Who's running a GT3071r?

[TConklin821]

I just got my GT2860 on and it's awesome, but my A4 has almost 170,000 on her, and she's getting old. I want to rebuild the engine with new rods and pistons, and get some head work done. However, if I'll be getting all new internals, I want to put a beefier turbo on there. I have done some looking and seen some cool builds, but I'm curious about numbers. Is 400whp possible with this turbo with all the proper supporting mods? Or should I be looking at a 3076, or something even bigger?

[ray4624]

Look into the gtx line if you can afford it. They supposedly spool up real nice for bigger turbos.

[thenj3]

Do you have a max boosts you wanna run or just the smallest turbo pushed to the limit to hit 400wheel. Also you looking at a 1.8 or 2l build?

[ZimbutheMonkey]

I'd say the 3071 would be a good choice. It's a good spooling turbo for a 1.8t. But I'd pass on the GTX for the cost you can do better. Personally I'd look at the Comp turbos, you could get them to make you a custom Triplex setup for the same price as a GTX that can be tailor made to your setup.

I find that the GTX series are alright if you want to push really high boost, but they don't spool any better. In fact, the 11 blade design isn't as efficient at low pressure ratios as a traditional split design. The split design that Comp (and others) uses is a better all around compressor.

[TConklin821]

I'll look at the GTX line. ATP offers a 3071 that will bolt into the stock location. Should I go with a different housing? Not sure, This way I can keep the stock downpipe flange and all. Not sure which way to go. I will be staying at 1.8, don't have all the funding to go to a 2l. I have heard of some fitment issues with Comp, but I'll look into those as well. Is the 3071 going to get me anywhere close to 400whp? I know I'll need a new fuel pump, fpr, probably at least 630cc injectors and a new clutch. I would rather have just under 400 and keep a decent spool time, I don't wanna sacrifice useable power just for horsepower.

[Dan[FN]6262]

Look into the gtx line if you can afford it. They supposedly spool up real nice for bigger turbos.

Very false, if you want 400+awhp

[spinnin_four]

i know its apples to oranges, but my boss' WRX, stock bottom end w/ CP pistons and a knock off 3071 (journal bearing) made 410 awhp and 415 wtq on pump gas and 19 lbs, only revving to 6500- break in tune, so i would bet a legit 3071 with a good tune should be close on an Audi

[morzechowski]

I made 450whp on a 3076 only revving to 6200rpm with my very abused stock head. I was going to shoot for 600whp with my built head but I parted the car out before I got to tune with the built head. so yes I would say you can easily hit 400whp with a 3071.

400whp is very easy if you stay away from the basic big turbo software out there that makes you run 630cc injectors or whatever.

sales pitch: my already tuned to 450whp p&p 1.8t Haltech PS1000 ECU is for sale ;)

[ElliottG]

I made 450whp on a 3076 only revving to 6200rpm with my very abused stock head. I was going to shoot for 600whp with my built head but I parted the car out before I got to tune with the built head. so yes I would say you can easily hit 400whp with a 3071.

400whp is very easy if you stay away from the basic big turbo software out there that makes you run 630cc injectors or whatever.

sales pitch: my already tuned to 450whp p&p 1.8t Haltech PS1000 ECU is for sale ;)

Really 600whp from a 3071? Wow...I didn't think they could make that much power.

[andyrew]

400whp was my goal as well so i went with the CTB5356 im sure ill hit it with around 25psi and meth or 100 octane.. Ive been told that the turbo is efficient to like 35psi... so it could have way more potential than 400wheel.. dont know...

I personally would probably go with a smaller Gtx or CT to get some quicker spool if i knew what this turbo was really like.

[spinnin_four]

Really 600whp from a 3071? Wow...I didn't think they could make that much power.

morzechowski stated it was a 3076

[thenj3]

Really 600whp from a 3071? Wow...I didn't think they could make that much power.

3076 and e85

[Seerlah]

What is your budget? GT3071R is good for maybe 325-350whp on an OTS tune and pump gas. With a custom tune, you should be able to squeeze 350-400whp on pump gas. But this won't happen on an off the shelf tune. You will also want to look into getting into a T3 setup.

[TConklin821]

Yeah I am looking into a T3 style housing and manifold. It will be custom tuned, without a doubt. As of now I'm not sure what my budget will be to be honest. With a custom tune I was thinking 350-400, given that the 2871r is supposedly able to make 400chp, I figured the 3071r wouldn't have a problem with around 450 or so chp

[ray4624]

I'd say the 3071 would be a good choice. It's a good spooling turbo for a 1.8t. But I'd pass on the GTX for the cost you can do better. Personally I'd look at the Comp turbos, you could get them to make you a custom Triplex setup for the same price as a GTX that can be tailor made to your setup.

I find that the GTX series are alright if you want to push really high boost, but they don't spool any better. In fact, the 11 blade design isn't as efficient at low pressure ratios as a traditional split design. The split design that Comp (and others) uses is a better all around compressor.

Ah didn't know they were useless for the high boost applications. Thanks for the correct info.

[Seerlah]

You either misread what he wrote or you made a typo. The GTX is good for running large amounts of boost. If running mid 20s of pounds per square inch then it would be better to look into a different option. Cost simply would not be worth it.

[M-Hood]

morzechowski stated it was a 3076

GT3076r isn't going to flow enough air to make 600awhp, hell most A4 owners running larger turbos haven't been able to hit that mark. lol
I don't even think a HTA3076r makes 600whp and it flows more then a GT3076r.

[ElliottG]

morzechowski stated it was a 3076

Woops...copied it wrong. That's what I meant.

[morzechowski]

GT3076r isn't going to flow enough air to make 600awhp, hell most A4 owners running larger turbos haven't been able to hit that mark. lol
I don't even think a HTA3076r makes 600whp and it flows more then a GT3076r.

if the car held up long enough we would of known for sure! I had a new PTE6262 ceramic bb at my house ready to go in if the 3076 did not make a good enough number.

[TConklin821]

I want to run an internal wastegate, but all the exhaust manifolds I see are for an external.

[thenj3]

Why would you wanna run internal? They aren't efficient for large turbos? And plus dump tubes sound awesome

[Seerlah]

That is because just about everyone will use an external WG on a T3 manifold. On the T25, they use internal mostly. Why don't you want to run external. They are much more easy to work with and you get get them used for good prices. I personally run the Precision PW39.

[thenj3]

Ill sell you a psi concepts t3 setup with 38mm gate with down pipe with wastegate recirc'd

[TConklin821]

Mostly because I don't 100% understand how they work or how to hook them up. What is the point of that tube? I need a diagram.

[Seerlah]

You have one side (bottom) of the EWG that goes onto the manifold. You leave the top port vented, and the side nipple goes to one side of your boost controller or n75 (WG port). The other port on your boost controller goes to the boost pressure source. Place in a spring that you desire, and that's about it (with a boost controller, does not matter what spring you have. but when you want to run off of WG pressure it does).

You have 2 ways of directing the excess exhaust. Open dump tube, or reroute into the exhaust system. I like things quiet, so I always opted for the reroute. If not going that route, just get a dump tube and route it to under the car.

This was my old setup, and basically the same thing you would run if purchasing thenj3's setup. See how the WG is setup? And you have 2 ports on the EWG. Stated bove is how you would route that. This is a WG reroute vs a dump.

[TConklin821]

And the wastegate itself opens up and you can change out springs, similar to a DV?

[Seerlah]

Yep. Just like a DV (ie Forge units).

http://www.turbosmartusa.com/technic...astegate-work/

[TConklin821]

Also, where can I find a manifold that puts the turbo on top?

[TConklin821]

So when boosting the wastegate is closed, letting more exhaust gasses run through the turbo as opposed to around it?

[Seerlah]

Mine is from RAI Motorsports. Call them up and ask them how much. Other than that there is the Full Race, Augtronic, RAI tubular, SPA, and a couple others. Mine is actually a side mounted log manifold, but the flange is angled to have the turbo top mounted. Custom built from Vibrant pieces.

So when boosting the wastegate is closed, letting more exhaust gasses run through the turbo as opposed to around it?

As your boost (intake) increases, so does your exhaust gas. When you reach whatever level boost you want to run, the WG "opens" to allow another path for exhaust gas to travel instead of going through your turbine housing, creating more boost. This is what limits your boost versus you running like 30psi before you let off the throttle.

[TConklin821]

What means "log manifold"?

edit: That makes sense. So it stays closed (or open a little?) until the proper boost limit is reached at which point it opens

[Seerlah]

I edited my last post.

There are really only 2 types of manifolds. A log manifold and a tubular manifold. A tubular manifold has a separate runner for each exhaust port out the cylinder head to a collector, where the T3 flange sits. A log manifold will basically have all that runners open to a big void, then the flange attached to that. Here are 2 pics for example.

Tubular manifold: http://www.full-race.com/store/turbo...-manifold.html
Log manifold: http://www.atpturbo.com/mm5/merchant...Category_Code= (please note that this manifold is garbage. STAY AWAY!!!)

Log manifolds grant quicker spool, while tubular ones grant more top end flow/power.

[TConklin821]

That one from ATP turbo looks a lot like one that 034 offers. I want a tubular manifold but they're so goddamn expensive.

[M-Hood]

if the car held up long enough we would of known for sure! I had a new PTE6262 ceramic bb at my house ready to go in if the 3076 did not make a good enough number.

You would have ended up swapping because a 52 lbs turbo isn't going to make 650awhp without a 100 shot of nitrous or tuned on Nitro Methane. lol

[Seerlah]

The one 034 sells is that exact same manifold...trash. They are a distributor for ATP Tuning. I personally like my manifold a lot and don't plan on changing it unless getting maybe a T4 EFR tubular. My current setup is configured for a number of applications.

If you want to run my setup, call RAI and ask them how much. But know that I am also running a 3" v-band downpipe. Their setup is plug and play like the eliminator (really), except has a T3 flange and places the turbo top mounted on a side mounted log manifold (very cool design). What I did was send in the 3" v-band adapter I was going to use, and they used that to make sure my setup bolted right up. It is all custom. I told them I wanted my downpipe to be 3" with wastegate reroute and it would be used on a T31 turbine housing with 3" v-band adapter. But adapters vary, so they required the one I was going to use. So, I shipped it to them and they went from there. And remember, I have the same AWM like you.

[TConklin821]

I will call. I don't see it listed on their site. So they custom made your manifold and downpipe? Did they use something like this: http://www.atpturbo.com/mm5/merchant...de=ATP-FLS-021 ?

Also, do I see two wastegates?

I can dig this

http://www.034motorsport.com/engine-...l-p-17887.html

[Seerlah]

No, one is my BOV and the other is my WG. And I'm cheap, so I picked up the OBX unit off of ebay. ATP has a really expensive one which I am sure is much much better.

http://www.atpturbo.com/mm5/merchant...Category_Code= (ATP unit)

http://www.ebay.com/itm/2-5-inner-di...d7cbf7&vxp=mtr (God Speed unit that does the same thing)

Can't find the one I picked up from a quick 2 min search. Also, my setup is sold as the B7 kit. It is all custom though, and they can make it for you for the B5.

[TConklin821]

No, one is my BOV and the other is my WG. And I'm cheap, so I picked up the OBX unit off of ebay. ATP has a really expensive one which I am sure is much much better.

http://www.atpturbo.com/mm5/merchant...Category_Code= (ATP unit)

http://www.ebay.com/itm/2-5-inner-di...d7cbf7&vxp=mtr (God Speed unit that does the same thing)

Can't find the one I picked up from a quick 2 min search. Also, my setup is sold as the B7 kit. It is all custom though, and they can make it for you for the B5.

Interesting. I'll do some poking around. I'll obviously have to get tuned for MAF-less and all

Ill sell you a psi concepts t3 setup with 38mm gate with down pipe with wastegate recirc'd

PM'd

[TConklin821]

I know it won't sound the same as an open dump pipe, but does an external WG with the recirc sound any different?

[Seerlah]

Simple question: Do you like loud or quiet?