Fuel strategy for endurance racing
#41
next time. during one of the track day. drive the car till fuel light comes on (if you have a NB), start your count. next drive till car hiccups...write down how many laps that was. then drive till the car stutters so bad that you are losing 5+ seconds. write that down.
my point is, ignore the fuel level gauge...it really is irrelevant...
my point is, ignore the fuel level gauge...it really is irrelevant...
What matters is how far you can go at race speed. Find out. Record it carefully. Keep track of distance traveled on track during race. OEM dash gauge is useless.
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#48
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next time. during one of the track day. drive the car till fuel light comes on (if you have a NB), start your count. next drive till car hiccups...write down how many laps that was. then drive till the car stutters so bad that you are losing 5+ seconds. write that down.
my point is, ignore the fuel level gauge...it really is irrelevant...
my point is, ignore the fuel level gauge...it really is irrelevant...
Combine that with a Tornado and I am golden.
#51
We run a 95 325i in Chump.
With the stock diff (3.46 gears), we can go 2 hours. We changed the rear end to a 3.73 from the junkyard and the car started sputtering through turn 4+5 in Portland after 1:20h.
While it was the perfect ration for that track (just hit redline at the end of the straight), not being able to run the full 2 h cost us.
So slightly lower gearing might get you through 2h.
With the stock diff (3.46 gears), we can go 2 hours. We changed the rear end to a 3.73 from the junkyard and the car started sputtering through turn 4+5 in Portland after 1:20h.
While it was the perfect ration for that track (just hit redline at the end of the straight), not being able to run the full 2 h cost us.
So slightly lower gearing might get you through 2h.
#54
We calculated it the easy and safe way....fill the tank to the brim....run like hell for 20 min straight...flat out 7000rpm shifts...etc....
fill with fuel...
do maths
assume the shitty miata will only run down to 10-11 gallons...
The run it till it hicups hard has run us out of fuel on track before...which sucks in the summer.
fill with fuel...
do maths
assume the shitty miata will only run down to 10-11 gallons...
The run it till it hicups hard has run us out of fuel on track before...which sucks in the summer.
#57
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We calculated it the easy and safe way....fill the tank to the brim....run like hell for 20 min straight...flat out 7000rpm shifts...etc....
fill with fuel...
do maths
assume the shitty miata will only run down to 10-11 gallons...
The run it till it hicups hard has run us out of fuel on track before...which sucks in the summer.
fill with fuel...
do maths
assume the shitty miata will only run down to 10-11 gallons...
The run it till it hicups hard has run us out of fuel on track before...which sucks in the summer.
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