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Discussion Starter #1
Manufacturer
Altered Atmoshpere Motorsports

Website
http://www.alteredatmosphere.com

Price
around $900 USD



this is my impressions of the Altered Atmosphere fuel return system for the Nissan 350Z.

David and Mike at AA were a pleasure to deal with on the phone and took our order without any problems and answered all our questions and concearns to the fullest. Shipment was fast! We had it at our doorstep in about 2 days.
First impressions of the kit were good, as it was packaged nicely and came with complete instructions for installation. The quality of the billet machined fuel rails is FLAWLESS and are almost to pretty to install in the car where they will never again be seen. AA really got a good product here and I hope they sell like hotcakes as there has been a big demand for a return style high volume fuel rail in the 350Z community. AA had enough courage and common sence to get off their butts and beat such companies like AEM and Aeromotive to the market with these bad boys. In fact I spoke with AEM back in May at SEMA and they were still 1 year away from production on their fuel rails, while the guys at AA were already hard at work testing and installing their own custom rails. The rails themselves are a bit pricey but if you buy the whole kit it becomes a BARGAIN for what you get.
The rest of the kit is well laid out and is the type you would normally see on VERY HIGH horspower cars, PERFECT for us!!
 

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The Aeromotive 1:1 fuel pressure regulator the kit comes with is BAD AZZ and will handle PSI from 40-70lbs. Very nice Quality part.
 

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The kit comes with every fuel line and fitting you need.This really saves you TIME and HASSLE piecing this kit together on your own. All fittings are of high quality Stailess steel braided line with billet aluminum fittings. This kit would cost ALOT more if you went to peice it together on your own, trust me. The simple fact that they figured out all the fittings,lengths and angles is priceless to me..Its so pretty you really dont want to even install it.
 

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They even threw in a fuel pressure guage for the regulator and a new "O" ring for the gas tank. They left no detail out and I am relly looking foward to installing this on my APS TT BEAST..

I think this kit coupled with some larger injectors and tuning we should see our target HP range easily. I give this kit a THUMBS UP

From DAKING350Z and MRC Motorsports.
 

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Cool , this is the setup I am also condering but am thinkin about leaving the APS 500ccs in place and relplaceing the Aeromotive RR unit with this:

http://www.cartech.net/fmu2020.htm

Are there an larger injectors which will plug into the APS harness or will you need to splice on new connectors?
 

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Discussion Starter #7
Originally posted by g3po@Oct 15 2004, 06:42 PM
Cool , this is the setup I am also condering but am thinkin about leaving the APS 500ccs in place and relplaceing the Aeromotive RR unit with this:

http://www.cartech.net/fmu2020.htm

Are there an larger injectors which will plug into the APS harness or will you need to splice on new connectors?

Thats basically what the unit comes with. Its a boost dependant fuel pressure regulator. The APS kit comes with the 255lph walbro and 500cc injectors. I would guess adding fuel pressure would make the injectors ACT larger than they are. As for splicing the injectors I really dont know what the harness wil accept but I do know APS has already began work on a fuel system upgrade for the 350Z. The current setup is good for 600 chp..550whp

http://216.242.145.16/products/product.phtml?p=10
 

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yeh , the main dif between the aeromotive and cartech is that the aeromotive is a fixed 1:1 , were as the cartech provides a tuneable slope and onset. The slope can be set very shallow , ie. 1.5:1. So yes the general idea woudl be to slight over pressure the 500cc. Same method as say the Vortech (with 8:1) , but not nearly as agressive a slope or as stressful a psi rise. I just kinda hate to toss out 6 perfectly good 500cc injectors. I am a little concerned with the ability for the Unichip to accruately modulate too larger an injector at low rpm/idle. II have a goal to still meet the CARB sniffer test in Cali. even with a the low CR and mild JWT cams.
 

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Congrats Julian...the AAM return system is quite comprehensive and the rails are beautifully crafted. A very nice addition to your Z.
 

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Wow that looks amazing. 2 questions:

What size fuel line is that?

What is the max injector size that will fit in the fuel rails?

Thanks -M-P
 

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I too have purchased this fuel system. I agree with everything Daking said....quality flawles stuff is the only way to describe it. :)

The fuel rail will support stock, or RC injectors up to at LEAST 750cc...since I know for certain they are the same sized body as the 440's. Phunk also installed the HKS 1000cc low impedence injectors as well. So it sounds like injector sizing shouldnt be an issue with this setup.

And yes...6ANS fittings. :)
 

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Thanks alot for all the info. This def seems to be the fuel system to get.

M-P
 

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AA will always have my business. While they were doing my ECU reflash Mike himself took me back and showed me the Fuel Rails being made. Very nice piece of machinery i might add. Once i go turbo i will have them do the install and add the fuel rails while they are at it. They also are working on their own pulleys.

They have a top notch shop and give top notch customer service.

LaterZ
Aceman
 

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Julian,

What's your take on the news of APS's new fuel management system? Thinking of switching when it's available?
 

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Discussion Starter #16
Originally posted by cedusett@Oct 29 2004, 08:19 AM
Julian,

What's your take on the news of APS's new fuel management system?  Thinking of switching when it's available?

The APS in all likely wont be to much more extensive.Most likely it will have additional injectors in the plenum and utilize the same comonents in the APS kit.The only thing I would see them doing is boosting the fuel pressure to the rails and maybee adding a line to the new injectors..Should be compatible with what I have now.. :thumbsup:
 

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I got my fuel system yesterday and dropped it off at the shop . Fuel rails are PRETTTTTTTYYYYY . Very nice set up . Can you tell me exactly what alterations have to be made to the Walbro fuel pump to ge it to drop in ?
 

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Discussion Starter #18
Any import tuner shop that has done one befor should be fine..Its very minor fitment issues and all to the stock fuel pump housing..No big deal.
 

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Originally posted by booger@Nov 20 2004, 04:04 PM
I got my fuel system yesterday and dropped it off at the shop . Fuel rails are PRETTTTTTTYYYYY  . Very nice set up . Can you tell me exactly what alterations have to be made to the Walbro fuel pump to ge it to drop in ?

You will need to take a dremel and grind down the base of the fuel pump. You will also need to grid away at the plastic slip that holds the fuel pump inside the fuel-pump assembly. It's a bit of exerimentation. Essentially, you keep kinding away until you can get it to fit. It's tight..but it fits.
 
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