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Old 03-23-2009, 04:22 PM   #1
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03 Aero Questions

I am going to be upgrading my 03 Aero to a GT2871r turbo... we are not entirely sure about the fuel injectors and fuel pump at this point.

what are the stock injectors rated to? what is an option for an upgraded injector that will drop in? is there a drop in higher flow fuel pump, or is it even really needed at this point?

Sorry, just a little unsure about what the stock stuff can handle.
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Old 03-23-2009, 09:23 PM   #2
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Originally Posted by Robgrover View Post
I am going to be upgrading my 03 Aero to a GT2871r turbo... we are not entirely sure about the fuel injectors and fuel pump at this point.

what are the stock injectors rated to? what is an option for an upgraded injector that will drop in? is there a drop in higher flow fuel pump, or is it even really needed at this point?

Sorry, just a little unsure about what the stock stuff can handle.
Hi, nice to see some non std turbos flowing in to the 9-5s as well.

Are you going to use the stock exhaust manifold?

As for your questions, i'd say that you need to upgrade your injectors to the 630cc siemens deca. For your 03 aero it is quite a straight forward swap, you need few spacers to where the fuel rail is connected to the intake manifold but thats about it.

Then you also need a tune for that particular combination.

The disco-potato is going to ge you around 350hp so i'm not quite sure about the need to change the pump. If you do want to upgrade that as well i think the walbro 255 is bit more tuner friendly setup. You can see the changed required for the bosch 044 on my thread. Though the walbro will be noisier than the bosch, you can clearly hear that pump inside and outside the car.

Aero having the 240mm clutch by default might just cut it without changing it as long as the tune is not nuts.
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Old 03-24-2009, 02:28 AM   #3
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Originally Posted by lekonna View Post
The disco-potato is going to ge you around 350hp so i'm not quite sure about the need to change the pump.
FYI Lekonna, the disco-potato is a GT2860RS. Even then, 300 hp is the absolute max for the standard fuel system, pump and injectors. I highly recommend shoehorning in a Walbro 255HP or something similar for a GT2871R. I also second the Siemens 630cc injector recommendation.

And Rob, I just want to check, you're aware that you're going to need new pistons for this turbo, right?
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Old 03-24-2009, 02:35 AM   #4
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And Rob, I just want to check, you're aware that you're going to need new pistons for this turbo, right?
thanks for the disco potato point man, did not read the numbers through once again.

about the pistons,
this is depatable , depending on the tune. I've yet to see PROPERLY tuned t7 pistons to fail. Though what i've seen is failed t5 pistons in t7 machine because of bad tune.

doesn't hurt though, besides your wallet.
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Old 03-24-2009, 02:55 AM   #5
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Originally Posted by lekonna View Post
thanks for the disco potato point man, did not read the numbers through once again.

about the pistons,
this is depatable , depending on the tune. I've yet to see PROPERLY tuned t7 pistons to fail. Though what i've seen is failed t5 pistons in t7 machine because of bad tune.

doesn't hurt though, besides your wallet.
Have you seen a properly tuned T7 with standard pistons put down more than 400 hp? Cause if you have I really want to see it.

I agree that a bad tune can break pretty much any engine. I also think, and this is just my opinion, that a lot of the failures we see with stock pistons are related to fuel issues. I think most stage 3 aero tunes are pushing the stock fuel system beyond it's safe limits. The first line of defense the T7 has against knock is fuel enrichment, extra fuel capacity is an absolute must in my mind.
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Old 03-24-2009, 03:30 AM   #6
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Have you seen a properly tuned T7 with standard pistons put down more than 400 hp? Cause if you have I really want to see it.

I agree that a bad tune can break pretty much any engine. I also think, and this is just my opinion, that a lot of the failures we see with stock pistons are related to fuel issues. I think most stage 3 aero tunes are pushing the stock fuel system beyond it's safe limits. The first line of defense the T7 has against knock is fuel enrichment, extra fuel capacity is an absolute must in my mind.
true,
2871 will not put down 400hp. this turbo as such is almost beyond ridicilous with the limited turbine of the 28 that will create huge back pressure to the system and it will be mostly exhaust pressure driven system right from the spool up. So in this light i might consider the pistons on this application.
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Old 03-24-2009, 04:14 AM   #7
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Originally Posted by lekonna View Post
2871 will not put down 400hp.
Yes it will, it's already been done. Nick T did it. Yes he put down more with a 3071, but the 2871 does work. My friend is putting a 2876 on his 9000, can't wait to see the results.
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Old 03-24-2009, 05:12 AM   #8
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I highly recommend shoehorning in a Walbro 255HP or something similar for a GT2871R.

if its the turbo that i think that u are looking at ( from al) he also has the listed pump from above
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Old 03-24-2009, 03:55 PM   #9
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if its the turbo that i think that u are looking at ( from al) he also has the listed pump from above
Yeah it is the one from Al, I will have to check into the pump.

For Verification on injectors.
http://www.intengineering.com/VW/18T...-p3471089.html
These will work with the spacers from genuine saab correct?

Also, I was looking at a JT 3 inch exhaust, but since I live in Minnesota and they are prone to rusting, what are my other options for a performance exhaust (beyond creative welding)?

Last edited by Robgrover; 03-24-2009 at 07:07 PM.
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