Custom Fuel Cell - F-Body Road Racing and Autocross Forums

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?

ReEntryRacer View Member Profile	Oct 18 2015, 03:32 AM Post #1
ReEntryRacer Group: Advanced Members Posts: 618 Joined: 8-December 04 From: British Columbia, Canada Member No.: 569	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?

dailydriver View Member Profile	Oct 19 2015, 12:28 AM Post #2
Experienced Member Group: Advanced Members Posts: 1,528 Joined: 13-January 07 From: Solebury, Pa. Member No.: 1,589	Just curious; are the front clip and/or the rear section tube framed?

ReEntryRacer View Member Profile	Oct 19 2015, 04:54 PM Post #3
ReEntryRacer Group: Advanced Members Posts: 618 Joined: 8-December 04 From: British Columbia, Canada Member No.: 569	QUOTE (dailydriver @ Oct 18 2015, 05:28 PM) Just curious; are the front clip and/or the rear section tube framed? I'll let you know when I see the car without the panels. After some discussion, the owner may be changing his mind!