted to see what they behave like.... very nice result.

After years of discovering most people read key words and assume they know what you were saying and having to reiterate or explain things, I am quite a lot lazier about what I say now If someone decides I might possibly have something worth sharing or elaborating on and ask, I will.

There is probably a certain amount of theorising with both of our viewpoints, how do you decide he is more correct than I (or vice versa for that matter? I am happy to stay objective...)? A lot of that will depend on the execution of the whole thing, for example on a V8 - where is the rationale that twin scroll would be less beneficial on a V8 than it would on a 4cyl when a V8 is essentially two 4cylinders? I wrote a big rant ages ago on GTR UK forum regarding the potential benefits of twin twinscroll turbos on a cross plane V8 to combat the effect of the unevenly spaced ignition events on each bank. Also, I have been in Nissans running twin scroll turbos - just on a TS GT35R to compare with the exact equivalent single entry GT35R... hence restraining opinion. Given Disco doesn't sound like he can provide the same comparison, I'd consider it reckless stating a fact without confirming the theory.