12 replies to this topic

[Chris Windsor]

Can anyone help?
Can you run with the stock fuel tank in FP in a Miata for it's location?

[Glenn]

Can anyone help?
Can you run with the stock fuel tank in FP in a Miata for it's location?

A buddy of mine runs EP in a Z-3 with a stock tank! also worked on an FP Miata in Fla last week with a cell, so.............time to consult the rule book.

[Ken Nesbit]

Yes, you can now use the stock fuel tank, here's the wording from the PCS:

The use of a fuel cell is required unless the stock fuel tank
is located between the axle centerlines and within the main
chassis structure (e.g. frame rails). When the stock fuel tank
is retained, it must be installed in its stock location, additional
retention straps and other protection can be mandated on a
car-by-car basis. Fuel cell mounting, location and fuel cell or
stock fuel tank filler cap and vents, must meet the specifications
of the GCR section 9.3 Fuel Cell Specifications.

[Scottie]

Chris, are you saying that when I come to pick my car up, it will be missing a windshield???

[Jim Daniels - FIG]

Can anyone help?
Can you run with the stock fuel tank in FP in a Miata for it's location?

Chris,

FYI: VERY hard to get a dry ice container in a stock cell.

Rick Harris, send this guy a PM.

[Sampson Racing Radios]

Yes, you can now use the stock fuel tank, here's the wording from the PCS:

The use of a fuel cell is required unless the stock fuel tank
is located between the axle centerlines and within the main
chassis structure (e.g. frame rails). When the stock fuel tank
is retained, it must be installed in its stock location, additional
retention straps and other protection can be mandated on a
car-by-car basis. Fuel cell mounting, location and fuel cell or
stock fuel tank filler cap and vents, must meet the specifications
of the GCR section 9.3 Fuel Cell Specifications.

Thats so cool... Man that saves a ton of money!

[Chris Windsor]

Thanks Ken,
that's the way I read it just wanted to confirm

[Ken Nesbit]

No problem Chris, of course the advantage to putting a cell in the passenger seat area is you'll move a bunch of weight down low and offset the weight of the driver .... of course my narrow azz still had to put 100 lbs in the trunk to make weight..

[Brian Linn]

No problem Chris, of course the advantage to putting a cell in the passenger seat area is you'll move a bunch of weight down low and offset the weight of the driver .... of course my narrow azz still had to put 100 lbs in the trunk to make weight..

Question for you Ken...
Why wouldn't you put the 100lbs "down low and offset the weight of the driver" in the passenger floor instead of the trunk? Even putting some on the driver's side floor seems better than high up - and rear of the rear axles. Just curious...

[Ken Nesbit]

Question for you Ken...
Why wouldn't you put the 100lbs "down low and offset the weight of the driver" in the passenger floor instead of the trunk? Even putting some on the driver's side floor seems better than high up - and rear of the rear axles. Just curious...

I went with the corner weights on where to put the lead, wasn't sure what it was going to come out as when I was building the car, so I put the cell in the passenger side with no idea where it was going to end up weight-wise. As it turned out, I only have 2 lbs different front to rear and about 3 lbs corner to corner. But what you're saying makes sense.

[Rick Harris_16]

Ken,

Just curious. When you were cornerweighting for lead placement, did you have shocks on your car or something solid between the shock mounts? That makes a huge difference. Most builders would take the shockes off the car and put something solid.

[Rick Harris_16]

As for the stock mounting. Sure, the stock tank is adequate and in a very safe location. It really all depends on your program and what you want to get out of the build. An all out build to run up front at the Runoffs will probably require paying attention to those little details like relocating the fuel cell to the passenger floor board.

[Ken Nesbit]

Hey Rick,
Nothing solid, just planted my butt in the seat and on the scales, never heard of anyone putting something solid in place of the shocks, what's the thinking behind that?