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Old 09-09-2008, 09:29 PM   #1
DannyGrant
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Default 2007 STI, 20g vs FPgreen. Anyone have these?

I know this is probably a tired discussion over here. I'm about to purchase one of these, just don't know which one yet.

Right now I'm at 250HP with the following mods:
SPT intake
SPT exhaust
Cobb UP
Cobb DP
Access Port Stage 2 93 Octane Map



My goal is to break 300 with the following:
20g or FPGreen
255lr fuel pump
850cc injectors
custom 93 octane tune

But this is all besides the point. Take a look at my boost pressure here:



I'm at full spool on the first pull at 3300rpm. Here's my other goal: I don't care about top end power because my car will never see the track and I've never taken it over 120mph; however, I want more of the thrown back in your seat feeling, and I want it happen quick (low rpms).

Now my local tuner tells me that I will have the same spool on a 20g as a fpgreen. Somewhere below 4000rpm. He says the main difference is that the Green doesnt taper as much and holds boost better.

I trust what he says cause he's the expert but I'd like to know if anyone has had these turbos before and how they performed.

Right now I'm leaning toward the FP20g with 7cm port so I will spool even faster.
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Last edited by DannyGrant; 09-22-2008 at 08:59 PM.
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Old 09-09-2008, 09:34 PM   #2
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Old 09-09-2008, 09:49 PM   #3
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SPT makes a CAI thats news to me????

You have the SPT Power package from SOA. There is no such product as SPT TBE or SPT CAI.

<--Short Ram Intake

Yes that looks about spot on for the COBB OTS map 93oct

So if your not looking for top end power and never going over 120mph save your $$$$ and just get a Pro Tune and end up with like 308WHP/340WTQ and call it a day you'll have full spool down low and love the results. VF43 is one of my favorite low rpm turbo's.

I on the other hand am a boost whore and lag is really overrated.

In the end the SPT is going to choke your power, been there done that. Former SOA sucker purchase on the SPT Power Pack.

Last edited by 4ST-AIR; 09-09-2008 at 10:02 PM.
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Old 09-09-2008, 10:04 PM   #4
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..just get meth and turn up the boost on your stock turbo..
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Old 09-09-2008, 10:13 PM   #5
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Quote:
Originally Posted by mxpunk View Post
..just get meth and turn up the boost on your stock turbo..
Apparently your not reading his post. METH for 300WHP??? On a 07 STI

If your goal is only to break 300WHP you need to read before posting, hell your tuner should have told you this. Stage 2 with a Protune will easily get you over 300WHP/340WTQ on the stock VF43!!!! Drop in a 255FP, TBE (catless or catted) and enjoy. There is no need to buy a 20G or FPGreen for the power your looking for.

Even the very restrictive SPT will get you there. Here is my STI back on engine #1 Stage 2 - COBB 3" High Flow Cat with the SPT Power Package.


Last edited by 4ST-AIR; 09-09-2008 at 10:21 PM.
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Old 09-09-2008, 10:16 PM   #6
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yea idk how your sti was so low on a dyno my 06 with stock turbo, intake, exhaust ap st 2 put down 289
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Old 09-09-2008, 10:22 PM   #7
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Go dyno on a dynojet and you'll probably hit like 280. You could add a headers and try a retune to get around 300.
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Old 09-09-2008, 10:26 PM   #8
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4st,

he's on a DD, you're on a DJ.

my Green only put down 325whp on a DD on pump.
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Old 09-09-2008, 10:34 PM   #9
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Quote:
Originally Posted by Phatron View Post
4st,

he's on a DD, you're on a DJ.

my Green only put down 325whp on a DD on pump.
Ok I guess he didn't specify that he wanted it on a DD.

HAHAHA get Protuned on DYNOJET and call it a day P&L's is not that forgiving in my eyes always had me down on the lower end of power but Im not stuck on the #'s I know that if all 4 wheels are spinning in 2nd I'm putting down some good power
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Old 09-09-2008, 11:01 PM   #10
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yeah..dynowars is stupid..but it is what it is..some people care too much about that peak # vs what they actually gained.
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Old 09-09-2008, 11:09 PM   #11
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Thanks for the info guys. This will shurly aide in my decision.
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Old 09-10-2008, 12:12 AM   #12
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Quote:
Originally Posted by paikman View Post
yeah..dynowars is stupid..but it is what it is..some people care too much about that peak # vs what they actually gained.
Exactly! my favorite line "When you turn your car on, does it return the favor?"

If your driving your car and go WOT and there's no one around and you start to giggle like a school girl you know its good
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Old 09-10-2008, 12:18 AM   #13
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I say get the Green, You will get tired of the 20g quickly I'm afraid. IMO
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Old 09-10-2008, 12:59 AM   #14
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20g on an sti is for girls in my opinion- even the green will get a little old after a while like ALL setups- its never enough but like said above a good stg 2 tune should net the 300 power level on almost any dyno

and need i say avoid FP if u want your car setup in say 2008
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Old 09-10-2008, 01:56 AM   #15
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The Green is a better choice IMO
It holds boost to redline better and spool is relative
Depending on whose dyno you get tuned on 300whp is a vague description
There are 11sec STis which "only dyno" 340-350 whp on a low reading mustang dyno
and the ones that are on dynojets 340-350 whp run mid 12s
Just go with the biggest turbo you can live with and tune down the power
When you get bored retune for more boost/Meth
you can get the same power from a Green as a 20g but not the other way around
think about it
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Old 09-10-2008, 09:12 AM   #16
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Quote:
Originally Posted by STINOMORMONEY View Post
20g on an sti is for girls in my opinion- even the green will get a little old after a while like ALL setups- its never enough but like said above a good stg 2 tune should net the 300 power level on almost any dyno

and need i say avoid FP if u want your car setup in say 2008
Hmm.... I guess I am a girl..

I run an FP20G 7cm with an FMIC some 740's etc etc....
My car made 337whp on Jarrad's MustangDyno At PDX, and 340 at DynoAuthority in Redmond. A green on the same dyno at fame with a comparable setup made about 12 more whp.

Both were very agressive tunes, I am actually backing mine down a tad. I was getting some knock here and there.

First things first....
Absolute spool, IE what RPM I can hit target boost at, is not that far off of my protuned VF-39 setup, however two things are different.
1. The vf-39 ramp up was faster, meaning the time from when it started to spool and the time it hit full boost is faster. That thing was a pinwheel in a hurricane on a protuned stage two setup without cats etc etc.
- Note: this perception is skewed by my FMIC I put in with the green, I am just not sure how much it skews it.
2. Transitional boost response is slower with the 20G IE, the time from off boost to full boost at any rpm, much the same as above except at any rpm/load. (Now, I am not saying it is to slow, but it is slower)
3. IMHO the 20G is a great street turbo unless you want a drag turbo. That being said the green is a good choice as well. I am not sure what the other green spooled at by I can hit 15psi by 3k in 4+ gears.

The arguments here about holding boost to redline... On pump I don't see that as an issue. I am running wgdc's as low as 55% to maintain 19psi to redline. I used to run them a bit higher to run 20-21 through red-line, without an issue. Maybe if you wanted 23psi to redline it might start to heat up the air a bit, but I am not sure. Either way I don't feel on pump gas that this turbo is in danger of running out of air.

I think it is splitting hairs between these turbo's , 20G 7CM = A hair better spool...

I think your tuner really will be the biggest factor.

Worth noting, I do run gear based boost control DTEC so that may be a factor on why mine spools as fast as it does. I run some pretty heavy spool threshold / wgdc in the low gears. Then gradually back things down for the higher ones.

Not that I don't like my 20G but I would consider Meth and an aggressive tune over either of these choices if I had it to do again. My TMIC and 39 spooled like lightening, and I ran 296whp on Jarrad's Mustang with my stage II setup on 92 octane...pulling timing. In Florida I ran 301whp on Japtrix Mustang running 93oct. This was with no meth, so I probably would have been maybe 15-20hp shy of where I am now but with some killer bottom end snap. 20G kills the 39 on top end pull...
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Old 09-10-2008, 09:48 AM   #17
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When I had the FP Green, I made 402/441 on a dynapack with 104 octane unleaded. I made 350/391 on 93 pump. The dyno below is the picture from the race gas tune. I really liked the Green, but now that I have gone bigger, I am happier.

I ran 12.2 @112 on pump gas with this set up before I blew the ringland on cylinder #4. I never had a chance to run the race gas at the track.
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Old 09-10-2008, 10:04 AM   #18
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3inch inlet 20g 8cm a nice turbo

dave
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Old 09-10-2008, 12:21 PM   #19
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Quote:
Originally Posted by M.S.P.T View Post
3inch inlet 20g 8cm a nice turbo

dave
+1 on this combo
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Old 09-10-2008, 12:46 PM   #20
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I am no tuner or expert but I would think if you are going 3" inlet at least go bigger than a 20g. 52lb/min turbos are having great results (spool and powerwise). ATP's 3071 turbo is in the middle of 20g and green if you are thinking no larger than a green.

so many factors to consider are you going to go IWG or EWG, pump gas only forever?
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Old 09-10-2008, 03:54 PM   #21
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I've got a 7cm 20g 3" inlet - running IWG, with a perrin tmic - also have a built motor with some minor head work - and 100mm mahle pistons running 9:1 CR. I'm expecting it to spool pretty quickly : ) as soon as the new motor gets broken in I'm going back for my tune - maybe another 2 weeks. I'll put up a thread with more details then.
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Old 09-10-2008, 05:10 PM   #22
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People have been having a lot of failures with the fp green i wouldnt head in that direction if i were you especially if im tryin to spend 1300 on a turbo...get a blouch
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Old 09-10-2008, 05:28 PM   #23
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^^ Links to examples

I researched turbos for close to a year before i got my Green and never came across any Green failures.
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Old 09-10-2008, 05:57 PM   #24
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Quote:
Originally Posted by shutupnshift04 View Post
People have been having a lot of failures with the fp green i wouldnt head in that direction if i were you especially if im tryin to spend 1300 on a turbo...get a blouch
i feel like everyone on nasioc rinses and recycles everything they hear, whether its 2 years old to current date. Im sure the greens are fine, maybe 1-2 failed now its an epidemic.
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Old 09-10-2008, 05:57 PM   #25
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Sorry for the n00b question: When you say 3" inlet, does that refer to the up pipe or the intake where the air filter is?
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