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saturnine_07

Sprint 6 upgrade - GTX3582 or...?

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Gents

 

I have a Sprint 6 and am looking at doing some upgrades.

 

Goal is 400rwkw on 98. Given its a Sprint I'll keep stock airbox and crossover. Go with a stepped cooler, valve springs, head studs, pump, injectors, dump/exhaust etc.

 

To achieve 400rwkw on 98 I understand I'll need to do some turbo mods as the stock 3582 won't make the power.

 

I've been recommended going to a GTX3582. From my reading this turbo will make 400rwkw on 98 every day of the week.

 

This isn't going to be a drag-strip monster. I want it to be quick on the street off the line. I don't want to be waiting around for boost to come in later and get dusted by smaller turbo cars until I'm making bulk grunt at high speeds/powerskidding when a heap of boost comes in later.

 

My question is, are there better alternatives for a street driven car to achieve 400rwkw on 98?

 

Thanks for any advice.

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:Welcome2FordXR6t:

 

GTX3576R can make ~400kW on E85, the Gen2 version supposedly a bit over that and spools as fast as a stock FG XR6T GT3576R so would be close to 400 on 98.

 

but a stock GT3582R turbocharger can make 400kW at a stretch on 98, but it's at about it's limit.

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Thanks for the welcome.

 

Registered 13 years ago(!) and only just made my first post. Fair to say I'm a long-time-lurker. haha

 

yeah don't want to run E85 to hit 400rwkw and from what I've read on here, a GTX3576 won't get to 400rwkw. Most say somewhere between 350-380rwkw on 98 which is shy of my goal.

 

My only concern with going to the GTX3582 is that I've read on here a GTX3576R is a quicker street car off the line cause it gets up and boogies earlier in the RPM range.

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the difference between 380 and 400 isn't a huge amount especially if the turbo spools earlier.

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for sure, and in normal circumstances I'd be inclined towards the GTX3576 with the expectation that it has a greater area under the curve.

 

but my goal just has to be 400rwkw.

 

seems a huge jump between the GTX3576 at 350-380rwkw and then the GTX3582 at 500rwkw+

 

Isn't there a goldilocks turbo that sits inbetween?

Edited by saturnine_07

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There might be a precision turbo that fits in the middle somewhere nicely, but it's not easy to spec those as exactly as they're not as prevalent in the XR6T community. You can probably get a hybrid sort of GTX turbo.

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2 hours ago, saturnine_07 said:

but my goal just has to be 400rwkw.

 

Any particular reason if not running it down the strip.

 

The GTX3576 is definitely the "off the line" traffic light race turbo... especially if you aren't going to be racing people up over 130-140km.  Nobody is going to know if you have 380kw or 400kw.

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You might want to consider looking at Borg Warner turbos. They may have something you're looking for and are better quality than Precision. Pricey though from what I've heard. 

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yeah, Sprint's are numbered cars right? and the car is numbered in the low 400's... hence why I wanted roughly 400rwkw. Just feels right.

 

guess this is one of those cases where you can't have your cake and eat it too.

 

Thinking about this a bit differently...

 

How will a tuned GTX3582 compare to the standard GT3582 with regards to lag?

 

Anyone got any experience there? Given the GTX is newer tech I'd expect it to be slightly better? Thoughts?

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Gotta say, that's one of the wackiest reasons to draw the line at 400 that I've seen before haha

 

GTX is similar spool to the stock turbo, but a touch slower spool, especially depending on higher boost applications.

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I'm pretty sure there were a bunch of claims the GTX3582R was a faster spool than the GT3582R, but I never saw/felt it actually was, and the marketing hype dyed down a bit after a while and this claim seemed to drop off the radar, so yeah, I'm sure I meant the GTX3582R has a slightly slower spool (a few hundred RPM or so) than the GT3582R.

 

Of course the GT3576R and the GTX3576R with very similar spool (again within a few hundred RPM), are both better than the GT3582R and GTX3582R, but both 76's have limited top ends on the Barra as compared to the 82's.

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I've got a gen2 gtx3582r making 18psi by 3000rpm on my territory, if I roll onto it in third or so. It doesn't really go nuts until 3500 though. Further to add, if I just stomp it from a dig it will make 26psi in first gear by 4000rpm but driving along will make 21psi by 3100, so imho it's not too laggy, especially once you're moving.

 

This is probably as close to best case as you will get with that specific turbo, you might get a few hundred rpm earlier spool with a decent exhaust system. It's not kind to your drive-line or rods to bring it in that fast, so a lot of tunas will bring it in more gently.

 

If you're worried about lag then PCMTec has rolling antilag and launch antilag. You can leave with all the boost, or with the rolling antilag just build boost and let it rip!

 

#ZfLife

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Or try the new g35 900 from the new garret g series. Same size as the 3576 but should spool the same or better and hit mid 400s.

 

One other guy on the forums going to give it a try, pretty new for the falcon, currently only vband so probably have to buy a complete turbo and manifold. Ill keep my eye on it and hope it becomes a well worn path in a year or two with a few more fitment options.

 

If you have the sprint u could just give it a mild tune and leave it mostly stock. Hard to resist though I understand, but will be hard to find an unmolested one in the future.

 

Fwiw gtx3576 gen 2 on e85 have seen at 420, did a 10.8 quarter. Unsure its 98 figure, but the difference in my gen 1 is 43 up too so would be somehwere around 380, maybe less if not full exhaust.

 

Also pcmtec dont recommend holding launch control for too too long as it cooks your turbo

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yeah, it's a shame that anti-lag (this sort:

) is so bad for your turbo...

 

also, I very much doubt the G35-900 will spool as fast as a GT3576R, but you never know until it happens. Does have "promise", though.

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Haha I use mine nearly every time I take it out, but within sensible limits. I've set it up to make boost, not go ape shirt. It's also good for rolling decel keybangers through the city, if that's your thing :whistle:

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Stock gt3582 with mods will make 400 on 98 easy. Just need the right mods. Also need large supporting mods. I made 410rwkw on 98 and 480rwkw on E85 with factory turbo both 18psi.

 

I even made 400rwkw with 15psi  (98) on factory turbo with BF F6.

 

You dont need to upgrade , just modify and have large inter-cooler and intake. 

 

3576  run out of puff like emphysema

Edited by arronm

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sounds like some inflated hub figures haha 480 with a GT3582R haha... also 400rwkw with 98 at 15psi on a GT3582R, nah...

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Doubt it. It only was that low cause I run out of pump.  You just peanut butter and jealous cause I got the best tuner.   

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15psi just isn't enough to make 400rwkw on 98 on a Barra (on a chassis dyno)

 

480 is also higher than anything I've ever seen out of a non-modified and non-replaced turbo on a Barra.

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As I said, just because it's on a dyno sheet doesn't mean that the dyno wasn't set to make higher power (and your sheet is 100% from a hub dyno, it even says it on the sheet). Plus, saying "I have the tuner with the only billet block" means basically nothing as buying a billet block just requires enough money and inclination to spend enough money, not necessarily a thing that says "oh, my tuner can extract more power than anybody has ever done out of a un-modified GT3582R on a Barra"...

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3 minutes ago, k31th said:

"my tuner can extract more power than anybody has ever done out of a un-modified GT3582R on a Barra"...

 

This is true. Besides Nizpro, my tuner has the most R& D in AUS.  And I didnt say the turbo wasn't un - modified, just that it is factory.  With stock compressor and turbine wheels. 

 

Keith, your car doesnt even run.  You just cant see outside the box. Its not all what you see on forums. Go talk to some high end tuners and you will understand the differences. 

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