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Old 10-23-2006, 02:02 AM   #1
Dyno Flash
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Default Element Gt52 tuning notes - great unit

Tonight I was tuning a 2006 STI with the following mods

Gt52 Turbo
TX's fmic
850 injectors
Walbro 255 pump
3" exhuast

Dyno Flash custom reflash tune

What a nicely balanced turbo this is

First full pull after some initial dialing in was at 20 psi and the Tq curve was a nearly FLAT 350 on a dyno dynamics dyno

Sadly, with 21 psi I maxed out the stock mass air flow meter - 370 whp and a really nice looking power curve

I am ordering a BIG MAF for the customer tomorrow and will see what it maxes out at in the next few days.

It looks like a nice 375 whp pump gas tubro with 15 psi of boost at 3600 and 21 psi at 4100 rpms

Basically my summary is a turbo a bit laggier than stock but which can pull hard all the way to red line while bolting into the stock location with miminal effort

I, personally, would not look to run one of these up way high in the boost and try and squeeze out over 400 whp - there are better choices if you want that kind of power

This is a great turbo for someone who does not want to radically transform the driveability and spool up of the stock unit while eveing out the power band on top and picking up a solid 50 - 60 whp from 5,000 to red line

When I am done on the BIG MAF I will post dyno comparison of stock vs this one
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Old 10-23-2006, 06:49 AM   #2
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how would you compare it to a green or sz49.
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Old 10-23-2006, 08:11 AM   #3
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Here's mine, next to the stock VF39

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Old 10-23-2006, 08:32 AM   #4
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ahh..nothing prettier than a nice shiney new turbo
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Old 10-23-2006, 09:19 AM   #5
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Thats really high. With those minimal mods theres no way to hit 370whp on a DD dyno.

What correction factor are you using?
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Old 10-23-2006, 09:27 AM   #6
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aparently the dynodynamics these days are reading pretty close to dynojets.... so that might explain things a bit...
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Old 10-23-2006, 12:43 PM   #7
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This DD dyno is at zero correction and was calibrated by the factory rep only 3 weeks ago

The big issue I would say is what a VF39 does on THIS dyno compared to the Gt52 unit

The stock turbos nose dive after 6,000 in tq and whp and the GT52 is not only making 50 more whp - it holds it and is rising higher to red line (at least at 21 psi)
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Old 10-23-2006, 12:58 PM   #8
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Oh ok. Then that DD must read really high from the factory then cause there is definitely no way to hit that number with those little mods.
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Old 10-23-2006, 01:08 PM   #9
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Quote:
Originally Posted by Dyno Flash View Post
This DD dyno is at zero correction and was calibrated by the factory rep only 3 weeks ago

The big issue I would say is what a VF39 does on THIS dyno compared to the Gt52 unit

The stock turbos nose dive after 6,000 in tq and whp and the GT52 is not only making 50 more whp - it holds it and is rising higher to red line (at least at 21 psi)
So..... What does a stock sti make on this dyno?
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Old 10-23-2006, 05:21 PM   #10
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I have been posting this for months... The Dyno dynamics dynos no longer read low.. A huge amount of complaints from Dyno owners caused the company to cave in and raise the calibration. Remember guys.. A dyno is a marketing tool just as much as it is a tuning tool.. You read that this turbo made 370 and you buy this turbo..

The Dyno dynamics is a great dyno. I love them.. But rest assured they no longer read super low.. I tested this the same day with the same car.. Dynjet read 4whp higher... Mustang read 35 lower then Dynodynamics..As the cars go up in power the differences are greater.

Good job Al!

Clark
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Old 10-23-2006, 05:36 PM   #11
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Quote:
Originally Posted by AZScoobie View Post
I have been posting this for months... The Dyno dynamics dynos no longer read low.. A huge amount of complaints from Dyno owners caused the company to cave in and raise the calibration. Remember guys.. A dyno is a marketing tool just as much as it is a tuning tool.. You read that this turbo made 370 and you buy this turbo..

The Dyno dynamics is a great dyno. I love them.. But rest assured they no longer read super low.. I tested this the same day with the same car.. Dynjet read 4whp higher... Mustang read 35 lower then Dynodynamics..As the cars go up in power the differences are greater.

Good job Al!

Clark

I agree

In fact I was wondering to myself what Shiv was whining about with his "moon" dyno after playing with this DD it seemed right on the Dyno Jet money

In fact my STI made the same 320 whp on this dyno and Pruven's Dyno Jet

The main function of any dyno is to use it as a TOOL OF COMPARISION to see how parts and tuning changes effect the power

It is silly to compare one dyno's results to another one - epsecially on this kind of dyno which can change the power number with a click of a mouse

I will post the comparison between this car and a stock vf39 STI later tonight - that should clarfiy a few issues

Al
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Old 10-23-2006, 06:02 PM   #12
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Quote:
Originally Posted by AZScoobie View Post
I have been posting this for months... The Dyno dynamics dynos no longer read low.. A huge amount of complaints from Dyno owners caused the company to cave in and raise the calibration. Remember guys.. A dyno is a marketing tool just as much as it is a tuning tool.. You read that this turbo made 370 and you buy this turbo..

The Dyno dynamics is a great dyno. I love them.. But rest assured they no longer read super low.. I tested this the same day with the same car.. Dynjet read 4whp higher... Mustang read 35 lower then Dynodynamics..As the cars go up in power the differences are greater.

Good job Al!

Clark

Please keep it up. I have read several of your posts saying this, and yet i still look for what type of dyno someone dynos on to see if it is/was the lower reading dyno.

I guess i just have it engraved in my head to expect lower numbers out of DD and Mustangs.
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Old 10-23-2006, 10:50 PM   #13
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Still a great turbo
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Old 10-24-2006, 02:22 AM   #14
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on SHIV's DD a fpgreen (non8cm) makes around 370whp with a FMIC and MODS above but this was on 100octane. what will your gt52 make on 100octane on your DD dyno.

i'm just trying to compare turbos; gt52, fpgreen, gt30r. ive heard alot about your turbo having LOTS of power and minimal lag. i had a gt30r and green and the spool up with those were close.

so does the gt52 have the kinda power a gt30r will have on your DD which can make +400whp on our local DD. if so then i believe a gt52 being a stock mount turbo beast is something i need to look into.

now that the fpgreen 8cm is now available the three turbos above are the turbos for the street imo. but being rotated makes me sweat more every time a cop is around me while driving

so what would you think a gt52 can make tuned on 100 octane do on your DD whp??
on a DD a gt30r can hit 400whp with a .82 and maybe 380whp on a .63 A/R with sick spool up and a fpgreen 8cm can make 385whp both on 100octane. based on the numbers above it seems like the gt52 turbo can hang with a gt30r rotated on 100octane, but that's if this turbo shines on HIGH OCTANE gas.

Last edited by my_sti_1; 10-24-2006 at 02:29 AM.
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Old 10-24-2006, 07:35 PM   #15
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One redaction and modification to my previous post

I would NOT suggest this turbo without a EXTERNAL wastegate on a pump gas car

The set up is has on it with an apparent 19 psi gate spring boost creeps to 21 psi at red line on this car

This car is making 350 whp on 93 pump gas with a fairly conservative tune

19 psi creeping up to 21 at red line

I would think an external wastgate mod would help matters
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Old 10-25-2006, 02:35 AM   #16
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Here is a fairly agressive Vf39 with top mount STI at 21 psi falling to 15 at red line

VS

The Gt52 at 19 psi creeping to just under 21 at red line on a very mild pump gas tune

You can see how the Gt52 is all busines after 4500

Its a really great turbo to drive on the street

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Old 10-25-2006, 02:38 AM   #17
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You know sti's can rev to 7k...


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Old 10-25-2006, 10:59 AM   #18
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Great job Al. It looks like this turbocharger was shipped with a 19 psi internal gate instead of the standard 10 psi gate. The 19 psi internal gate is what I run but you can't really run less than about 20-21 psi. The standard WG will let you run as little as 15 psi but it won't hold much more than about 19 psi. This turbocharger really shines in the 22-23 psi range due to the GT series compressor wheel.

Thanks,
Phil
www.elementtuning.com
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Old 10-25-2006, 12:32 PM   #19
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Quote:
Originally Posted by Element Tuning View Post
Great job Al. It looks like this turbocharger was shipped with a 19 psi internal gate instead of the standard 10 psi gate. The 19 psi internal gate is what I run but you can't really run less than about 20-21 psi. The standard WG will let you run as little as 15 psi but it won't hold much more than about 19 psi. This turbocharger really shines in the 22-23 psi range due to the GT series compressor wheel.

Thanks,
Phil
www.elementtuning.com
I think its good the way it is now

I will advise the customer about the lower spring watsgate actuator

I am hoping to do some water / alcohol injection on this car and get it into the close to 400 whp range

The dyno sheet does not really give justice to how well sorted and balanced this turbo feels on the street - it really transforms the STI without adding huge lag and making it unpleasnt to drive around town
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Old 10-25-2006, 12:33 PM   #20
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Quote:
Originally Posted by Swine View Post
You know sti's can rev to 7k...


We were using the wheel speed as the reference and not rpms so the rpms on the sheet do not line up 100%

Main thing is that both cars had same settings

The end of the pulls was 7,000 even


The tach sesnor on that dyno is temp broken
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Old 10-25-2006, 01:02 PM   #21
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Quote:
Originally Posted by Dyno Flash View Post
I think its good the way it is now

I will advise the customer about the lower spring watsgate actuator

I am hoping to do some water / alcohol injection on this car and get it into the close to 400 whp range

The dyno sheet does not really give justice to how well sorted and balanced this turbo feels on the street - it really transforms the STI without adding huge lag and making it unpleasnt to drive around town
It really is a great all around setup. It won't set any drag racing records but I think it's good enough that we'll be racing at Time Attack with it.

Thanks,
Phil
www.elementtuning.com
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Old 10-25-2006, 01:59 PM   #22
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I would say its a solid 11 second pump gas turbo - and is very pleasant to drive
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Old 10-25-2006, 05:49 PM   #23
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Quote:
Originally Posted by Dyno Flash View Post
I would say its a solid 11 second pump gas turbo - and is very pleasant to drive
Any odds on it making 11.5x or faster with A/WI (just for reference sake)?

offset
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Old 10-25-2006, 07:03 PM   #24
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I am sure it could be pushed to low 11's with the boost maxed out and a very agressive tune - however someone looking for the ultimate dra turbo will prob want to go larger

This is a good street and road racing set up
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Old 10-25-2006, 09:36 PM   #25
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so if you added some C16 where do you see it running??
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