Fuel strategy for endurance racing

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Mar 8, 2012 | 06:42 PM

#41

emilio700

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Quote:

Originally Posted by bellwilliam

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...

+1

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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Mar 8, 2012 | 10:52 PM

#42

Bagel

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Dang, This discussion is still going on....Good to know that no one else knows our secret

-1

Mar 9, 2012 | 12:15 AM

#43

bellwilliam

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Quote:

Originally Posted by Bagel

Dang, This discussion is still going on....Good to know that no one else knows our secret

Let me take a guess. Run a bigger fuel cell ? Chump allow stock capacity +2 gallons (more depending on tank size, but for Miata it is 2).

Mar 9, 2012 | 12:17 AM

#44

Bagel

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Quote:

Originally Posted by bellwilliam

Let me take a guess. Run a bigger fuel cell ? Chump allow stock capacity +2 gallons (more depending on tank size, but for Miata it is 2).

Nope, we run a completely stock fuel tank...for that matter, a completely stock car.

Mar 9, 2012 | 01:21 PM

#45

IcantDo55

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Enlighten us oh wise one.

Mar 9, 2012 | 01:30 PM

#46

blaen99

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1. Hide aftermarket ECU (I.e. megasquirt) in stock ECU box.
2. Lean out
3. ???
4. Profit

Mar 9, 2012 | 03:59 PM

#47

Stein

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Just put one of those magnet pill things around the fuel line. Supposed to increase mileage by up to 30%. That should do it.

Mar 9, 2012 | 04:14 PM

#48

rharris19

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Quote:

Originally Posted by bellwilliam

That is what I was looking for.

Quote:

Originally Posted by Stein

Just put one of those magnet pill things around the fuel line. Supposed to increase mileage by up to 30%. That should do it.

Combine that with a Tornado and I am golden.

Mar 9, 2012 | 10:24 PM

#49

Bagel

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Quote:

Originally Posted by IcantDo55

Enlighten us oh wise one.

Well I would, but mr.harris is one of our competitors.

Mar 9, 2012 | 11:29 PM

#50

triple88a

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Quote:

Originally Posted by rharris19

That's too lean for my liking in an endurance car. If I could find a way to stay around 12.5 on the oem ecu I would be golden.

You dont have to use that big of a crystal...
The other way to do it is to get the ecu reflashed.

Quote:

Originally Posted by IcantDo55

Enlighten us oh wise one.

and and and and

LIKE A BAUSSS

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Mar 10, 2012 | 01:16 PM

#51

guzerone

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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.

Mar 11, 2012 | 04:01 PM

#52

hustler

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Quote:

Originally Posted by Bagel

I have some secrets that I just cant tell you

Tell him your secrets or you will be banned. Severely.

Mar 11, 2012 | 09:55 PM

#53

Bagel

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Quote:

Originally Posted by hustler

Tell him your secrets or you will be banned. Severely.

Let the banning commence!

Mar 12, 2012 | 12:44 AM

#54

miata_racer

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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.

Quote:

Originally Posted by emilio700

+1

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.