[ReEntryRacer]

I've been asked to complete the build of a friend's 1990 'vette. It has now been caged by a local expert and it has serious performance with a Dart-blocked SBC with 540 HP. Did I mention it is about 2 feet shorter than a stock-bodied C4? It's body has been crafted by a CF expert to remain true to the original shape, but it is now MX5-sized! The owner can fit nicely inside the car, but my bulky 6' will not. And it currently has a small fuel tank of about 6 gallons. He had used it as an AX-only car until now. Somehow I will have to find space for as much fuel as possible, and still get it certified by SCCA.

It will need at least 30 minutes at an average race fuel consumption estimated with BSFC of .6 LB/BHP*HR. although real world numbers may be quite different.

So, here are my initial jots on a napkin... .6 BSFC X 540 BHP = 324 LB / 2 = 162 LB / 6 LB/Gal = 27 Gallons!

I will receive the car in a few days and then the tape measure gets warmed up...

Does Fuel Safe or ATL make custom tanks with SFI approval? Are multiple-cell tanks legal?

[Blainefab]

Fab a can that fits in the space available, Fuel Safe or ATL can build a bladder that fits the can. A single cell is way less complicated to plumb, even if it needs multiple pickups. Since the rear crush space has probably already been eliminated, I'd look at cutting out the tubs aft of the seat bulkhead and doing a saddle shaped cell there with an internal low pressure transfer pump.

[ReEntryRacer]

Fab a can that fits in the space available, Fuel Safe or ATL can build a bladder that fits the can. A single cell is way less complicated to plumb, even if it needs multiple pickups. Since the rear crush space has probably already been eliminated, I'd look at cutting out the tubs aft of the seat bulkhead and doing a saddle shaped cell there with an internal low pressure transfer pump.

Thanks, yes the rear space is gone from what I've seen. I'll see what I can do.