Fuel strategy for endurance racing

Reply Subscribe

Thread Tools

Search this Thread

03-08-2012, 06:42 PM

#41

emilio700

Supporting Vendor

iTrader: (3)

Join Date: May 2005

Posts: 7,327

Total Cats: 2,379

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.

__________________

www.facebook.com/SuperMiata

949RACING.COM Home of the 6UL wheel
.31 SNR

03-08-2012, 10:52 PM

#42

Bagel

Newb

Join Date: Feb 2012

Location: Houston

Posts: 40

Total Cats: -8

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

03-09-2012, 12:15 AM

#43

bellwilliam

Junior Member

iTrader: (1)

Join Date: Aug 2007

Posts: 384

Total Cats: 12

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).

03-09-2012, 12:17 AM

#44

Bagel

Newb

Join Date: Feb 2012

Location: Houston

Posts: 40

Total Cats: -8

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.

03-09-2012, 01:21 PM

#45

IcantDo55

Elite Member

iTrader: (11)

Join Date: Apr 2007

Location: VA Beach

Posts: 1,996

Total Cats: 51

Enlighten us oh wise one.

03-09-2012, 01:30 PM

#46

blaen99

Elite Member

iTrader: (6)

Join Date: Sep 2010

Location: Seattle, WA

Posts: 3,611

Total Cats: 25

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

03-09-2012, 03:59 PM

#47

Stein

Elite Member

iTrader: (46)

Join Date: Dec 2007

Location: Nebraska

Posts: 4,729

Total Cats: 166

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

03-09-2012, 04:14 PM

#48

rharris19

Elite Member

Thread Starter

iTrader: (41)

Join Date: Jan 2006

Location: Seabrook, TX

Posts: 2,417

Total Cats: 20

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.

03-09-2012, 10:24 PM

#49

Bagel

Newb

Join Date: Feb 2012

Location: Houston

Posts: 40

Total Cats: -8

Quote:

Originally Posted by IcantDo55

Enlighten us oh wise one.

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

03-09-2012, 11:29 PM

#50

triple88a

Elite Member

iTrader: (2)

Join Date: Apr 2006

Location: Chicago, IL

Posts: 10,454

Total Cats: 1,799

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

Attached Thumbnails

Fuel strategy for endurance racing-41ijddey2ml._ss500_.jpg

Fuel strategy for endurance racing-163_0708_performance_23z-jet-power_flo_throttle_body_spacer.jpg

03-10-2012, 01:16 PM

#51

guzerone

Junior Member

iTrader: (1)

Join Date: Jul 2010

Location: Seattle Area

Posts: 74

Total Cats: 0

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.

03-11-2012, 04:01 PM

#52

hustler

Tour de Franzia

iTrader: (6)

Join Date: Jun 2006

Location: Republic of Dallas

Posts: 29,085

Total Cats: 375

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.

03-11-2012, 09:55 PM

#53

Bagel

Newb

Join Date: Feb 2012

Location: Houston

Posts: 40

Total Cats: -8

Quote:

Originally Posted by hustler

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

Let the banning commence!

03-12-2012, 12:44 AM

#54

miata_racer

Junior Member

Join Date: Sep 2008

Location: Houston, TX

Posts: 102

Total Cats: 0

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.