This is a daydream, so please treat it as such, but with a little more respect. ;) I'm looking for a turbocharger.

I want to use a GTi-R manifold for stealth factor and clearance. If I wanted stealth, I would have used the Bluebird manifold; if I wanted clearance I'd use an F-Max long-runner manifold. The GTi-R manifold is perfect, providing a little bit of both. Modifying it for a divorced W/G is not a problem in this daydream, so that pretty much blows the doors wide open, because if I'm comfortable with an XWG, I'm comfortable with a T3 flange being welded on, right? Of course right. Can you tell I've thought a little bit about this?

I have three goals in mind: Lightning-quick response time. 300 WHP, give or take a little. Avoiding Jay Hassinger's Ultimate Demise (link (http://www.se-r-list.org/archives/2000/2000-07/msg01754.html)*).I know that the T28 isn't exactly a dog for spooling, but I want it quicker if I can get it, and a T28 isn't supposed to be able to support 300 WHP very reliably. Finally, I don't want to make so much power that I get sick of the car (The Wife may have to drive it once in a while, too). These goals have brought me to one turbo in particular. According to the FAQ:GT2530 (http://www.hksusa.com/products/?id=704): This is a pretty good turbo, but I don't understand why HKS won't offer it with the larger .86 A/R turbine housing. This with the larger turbine housing will outperform a GTi-R turbo. This should be good for 300 whp and good response from 3000 RPM on up.It has everything I want; a ball bearing center section, a T25 flange, an internal W/G, and a big compressor housing for plenty of power. As JCGator42 pointed out, though, saddled with a .64 A/R housing, it appears to be less capable than a T28 before inducing reversion. Have I misread this? Can somebody offer a better suggestion?

* - If this link doesn't work, go to the SE-R Archives (http://www.se-r-list.org/archives/), search for "Turbine housing conversion," and click on the message titled "About me selling my car."

Better suggestion? The HKS GT2835. This thing is awesome. A friend of mine has it and I got the chance to drive his SE-R w/ this beast in there. It will bolt up to the GTi-R manifold, but don't get the the "R" version or the compressor housing won't clear the block. I forget about the details of the WG, but I think you can get it with and internal one. Oh, and it has the same T25 flange.

Driving this thing, there is no lag, it is super-linear and it is very very smooth. It feels like there is a huge displacement motor under the hood. Oh, and 300hp is no sweat with this turbo. ;)

If I were to upgrade my DET, this is exactly what set up I would go with.

Most excellent suggestion! Thank you! The GT2835R (http://www.hksusa.com/products/?id=711) comes in three configurations, two of which are interesting to me:1401-RA085 ALL 56T 0.86 T25 Flange Internal $3245.00
1401-RA103 ALL 56T 0.87 T25 Flange External $2600.00Check out the price differences, though! That's $645 for an internal wastegate! :eek:

I dunno; a TiAL W/G and the welding might be that much. I'm also aware that several US vendors can get it for less money than that, but I am just daydreaming. ;) About the power, though; I don't want much more than 300, are you sure this isn't too much compressor?

Cowboy, he said to not get the 2835R look for the regular 2835, I will see if I can find some info on it,
JCC

Rob does talk about that turbo, he said that it's a good one, and can support ~375whp,
JCC

P.S. Excellent choice, I would get it if I had $1500+ for just the turbo, it is like a T28 but can flow 75whp worth of air more just as reliably, and quickly.

Does anyone know if this turbo would fit on 1996 Avenir manifold? And should it spool and have similar lag to a GTi-R T28?

Even though it's bigger, it should spool about the same because it has a ball bearing center section. I don't know jack about the Avenir engine (as if I knew jack about the Bluebird engine), so who knows if it'd fit or not. Based on what AntonioG said, though, my money's against it. If the R model doesn't fit even on a GTi-R manifold, the Avenir manifold would have to stand off pretty far for there to be any chance.

It would be really, really, really nice to see an Avenir, Bluebird, and GTi-R engine all layed out together with their differences illustrated and explained, wouldn't it? :(

After watching this forum even more, I've decided that my power goal is in that really weird place where a small turbo isn't going to be safe, but a big turbo will probably make too much power. That said:

How much power do you think you could get out of a T28 with a T04E compressor housing make when bolted to a stock engine? This would probably be adding JWT S3 cams and tweaking with some sprockets, but still using a lot of other parts. A proper FMIC, massively upgraded fuel and air flow systems, an extrude-honed exhaust manifold and turbine, and otherwise generally good design.

I've heard that the 9:1 engines are good for 400HP, but I still think that's crazy. I'd like to avoid things like water injection, too.

Hey, the housing you need is of off a S14 or S15 ball bearing turbo silvia(T28 also). The turbo can make around 300-320whp safely at somewhere b/w 16-18psi. The normal Gti-R T28 can take around 280whp at those boost levels.
JCC

Yeah, but what about safety? I'm talking about a stock lower end, with 9:1 or 9.5:1 compression, not a GTi-R with 8.3:1, and a single throttlebody with the restrictive low-port intake configuration. Also, I thought that T28s suffered from reversion by 16PSI, or is that just with a standard compressor housing?

I never said 16-18psi for long periods of time. A quarter mile run or a dyno run, etc. Yes, I am talking about pretty safely, the bottom end can be pushed to 400+whp, so I think 300whp is pretty safe as long as the rest is covered,
JCC

P.S. with a nice port and polish and valve job/S3 Cams, and a ported and polished intake manifold, I doubt it will be that restrictive at all.

Check this one out. Good deal. Good seller too.

http://www.sr20deforum.com/showthread.php?s=&threadid=17364

The R series on the gt2835 has a 3.5 inch inlet i think but not for sure. But indeed it is larger in diameter. The regular GT2835 which my se-r is equipped with has a 2.75 in diameter inlet . TO4e compressor housing 50 a/r ,52trim turbine 73 a/r from what i remember. Yes like one listy said he drove it and its a mad spooler. This turbo can put out more hp than GT2540r which is a decent turbo for what it is and Rob Cadle also mentioned some things about this turbo as well. I would suggest you look into it .


Larry

...but if the 2540R makes 300 HP at the wheels, why would I want a 2835? Does the 2540R not spool as quickly? I don't see the down side yet. I'd like to be able to drive the car in the rain once in a while...and survive the trip...

Ok like i mentioned read the post by Rob Cadle on turbos its interesting. Just because a person get 300hp to the wheels on X turbo doesnt mean A person will get the same. This goes with any turbo. Its your choice i dont expect anyone to listen to my opinion im only stating it. The smaller 2549 will most likely spool faster and have better low end response vs. 2835 which will obviousl have better top end beacause of the larger wheels. This
will give you less "wheelspin" on the lowend. I know this first hand because my t-28 used to rip hard 1-3 gears spinning wheels , the gt2835 on the other hand has more linear response and it doesnt spin as violently but the top end is incredible .


Larry

http://www.sr20deforum.com/showthread.php?s=&threadid=8087&highlight=gt2835 This will briefly explain to you , Theres a more descriptive listing of Rob cadles turbo theory
in full on the forum just will take some searching i could find it if you like.

larry

I've been over that document dozens of times; actually, I read his original post to the SE-R mailing list, but it's the same content. ;) Rob openly admits that his experience is by no means the ultimate authority, but I don't take his words lightly, either. I'd want a lot more information on how 300HP happened before I'd plunk down two and a half GRAND on a turbo. ;)

By all means investigate thats what i recommend . I have seen too many fall just relying on what people say . There are individuals with knowledge that is benificial but many have not experienced X situation to be giving advice. Many poeple rely on the forum and if someone listens to the wrong advice BOOM thats
it. I have seen a few individuals screwed because of this already.
Do the footwork yourself and you will be in the right direction.
Take it from someone who made many mistakes and quick decisions.

Good Luck
Larry

wait! 2500.00 on a turbo? whew!

Look around. You can find them for less than 2k. I also believe you can get them for even less if you don't get an HKS turbo. Hks has some proprietary housings, but if you can find the same turbo from garrett, just buy the housing from HKS (2-300 dollars) and swap it. get EXACT specs of the hks turbo you want, and start shopping around for garrett GT turbos and do your homework.

Re: the 2540. I think the reason this turbo is not so highly reccomended is the turbine/compressor matching. I had a discussion about this with Rob, and basically he said by themselves, each half of this turbo is pretty good and efficient, they just aren't a very good match for each other. their sweet spots don't coincide. But after all, YMMV. I've got a turbo on my car that i thought would be a pile of shit, but is actually turning out to be rather pleasant.

Andris