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Old 02-18-2009, 09:49 PM   #1
Equilibrium Tuning
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Default GT3071 .63 a/r Perrin Kit, VP109, 25psi 436whp!

This is one of my first projects that we finally re-visited. This car is now running a short-block with stock heads. We've refined the blow-through MAF setup and the CAI. We also dumped the EWG to atmosphere for a bit more power and a lot more noise .

Mods:

Perrin GT3071 .63 a/r rotated kit
Perrin FMIC
Greddy SP2 Catback
Deatschwerks 850cc injectors
Hallman MBC
EQ Tuning Custom Tune on Cobb AP V2

Tuned on VP 109 at 25psi. This is a track tune so it was left nice and safe.



This car is hitting 25psi by 3400RPM and considering the awesome response, this power is amazing! I honestly thought this turbo would choke out around 400whp, but it didn't take much fuss to make this power. I think with a more agressive tune and some more boost, this thing could make around 460-470whp. As it stands now, it burns through 1st and second and gives a healthy chirp into 3rd

Thanks
-- Ed
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Old 02-18-2009, 09:55 PM   #2
k04sti
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Wow. Nice setup. I was thinking about doing a rotated 3071 and a spearco setup.
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Old 02-18-2009, 10:00 PM   #3
juanmedina
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that crazy number for your software dyno and it has a decent top end for having a .63 A/R. Nice and it spools like a VF39 with a front mount what more could you ask for? thats better than a Twinscroll.

How does it spools so fast? TGV deletes. Do you think it will make more power on E85, god I need a good tranny
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Old 02-18-2009, 10:07 PM   #4
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Built shortblock - wrx or STi? If its burning through 1st and 2nd.... Im guessing STi

Looking good, Ed!
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Old 02-19-2009, 12:54 AM   #5
PikkaGTR
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holy baby jebus
Thats a clean power curve
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Old 02-19-2009, 01:22 AM   #6
Phatron
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what size inlet do the 3071's come with? 4"?
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Old 02-19-2009, 01:41 AM   #7
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Sweet Numbers
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Old 02-19-2009, 01:56 AM   #8
Infamous1
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Very nice!
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Old 02-19-2009, 01:58 AM   #9
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Very nice!
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Old 02-19-2009, 02:34 AM   #10
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what kind of AFRs did you target for the safety?

VP 109 is unleaded, right?

Good work Ed!!
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Old 02-19-2009, 09:44 AM   #11
wrxhard
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Quote:
Originally Posted by Phatron View Post
what size inlet do the 3071's come with? 4"?
It has 3 available sizes that i'm aware of, 4", 3" and 2.75"
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Old 02-19-2009, 11:05 AM   #12
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So on crappy 91 gas and alky that thing should do at least a solid 400 whp.

Sweeeeeeeeeeeeeeeet.
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Old 02-19-2009, 11:36 AM   #13
Equilibrium Tuning
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Quote:
Originally Posted by juanmedina View Post
that crazy number for your software dyno and it has a decent top end for having a .63 A/R. Nice and it spools like a VF39 with a front mount what more could you ask for? thats better than a Twinscroll.

How does it spools so fast? TGV deletes. Do you think it will make more power on E85, god I need a good tranny

It does have TGV deletes but they're not heavily ported. There's really a lot more to be done on this car. VP109 is great gas... especially unleaded. I don't think it would make any additional power on E85 unless we ran more boost.

-- Ed
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Old 02-19-2009, 11:37 AM   #14
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Quote:
Originally Posted by subenerd View Post
Built shortblock - wrx or STi? If its burning through 1st and 2nd.... Im guessing STi

Looking good, Ed!
This is an 06 STI... forgot to mention.

-- Ed
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Old 02-19-2009, 11:39 AM   #15
Phatron
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Quote:
Originally Posted by LittleBlueGT View Post
So on crappy 91 gas and alky that thing should do at least a solid 400 whp.
i think it will still fall 20-30whp short on 91+meth
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Old 02-19-2009, 11:40 AM   #16
Equilibrium Tuning
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Quote:
Originally Posted by Phatron View Post
what size inlet do the 3071's come with? 4"?
This one has a 4" inlet but its getting necked down to 3" for the CAI. For a while we were running just a 4" elbow and a K&N (short ram style). The response on this setup was good but we were getting excessive compressor surge. Once we necked down the intake to 3" and extended it into a CAI, things got a lot smoother and most of the surge was gone. I was also surprised to see very little to no loss in response.

-- Ed
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Old 02-19-2009, 11:43 AM   #17
Equilibrium Tuning
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Quote:
Originally Posted by benw View Post
what kind of AFRs did you target for the safety?

VP 109 is unleaded, right?

Good work Ed!!
VP109 is unleaded but I find it to run better than C10. It also has a high O2 content, so it likes to be run a bit on the rich side. This tune settled in at around 11.3:1 to make for a nice safe, consistent track tune.

Thanks
-- Ed
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Old 02-19-2009, 11:44 AM   #18
Equilibrium Tuning
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Quote:
Originally Posted by LittleBlueGT View Post
So on crappy 91 gas and alky that thing should do at least a solid 400 whp.

Sweeeeeeeeeeeeeeeet.
While I think it could do 400whp on 91 + meth, the tune would have to be on the aggressive side to do so.

-- Ed
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Old 02-19-2009, 12:10 PM   #19
Phatron
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what kinda timing you running on this?

i think i was up to 20-22* at peak tq up to 28-30* at redline on my 100oct+meth map
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Old 02-19-2009, 12:11 PM   #20
cellgeek101
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Awesome numbers!! The 30R turbos always amaze me! With a good selection of mods and a fantastic tune, these things must move!
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Old 02-19-2009, 12:12 PM   #21
kellygnsd
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Quote:
Originally Posted by juanmedina View Post
that crazy number for your software dyno and it has a decent top end for having a .63 A/R. Nice and it spools like a VF39 with a front mount what more could you ask for? thats better than a Twinscroll.
How does it spools so fast? TGV deletes. Do you think it will make more power on E85, god I need a good tranny
Better than a twinscroll what? Twinscroll GT35 maybe but a twinscroll 3071(which I haven't seen) would spool even better.
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Old 02-19-2009, 12:17 PM   #22
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Wow Ed, terrific for a .63. I would assume on your dyno it would hit right above 400 then taper to 385 ish, but that sucker looks like it wants to keep going!!!

What are you thinking here, 124-126 traps??
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Old 02-19-2009, 12:23 PM   #23
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Very nice numbers

Quote:
... and most of the surge was gone.
Ouch! What would it take to eliminate ALL of the surge? Is the surge because the GT3071R .63 comes on too fast down low? Maybe going to a GT3071 .82 or GT3076 .63 would be enough of a step to eliminate surge?

Surge sucks! I like to be able to go WOT at 2500rpm in 5th without having to worry!

Thoughts?
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Old 02-19-2009, 12:30 PM   #24
Equilibrium Tuning
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Quote:
Originally Posted by Tuner1 View Post
Very nice numbers



Ouch! What would it take to eliminate ALL of the surge? Is the surge because the GT3071R .63 comes on too fast down low? Maybe going to a GT3071 .82 or GT3076 .63 would be enough of a step to eliminate surge?

Surge sucks! I like to be able to go WOT at 2500rpm in 5th without having to worry!

Thoughts?
I'm just talking about surge when letting off the throttle. Even with the Tial BOV, we were getting hard surge when letting off from higher boost levels. We played with different springs in the BOV but could not eliminate the problem until we necked down the intake.

-- Ed
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Old 02-19-2009, 12:32 PM   #25
Equilibrium Tuning
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Quote:
Originally Posted by STi Mikey View Post
Wow Ed, terrific for a .63. I would assume on your dyno it would hit right above 400 then taper to 385 ish, but that sucker looks like it wants to keep going!!!

What are you thinking here, 124-126 traps??

Yea that thing keeps pulling... we actually did a few pulls to 7400RPM and it pulls quite well the whole way. If we ran higher peak boost levels, the powerband shape would be more like you describe, peaking earlier and leveling out or dropping off up top.

124-126mph traps sounds about right for this power.

-- Ed
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