turismo

iTrader: (33)

I really thought about selling my kit for another for more power(700+). But then I started thinking about the 1820 turbos that subarus usually use as an upgrade. These are rated at 450hp and uses the same flange as the PE kit. Has anyone done an upgrade or know if it would fit. I am in the process of building a shortblock and want to put them when my motor is out. Anyifo would be appreciated. O btw, if they will not fit are there any other upgrades.

vq35carel

Contact PE they will sell you bigger turbos 4 the 350z .it may take a little conviencing though. but i do know they have them

Philthy

iTrader: (3)

Garrett GT28R's will mount directly to the PE Cast Manifolds - 900whp will not be an issue

The big problem is Traction on a street car - I'm seriously considering going back to the stock PE turbos that came in the kit where I was making 650whp, and 562ftlbs at 3k rpms... Traction was still silly, but it was easier to handle on the street.

turismo

iTrader: (33)

I was looking at the specs of the gt28r and it seems like it flows about the same as the IHI 1420's. Do you think it would be wise to upgrade?

RageWoRX

Philty its Loux I sent you a PM regarding the turbos .. you might want to look it over

-Jon

Chebosto

iTrader: (43)

bump for updates

chimmike

iTrader: (7)

a GT28R doesn't flow near enough to make 450whp.......neither does a GT28RS man........so how do you figure 2 of them will make 900whp?

turismo

iTrader: (33)

Thats what I was thinking!

Philthy

iTrader: (3)

lol - simple, bigger titanium wheels... I should have mentioned that I had them tweaked.

chimmike

iTrader: (7)

for one thing, titanium wheels on a turbo? That's not very common, and there's probably a reason for that.

Another thing, the basic reason a turbo is called what it is is because of the wheel sizes. a GT28RS is different from a GT28R because of the wheel sizes, etc.

So, if you give me some specifics on the wheels we can determine what those turbos REALLY are......hell, you can't even FLOW 450whp thru those housings, so no, it's not simple.

Philthy

iTrader: (3)

If this is news to you that you can use a titanium aluminide wheel in a turbo, then I’m just going to stop having this conversation with you because obviously I'm being attacked by someone whom is not well informed.

Here's as much detail as I'm willing to give out at this point because my tuner may want to offer these turbos as an upgrade in the near future. The physical dimensions of the turbos are that of a 28R with a 71R size wheel. How was this accomplished, like all turbo mods with larger wheels - machining of the housing and backing plate.

In the future feel free to PM if you want more detail, I’m always willing to help people out if I have something to offer – trying to call me out in this manner isn’t cool and really doesn’t motivate me to offer information.

RageWoRX

I agree with Philty ...... not really that unheard of a process. Newer design turbos are now using , Inconel, Titanium, and Billet Aluminum compressor wheels. Also the process of modifing the housings (compressor usally) for fitment of a larger wheel is also not a new concept ... infact its how people like Jerry at Deadbolt make a living.

The GT28R uses the same exact compressor housing (just different internal machining) as the GT2871R,GT2835/37, and the GT28RS. Its actually a much larger housing than it needs to be for a regular GT28R and this is done so that different versions of the GT28 can be made (ie the 71R,37,35, and etc) without having to have a different housing for each turbo meaning its a modular design to the rest of the GT28 family. And yes a GT2871R will flow enough for 400+ whp each. I believe the GT2871R measured in at around 660 cfm @14.7 psi. Also it would depend on which exhaust side is choosen for the GT28XX 0.63 or 0.82.

So Yes twin GT2871Rs will get the job done and spool great with the new Ti wheels

Sooo I'm also failing to see what the issue is here.

-Jon

chimmike

iTrader: (7)

a 2871R will never flow enough for 400whp, even on a good day, Hence where the 3071R comes in. The t2 turbine housing is simply TOO SMALL for that kind of flow, it's been proven over and over in every other turbo community.

minimum for 900whp in my mind, for twins, would be straight gt3071R's. And that'd be pushing each turbo pretty hard, too.

Claiming you have GT28Rs in the car when they're in fact 2871R's makes a pretty damn big difference in what the turbo really is. Aside from the fact that, unless I see proof of a 2871 powered car making 900whp, I refuse to believe it. So if it's out there, prove me wrong. Otherwise, I wouldn't be foolish enough to use those two turbos if my power goals were that high.

Sharif@Forged

iTrader: (92)

Everyone wants an upgrade path, that provides for a direct bolt-on situation, especially given the tight confines of the VQ35 engine bay. It is very common for people to upgrade wheels, and machine housing, but retain the outside physical dimensions of the turbocharger. In fact, I just did this on my twin Greddy setup. My TD05H-18G's, were just converted to a TD06H-60-1. These turbos should easily flow enough air, for 900whp, and probably much more. At just 14.7psi pressure (2 bar pressure ratio), they will flow about 57lb/min worth of air..EACH.

Philthy

iTrader: (3)

Listen, I have nothing to prove to you and I could care less what you choose to believe... People said that you couldn't make 550whp on the stock PE turbos, yet we made over 650whp... I would go into detail on my mods, but it would be a waste of time talking to a person that doesn't even know that a titanium aluminide wheel in a turbo is a good thing.

Have a nice day!

RageWoRX

Ummm what is the issue here ... people with 2.0L SR20s and 1.8L B-Series Honda's have put down over 400+ whp with a SINGLE GT2871R man. Infact Enjuku racings new Drift car just put down 450+ whp with a single GT2871R with the stock 2.0L displacment so theres some local numbers for you ... I know your a FL guy so you know of Enjuku I'm sure.

Chimmike ..... Look at the flow data (all my flow numbers are averages at around 65-80% eff) on the GT2871R like I said it flows around 660 cfm @ 14.7 psi and hell even a GT2835 will flow around 580 cfm which if you compare it to other turbos like let say an 18G that flows just about 600 cfm @ 14.7 psi or Hell even a 20G that flows around 650+ cfm @ 14.7 .... so just try and tell me that a 20G can't flow 400+ whp hell even an 18G can flow close to enough for 400 whp each and it flows quite a bit less than the GT2871R ....... So as You can plainly see (or at least I hope) that 400 whp or more is NOT A PROBLEM for a GT2871R at all.

And for some reason you seem to think ALL GT30s flow sooooooooo much more than ANY GT28 series turbo (yes I realize the housings are bigger) .. why because 30 is a higher number than 28 ??? LOL.

Again look at some flow data and some GT25,28,30, and 35 family examples (again all my flow numbers are averages at around 65-80% eff). A GT3037 (a very popular turbo) in which easliy flows enough for even AWD cars to put down 400+ awhp with a much higher drivetrain % loss (evos stis) ... well guess what the GT3037 flows a Huge 670 cfm @ around 2 bar .... a whole 10 cfm higher than what the GT2871R flows now thats a HUGE difference right.

Now lets look at the mighty GT-35R guess what it clocks in at 820 @ 14.7 psi !!!! a turbo that has been know to put down over 700+ awhp on AWD cars doesn't even flow really that much more.

Ok now lets look at something from the TINY GT25 family ... the GT2540 (don't really like the turbo its a weird compressor side / AR combo but) it clocks in at around 590-600 cfm @ 2bar now wait that can't be right its only a GT25 how can that be ??????

Sooo again for the last time the GT28 series compressor housing setup correctly can flow 400+ whp and over 450+ crank hp without any problems.

I don't know where your getting your info ... but you might want to re-think some of the things that your stating because they are just flat out wrong.

Titanium compressor wheels Blahhhh that is science fiction that doesn't exist .... please how can you not know about this

I have posted actual data showing why I feel this is possible ... you have nothing but your opinions.

GOD all these numbers .... what do they mean LOL ????

I'm not trying to make this an argument .... since I don't really see the need to argue this issue anymore.

The only thing that is left is for someone to put down 800+ whp with twin GT2871Rs .... and I don't think Philty will have an issue with that ........ then there is no dicussion needed ...... but you can still stick by your unfounded opinions.

Thats it for me because no matter what your response is it won't be worth my time or energy.


-Jon

MIAPLAYA

iTrader: (3)

Hmm me thinks that if you put a larger compressor wheel into a GT2871 turbo its no longer a GT2871. But hey what do I know. BTW I know several guys running a GT28RS at 14-17 PSI of boost on built motors with all the good stuff (cams, etc) that don't make 400 WHP. In fact most if not all make right about 340-360 WHP. Of course there are tons of other factors involved which I did not state but then again neither did you. So my question remains, if you put a larger compressor wheel on a GT28RS and milled out the housing how do you still consider this a GT2871. If I misread then excuse my post..

RageWoRX

Its still a GT28 compressor housing yup the same housing just a larger diameter wheel and machined/setup for it. The GT2871R is named that because it is still in the GT28XX family of turbos.

a GT2871R with a 56 trim wheel has a compressor inducer measuring 53.13mm and an exducer of 71mm. That is why its still technically a GT28XX turbo.

And I agree ... 400 whp is almost impossible on a GT28RS but that is a different setup and not the one in question but they share the same compressor housing.

Hope this helps

-Jon

MIAPLAYA

iTrader: (3)

Mabye I didn't explain myself clearly...I understand its the same compressor housing however if the compressor WHEEL has been changed its no longer a GT2871R. I understand its still technically in the GT28xx family but its not a GT2871R per say since the compressor wheel is now larger. It would be like milling out a 60-1 compressor housing and installing a T66 compressor wheel. Its no longer a 60-1 compressor its a T66 compressor in a 60-1 housing.

RageWoRX

Again a GT2871R with a 56 trim wheel has a compressor inducer measuring 53.13mm and an exducer of ....... 71mm Hence the GT28 .... 71R.

I am talking about an Actual 56 trim GT2871R ..... If you read all the way back to begining of this ..... He said he had GT28Rs with 71R sized wheels installed. So Yes you can still call this turbo a GT2871R even if its not technically a 56 trim wheel anymore but lets say a bit bigger (meaning compressor inducer measuring a bit more than 53.13mm now).

The exducer is still 71mm so even in Philty's case (I'm not getting into his custom setup) you can still consider this a GT2871R.

Just like a GT3071R is called a GT3071R because its in the GT30XX family and has a 71mm exducer.

However this does not apply to the GT2835/37/R/RS and etc as there final two numbers don't reference the exducer size they have around a 1.64” exducer size.

There is a difference between trim, inducer size, and exducer size. Not all the numbers on turbos relate to its trim. Most people don't realize this.

I hope this answers your questions.

-Jon