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Old 02-28-2010, 02:23 AM   #1
Obababoy
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Default Spool for gt3076r around 325-350whp

So im going to be running stock drivetrain for an 07wrx and I have a perrin rotated 3076r with fmic etc etc...Im going to go really conservative(yes its cliche' term) with a goal of 325-350whp to prolong the life of the butter clutch that I have for now...How is this big turbo going to perform at that level? im assuming around 17psi or so right? how will torque be as well?

Thanks in advance,

Chris
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Old 02-28-2010, 04:08 PM   #2
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find a turbo thats more efficient at your power goals.
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Old 02-28-2010, 06:47 PM   #3
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id go with a 18g or 20g, or gt28, but a 30r is better for like 375-425, great turbo though.
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Old 02-28-2010, 07:17 PM   #4
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Default Re: Spool for gt3076r around 325-350whp

You will be fine on the 30r and a conservative tune
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Old 03-01-2010, 03:08 AM   #5
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Quote:
Originally Posted by Csquared33 View Post
find a turbo thats more efficient at your power goals.
You mean for the power goals he has for the near future, or the power goals he has for after he gets his clutch upgraded?

OP: I hit 15psi at around 3500 RPM with my ATP 3076. Your setup would probably behave similarly.

I had my ATP 3076 limited to about 10psi for a few weeks after my stock clutch started slipping (it hit 10 at about 3200 rpm). That got me around 250 whp, pretty similar to my 'stage 2' setup but the power came on much later - power basically increased linearly from idle to redline. I'm basing the 250 figure on MAF, relative to the MAF and dynoed HP from my 'stage 2' setup.

It only slipped around peak boost (which was 23psi) and 3rd gear or higher, so it probably could have held 18 or maybe 20 psi, but I wanted the car to be reliable until I got the clutch swapped.

I'm guessing that 17psi would put you around 300-325 hp and tq. Also guessing based on MAF and some old logs. I still need to get my ATP dynoed.

If you know that's the turbo you want in the end, I say go for it. Even at limited boost it will be a significant upgrade from stock. When you get your clutch upgraded, it'll be another significant upgrade. The only catch is that if you're not tuning it yourself you'll end up paying to get it tuned twice. If you don't make any changes between tunes (other than the clutch of course), maybe you can get your tuner to give you a discount since some of the work will already be done during the first tuning session.
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Old 03-01-2010, 10:34 AM   #6
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I was hitting 340whp at 16.5 psi on my 30r.
After the motor build (cams + 8.9 compression), I'm now hitting around 360whp at 15 psi.

Just to give you an idea of the [very rough] mrp required for a given power level on the 30r.
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Old 03-01-2010, 12:38 PM   #7
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i have an 05 stock bottem end 30r .82 run it at 19 psi making 371hp and 350 tq. spooling around 4g's got 53k on the clock and still no clutch "factory" slip. i am running meth aswell and many other mods. one day all be rebuilding tell then vroom vroom. prersonally i love the bigger turbo on the highway you'll keep pulling.
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Old 03-01-2010, 12:57 PM   #8
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Quote:
Originally Posted by Obababoy View Post
So im going to be running stock drivetrain for an 07wrx and I have a perrin rotated 3076r with fmic etc etc...Im going to go really conservative(yes its cliche' term) with a goal of 325-350whp to prolong the life of the butter clutch that I have for now...How is this big turbo going to perform at that level? im assuming around 17psi or so right? how will torque be as well?

Thanks in advance,

Chris

aren't they only good to like 300ish?
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Old 03-01-2010, 06:28 PM   #9
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Originally Posted by Sinister_kid View Post
aren't they only good to like 300ish?
Gears are very sensitive subject. I have since somebody break 3 gearset (all oem) at stock power levels(had catback and intake only). At the sametime I have seen people go 30k+miles with 350wtrq np. So it is all on the drivers. I would say though over 300wtqr your starting to be on that more things might happen side though, again not something I proved just looking at billions of threads here about it.
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Old 03-02-2010, 12:36 AM   #10
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You're going to need a better clutch. need for speed is going to be hitting as hard as that turbo. I"m running an exedy twin plate. I can't say how your turbo is going to spool but my 3076r twin scroll is passing thru 1.5 bar at 3200 rpm. That turbo is going to be barely working at 17 psi. Buy something smaller if you want to run a stock clutch. Or wait till u can afford the turbo and the clutch.
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Old 03-02-2010, 01:48 AM   #11
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Default Re: Spool for gt3076r around 325-350whp

Quote:
Originally Posted by jdmframe
You're going to need a better clutch. need for speed is going to be hitting as hard as that turbo. I"m running an exedy twin plate. I can't say how your turbo is going to spool but my 3076r twin scroll is passing thru 1.5 bar at 3200 rpm. That turbo is going to be barely working at 17 psi. Buy something smaller if you want to run a stock clutch. Or wait till u can afford the turbo and the clutch.
^+ that and not to mention the increased stress on your gears etc. Got that ppg gear set lined up?
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Old 03-02-2010, 07:24 AM   #12
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The problem with getting a new clutch on a stock tranny is your going to cause more shock and stress to the gears, having a better chance to fail. The slipping the stock clutch is what saves a lot of people from breaking the gears. So this is a catch 22 here. One hand you get a better clutch to help you put the power down at the cost of possibly breaking your gears or you keep your stock clutch causing some slip at times but saving your gears.
Otherwords if you want to put power down as your first mods that is fine but your going to have to do drivetrain at some point or another, you can't just push the tranny to the side, cover your ears and say lalalalala all the time cause at some point or another your going to break them. As somebody mentioned if you have PPG lined up thats the wrong approach. Find a gearset or tranny that suits you. PPG and sti transmission is not for everybody. Might it work for you sure, but it doesn't meet everybody needs 100% of time. That is a whole another huge story and I would tell you to start reading threads now on that.

But answer to your question is if you want 325-350whp a vf turbo or 16/18g may get what your looking for better. gt30 is a turbo that will put around 375-400 more at the cost of a little more lag then those other turbos.gt30 will be hard on your stock gears and not to mention gt30 might be hard on some internal parts of engine. Things like ringlands if not tuned 100%. These are all side things you need to consider and have saved up for incase. You can't just pick a turbo, put it on and not have things to support it.
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Old 03-02-2010, 01:11 PM   #13
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Have a Nice Day?

Am I the only one who read the OPs post and figured out that he is going to upgrade his clutch later?

What is the deal with all these recommendations for smaller turbos? Do you guys figure it's better to upgrade the turbo twice? That's a waste of time and money. You can put parts on in any order, as long as you are aware of the limiting factors. And the OP obviously is, or he wouldn't have started this thread.
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Old 03-02-2010, 01:54 PM   #14
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Quote:
Originally Posted by NSFW View Post
Am I the only one who read the OPs post and figured out that he is going to upgrade his clutch later?

What is the deal with all these recommendations for smaller turbos? Do you guys figure it's better to upgrade the turbo twice? That's a waste of time and money. You can put parts on in any order, as long as you are aware of the limiting factors. And the OP obviously is, or he wouldn't have started this thread.
Why smaller turbo? Maybe due to the fact that he said he has a power goal 325-350whp which many smaller(and cheaper) turbos can accomplish. Now if it is like you said wants to detune and have it for later use so he doesn't pay twice and worry about everything else later then he can do that as well. So in a way everybody was trying to help him out by saving him some money and not waste it on a turbo that he wont fully use if he doesn't have a plan. Yes you can put parts in any order your heart wants but their are smart ways or doing thing and half ass ways of doing things. If you said am getting a gt40r with stock exhaust then am sure you would say something, why? Cause no benefit without an exhaust and million other things. We are also trying to give him heads up on his drivetrain in case he didn't know about it that as well. So again forum is not being a smartass just trying to give him some useful advice. His question was answered that he originally asked but got some more information to help him out. If you asked if jumping off a bridge backwords would work and we all said yes, wouldn't you like to know that the sudden stop at the end might not be a good idea. Don't take this the wrong way am not trying to get against you, but don't appreciate when people say just answer the damn question when the person asking might not know everything about what he/she planning to do. Otherwords were just trying to help him/her out. Now if they don't care for our advice or warning that is a different story.
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Old 03-02-2010, 01:57 PM   #15
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Default Re: Spool for gt3076r around 325-350whp

Quote:
Originally Posted by NSFW
you can put parts on in any order, as long as you are aware of the limiting factors. And the OP obviously is, or he wouldn't have started this thread.
Starting a thread asking advice = knowledge of limitations? That's a pretty optimistic view of people starting threads. I wonder if we have examples of people starting threads not knowing limitations, lol yes every minute on here. Half the time that is why they start threads.
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Old 03-03-2010, 12:22 AM   #16
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Quote:
Originally Posted by talvai View Post
Why smaller turbo? Maybe due to the fact that he said he has a power goal 325-350whp which many smaller(and cheaper) turbos can accomplish.
Not if you read closely:

Quote:
Originally Posted by Obababoy View Post
with a goal of 325-350whp to prolong the life of the butter clutch that I have for now
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Old 03-03-2010, 08:05 AM   #17
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Quote:
Originally Posted by NSFW View Post
Not if you read closely:
Again not stating his ultimate goal so smaller turbo will accomplish that. How do I know for now doesn't mean he/she wants 700whp in future? Will a gt30 do that? Again lack of information given hence why we said certain things.
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Old 03-03-2010, 10:25 AM   #18
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Old 03-03-2010, 09:16 PM   #19
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at 17psi it would give you a pressure ratio ~2.15 so if you plot if on your map with your airflow ~33-40 lbs/min you will see that you can get a turbo that is more efficient at your power goals and not getting near the choke limit.

im just sayin
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Old 03-03-2010, 09:56 PM   #20
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GT3071 would be better choice
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Old 03-05-2010, 08:46 AM   #21
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I want to thank everyone for responding..I appreciate all comments even those stating to get a smaller turbo, but I want to be around 400whp in the future, but for now I am looking for 325-350 give or take...

Quote:
Originally Posted by NSFW View Post
You mean for the power goals he has for the near future, or the power goals he has for after he gets his clutch upgraded?

OP: I hit 15psi at around 3500 RPM with my ATP 3076. Your setup would probably behave similarly.

I had my ATP 3076 limited to about 10psi for a few weeks after my stock clutch started slipping (it hit 10 at about 3200 rpm). That got me around 250 whp, pretty similar to my 'stage 2' setup but the power came on much later - power basically increased linearly from idle to redline. I'm basing the 250 figure on MAF, relative to the MAF and dynoed HP from my 'stage 2' setup.

It only slipped around peak boost (which was 23psi) and 3rd gear or higher, so it probably could have held 18 or maybe 20 psi, but I wanted the car to be reliable until I got the clutch swapped.

I'm guessing that 17psi would put you around 300-325 hp and tq. Also guessing based on MAF and some old logs. I still need to get my ATP dynoed.

If you know that's the turbo you want in the end, I say go for it. Even at limited boost it will be a significant upgrade from stock. When you get your clutch upgraded, it'll be another significant upgrade. The only catch is that if you're not tuning it yourself you'll end up paying to get it tuned twice. If you don't make any changes between tunes (other than the clutch of course), maybe you can get your tuner to give you a discount since some of the work will already be done during the first tuning session.
Awesome thanks for that info...thats exactly what I was looking for on this post I will mention to my tuner and he will probably assume that ill be needing multiple tunes.

Quote:
Originally Posted by the suicidal eggroll View Post
I was hitting 340whp at 16.5 psi on my 30r.
After the motor build (cams + 8.9 compression), I'm now hitting around 360whp at 15 psi.

Just to give you an idea of the [very rough] mrp required for a given power level on the 30r.
340 at 16.5psi...thats pretty damn good.. did you have meth and what type of fueling?

Quote:
Originally Posted by trick3d View Post
^+ that and not to mention the increased stress on your gears etc. Got that ppg gear set lined up?
No ppg lined up yet but it is on my mind

Quote:
Originally Posted by talvai View Post
The problem with getting a new clutch on a stock tranny is your going to cause more shock and stress to the gears, having a better chance to fail. The slipping the stock clutch is what saves a lot of people from breaking the gears. So this is a catch 22 here. One hand you get a better clutch to help you put the power down at the cost of possibly breaking your gears or you keep your stock clutch causing some slip at times but saving your gears.
Otherwords if you want to put power down as your first mods that is fine but your going to have to do drivetrain at some point or another, you can't just push the tranny to the side, cover your ears and say lalalalala all the time cause at some point or another your going to break them. As somebody mentioned if you have PPG lined up thats the wrong approach. Find a gearset or tranny that suits you. PPG and sti transmission is not for everybody. Might it work for you sure, but it doesn't meet everybody needs 100% of time. That is a whole another huge story and I would tell you to start reading threads now on that.

But answer to your question is if you want 325-350whp a vf turbo or 16/18g may get what your looking for better. gt30 is a turbo that will put around 375-400 more at the cost of a little more lag then those other turbos.gt30 will be hard on your stock gears and not to mention gt30 might be hard on some internal parts of engine. Things like ringlands if not tuned 100%. These are all side things you need to consider and have saved up for incase. You can't just pick a turbo, put it on and not have things to support it.
"So this is a catch 22 here" <-- OP hates these, its like having a girlfriend.. but seriously when its time for a new tranny I would probably get ppg and put them in my 5 speed...I dont think i'd need the sti box.

But I understand why your rec. a smaller turbo, just note that I have the big snail with all supporting mods sitting in my living room waiting for a sunny couple days...

Quote:
Originally Posted by NSFW View Post
Am I the only one who read the OPs post and figured out that he is going to upgrade his clutch later?

What is the deal with all these recommendations for smaller turbos? Do you guys figure it's better to upgrade the turbo twice? That's a waste of time and money. You can put parts on in any order, as long as you are aware of the limiting factors. And the OP obviously is, or he wouldn't have started this thread.
Thanks for backup

Quote:
Originally Posted by talvai View Post
Why smaller turbo? Maybe due to the fact that he said he has a power goal 325-350whp which many smaller(and cheaper) turbos can accomplish. Now if it is like you said wants to detune and have it for later use so he doesn't pay twice and worry about everything else later then he can do that as well. So in a way everybody was trying to help him out by saving him some money and not waste it on a turbo that he wont fully use if he doesn't have a plan. Yes you can put parts in any order your heart wants but their are smart ways or doing thing and half ass ways of doing things. If you said am getting a gt40r with stock exhaust then am sure you would say something, why? Cause no benefit without an exhaust and million other things. We are also trying to give him heads up on his drivetrain in case he didn't know about it that as well. So again forum is not being a smartass just trying to give him some useful advice. His question was answered that he originally asked but got some more information to help him out. If you asked if jumping off a bridge backwords would work and we all said yes, wouldn't you like to know that the sudden stop at the end might not be a good idea. Don't take this the wrong way am not trying to get against you, but don't appreciate when people say just answer the damn question when the person asking might not know everything about what he/she planning to do. Otherwords were just trying to help him/her out. Now if they don't care for our advice or warning that is a different story.
and I appreciate all advice...I should have mentioned my end goal so ill throw out a rough 400/400whp goal for the future. drivetrain, yes I understand its not going to last...Most manufaturers build things roughly 15% stonger than its normal use to A: make it last longer under normal conditions and B: Save on costs R/D etc etc by not making it able to handle say 50% more harshness (totally made that up but its probably true so correct me if im wrong). I will be well over that and have accepted the costs. This is a passion/hobby of mine that I dont mind learning from and putting money into.

Quote:
Originally Posted by Csquared33 View Post



at 17psi it would give you a pressure ratio ~2.15 so if you plot if on your map with your airflow ~33-40 lbs/min you will see that you can get a turbo that is more efficient at your power goals and not getting near the choke limit.

im just sayin
Im new to maps but at 17psi with what you mentioned...I should have efficiency rating of about 78%? or do I not follow that line where 78% is down to where my settings will be? I understand if you dont want to clarify that for me and there are threads on maps, but seems like turbo will perform pretty well but not 100% at 325-350whp range? Thank you for that

Last edited by Obababoy; 03-05-2010 at 08:52 AM. Reason: we all make mistakes..
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Old 03-05-2010, 10:45 AM   #22
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Quote:
Originally Posted by Obababoy View Post
340 at 16.5psi...thats pretty damn good.. did you have meth and what type of fueling?
No meth, 93 octane. That was on a dyno dynamics. I was running into boost control problems so 16.5 is the highest I got on that day. Afterward I switched to an MBC and got the boost straightened out, but never made it back to the dyno.

Here is the dyno, on spoolup the boost spiked to about 22 psi, then plummeted to about 15. By 6000 RPM it was back at ~16.5 psi.
http://www.thesuicidaleggroll.com/ho....2008_dyno.jpg

Last edited by the suicidal eggroll; 03-05-2010 at 10:54 AM.
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Old 03-05-2010, 11:29 AM   #23
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Quote:
Originally Posted by the suicidal eggroll View Post
No meth, 93 octane. That was on a dyno dynamics. I was running into boost control problems so 16.5 is the highest I got on that day. Afterward I switched to an MBC and got the boost straightened out, but never made it back to the dyno.

Here is the dyno, on spoolup the boost spiked to about 22 psi, then plummeted to about 15. By 6000 RPM it was back at ~16.5 psi.
http://www.thesuicidaleggroll.com/ho....2008_dyno.jpg
my tuner said that he will try using the utec to control boost, but if that doesnt work too well then he'd put in an ebc that he has in stock...I wont be going over 16.5 psi I dont think, but we'll see.
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Old 03-05-2010, 11:34 AM   #24
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Quote:
Originally Posted by talvai View Post
How do I know for now doesn't mean he/she wants 700whp in future?
Because he bought a GT3076R.
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Old 03-06-2010, 12:57 PM   #25
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NSFW: So my setup does not use the blow through maf but it does have a big maf extension piece for the cold air intake that goes right in front of filter..I did get a 50/50 txs bov, but i pretty much need to have sensor closer to intake manifold in order for that to not cause drivability issues between shifts...with that said, since im not going over 20psi for now, will the stock bpv be sufficient?

Also the SS oil inlet line for turbo does not have the banjo fitting to mate up to my WRX(I bought perrin's kit) Perrin charges like 70bucks for this little line...can I just buy the banjo thing at an autoparts store or somewhere cheaper? if so what am I looking for

Anyone else feel free to chime in...
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