GT3076R vs GT3082R
03-01-2006, 08:43 PM
#1
GT3076R vs GT3082R
Im trying to choose between these two turbos for my car. Application is a 2.0L GSR that is 95% street usage. I want the fastest spooling turbo that can make 500~550whp.
The GT3082R is also known as a GT3040 as it has an 82mm GT35/40 compressor wheel mated to a GT30 turbine. Its the largest GT30 and I believe its rated for 600hp.
I called Precision today and Joe told me about the GT3076R-13. Apparently theres 5 versions (cartridges) of the GT3076R, all with the same compressor and turbine wheels. I guess the only difference is compressor trim. So this -13 cartridge is the biggest version and he said it can support 600hp too.
Now Im a little skeptical that a 76.2mm 60 trim compressor wheel can support the same HP as an 82mm wheel with the same turbine. Unless the turbine was totally maxed out, which would make the 3082/3040 a worthless turbo. And some told me the 3082 is a bad mismatch of wheel sizes but the GT35R has a killer compressor map.
Mikes01GSR has a GT3040 which made 515whp with and I believe Andrea had a 3076 .82 AR. JDMvtec28 also made 550whp with a 3037 (same size as 3076-13, 56trim). So its proven the smaller 3037 can make 550whp but I havent seen any dynos of 550whp from a 3040.
Im looking for anyone who has experience with both turbos.
Modified by Muckman at 11:44 PM 3/4/2006
The GT3082R is also known as a GT3040 as it has an 82mm GT35/40 compressor wheel mated to a GT30 turbine. Its the largest GT30 and I believe its rated for 600hp.
I called Precision today and Joe told me about the GT3076R-13. Apparently theres 5 versions (cartridges) of the GT3076R, all with the same compressor and turbine wheels. I guess the only difference is compressor trim. So this -13 cartridge is the biggest version and he said it can support 600hp too.
Now Im a little skeptical that a 76.2mm 60 trim compressor wheel can support the same HP as an 82mm wheel with the same turbine. Unless the turbine was totally maxed out, which would make the 3082/3040 a worthless turbo. And some told me the 3082 is a bad mismatch of wheel sizes but the GT35R has a killer compressor map.
Mikes01GSR has a GT3040 which made 515whp with and I believe Andrea had a 3076 .82 AR. JDMvtec28 also made 550whp with a 3037 (same size as 3076-13, 56trim). So its proven the smaller 3037 can make 550whp but I havent seen any dynos of 550whp from a 3040.
Im looking for anyone who has experience with both turbos.
Modified by Muckman at 11:44 PM 3/4/2006
03-01-2006, 10:23 PM
#2
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Re: GT3076R vs GT3082R (Muckman)
My brother and I are in the middle of his 83mm Benson gsr build. I have been looking at these turbos for a while now trying to decide on just which one to use. We're going with the .82 A/R 3076...
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman »</TD></TR><TR><TD CLASS="quote">I want the fastest spooling turbo that can make 500~550whp.
</TD></TR></TABLE> Thats funny, because that is exactly what we're shooting for.
Mike made 515whp with a GT3040 but I am told that he stopped there because he is using Eagle rods. The 3040 should have no problem making 600whp, but i am under the impression that the GT3076R will spool just a bit faster and with ~550 as a goal, I think the .82 A/R GT30R is ideal. We should be boosting with one soon... i can't wait.
If you're goals are closer to ~500whp you might want to look at the GT3071. It will support those numbers and spool faster too. Unfortunately, I can't find anyone who has really maxed one out. I'm currious to see if it could make 550whp with the right setup.
I know people are using these. I would like to hear from others with experience as well...
Modified by 4rc-fed at 11:35 PM 3/1/2006
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman »</TD></TR><TR><TD CLASS="quote">I want the fastest spooling turbo that can make 500~550whp.
</TD></TR></TABLE> Thats funny, because that is exactly what we're shooting for.
Mike made 515whp with a GT3040 but I am told that he stopped there because he is using Eagle rods. The 3040 should have no problem making 600whp, but i am under the impression that the GT3076R will spool just a bit faster and with ~550 as a goal, I think the .82 A/R GT30R is ideal. We should be boosting with one soon... i can't wait.
If you're goals are closer to ~500whp you might want to look at the GT3071. It will support those numbers and spool faster too. Unfortunately, I can't find anyone who has really maxed one out. I'm currious to see if it could make 550whp with the right setup.
I know people are using these. I would like to hear from others with experience as well...
Modified by 4rc-fed at 11:35 PM 3/1/2006
03-01-2006, 10:40 PM
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Re: GT3076R vs GT3082R (4rc-fed)
i have a couple GT30R's at the shop, one of which is the big trim you are talking about. as soon as i get in ill post the pics i took with a caliper, so we can see what kind of difference we are talking about.
the guys at precision told me that the larger 600 hp trim is the way to go.
the guys at precision told me that the larger 600 hp trim is the way to go.
03-01-2006, 11:16 PM
#4
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Re: GT3076R vs GT3082R (SEFIxCivic)
I run a gt3040r on my dohc ZC - however i have yet to dyno it with the new setup, hell i have yet to even start the car. But it looks pretty!
03-02-2006, 05:32 AM
#6
Re: GT3076R vs GT3082R (4rc-fed)
The 3071 is the smallest of the GT30R family. It has a 71mm compressor. Its rated for only 450hp.
The problem Im finding is none of the big Garrett dealers sell the 3082 (3040) so they can't compare the two turbos. In fact I dont know who even makes the 3040. Where did it come from? I know HKS sells a 3040 for an outrageous price but someone else makes a 3040 too. Precision or ATP dont know what it is and its not even on Garretts website. Mystery turbo.
Modified by Muckman at 9:50 AM 3/2/2006
The problem Im finding is none of the big Garrett dealers sell the 3082 (3040) so they can't compare the two turbos. In fact I dont know who even makes the 3040. Where did it come from? I know HKS sells a 3040 for an outrageous price but someone else makes a 3040 too. Precision or ATP dont know what it is and its not even on Garretts website. Mystery turbo.
Modified by Muckman at 9:50 AM 3/2/2006
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03-02-2006, 07:34 AM
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Re: GT3076R vs GT3082R (Muckman)
the 3040R is the perfect "middle ground" between the 2. we keep the GT3040R in stock at all times, with your choice of .63 a/r or .82 a/r turbine.feel free to give anthony or myself a call toll free 877-23-TURBO with any questions
03-02-2006, 08:55 AM
#11
Re: GT3076R vs GT3082R (Ken Peak)
Heres a 3040 .63AR from Mike01GSR's car. Tuned by Jeff Evans.
Tuning at 15psi, 93 octane pump gas:
Tuning at 19psi, ~103 octane race gas:
Notice that amazingly flat torque curve all the way to 8400rpm. And this is from an .63 AR turbine. Based on this I dont see a reason to go with a larger .82 AR turbine housing. Disagree?
Tuning at 15psi, 93 octane pump gas:
Tuning at 19psi, ~103 octane race gas:
Notice that amazingly flat torque curve all the way to 8400rpm. And this is from an .63 AR turbine. Based on this I dont see a reason to go with a larger .82 AR turbine housing. Disagree?
03-02-2006, 12:03 PM
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Re: GT3076R vs GT3082R (Muckman)
Can anyone give me a reason to step up to the GT3040 from the GT30R if you're looking for no more than ~550whp?
Just seems like considering spool time the 30R would be the way to go...
Also... ATP does have the GT3040R
http://www.atpturbo.com/Mercha...e=GRT
Just seems like considering spool time the 30R would be the way to go...
Also... ATP does have the GT3040R
http://www.atpturbo.com/Mercha...e=GRT
03-02-2006, 12:22 PM
#13
Re: GT3076R vs GT3082R (4rc-fed)
Thats funny because its not listed in their "Official Garrett GT-R Ball Bearing Line Up". Must be a website mistake.
Anyhow, it would help if you define which GT30R your talking about since theres about a dozen variations with a range of 150hp.
Anyhow, it would help if you define which GT30R your talking about since theres about a dozen variations with a range of 150hp.
03-02-2006, 12:36 PM
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Re: GT3076R vs GT3082R (Muckman)
Sorry, all these names get confusing....
As apposed to going with a GT3040R (aka GT3082) which is capable of 600whp, I decided to use the GT30R (aka GT3076R) which should spool a bit faster and still make ~550 which is really all im shooting for.
Mike uses the .63 A/R GT3040R and if 600whp was my goal, then that would be my choice.
As for the GT3076 (GT30R) the .82 A/R seems to be the sweet spot. Atleast from the dyno sheets i've looked at.
For all the help and info
As apposed to going with a GT3040R (aka GT3082) which is capable of 600whp, I decided to use the GT30R (aka GT3076R) which should spool a bit faster and still make ~550 which is really all im shooting for.
Mike uses the .63 A/R GT3040R and if 600whp was my goal, then that would be my choice.
As for the GT3076 (GT30R) the .82 A/R seems to be the sweet spot. Atleast from the dyno sheets i've looked at.
For all the help and info
03-02-2006, 01:19 PM
#15
Re: GT3076R vs GT3082R (4rc-fed)
Well Jeff Evans has made 550whp on a 3076 .82AR on his dyno so thats proof the 76mm wheel can get you there. I prefer the 3040 is because you dont see the torque drop you see after 7500rpm as you do with the 3076. However the 3076 .82AR will get you there a couple hundred rpm faster than the 3040 .63AR but seems to run out of breath sooner too.
These are two very good dynos to compare. They are both similar GSR setups, tuned by the same tuner on the same dyno.
3076 .82AR http://forums.evans-tuning.com...=2330
3040 .63AR http://forums.evans-tuning.com/viewtopic.php?t=462
Modified by Muckman at 5:58 PM 3/2/2006
These are two very good dynos to compare. They are both similar GSR setups, tuned by the same tuner on the same dyno.
3076 .82AR http://forums.evans-tuning.com...=2330
3040 .63AR http://forums.evans-tuning.com/viewtopic.php?t=462
Modified by Muckman at 5:58 PM 3/2/2006
03-02-2006, 01:43 PM
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Re: GT3076R vs GT3082R (Muckman)
You make a good point about the torque holding like that....
Such a tough decision. Either way you end up with 500+whp and an awesome power curve. Good luck with your project
Such a tough decision. Either way you end up with 500+whp and an awesome power curve.
Good luck with your project
03-02-2006, 03:13 PM
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This thread really helped me out with the decision of my new skyline turbo, being a inline 6, 2 liter and a full street car I was looking for something that would give me 400whp on pump gas and in upwards of 500whp on c16, I think the 3076 with the .82AR will be perfect since my redline limit is 7400-7600 anyways, looks like this will be perfect for me. Looks like boost comes in around 4000 rpm, thats amazing, time to sell the SC-50.
Thanks ... Chris
Thanks ... Chris
03-02-2006, 04:42 PM
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Re: (fled)
I tuned a customers car about a month ago with one of our kits with a GT3040 on a low compression (8:1) 81mm ls/vtec. It put down 375whp @9.2psi off a street tune. I was very very impressed with the tq curve, holds flat right till redline, this is with a .63ar taking it to ~8500. We had problems with the boost controller so couldn't turn the boost up on the dyno...At this power level in a full interior coupe (with 250-275lb driver) it trapped 122mph. I did another street tune on the car a few weeks ago @ 18psi, haven't had a chance to dyno it yet but its trapping ~130 last time at the track 
03-02-2006, 05:19 PM
#23
Re: (PhoenixTurboJesse)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PhoenixTurboJesse »</TD></TR><TR><TD CLASS="quote">I tuned a customers car about a month ago with one of our kits with a GT3040 on a low compression (8:1) 81mm ls/vtec. It put down 375whp @9.2psi off a street tune. I was very very impressed with the tq curve, holds flat right till redline, this is with a .63ar taking it to ~8500. We had problems with the boost controller so couldn't turn the boost up on the dyno...At this power level in a full interior coupe (with 250-275lb driver) it trapped 122mph. I did another street tune on the car a few weeks ago @ 18psi, haven't had a chance to dyno it yet but its trapping ~130 last time at the track </TD></TR></TABLE>
Exactly why I pointed him in the GT3040R direction. Thanks for the follow up Jesse!!
Modified by TheShodan at 1:00 AM 3/5/2006
</TD></TR></TABLE>Exactly why I pointed him in the GT3040R direction. Thanks for the follow up Jesse!!
Modified by TheShodan at 1:00 AM 3/5/2006