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Author Topic:   Fuel cell questions?
Dirt Roller

Total posts: 10
posted December 20, 2005 04:11 PM  
I've currently got a wedge shaped 32 gallon cell w/o and baffling or foam. I don't run any long races to need the capacity and don't particularly like the large amount of fuel needed to fill this cell. I'm thinking of installing a new cell and had a few questions.

1. Is there any advantage to the larger cells rather than say a 20 gallon cell?

2. Does the shape matter? Wedge vs teardrop vs rectangle?

3. Coming from roadracing, I'm aware of the advantages of running foam in the cell but have been told that the alcohol we run tends to eat up the foam over time. Does anyone make a foam that is resistant to the alcohol?

Thanks in advance for any help. Darren.

Dirt Freak

Total posts: 243
posted December 21, 2005 02:53 AM  
an advantage to the larger cell, is that it allows you to increase rear weight % quickly & easily.
a definite disadvantage is the fuel "slosh" when running very little fuel.
the latest late model tanks are tall, and roll up and over the top of the rear end. this keeps the weight higher in the car and minimises the rear swing effect of having a cell placed out behind the rear end like most of us run.
the baffle idea is good one, i've often wondered about the same thing.

Dirt Forum Champ
Total posts: 778
posted December 21, 2005 07:47 AM  
One advantage to a teardrop/wedge shape vs. a rectangular cell is you have less fuel cell exposed at the back of the car. I feel its less likely to get crunched in a crash if you run the teardrop/wedge shaped cell.

As far as weight placement goes, you'll have a little more weight where it needs to be with the teardrop/wedge shape.

I've always ordered my fuel cell foam from Speedwaymotors and never had a problem with it. I drain my tank during the winter. It does soften over time and I replace it every two years.

That big capacity cell is nice when you need to add rear percent in a hurry.

Dirt Forum Champ
Total posts: 536
posted December 21, 2005 07:49 AM  
Rocket36 pretty much covered it.

Reguarding baffles, I have seen people use sections of 4" perferated PVC pipe inside the cell for baffling.

Personally, even though I usually only run ~15 gal of fuel, I like the larger cell for the ease of fine tuning rear percentage at the track.

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