FE-FC Holden Discussion Forum

hi have a standard tank in fc sedan with a v6 engine what type of tank can i install without going into the wheel well and i think drop tanks arnt allowed in qld thanks john

I would keep the original John as the old saying goes if it aint fu**ed don't fix it.

I have a larger  alloy tank in my Ute that hangs down the same as standard  but goes up where the spare originally went it's crappy carrying the spare in the back but when I had my blown engine in,, with out it I would have had to fuel up every couple of days .......FC427.....

You need to modify the tank for the injected engine so you may as well change it for another one more suitable as others here on the forum have done.  If you are running a V6 engine I'm guessing that the wheels you are running wont fit in the wheel well anyway as a spare. I would also assume you would not be running early Holden stud pattern, so keeping a stock wheel in the boot would be a waste of time.

Ken

John,
There seems to be two common tanks to put in the Fc sedan. One is the VN tank the other is the VQ statesman tank. The VN tank is about 60 litres, the VQ is about 90 litres from memory.

thank you for all your help something i will have to think about,the tank in it has been modified am running 6x14 hktg wheels,so i will do some home work with those 2 tanks thanks again john

If I can tag a question onto this topic.
Is there any real reason why the original fuel tank can't stay.?
I would assume that the new fuel pump pick up would have to be grafted on and maybe a little swirl pot added inside to be ideal. is that it?

Problem with the old tank basically is the size... I have a 75 litre tank in the van and get around 550 - 600km's per load around town from 60 litres that I use from it. so would be around 320 - 350 km's around town.

For the ute that I am doing I have put in a VN commodore tank but extended it to stay under the floor height and get around 115 litres.

Cheers
Jason.

yer as fevanv6 said the only reason was the size,if i drive to nats i dont want to keep filling up a lot,and   i think it has a small leak fuel smell thru car,  it looks like coming from the top it is a bit moist,so i will see which way i will go either fix and put up with filling up or go bigger see what the treasurer will say 

John,

I am going to take my tank to a welding shop on the weekend so will take some before and after shots for you. I have cut out the retainer ring from the plastic VT commodore tank and had an insert made for the seal. So now all that is to be done is the tank welded up again.
When I went to the Nationals in Jindabyne I was getting around 800km's out of 60-65litres from my 75litre tank.  ;D ;D

Hope this helps you a little.

There are photos of an installation into a sedan here as well.
Have a look at smithy's car... this may help you.

http://fefcholden.org.au/forum/index.php/topic,13185.msg79029.html#msg79029

Cheers
Jason.

Apart from the size issue, most EFI setups have a fuel pump mounted in the tank so that positive pressure is maintained throughout the fuel line at all times. I suppose it would be possible to fit one in there, but this again would reduce the capacity of the tank. The other is the return lines need to be run back to the tank as well as the line for the carbon cannister. Again no major issue, but when you add up the small capacity, fit a submerged fuel pump, plumb in the return lines etc, it is quite often far more beneficial to fit a larger capacity tank, that has the all the things previously described, than to play around with the old tank.

The way I see it, if you are going to modify the car, and then drive it to enjoy it, why would you potentially build in a problem ie a short range fuel tank.

Keith

a big thank you to all for you help i will be going with the bigger tank.  john

Why? Is this as apposed to vs or vt,r,x,e...

The VT onwards are the polyurethane tanks so no good for the swap.

I think the sizes differ slightly with each model.

Jason.

thanks for all your help i have almost certain to go with a drop tank as i can then have the flat floor as i will have to mod the wheel well to put my 14s in the standard spot