I am building a high hp 996tt and need help with the above. Specifically:

What fuel line sizes are needed for flow & return for 1000bhp levels? I can source these if I need to but is there anybody selling these kits? Evoms would not sell their kit separate to a full tuning package .

I intend using an aeromotive pump but where do I coonect an inline pump like this to? Do I feed from the original pump in the tank or do I need additional feeds from somewhere? Any advice on required pressures before the regulator? Fuel filter changes?

Tried to attach a picture of current state. It needs a little work..........

Many Thanks.

 

Its not as simple as you think... one problem you will face is running the sponsons dry because the fuel cant get back fast enough....
You are undertaking a major project... I would consult someone who has done this...
I have it done but do not know the specifics enough to tell you...
good luck,
markski

 

Any tuners out there care to help out with this - either advice or products?

 

You need to pick up the phone (with credit card handy).

 

LOL...exactly.

 

I tried this but nobody would take my money! At least Evoms would not. Who else can supply an upgraded fuel pump and lines? TIA

 

You would need to do more than just a fuel pump and lines. Specifically you'd need to have the correct type of programming?

 

Its not just a fuel pump and lines. I think the the weakest link in the fuel system is the stock injectors. The OEM fuel pump and lines can exceed the capacity of the OEM injectors. Therefore, when upgrading the fuel system, one must include larger injectors. At this point, new/matching programming is essential. I suspect tuners are reluctant to sell you piecemeal equipment because, absent all the matching components and programming, the individual equipment is incomplete, inadequate and inoperative.

Craig

 

Also at higher horsepower levels the fuel rails also can become a restriction.

 

he really needs the whole set up.,.. but then what?

 

I spoke with TZ about this earlier today. We should have our new rails shortly.

Craig

 

I run -8 lines, dual feeds and a single return. I use twin Walbro 255 pumps, as well as twin rail's. I have 375cc injectors as my primaries, when boost starts coming on, I have 780cc injectors as my secondaries. The -8 lines become -6 into the quad rails. A much simpler and smaller setup previously made 714rwhp, I am now aiming for 900+rwhp. I also run a stand alone, and this may not be quite what you are looking to do with your 996TT.

As for what type of fuel pressure, on most boosted cars I have worked on I set base pressure between 38-42psi, and of course this is with a rising rate fuel regulator. I also run twin fuel filters, aeromotive pieces. As for running a BIG single inline Aeromotive (or mallory, paxton, etc.) you usually sump the tank. Using your stock fuel pump, to feed a rather thirsty and consuming 1000+hp supporting fuel pump will just end up causing restrictions. The only way I have done it previously is to have a fuel surge tank, and even then it doesn't always have ample fuel to feed the large pump (if you want to retain your stock pump). So, the safe route, and the route I usually go is fuel cell, or sumping the stock tank (unless its plastic). Hope this helped.

 

Sorry - I should have made it clear why I am asking about this level of fuel delivery system. The car will be something like 900bhp running on MoTeC, twin fuel rails per bank, twin injectors per cyl, individual TB's etc etc. The shell has been completely stripped, dipped, full RSR welded in cage, carbon roof, wide carbon body etc etc. I did try and attach a picture of the current state of the car - don't think it worked. Anywhere else I can upload to?

 

Contact Geoffrey on Rennlist.

He is a Motec and aircooled turbo guru.

With, credit card in hand.

MK

 

Here are some pics of Porscha's project. I am posting these pics on his behalf.