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Old 10-18-2005, 06:21 PM   #1
SloRice
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701whp 9.91@146

Default PDX In Texas Dyno Graph Comparison - Green vs. 20G

Since I'm turbo shopping right now, and these two turbos are on my list, I wanted to see how they compared. So I took both graphs from these two threads (http://forums.nasioc.com/forums/showthread.php?t=867564 , http://forums.nasioc.com/forums/showthread.php?t=867872) and compared the numbers. All I did was "eyeball" the lines for horsepower and then calculated torque to make sure my numbers were correct. They are pretty close, but not exact. But it shows a good comparison between the two turbos on the same dyno as these cars have almost the same mods. Anyways, just thought I'd share my info.

"I've given you a topic, now talk amongst yourselves." - Church Lady

Blue Lines
2004 STi with 15000 miles:
-Engine mods-
*FP20G with 3" inlet
*Perrin modded STi injectors
*Perrin 3" inlet hose
*Perrin fuel rails
*Perrin FMIC
*Perrin big MAF
*Perrin crank pulley
*Walbro 255 pump
*APS tgv delete kit
*Injen catless DP
*HKS carbon/ti catback
*ECUtek
*One step colder plugs
*Turbo XS DTEC BC Pro

Orange Lines
2005 STI with 8400 miles:
*FP Green with 3' inlet
*Perrin mod injectors
*Perrin 3' inlet hose
*Perrin limits edition FMIC from PDX
*Perrin big maf
*High pressure fuel pump
*APS tgv delete kit
*C0bb catted dp*****
*Cobb cat back
*Cobb ap with Pro tune
*One step colder plugs
*Avc-r boost contoler

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Last edited by SloRice; 10-19-2005 at 09:22 AM.
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Old 10-18-2005, 06:26 PM   #2
glilly
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Thanks for posting this, ...Adam and I were gonna do the same.

Greg
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Old 10-18-2005, 06:32 PM   #3
SloRice
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I would also be interested in seeing boost pressures and AFR's for both of these cars. I'm guessing they are probably around the same as PDX tuned both cars.

Greg, I'm guessing you have a little boost spike that tapers off due to the increase in mid-range torque???
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Old 10-18-2005, 06:37 PM   #4
driggity
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Quote:
Originally Posted by SloRice
"I've given you a topic, now talk amongst yourselves." - Church Lady
That was the Coffee talk lady

The numbers below about 3800 RPM sure are surprising.
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Old 10-18-2005, 06:42 PM   #5
dudical26
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I thought the Green was supposed to spool later then a 20G ????
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Old 10-18-2005, 10:00 PM   #6
Adam P
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Quote:
Originally Posted by dudical26
I thought the Green was supposed to spool later then a 20G ????
Yea I also figured the green would spool later but it seems that the 20g will spool WAY more pressure where that peek in tq is for the 20g, but its tuned down alittle and it makes it appear to be similar.... Its a matter of pressure. I am making 1.45 bar or about 21.5 psi at max tx. Not sure what his pressure is but I think I am maxed out at that range or so.

Adam
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Old 10-18-2005, 10:50 PM   #7
Phil Jr.
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That graph doesnt make sense to me. It shows the FP20g making more torque than the green?
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Old 10-18-2005, 11:08 PM   #8
silentbob343
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it did. 355 to 342
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Old 10-18-2005, 11:16 PM   #9
SloRice
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I was reviewing my graph today before I left work and my torque spike for the 20G is a little to spikey compared to the actual graph. Tomorrow, I will modify it and post the corrected graph.

Church Lady - Coffee Talk Lady - they were all the same when I was 12
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Old 10-18-2005, 11:23 PM   #10
flycaster
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The bump @ 4,250 for the FP20G is interesting - I have not seen this before on the Matrix mustang. Kind of makes me wonder if the timing wasn't quite a bit more aggressive for the 20G vs. the Green. And, incidentally, that happens some times: some cars can take it and do just fine, others won't, and it ain't the turbo.

Also, these numbers (both turbos) are about 30 higher than PDX gets on the Matrix for these snails. Does anyone know what the STi baseline numbers are on this dyno? (And, no, not all mustangs are equal...not by a long shot)

Last edited by flycaster; 10-18-2005 at 11:34 PM.
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Old 10-18-2005, 11:39 PM   #11
Adam P
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I am the owner of the car with the green. I will back you up in stating that my car has alot less timing. I was told the car is "light on timing".

And I was told a stock sti on this dyno is around 230 or so.

Adam P

Quote:
Originally Posted by flycaster
The bump @ 4,250 for the FP20G is interesting - I have not seen this before on the Matrix mustang. Kind of makes me wonder if the timing wasn't quite a bit more aggressive for the 20G vs. the Green. And, incidentally, that happens some times: some cars can take it and do just fine, others won't, and it ain't the turbo.

Also, these numbers (both turbos) are about 30 higher than PDX gets on the Matrix for these snails. Does anyone know what the STi baseline numbers are on this dyno? (And, no, not all mustangs are equal...not by a long shot)
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Old 10-19-2005, 09:23 AM   #12
SloRice
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Edited my first post to change the graph to represent the 20G torque curve a little better.
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Old 10-19-2005, 10:12 AM   #13
silentbob343
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The green is 49lb and the 20G is 44lb correct?

odd that the 20G has an advantage in the 3800RPM to 4800RPM range.
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Old 10-19-2005, 01:25 PM   #14
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I think you could tune the Green to have more torque by advancing the timing. I know you could, but what's the point of having that low end torque if you are going to loose it. Personally I don't like driving cars that have a sharp torque peak.

I think the point here is that the Green does blow more air with the same hot side as the 20g. It makes sense doesn't it. You can also see, if you were to through an EWG on either car that more torque could be held out in high RPM because backpressure is robbing you of power up there. Check out the other Texas-PDX thread by the same guys with a Green and EWG.
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Old 10-19-2005, 02:13 PM   #15
SloRice
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bboy...do you have a link for the Green and EWG? I can't find it.
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Old 10-19-2005, 04:31 PM   #16
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Tim if you want, you can take my car for a spin.
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Old 10-19-2005, 05:02 PM   #17
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Also to note, this was on 93 octane, no? On the Matrix dyno they typically use 92 octane for pump fuel. Not a huge difference, but should be worth a wee bit of power when tuned for. A 3" inlet green ran 360whp at Matrix not too long ago, so I don't think low 370's is unreasonable with another point of octane... especially when accounting for other car-to-car differences.

Overall, great numbers... and it seems to be in the ballpark for Mustang Dynos.
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Old 10-19-2005, 05:41 PM   #18
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The dyno seem to read a bit high. A stock WRX baselined right at 200/200 on a different dyno day. That said, keep in mind both these turbos are the 3" inlets with TGV deletes, thus the green is spooling substantially earlier with the big inlet. I dyno-d my 2.4" green same day and made 25 less HP than adam and spooled later. Maybe I'll post the chart for you to overlay if I can ressurect my scanner.
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Old 10-19-2005, 09:37 PM   #19
SloRice
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Nathan, what is your mod list besides the standard inlet Green?
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Old 10-20-2005, 10:08 AM   #20
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2004 STI with 44000 miles:
*FP Green with 2.4" inlet
*Perrin mod injectors
*Perrin limited edition FMIC from PDX
*Perrin big maf
*High pressure fuel pump
*TXS catted dp*****
*ghetto cat back
*Cobb ST with Pro tune
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Old 10-20-2005, 10:46 AM   #21
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Baselines for FIS's dyno is ~170whp for a stock 2.0L WRX and ~250whp for a stock 2.5L STI
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Old 10-20-2005, 11:39 AM   #22
Phil Jr.
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what boost control did ya use nathan?
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Old 10-20-2005, 11:21 PM   #23
Adam P
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Quote:
Originally Posted by Phil Jr.
what boost control did ya use nathan?
He's on factory control...
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