Lithium

By spot on do you mean more or less consistant with the other dyno types, or just consistant with other Dyno Dynamics set up for shootout mode? I have noticed that there seem to be occasional readings from DD dynos which seem similar to what I'd expect from a Dynapack.

Yeah this is the short of it, dynos are all over the place in readings - in Australia they seem to be all up the crapper as once I think I am starting to work it out a new strange result comes up. Dynapack, Dynojet etc used around the rest of the world have a bit of variance but they are all close enough to each other to get a rough idea. I am glad to hear you are running ~1.1bar, its about what I expected for the trap speeds you were running (as said in an earlier post) - so long as its on a turbo which can more or less support it thats what it should trap. On the dynos I run on for what its worth, I'd expect it to be making in the territory of 250rwkw with a crap load of torque.

Ahh ok, yeah so once you have paid freight + GST then they are equally expensive...

Haha I'm not sure if you are joking or not, I knew someone who had that honest opinion. If you went from your RB20 to an RB25, do you think you'd suddenly not try and milk everything it has to give? You've done an awesome job of making RB20s look better relative to its RB25/26 cousins than it should do - I credit you and your car setup more than the engine, makes me wonder how you'd go with a decent RB25 or 30 The dyno plot you have used there doesn't really show anything, all I get from it is you have a different tyre speed vs revs to the other two cars and are probably running more boost. Australia, for heavens sake - get some hub dynos!!

Very true, actually. Best of both worlds!! Either way, Mark's car as clearly well up to the task of giving the HT lads a good run for their money in a race - he's gone quicker than the HKS R33 could do on Willowbank. If there is ever going to be an event with both there, I will travel to see it!

I wasn't talking about the dyno power, I am thinking of almost completely disregarding Oz dyno results - they mess with my head. Now I am just talking about outright modifications, trap speed sounds like it'd be a better measure of what the engine and car is doing that trying to work out what on earth the different between your dynos and everyone elses is, I just want to know if his car is doing substantially more than what 220rwkw means to me if that makes sense? My car has run in the same kind of territory trap speed wise, running ~14psi through a GT30R on a completely stock RB25DET on a fairly slippery strip (actually an airfield...) but makes much more than 220rwkw on the dyno I run my car on, well actually ALL of the ones I have run it on which includes a rolling road dyno it made 260rwkw on. What I am hoping to hear is that my car for the mods it has that the times/trap speeds in the conditions aren't TOO bad.

I am in NZ, a mate of mine was running a Turbonetics T66 on his GTS4 for quite some time and it did hold on fine until he blew his motor and the oil got contaminated and stuffed the turbo. It was quite impressively laggy given it was on a 3litre, though granted it was a plain bearing/non GTK version. I'm surprised to hear they are potentially competitively price in Oz as here they are really expensive, probably part of the reason they are never used. Its interesting that in their country of origin hardly anyone seems to use them either if you look through specs of all their time attack and top drag cars.

The power estimates mate on here have me confounded - ~220rwkw seems to be the accepted approximate power for an R33 running 114-115mph? What is done to your car? On our dynos (well most dynos around the world) 220rwkw is achieveable at a stretch on a stock turbo but trap speeds >114mph are very much not achieveable with the stock turbo on an R33. To be running those kinds of times/speeds I'd be hoping to see you are running around 1bar of boost, maybe a fraction more otherwise I am about to get very depressed.

It doesn't close the gap at the top end... I overlayed a mate of mine's 205rwkw R32 GTSt dyno plot with my 280rwkw dyno plot from the same dyno. The R32 was running equivalent mods to mine (bigger turbo, ECU, injectors etc) but with more boost. His lag was about the same, and if anywhere the gap "closed" in the midrange which is probably mostly to do with the larger amount of boost - my dyno plot actually pulled noticeable distance away from his one above 6000rpm. Despite the hype, in my experience when you go a bigger turbo etc on an RB25 they rev harder than RB20s too, and still don't need to.

Innovative turbo HAD a website with information on those turbos but it seems to no longer exist, if its an 80mm inducer then thats way huge by most vaguely sane people's standards for a street car. It will be floating in the flow capacity area of the kind of turbos two of the fastest GTRs in the world (ie, mid/high 7s cars) are running, and also lag.

Haha I am in a bit of a pickle here, I love seeing these guys go quicker but between the fact I have watched Reece McGregor gradually go faster since 1998 and the fact that Heat Treatments are from NZ I feel a certain amount of compulsion to cheer them on too - so I'll keep cheering, but quietly hope the 7.57s mark doesn't get cracked until HT are racing again haha.

Shame they are way more laggy and expensive than the Garrett GT series, at least they are pretty and strong

Yeah it seems they are programmed into thinking that a good single turbo which isn't suited for >700hp is too small for a GTR, I guess it allows the "twin low mount" purists reason to believe that big singles are laggy. The reality is a GT3076R feels at least as good under foot than the stock R32 GTR ones yet is capable of substantially more power too - if you were going to go for an upgrade focussing on response with a measureable amount more power, a single GT30R I reckon would be the dogs bollux on a GTR. Don't tell a person about to drive it that its running a single instead of a pair of little twins and I doubt they'd work it out, aaside of course from the fact that a pair of GT-SS don't have a angry little anti-surge whistle haha.

I'd say you should indeed run screaming, sounds dodgey as all hell and doesn't look like the genuine Garrett engraved A/R 70" compressor housing. It looks like its supposed to appear to be a Garrett "T04Z", but putting "Precision", "Turbonetics", and then to top it off "Borg Warner" which just are not Garrett related at all just reasons my suspicions a tad.

You'll find if you search for GT42R/GT42RS/GT4202R cars will sound suspiciously similar

Yeah, I'd be tempted to try and roll with a .78a/r GT3076R...

Yeah mentioned them earlier in the thread when "GT45xx" based turbos came up.. they are pretty new and will probably be a pretty limited run. There is a drag GTR in the UK which is having one installed and should be doing some runs with it in the near future, same car did an 8.2 with a T51R Kai so should be very interesting to see what it does with something this substantial.

Very very very very nice! Good consistant times there, love hearing about it - it was driving me crazy that all the reports of the Jamboree I heard didn't include your times even though it appeared you were there. What tyres are you running on it these days? I know you got very fast on the drag radials but not sure at what point (if?) you went to a full slick.

I'm not recommending this, but just showing it for interests sake: http://www.draganddrift.co.uk/photos/rick_...ug16_051745.jpg

Holy crap, sorry my bad- I had assumed going by how often people mess up and quote incorrectly (and its way more often than not) I thought you may have just miss spelt or been misinformed. Ok thats an awefully neat little turbo there which I wasn't aware of, yes - very very T51R SPLish. Nice! Learn of something new every day.

OK a GT4508R is quite different from a T51R SPL, HKS have only JUST released a turbo comparative to the GT4508R and that is the T62R which they showed the prototype of at the last TAS. A T51R SPL is so similar to a GT4202R that there is no point in my opinion in paying the extra for the T51R. A chap I know has run a T51R SPL and a GT4202R on very very similar engine setups and he got slightly more power out of the GT4202R and both seem very similar spool - the GT4202R setup was on a manual trans car vs auto for the T51R. In both cases I believe the turbos had been run to the point they weren't going to really make any more power (around 1000hp). The car that had the T51R SPL on it is in the process of getting upgraded to a GT4508R, will be very interesting to see the results of that.

I have no idea what they are going on about with the "Garrett T51R" thing, sick of inbetweeners making up random names and confusing people with them. The closest I know of to a T51R is a Garrett GT4202R, nice turbo. GT4202Rs sound exactly the same, dirty big turbo with anti-surge housings will do it every time

Thats crazy, I would be clutching at straws really to give anything haha. Is there ANYTHING else about the setup that you think you could share? What kind of air filter were you running? Its a bit weird there isn't obvious pitting/strange shape in the piston - ones I have seen from lean run or det are usually a lot less "smooth" than that, its almost like its been machined and I'm sure you'd have mentioned if the spark plugs had melted or anything like that. Its rather odd. The more I think about it, the more I think its gotta have been detonation.... did you have knock mic on it etc when tuning?

It most definitely is one, congrats on acquiring a very nice turbo

Haha there was a huge thread on a GTR UK forum about this, people saying flat that either its not running the GT2860-5s, its running nitrous as well, or it never ran the time because its impossible on those turbos. With race gas, a good setup, and good tuning its clearly possible FYI, there is no such thing as GT2860-10s, its a name given to GT2871Rs which can be "bolton on" by someone who doesn't get it in my opinion. By Garretts own naming the "60" part of GT2860 refers to the exducer size of the compressor wheel, which with the "-10s" is 71mm. They're actually an equivalent of HKS GT-RSs (instead of GT2540s)... my best assumption is that some people call them GT2860-10s because the suffix of the part# is "-10" even though its a completely different family and also the fact that its a bolt on upgrade for the GTR and looks externally pretty similar. They'd be a wicked turbo for a high-power low mount GTR, basically what DirtGarage has on his R32.