Lithium

A lad I know uses a GT3586HTA on his RB30DET GTSt track car, very very quick around the track - from memory around 460kw @ wheels or so on ~21psi... limited by injectors on 30% eth.

I have no doubt the PT6262 will make more power, its a bigger compressor wheel - there is no magic. A more comparable unit would be the FP GT3586HTA... except that thing is just completely ridiculous in terms of what it makes: http://store.forcedperformance.net/merchant2/merchant.mvc?Screen=PROD&Store_Code=FP&Product_Code=NTGT3586HTA&Category_Code=Turbo-FP

It was a Honda

All this E85 talk makes it sound like you can't put a Garrett equivalent on a car and crank the boost up something mightily - its a bit unfair using a fuel you can get way more power out of the same airflow of and saying thats because the turbo allows you to. The reason you are getting more out of a smaller turbo isn't that the turbo is (necessarily) more efficient, its all about the air. To be funny I have tried to convince a mate of mine that he should upgrade the stock injectors on his stock turbo R33 and put an ECU in it and let me tune it on E85 before he upgrades the turbo as well and post the result on here just to see how flamed we get for suggesting the result is possible. I reckon it'd made for a ridiculous looking power curve... The funny thing is YEARS ago I selected the GT3076R after researching all over the show and the numbers being thrown around here are numbers which the GT30Rs made using E85/C16/other equivalent high octane fuel way back in the day. 410kw @ hubs is the highest I can recall from a .82a/r GT3076R fwiw, maxed out on that particular setup - done by Evans tuning in the states back in 2005 who aren't "f*ck with the dyno settings to make it look good" cowboys, done obviously using good fuel. Hopefully I can refer to that now without getting the same response I did 5 years ago. Does the PT5557 do more?

That was what I'd wanted to hear for ages, the PT turbos people brag about are with masses of boost and E85/whatever - I've never heard a stand out figure on pump gas. Seems that remains to be the case. Same goes for the FP HTA turbos really, I hope the new Borg Warner EFR and Garrett GTX turbos live up to their hype a bit more as most people will be running pump gas, one would assume that with the bigger advertised compressor maps they actually are able to genuinely pump more air.

When you go high mount you tend to need more than just a manifold to make it work... also having external wastegate would be a good start

I have pretty high hopes for the GTX3071R, they look like they could make for an unreal setup on an RB25... especially with a twinscroll hotside. Be amazing

Area / Radius ratio - just throwing that out there

LOL I was clearly having a bad day, cheers for clearing that up Geoff - my bad. I actually thought that was engine dyno results, not Mustang dyno.... that makes a HUGE difference to how I look at those results too. Very very very nice work, and that makes much more sense

Bigger displacement improves spool AND adds torque for a given boost level, if the 2.2 setup was equal spool to the 2litre it would still look substantially better. Twin scroll helps spool a bit more, as well as midrange torque, trying a new set of cams from their best setup doesn't means its gong to be shit, and the Precision turbo is at wheels compared with engine dyno for the BW. Would like to hear some driving impressions or see more results of course.

Of course a 3litre will do well, I'm not convinced that the spool (at least in that case) is much better than a GT4088R which will also make that power piece of piss. 4G63s push turbos very nicely! To put it into perspective, here's a dyno plot from an open housing Precision turbo on a 2litre EVO showing a not heap worst spool - this is at the wheels btw (granted the EFR was hopefully not at its limit): Imagine the same thing on a 2.2litre would even up the spool quite happily... and a twin scroll housing, who knows.

Yeah sorry I should have clarified that it was the lag which didn't impress me too much, making a bunch of power isn't what I am specifically looking for - more how it gets there and holds it. That torque curve climbs with a hiss and a roar (that starts building at 4000rpm - fairly late) and then drops off.

Engine horsepower, on a race engine running race gas at 32psi - a standard issue GT3582R will give that a good crack and spool substantially quicker, something like a PT6262 would probably make it look a bit lacking.

You seem to be missing the point. The point of using the dyno is to make your car run optimally, a big or small number doesn't necessarily mean anything

I'm not worried, if you are happy with it then godspeed. Try it out at the drags, only way to know how it goes.

Take it to Nightspeed at Meremere on Friday night and find out, or even better Nizfest drags on Sunday Given you haven't had the car itself tuned, much less had it on a dyno... anyone could guess. I certainly wouldn't be going claiming a power figure as you are at the moment. I'm not really convinced its a good idea running a chip tune some random put together without knowing your car.

As excited as I was about these, the first dyno plot I have seen for one isn't knocking my socks off - this is from the Sierra Sierra EVO running the EFR8374:

I would say it would go over 350kw, GT3076Rs have gone over that and this has more pumping ability...

Haha thats a different kettle fish isn't it? I didn't mean that, I was actually referring to the catch phrase the new black

Bigmikespec - I think the thing about these turbos is that for a given size the spool/response should be a little better (ie, EFR8374 equal or better than a GT3582R in spool) but flow like a GT4088R or a T04Z... so if you are matching for a given power level you could argueably have a far far more responsive turbo than previously. Take this unit: http://www.full-race.com/store/turbos/borg...6758-turbo.html Flows somewhere between a Garrett GT3071R and Garrett GT3076R with a turbo that would be more comparable packaging (and potentially response) wise to an HKS GT-RS. For the people who get all wussy about GT30 spool when aiming for 250+rwkw, this could be a bit of a "new black" option. Crikey, in what kind of conditions?

Of course, but I would suspect it has got to be partly to do with it given they'd been whittling down to match HKS' time previously then suddenly are able to knock another couple of seconds off.

Yeah EFR7064 should be the equivalent of GT3076R

Wouldn't it either hardly spin, or spin very noisely? The stuffed BB cores I've heard are quite "clicky"

You have a Link now eh? I've popped an intercooler hose completely off with Moby and it drove fine, just never hit positive pressure. There was nothing at all to indicate anything was up other than that. Different story if you have an ECU which relies on an airflow meter however. Did you try what I mentioned above? Start it with the intake pipe off the turbo- make sure there is no way of any shit going in there. If the turbo spins, that's not your problem. Easiest way to rule that out. It should even twitch in desire to go just from cranking...

Hey Byron - thats no good. Have you idled it with the inlet pipe off the turbo to see if its actually spinning from exhaust flow? Seeing as you had your filter off it should be pretty easy to test, that should rule out any rotating assembly issues. I'd think something on your intake side has given up...