R32 Gtr Aftermarket Fuel System Setup Problem. Is My System Too Big? Any Suggestions?

[shaund]

There is plenty of room under the car at the rear to hide a small cooler on the return fuel line... some where forward of the rear diff would be a good spot.

If you put your cooler on your return line, there is no high pressure, but potentially a high flow rate. As mentioned there is a risk of fuel leaking if the cooler gets damaged in an accident (ie, mount the kerb, run over a rock/lump of wood) etc, but if you put it as high as you reasonably can and drive sensibly there is minimal risk.

If you wanted to go ultra minimalistic, you could use a cooler in the style that the 32 GTR has for power steering that sits infront of the aircon condenser. This is just a length of pipe with some fins attached. I'm sure there would be a 'safe' place to hide this at the rear of the car.

-Shaun

[Cjmartz2k]

Is there any specific type of cooler that can or can't be used? I mean, is there anything out there that wouldn't react well to gasoline? I can find all kinds of power steering, automatic transmission, or oil coolers in next to new condition in the junk yards around here.

[Travis Trayhern]

http://cgi.ebay.com/ebaymotors/Flex-a-lite...sQ5fAccessories

[SirRacer]

you are crazy mate get ya self a proper line cooler that isnt placed at the front of ya car, get it sorted b4 you kill ya self or someone else this is some stupid shit dude really, seriously what do u think will happin if you crash? 50+psi of fuel squrting ova everything all the wiring and shit? it might nt be much fuel but once it ignited god help you. book ya self into a cat scan or something gee

You must be one of those internet mechanics who dont know how to hold a spanner but are keen to offer an opinion! If you actually look at how much fuel is sitting in the cooler and the pressure flow through it you would know that its very minimal. Your 50psi figure must have come from the internet mechanics handbook.

My cooler with its minimal fuel flow is mounted on the top of the radiator support panel. I could mount it under the car or around the diff, however then im likely to smash it on speed bumps and crack it that way.

This was a test to see whether it was the problem. When i get time im going to scour junk yards to find something a little smaller (this things massive) and see whether this is up to the task of cooling the fuel. When i do that im going to consider mounting it in a cut out panel in the boot, but at the moment its very low priority as the car is used as a drag car predominantly and sees very little road use.

Edited January 5, 2009 by SirRacer

[shaund]

You must be one of those internet mechanics who dont know how to hold a spanner but are keen to offer an opinion!

LOL

If theres one thing to look out for, its those damned internet mechanics

Is there any specific type of cooler that can or can't be used? I mean, is there anything out there that wouldn't react well to gasoline?

Any small cooler should be fine.. I've yet to see one made of anything other than copper or alluminium, both of which are fine with normal fuel. If you get a second hand cooler and its had something other than fuel thru it, i'd clean it out with some clean new fuel. Just make sure the pipe diameter is large enough to flow the return fuel without adding any restriction... ie, the pipe diameter should be equal to your return lines/hose.

The cooler Travis Trayhern pointed out from ebay looks good, but im sure you'll be able to get something cheaper at a wrecker. just make sure you test it for leaks before you use it.

[nimbl3]

Hey Guys,

was doing a search and came across this thread. I to was looking for an aftermarket cooling system for my fuel set up. Was going to go w/ the conventional fuel cooling like what you guys are linking but came across this beauty at SEMA show in Las Vegas. Company called S-Max intercoolers made this piece and its actually what you may need.

Its a surge tank with a cooling mechanism. owner of the car is Dave, he works w/ Smax and he explained to me its mechanics. I know there are alot of things going on in that trunk (believe me it was gorgeous in person) but if u notice 2 -4 an lines on the side of the surge tank (one on top and the other on bottom) those are actually inlets an outlets for Co2 (thats wat they use) or any cooling agent you want to use to help cool the fuel in the surge tank.

seems like i can post some more good information on this... I'll give Dave a call tomorrow to see what other information I can give... for the mean time... take a look at this beauty! (cooler on the right is for the diff)

[rob82]

You dont need fuel coolers - all you need is a properly setup fuel system. We never run two fuel pumps especially 044 pumps at the same time - that means you'll be sending at least 6L/min of fuel flow to the front of the car all the time. Your better off putting a walbro intake pump or whatever intank pump you prefer and run an addtional high load swithched 044 pump inline with a bypass line around it - dont forget a check valve. I've seen this setup run over 420rwkw on an xr6T using E85 with fuel line pressure of about 78Psi. Remember you need about %28 more fuel flow with E85!!

[Soundboyracer]

Personally the return from the fuel rail should be run back into the tank never the surge. This usually causes boiling of the fuel and straining of the pumps.

i usually run two returns, one from the fuel rail to the tank and another from the surge back to the tank.

a stock fuel pump is sufficient for your purposes as a lift pump, i dont see a fuel cooler making sense, work with the flow.

[KiwiRS4T]

You will find in the 7 years since the last post there has been lots of discussion on fuel coolers and ways of regulating the current to the pump(s) according to load.