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View Full Version : Thinking up upgrading to a GT3076R-WG



nismodave
07-04-2005, 09:32 PM
I havent even fully tuned my Gt2540R setup yet, but I have a person who want to buy it from me if I decide to upgrade.

So Im thinking about the the 3067R-WG.

I would like to stay bottom mount, and Im thinking about going with some sleeves in winter.

Does anyone where full boost is at RPM wise on the sr? I do have 264/272 step 2s. I hit full boost around 4400 with my current setup.

Anyway, thanks for any imput. http://forums.freshalloy.com/images/graemlins/cool.gif

cwdmark
07-05-2005, 06:53 AM
with 264/264 i hit 18psi at 4k.

don't even think of running external wastegate on that turbo though, it won't work.

killjoy
07-05-2005, 10:31 AM
It will with a t3 backside:)

S14Redtop
07-05-2005, 11:27 AM
i think s13mark meant it won't work with INTERNAL wastegate. He had the 3071 and even THAT was too big for the internal gate. With external it should be fine.

mark

cwdmark
07-05-2005, 03:16 PM
i think s13mark meant it won't work with INTERNAL wastegate. He had the 3071 and even THAT was too big for the internal gate. With external it should be fine.

mark


yep, thanks for catching that.

TS4l
07-05-2005, 03:56 PM
I'd say full boost would be about the same, if not quicker! I have the 3076 and stock cams and its at full boost(18psi)about 4200-4400. Its a lot of fun for sure, but what type of driving are you looking to do? Deffinately not an SCCA or road course turbo. Really smooth transition to boost as compared to a t3/t4 making it super easy to keep stable when boost hits!

nismodave
07-05-2005, 09:08 PM
I was hoping to keep it internally gated, I dont want to buy a new mani.

I mostly do 1/4 stuff and a little goofing on the street Vs my freinds Cobras and Vettes.

cwdmark
07-06-2005, 10:20 AM
I was hoping to keep it internally gated, I dont want to buy a new mani.

I mostly do 1/4 stuff and a little goofing on the street Vs my freinds Cobras and Vettes.

well, you can't get the 3076 with interal wastegate and expect it to work. correction to my previous post: i had the 3071r wg, not 3076.

the limit for internal wastegate is the gt2871r in either trim. anything past that you have too much air moving for the internal wastegate to handle. even with no boost controller hooked up on the 2871, i hit 10-11 psi, it holds for a bit then it just starts raising, but it stops around 15psi. there is boost creep but it can be corrected with a boost controller, and 15psi isn't much to worry about. but on the 3071 it would go to 11-12psi...then up, and up, and up farther. not letting off the throttle would net around 24psi. yes, it's completely due to the internal wastegate. what can you do about it? not much other than weld it shut and go external or just buy the right one in the first place.

Kookz
07-06-2005, 11:00 AM
Or port the internal gate.

harlock_ssx
10-31-2005, 05:21 AM
I was hoping to keep it internally gated, I dont want to buy a new mani.

I mostly do 1/4 stuff and a little goofing on the street Vs my freinds Cobras and Vettes.

well, you can't get the 3076 with interal wastegate and expect it to work. correction to my previous post: i had the 3071r wg, not 3076.

the limit for internal wastegate is the gt2871r in either trim. anything past that you have too much air moving for the internal wastegate to handle. even with no boost controller hooked up on the 2871, i hit 10-11 psi, it holds for a bit then it just starts raising, but it stops around 15psi. there is boost creep but it can be corrected with a boost controller, and 15psi isn't much to worry about. but on the 3071 it would go to 11-12psi...then up, and up, and up farther. not letting off the throttle would net around 24psi. yes, it's completely due to the internal wastegate. what can you do about it? not much other than weld it shut and go external or just buy the right one in the first place.



Wrong. http://www.atpturbo.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=GRT-TBO-033&Category_Code=GRT

_Def_
10-31-2005, 05:52 AM
I was hoping to keep it internally gated, I dont want to buy a new mani.

I mostly do 1/4 stuff and a little goofing on the street Vs my freinds Cobras and Vettes.

well, you can't get the 3076 with interal wastegate and expect it to work. correction to my previous post: i had the 3071r wg, not 3076.

the limit for internal wastegate is the gt2871r in either trim. anything past that you have too much air moving for the internal wastegate to handle. even with no boost controller hooked up on the 2871, i hit 10-11 psi, it holds for a bit then it just starts raising, but it stops around 15psi. there is boost creep but it can be corrected with a boost controller, and 15psi isn't much to worry about. but on the 3071 it would go to 11-12psi...then up, and up, and up farther. not letting off the throttle would net around 24psi. yes, it's completely due to the internal wastegate. what can you do about it? not much other than weld it shut and go external or just buy the right one in the first place.



Wrong. http://www.atpturbo.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=GRT-TBO-033&Category_Code=GRT



Read what he wrote again, he's talking about boost creep WITH the internal gate.

TiAndy
11-01-2005, 08:06 AM
Hi
I've been following this thread for a while as i decided to use a GT3076R-WG on my FWD 2186cc Turbo and this is vertually the only thread i've found on the internet were people have had or are having experience of it.

I have experienced very little boost creep.

This is a plot on actuator pressure so no boost control valve. (11psi) Boost is the bottom curve
http://x2.putfile.com/9/27213075026.jpg

This is a plot with electronic boost control using the Audi/Vw NV75 BCV. As this is a FWD car and with traction/drivability in mind boost was set, rpm based and for an approximate 14psi @ 5000rpm, 16psi @ 5500rpm & 18psi @ 6500rpm using a DTA ECU. Boost curve is the pink line though the table format below shows it better

http://x2.putfile.com/10/28713523456.jpg

http://x2.putfile.com/10/28714113125.jpg

So in my experience if set up properly you won't have any real issues with the GT3076R-WG

Next step after some winter upgrades is to run it up to 28psi and 8krpm

Regards

Andy