Lithium

5.2s reaction time? Did you fall asleep?

Thought I'd share some results from another forum - I think most people here are on-to-it enough to understand whats going on so I'll keep my observations to a minimum: The guy doing these tests (Jeff from Perrin Performance in the US) commented that he was a bit thrown by these results, as the "seat of the pants" impression was that it actually outspooled the GT3076R and GTX3076R turbos he had tested previously on the road, and felt generally more responsive and quicker to recover boost on gear changes - while on the dyno with a steady state rpm increase it appears overall more comparable with a .63a/r GTX3582R in spool and somewhere between the .63 and .82 GTX3582R in flow. He compared a datalog he did with the GTX3076R (green) on the road with one of the EFR7670 (red) and found that even though he went WOT slightly earlier in the GTX3076R log the EFR7670 matches it for full boost at the same rpm and time stamp - meaning it had boost built the boost and climbed rpm in a shorter period of time, aka faster boost threshold My impressions so far from this test are that the EFR7670 in terms of dyno results is going to be most comparable with a GT3582R that spools slightly faster, but it appears than on the road it'll actually drive more like a "fast" GT3076R. Its worth noting that these are comparing T3 open housing turbos all around, the Garretts are all externally gated while the Borg Warner is internally gated. A twin scroll Borg Warner EFR7670 could potentially be completely insane on an RB25DET after seeing these results, I reckon.

Full boost around 5000rpm = not too bad?

Awesome, thanks man

Simon - I'd appreciate your thoughts on this. Remember our $ is weak as anything compared to yours if you freak at the price.. I did some road tuning on an R34 RB25DET powered R32 yesterday which is running some Chinese T3/T4 and found the thing was maxed out at 1.1bar, the owner wants 300wkw on pump gas with streetability but like everyone doesn't want to spend thousands - was thinking of suggesting this turbo as an option with 10cm housing if its anything like yours: http://www.drivenperformance.co.nz/scripts/prodView.asp?idproduct=1810

Might just be the dyno - last time I had mine on a rolling road it was around 284rwkw from memory, a few months ago.

How old is old?? Mine is almost 200,000km and at 1.2bar it goes quite chirpily

I will definitely update this thread when I can find some useful info

Weekday - was at work when they did the run Quite a promising run though, sounds like they have it hooking up nicely

Because they might not make GT42 based power, I'm guessing. The rest of the questions are irrelevant imho as he clearly already has that sized turbo, and must be happy with everything about it but the spool. Rockabilly has a GTR, so your point doesn't relate to him

Just heard the GTR did 7.65 @ 181mph off its fastest ever 60ft on its first run this year today, probably more to come

I hope its really stout, I'd hate for something to go through the turbine - but that has potential to work really really well. Nice, look forward to results!

Man I don't know how I missed this first time, very nice - whats the spec on it?

This will be interesting

There is plenty of independent testing around the place showing pretty tight comparison between Borg Warner and Garrett GT-BB equivalents, sometimes Garretts can come out strong and sometimes the Borgs can. I am saluting one of the American Subaru tuners who has doing a completely straight up non-biased comparison between GT3076R, GTX3076R and EFR7670 turbos on exactly the same car. The GTX3076R was a little laggier than the GT3076R but made more power, the EFR7670 is yet to be dyno tested but apparently feels very good on the road in terms of boost recovery etc.

Hard to say when you don't have a full mod list and boost level/fuel type taken into consideration. I suspect the Kando is running more boost as at 130kph (well before the GT3076R would be choking) the Kando turbo is making more power. At 110kph the GT3076R has 60whp more...

Better the devil you know...

They don't, at least normally - GTX3071R is a different turbo though

The GTX3071R and GTX3076R both always have them

Awesome - looking forward to seeing how that goes, it is definitely what I was sold on until I saw the first results of the GTX mid frame turbos. Good luck, could be interesting

Interestingly one of the local track weapon (bendy stuff!) street cars where I live is an auto Supra with BPU, suspension, good semis and brake pads!

OK. For what its worth, I feel the difference (having had both) between a .63 and .82 is minimal - I run a .82 and don't feel robbed of down low, it has a very nice power delivery. If you are really that worried about a bit of a mix, just get an HKS GT3037 with .68 housing.

Lets put it a more logical way - why do you want to go with the Avo .73a/r housing when there is a housing option which is proven to get the most out of the GT3076R which comes with the turbo? For all I can tell you want to do it just because, because there is no logical reason I can think of. The turbo comes with the Garrett housing, its easy to get a dump pipe made up for it, and most importantly you KNOW its going to work. Not saying the Avo housing won't - but why take the more difficult and expensive option when there is a known quantity? It doesn't make sense to me.

Pump gas GT3582R .82a/r (magenta) versus EFR8374 .83a/r (green) - both T3 open housing on a K20A Honda motor running 1bar of boost - clearly doesn't need huge boost or fancy fuel to give gains, and no more lag.

Haha if I were building one it'd be going in an R33 GTR with LITH as the licence plate on it, I'd probably have won lotto, but you could get a ride if you came and visited NZ