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Author Topic:   MOUNTING FUEL CELL
20bmw
Dirt Full Roller

Total posts: 74
posted November 29, 2003 06:33 PM  
WHAT IS THE BEST WAY TO MOUNT THE FUEL CELL??
THE REAR FRAME WAS CUT AND BOXED WITH 2X3 TUBING. THE CELL IS 16gal. W/CAN.
IF ANYONE HAS PICTURES THAT WOULD BE A BIG HELP.

THANX, 20bmw

racer17j
Dirt Forum Champ
Total posts: 5390
posted November 29, 2003 07:28 PM  
I have heard some say that the center is the place you want it mounted, others say the left(drv) side. If you think about it, your weight percentages will change a little when you start burning fuel.

Mine is on the left and as low to the ground as possible.

66jj
Dirt Forum Champ
Total posts: 823
posted December 01, 2003 11:03 AM  
I would mount it to the right as far forward as possible, on dirt, about shoulder ht.

probably run one by one accross trunk and bolt it down to that with straps.

Jeff

Raz_900
Dirt Forum Champ
Total posts: 635
posted December 01, 2003 11:40 AM  
With the 17 gal cell, we ran 1" tube straight between the frame rails then slid the can in. There's 2 lengthwise bars (at the ends of the cell) for support. And 2 - 2" straps go under and over it.

With the 22 gal cell, we did the same basic thing but built it on about 6" risers on the frame. The 22 gal cell was 4" deeper.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted December 01, 2003 08:52 PM  
build a 1"x1" square tube frame around it the four sides, then run the 2 inch strap around it. run the 1 inch tube infront and behind the cell so that it will hook to a wiehgt clamp then use the wieght clamps to move the cell left or right for wieght.
that would be best.

odb93
Dirt Forum Champ
Total posts: 537
posted December 02, 2003 09:16 AM  
66 Explain to 20b why he should mount it to the right.....

jay116
Dirt Freak

Total posts: 428
posted December 02, 2003 10:38 AM  
ok true that burning fuel will change your chassis. but last time i checked this forum said pure stock/bomber tech talk. i have ran alot of street stocks and the little amount of fuel burned will not be noticed. in a mod on gas the chassis is effected minimally. and a mod burns alot more fuel than a street stock. i would mount the fuel cell half full with the wieght clamps, and then move it left to right ot get your %right then add a few gallons so that your fuel load at about 2/3 race will be at the half level, then the fuel load will not have much effect on the car and you will use that bulky housing of the cell for wieght.
the only cars that are effected by fuel are mods and latemodels not street stocks in a 20 lap race.

tilley88
Dirt Forum Champ
Total posts: 879
posted December 02, 2003 09:33 PM  
I agree with all of the above(lol). True, streeters don't burn off that much gas, but mods really don't burn off that much, either(gas). If the chassis is light enough then cell placement is'nt that critical. Don't mount it so low it bottoms out on a rough track. I'm with 66 on the shoulder height. It's all relative to how each individual sets their car up to suit their driving style.

tilley88
Dirt Forum Champ
Total posts: 879
posted December 02, 2003 09:35 PM  
20bmw, I'll get pics to you soon.

20bmw
Dirt Full Roller

Total posts: 74
posted December 02, 2003 09:46 PM  
Building my first car for 2004 season and have zero seat time in a stock car. (rookie)

I will have to learn the car and how to set it up, so will the cell placement make a diff ??

[This message has been edited by 20bmw (edited December 02, 2003).]

zeroracing
Dirt Forum Champ
Total posts: 1875
posted December 02, 2003 09:50 PM  
i forgot i agree put it up in the car that will help with sidebite and body roll. by putting it on clamps put the car on the scales and move it left ot right to get the % right. but put it up in the car not low.

24s52
Dirt Maniac

Total posts: 122
posted December 03, 2003 07:48 AM  
Ok guys.....here's one....what about the placement for an enduro car?? I'm running a basically stock Ford crown vic 4 door so I can run in cruisers too... the enduro is 200 laps on a 1/2 mile track. Will the handling change too much if it is offset? Should I keep it in the center and go with the "uniform burn" theory?? I'm looking at a 32 gallon cell.

odb93
Dirt Forum Champ
Total posts: 537
posted December 03, 2003 07:52 AM  
If the fuel cell is mounted higher in the car, won't that cause the car to roll over more in the corners???

If it is mounted too low, it can cause the rear of the car the push or scoot through the corners.

dirtracer7
Dirt Freak

Total posts: 337
posted December 03, 2003 11:37 AM  
I have my cell mounted to the left,but am going to the center for next year.I don't know about you guys but we have run a 20 lapper which ended up taking close to an hour to finish.It burned about 12 gallons mine seems to burn more fuel on cautions than to the floor.I'm bolting lead to the left rear to get it scaled out and when the fuel burns off it will have an equal effect on the rear hopefully

66jj
Dirt Forum Champ
Total posts: 823
posted December 03, 2003 11:44 AM  
havent looked at this for a while.

I would put it on the right because as fuel is burned of, no matter how little is burned of you will gain some left side percentage. Every little bit helps toward the end of a race.

If your fast enought to give a little advantage away, then just put a block under the pedal, and give everyone else a chance, lol.

Ill be racing a IMCA stock with a 350 carb I bet Ill only burn a 2-3 gallons all night? but thats approx. 21 lbs.

When Im building a car and know could do something that may help I just do it, I probably wouldnt cut my car up to change it though.

In a enduro it would be have a lot of effect youll go thru a lot of gas, though your car isnt really a set up race car usually.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted December 03, 2003 12:46 PM  
i find it hard to believe that you burn 12 gallons without a problem somewher else i have ran 40 lap features and ran 20 lappers that do take more than 45 min. to run. and i can barely burn 9 or so gallons in a mod.
putting it over on the right will give you more left side at the end, but many of the big car manufatures are switching to the movable ones. and 20 pounds will not make a noticable difference in a street stock.
also left side is not as important as cross and rear percent on dirt.
to answer odb93, yes mounting the cell up in the car will cause it to roll over more. that is the point it will roll over and help with side bite on dryslick tracks.

20bmw
Dirt Full Roller

Total posts: 74
posted December 03, 2003 02:52 PM  
By what you guys are telling me
would it be safe to say mount the cell up and center??

My track rules on the motor and tires are kind of open.
The only limit on the motor is a 500cfm carb. there is no cam or compression rules you can run what ever you want. Headers and alum intake are aloud for 2004 season.

Tire rule is any dot street radial up to 60 series
we can run the hoosier dot`s

nonadj. spring spacers but no weight jacks.

so with these rules will it make a big diff
on the cell location.

ps. the track is in Inaiand it is 3/8 simi banked with Ky. red clay. the track is fast.
in 2003 they ran the ump summer nationals and they hooked. Moyer set fast time at a speed of 123mph
www.kampmotorspeedway.com

zeroracing
Dirt Forum Champ
Total posts: 1875
posted December 03, 2003 03:58 PM  
mount it movable and move it to get your wieght right for about when your 2/3 threw the race. and i have ran a pretty much unlimited motor just a 2 barrel cab class with both a b mod and a street stock. and i have ran alot of motors one was a 355 fully ported and polished roller motor, out of a friends mod, and we also ran a 383 with 13 to 1 compresion, and we never burned much fuel on a 2 barrel.

neil rucker
Dirt Forum Champ
Total posts: 799
posted December 04, 2003 05:00 PM  
obd93, yes

bigcityracer
Dirt Freak

Total posts: 431
posted December 06, 2003 10:22 AM  
Everone lowers there car to lower there weight height. Why raise the tank? why not just leave the car at normal ride height? My tank low as possible and far left car is probably the fastest car on the track. There are no wrong ways, just different ways to do the same thing.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted December 06, 2003 10:41 AM  
the reason to leave it high is to make it a piece of ballast. then the car will roll over and get more sidebite on drylick tracks.

bigcityracer
Dirt Freak

Total posts: 431
posted December 06, 2003 01:54 PM  
quote:
Originally posted by zeroracing:
the reason to leave it high is to make it a piece of ballast. then the car will roll over and get more sidebite on drylick tracks.

So why do so many people lower there cars so they will handle better then raise the weight? This is not making any sence to me. My car is low my fuel cell is low and car is fast.

66jj
Dirt Forum Champ
Total posts: 823
posted December 06, 2003 02:19 PM  
what do you call low, in pavement racing my cell was allways low, 8.25 of the ground at ride ht race ready, and half inch from the back of the rearend.

here on dirt most classes require the stock trunk to be left in so mounting it on top of that would be to me considered normal, low would be cutting a hole in and lowering it??

what do you consider for a low ride ht, I dont think Ive ever seen a car on dirt here low, I consider low 4 on the lf,4.25 rf, 5.25 rr, and lr 5.

if were talking a metric measureing on the frame then you would have to add 2 to those numbers to be the same??


bigcityracer
Dirt Freak

Total posts: 431
posted December 06, 2003 04:43 PM  
I am building a Buick Regal metric. Just trying to get things right the first time. I am in no way saying your wrong, just trying to understand. I do apperiate your help.

Can we say weight in rear should be about 24" high to handle well?

Right now running a Toyota Corolla mini stock. The car sits about 4" off the ground and the fuel cell is cut threw the trunk floor. It sits about 1" in front of the rear axle and about 5 inches off the ground. I have a low trailer and the tank rubbs getting on and off. My added weight are on the floor behind drive on LH and RH sides. about 200lbs.

[This message has been edited by bigcityracer (edited December 06, 2003).]

zeroracing
Dirt Forum Champ
Total posts: 1875
posted December 06, 2003 05:41 PM  
the reason to put it high is because the car will pivot lower than were the cell is so it will make that wieght roll over and have more effect just like in the ballast placement topic that 66jj started, only it works vertically. it will create more body roll so you can leave the car low to the ground but the cell high and then it will pivot low and the cell will roll over and the rr will get side bite.

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