Lithium

The GTW range is the budget performance series, they are effectively revamped Garrett T-series turbos with "GTW" compressor wheels replacing the old compressors. They go well enough but are pretty much Garretts equivalent to the Precision and FP turbos which were available 8 years ago.

I'll point out (unless I am missing something) what should be relatively obvious on this, with equivalent for equivalent ITB vs single throttle plenums (same runner length, same plenum size and design) the power delivery should be pretty much identical as once the throttle is wide open everything should be much of a muchness. Any differences are likely to be in the behaviour at throttle transitions.

Ahh ok, yeah could have been a thing to muddy things a bit. Still, it's a lot of power in any money - and I'm not sure a 6870 would make 1100hp @ hubs haha

Oh interesting - I guess I shouldn't be surprised, but a few Mainline lads have implied that the Dynapacks read a lot higher and I just went with that. I wouldn't have expected the R35 coils to make much difference unless your spark was only just (or not) holding up before.

Nice, be interested to see the results So far they've been pretty good for us, especially if using a Kevlar belt on higher rpm setups though probably not really an issue for you haha

RB26 Head? Will you be getting an E85 tune? Looks like it's holding power quite well to redline currently, will be interesting to see it does with more stable triggering. There is an outfit in NZ who do a very affordable cam trigger setup (but not using the flimsy stock Nissan drive) which fixes this kind of thing with the stock cam angle sensor configuration without going 10/10ths on a crank trigger setup, if you haven't gone there yet and were wanting a reliable trigger setup without going 4 digit costs.

Yeah it's a bit tricky when two turbos being compared have fairly different flow potentials, it's pretty misleading if it's not made really clear that the "laggier" turbo actually is operating below it's potential to make that power while the "awesome powerband" turbo is probably sitting near it's limit to achieve the same thing. On the flipside, 200-300 sounds pretty generous - >840 @ hubs is not messing about, the Mainline hub dynos don't seem as "happy" as the Dynapacks.

Awesome, I'd have thought the 1.45 would be more appropriate but that still seems to be pumping out quite a bit of power even with the "smaller" housing.

Nice- fair to assume the blue line is the EFR9174? Any idea of which housing on the EFR? Interesting seeing the progression - Garrett > Precision > Borg Warner EFR. Be interesting to see if he stays with this now.

Can't promise anything but will mention it. Where do you get an 8370!? Never heard of such a combo

So its like a Borg Warner S300SX 8375 or something - 60mm turbo? I'll mention it to Kiwis who may want a 9174, you have the 1.05 hot side?

You mean downgraded to something better matched to what you wanted? The 9174 was laggier than the old Airwerks ?

Did you actually get it tuned ? What have you replaced it with ?

There is no fixed rule, sorry. Depends on how far off the current tune is for it etc - the actual boost threshold is unlikely to change much unless there is something mechanically (cam timing/wastegate/leaks) making it laggier than it should be. What exhaust housing is it running? What was the previous setup, or should I say - what tune it is running on if it's not tuned for this setup? If it's completely untuned then I would take anything of how it drives with a grain of salt, and really not be driving it at all.

Yeah obviously - though the power to pull high 140mph trap speeds is no joke! Funny, I was reading a thread with someone running a 6466 on a Supra and "on kill" they ran a few mid/high 9s at high 140mph traps before snapping a turbine shaft. Your 6262 is punching high!

How are you finding it on the 2.8? Must be pretty perky at that power level

I haven't heard anything beyond what is already in here, I'd definitely update the thread if I have information which I'd be able to share.

I stuck up for it and am pretty much the ambassador for EFRs here lol

Yes.. A rather mysterious Piglet has been keeping me up to date on the bacon you've been making. Absolutely huge effort - I am blown away... There is so much to be impressed with in regards to that result. How confident are you that the same parts list you have would achieve the sake results?

Those guys have done that quite a bit, they're often mega vague with details and the more interesting results - I'm surprised they even said what turbos are on it to be honest.

Surprised it hasn't been mentioned yet, but the original post that video is from specifically mentions that it's during tuning - ie, that's not a full power run. I'm not sure why they didn't show an "all in" run, or say what the final power was but the implication from the guy whose car it is has very much been that this isn't the power it's capable of.

Nice - what setup do you have that on? How is performance?

The 0.80a/r EFR7163 hot side flows the same as the .83a/r T3 EFR7064 hotside, and the .85a/r EFR7163 flows the same as the .92 EFR7064. That dirty old mixed-flow turbine isn't a terrible thing.

I'd stick with stock or at least really mild cams - the likes of @Piggaz have had pretty good results from UE high lift low duration cams on fairly serious setups, they would be very easy to overlook and are very drivable.

I feel like I'm missing something, why are you guys implying this is a disappointing result? I doubt that's on kill, it's not on E85 and it's not given anything away to the GTX3071R (which is a very proven performer on RB25s) but picked a lot up in spool - despite using the bigger housing, which would be more suited to the 660 compressor on a 2litre. Where has it gone wrong?