Lithium

Thanks for sharing this stuff Anthony, I'm always on the look out for options - I've mainly tuned and recommended Links so far but always on the look out for other options, especially if competitively priced. I've joined up on the Adaptronic forum and about to start trolling posts to get a bit more of a picture

Awesome - sounds good, so it has met your expectations without even leaning on it then? Hope the power delivery/response is good too I had figured it could be good for 450kw+ @ hubs on the right setup, but Dyno Dynamics are a bit of a mystery to me - never had any direct exposure to them so really I wasn't sure what to expect on one of those, though I had expected 370kw should be pretty doable. Wow so it's not going to be driven at all until race day? No pressure Hope it all goes well!

Any news?

Wow that is hell impressive, be interesting to see if any solid theories arise

Lol why such a confrontational post? And what fuel, and how much Nos?

Have you checked thoroughly for boost leaks?

I don't know if you guys got the 4G63 Mitsubishi VR4s, but they were all the rage in the late 90s/early 2000s here and there was a trick where you could "swap the hoses" which really looking back was probably just messing up the feed to the wastegate and potentially freeboosting them. Typically only done for "drags" and I actually don't know anyone who melted an engine doing this, and the intended result was always reached - they went HEAPS better when this well considered mod was performed. I think one of the guys cracked into the 11s with one just by stripping it out, upgrading the fuel pump, putting some AVGas in the tank and giving it the freest flowing exhaust they could. Similar to the other mods mentioned here - there was a spate of guys who turbocharged their Hondas back then too, typically making up a shitty exhaust manifold, attaching an EVO or WRX turbocharger, a cheap intercooler, retarding the timing slightly and hooking up an extra injector in the intake which is triggered by a pressure sensor. Again these lasted surprisingly well! On the flipside I remember back in these days (we're talking mid/late 90s) realising I maybe didn't fit into the V8 world of the day as well as I fit in with Japanese tuning - I had what actually turned into a fairly heated arguement (yay bourbon) about intercoolers being a gimmick. The V8 guys (and actually quite a few people general car people) were CONVINCED that they were just a passing ricer fad and if anything they cost power, and generally anyone that condoned it or did it were retarded. Its quite interesting watching tuning ideas and understanding evolve over the years

Nice, sounds on the money to me. I did 13.3 @ 112mph off a 2.2s 60ft with a bit less power on street tyres on an airstrip with my GT3076R. Put stickier tyres on it and ran 12.6 @ 112mph off a 1.9s 60ft (same strip, same driver... I was still learning how to make it work, not great traction) - it took me low 2.0s 60fts to get into the 12s from memory so not far away.

A guy in the Audi world (I think?) tried an HTA3073 out and felt it spooled at least as well as a GTX3071R - no dyno results for it as yet though, the only single turbo HTA3071 results I have seen are this: http://www.seatcupra.net/forums/showthread.php?t=251783 Equates to 310kw @ wheels on pump gas.... I must add that it seems a good amount of the high power GTRs (and the workshops that produce them) seem to consider the HTA turbos as the units of choice for R35 upgrades, though a lot of the companies that sell them just advertise them as "custom Garrett"... one of the tuners said that all but 1 (or 2?) of the 8s R35 GTRs in the world are currently running FP HTA turbos. They are also very common in twin turbo form on Porsches

Wow that sucks! What a way to get used to a new setup (or entire new car?)! Good luck getting it all sorted and racing

Sweet Sorry for millions of questions - curiousity is a bit of a vice with me.

How did that go? I saw in another thread that the 119-122mph trap speeds for for 800m - not 400... that explains a lot!

Oh yeah, they seem to go for around $1400USD - comparable with a GTX2867R.

What was the reason for the change?

Ahh yep gotcha. And no, not like to find any RB25 results for them. You'd need a T25 manifold to fit an EFR6758 onto an RB25 - and really imho it is too small (I feel the same thing about GT2535 and GT-RS turbos as well) but it would spool like a maniac, and I'd say 300kw on E85 would be achievable. I have not seen enough information on how well the trimmed GT30 turbine works, the GT2835 was a pretty popular choice so I assume it was pretty good - in the case of the GT2835/67mmGTX Frankenstein I am going to go tentatively with Discopotato on this one and say it could be a hell of a match up on an RB25. I'll roll with the idea that it is a little larger than the GT28 hotside I hate so much on RB25s, and the 67mm GTX compressor requires a reasonable amount higher shaft speed than the 71mm GT compressor to move the same amount of air which perhaps will work well in regards to the fact the turbine wheel will also spin faster.... I still prefer the idea of going a whole GT30 turbine, I like the way they drive and have in the past wondered if there are a bunch of GT30 cars which have been tuned averagely in the partial throttle areas or something as it comes across like everyone think they are dead at low rpms.

It's easy to make an HKS GT-RS look silly in every way, simply move away from the Garrett/HKS catalog and put an EFR6758 on there to IMPROVE on the spool over the GTRS and make more power up top - or go a twin scroll EFR7163 to have similar drive from down low, more torque per psi, more response and much more power. It will not be cheap, but you'll end up with a response monster! DP is very knowledgeable on Garrett/HKS turbos but don't confuse the fact he talks heaps about it with the fact he knows infinitely more than those around him, he is just passionate (which is fine, I am too but just don't have as much time or inclination to write big rants these days). So yeah, don't ignore everyone else - there are plenty who have knowledge or experience which he might not and it sounds like you want to do push forth with this quite hard and there is more out there than Garrett.

Very interested to hear how both results turn out - 30psi all around eh? The GT3076R-HTA on an RB25 compared with EFR6258s on an RB28 with fuel and boost will be interesting to compare drives/results too.

Argh Brad - I see why you asked about VE, when I said you had a fail with VE plotting I meant compressor efficiency... my bad. Wow. This result is on E85 and stock displacement RB26 right? That should be a bunch of fun - glad they are working better for you now! By the way, you have some intensely awesome toys - I've been waiting with eager anticipation for the HTA GT3076R and mid way through the anticipated you out of the blue post something which I'd be looking forward to just as much... good man Cheers for sharing the goodness!

How much of that do you think is to do with the fancy 1" runner manifold - or really, how do you think that manifold would affect something like a GT30R's driveability?

Agreed, not even sure he would need the manifold. Curious, why is does the new dyno run finish so much earlier?

Haven't tuned such a setup yet, which is why I mentioned all cases aren't equal - but I specifically mentioned that the cases I'd seen those gains were with no more boost.

Aside from this, yeah - nothing useful: http://www.atpturbo.com/mm5/merchant.mvc?Screen=PROD&Store_Code=tp&Product_Code=ATP-HSG-038&Category_Code=GTH

I have no idea what to expect. I don't know how people in Oz have fared with the GTX28 series turbos but someone local put a GTX2863R onto an SR20VE+T and made 301kw @ hubs on BP98 with full boost at 3500rpm - which is a hell of a result imho, even if the numbers wouldn't be so impressive on a DD (I would expect this to equate to >260rwkw still). Point of that comment is that at that rate the GT28 turbine housing would be becoming the limiting factor, I'm amazed they got that power and am wondering if it is due to the higher shaft speed the 63mm compressor would require to move that air allowing the turbine wheel to move more gas too or some other quirk of the combo. Fact is the 63mm compressor delivers way better than I would have expected - 301kw on that dyno is GOOD power so in hearing that result and the fact that it should be safe to assume the 67mm compressor will deliver more, and the GT30 hotside will let it clear it's throat with no issue whatsoever... so this turbo will actually make quite respectable power. My opinion - this turbo should eliminate the GTRS/GT2871R from any consideration on RB25s. If someone wants to fit the smallest practical turbo on and still sensibly upgrade the stock RB25 turbo - this would be it.

What ECU and injectors do you have? If you aren't after monster power and mostly happy with what you have but just want to up it a bit and you have the ECU and fuel system to support it this is what I'd do: a) Tune it on E85 - raise the boost until it is clear you are starting to lean on the turbo, don't let it totally max out or anything - just go to the point it's obviously going past it's best from there. If that is still only 14-15psi at peak power, so be it. A reasonable tuner will be able to see the VE curve at that boost level isn't holding up like it was when the turbo wasn't maxing out imho. b) Take stock of the injector duty cycle at peak power - this will also give a reasonable idea of how much pumping the turbo is doing. c) Decide what the most boost you want to run on the engine you have d) Calculate a new boost curve based off how much head room you have in injector duty cycle - clip it by your maximum boost level, then adjust the boost curve to suit. If you choose 21psi as your max then you may end up with a boost curve which holds 21psi up to 5000rpm then gradually drops down to 14psi at 6400rpm. e) Tune to suit the new boost curve, profit! This way you should potentially be able to avoid making the turbo dropping boost of it's own accord so it isn't killing itself to do what you want it to do, you should be able to deliver power like a car making >270kw on an RB25 through much of the rev range, and TBH I reckon there is a reasonable chance you'd be able to make 270kw on E85. I've done this with a car before and driving the car on the initial flat boost curve and comparing it with the "new" boost curve (was avoiding maxing out turbo and injectors in this case) the car felt like a totally different beast - much much quicker and more fun to drive, despite making exactly the same peak power. If I was given a car previously tuned to 235kw on 14psi and asked to retune on E85 then I'd be thinking to myself that there was a good chance it was about to go over 270kw but there are always variables and you can never know till you've tried it. For what it's worth I've tuned a RB20DET which had a knock limited 240kw @ wheels on BP98 to make 295kw @ wheels on "E33" at the exact same boost level - no other changes at all. Knock limited setups are where ethanol comes into it's own. If you're thinking about doing an upgrade have a good think about what you are willing to live with next!