mustang spa

[tomgray]

hi there I have a 1965 mustang 289 fia car, I have never raced at spa before can someone tell me on average how much fuel per lap dose a mustang use

tom

[terence]

From memory quite a while ago,I think its around 5 perlap.My memory might be wrong though,like I said,it was a while ago.

[Adam43]

Welcome to the forum Tom.

it is difficult to give a definite answer to your question even if you have a FIA Mustang set up like yours. You'll get less than 10mpg and Spa is 4.4 miles long. A good starting point is looking at what you get elsewhere. What mileage do you get at other circuits? Does it change much by circuit. Spa will be relatively high for fuel consumption, but I found my consumption didn't change that much circuit to circuit.

What do you normally get?

[Al Weyman]

I would figure on about 1.25 litres a minute.

[FISCracer]

The German guy next to me in NKHTGT at The Summer Classic with a 289 notchback was fuelling 5L per lap. IIRC he was running 3.08s

HTH

[JonWolfe]

One litre a minute for a typical 289.

[Adam43]

It's getting more frugal by the post!

[delta]

Our Galaxie,s are around a litre a minuit so I recon as someone said 1.25 litre a minuit wont be far off.

[Moosehead]

Yep, 1 litre a minute

[terence]

So,around 5ltrs per lap then?

[Al Weyman]

I used to think my Camaros did a litre a minute but it used more than that at Mallory the other week although I wasnt in top much thats why I revised it to 1.25 a minute as I started running out of fuel and fortunately had 3 litres in the reserve tank so managed to limp home. They do have full house 5.7's breathing through a 750 Holley in them though so a 289 to FIA spec probably running a 650 CFM or lower carb should be more frugal. I also have a 3.75 final drive. Yeah I would say 1 litre a minute is realistic with a bit more to be safe. BTW Clff Ryan gets a litre a minute at Spa in his XJS 5.3 Litre V12.

[Cliff Ryan]

And a litre a minute in my Mustang, same as Jon & Moose, which by my reckoning makes about 3 litres a lap

[Moosehead]

Originally Posted by Cliff Ryan

And a litre a minute in my Mustang, same as Jon & Moose, which by my reckoning makes about 3 litres a lap

Not 2.75?

[Cliff Ryan]

Originally Posted by Moosehead

Not 2.75?

[tomgray]

Thanks for all the help, tom

[Al Weyman]

In jest but surely that's a valid point, if Moose is doing a 2.75 lap and Cliff a 3 minute lap how can they both do a litre a minute?

[Tim Falce]

Originally Posted by Al Weyman

In jest but surely that's a valid point, if Moose is doing a 2.75 lap and Cliff a 3 minute lap how can they both do a litre a minute?

[Clive Brown]

Surely, the faster you go, the better the chance you have of getting back to the pits before you run out of petrol?

[Moosehead]

Originally Posted by Al Weyman

In jest but surely that's a valid point, if Moose is doing a 2.75 lap and Cliff a 3 minute lap how can they both do a litre a minute?

I go so fast that I turn the engine off on the downhills just to give others a chance

[Cliff Ryan]

Originally Posted by Moosehead

I go so fast that I turn the engine off on the downhills just to give others a chance

And still manage 2:45

[FastDB2s]

Originally Posted by Al Weyman

I used to think my Camaros did a litre a minute but it used more than that at Mallory the other week although I wasnt in top much thats why I revised it to 1.25 a minute as I started running out of fuel and fortunately had 3 litres in the reserve tank so managed to limp home. They do have full house 5.7's breathing through a 750 Holley in them though so a 289 to FIA spec probably running a 650 CFM or lower carb should be more frugal. I also have a 3.75 final drive. Yeah I would say 1 litre a minute is realistic with a bit more to be safe. BTW Clff Ryan gets a litre a minute at Spa in his XJS 5.3 Litre V12.

We get 1ltr a minute out of Andrew Sharp's DB2 at Mallory, we get .8ltr a minute at Le Mans.
It depends on how many times per minute that the throttle is pumped, at WOT for long periods an engine normally uses less fuel.
We have just started running AS's DBS V8 and was using 1.25 ltrs or slightly more per minute at Silverstone National at the BDC which we underestimated & it ran out of fuel in the 1st race - duh!