Tuner Help *Diablo Tuner*

2001GT281

New Member

Aug 9, 2007

18

0

1

Dec 17, 2009

#1

• Dec 17, 2009

• #1

Does anyone know why my diablo tuner will not correct my Speedo. I have a 2001 GT and I have 3.90 gears and I set it correct and install but the speedo is still off 10 MPH. I followed the instructions for installing the tune but still no good. any advise??? Also I need to retard the time a few degrees but not sure how much or what to set it at. I'm running a MMR 850 mod with 10.5 to 1 comp. Thanks

 

tag4car

Member

Nov 21, 2005

0

0

16

Birmingham AL

Dec 18, 2009

#2

• Dec 18, 2009

• #2

do you have the tire revs per mile set correct?

 

MaxedGT

Member

Mar 31, 2005

304

0

17

Surrey BC Canada

Dec 18, 2009

#3

• Dec 18, 2009

• #3

If you're loading the factory horsepower tune, (87 octane) you can't modify it, unless you've got the latest revision.
But it you update your predator, you won't be able to dissable the rear o2 sensors.

 

2001GT281

New Member

Aug 9, 2007

18

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1

Dec 20, 2009

#4

• Dec 20, 2009

• #4

tag4car said:

do you have the tire revs per mile set correct?

Click to expand...

I do have the option to set it...But I have no clue to set it at.
I have 245X45X17 tires if that helps...

So per Tire Calculator it should be set to 785 so I'll try setting that tomorrow and see what happens.

 

gmantheman

Member

Dec 30, 2007

483

1

16

Escondido, CA

Dec 20, 2009

#5

• Dec 20, 2009

• #5

2001GT281 said:

I do have the option to set it...But I have no clue to set it at.
I have 245X45X17 tires if that helps...

So per Tire Calculator it should be set to 785 so I'll try setting that tomorrow and see what happens.

Click to expand...

At 785 you will still be off. I had 245/45/17 on my car and when I compared the cars speedo with the GPS, I was off. I called diablo and they told me to set it at 823. Low and behold it worked.

 

2001GT281

New Member

Aug 9, 2007

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1

Dec 20, 2009

#6

• Dec 20, 2009

• #6

gmantheman said:

At 785 you will still be off. I had 245/45/17 on my car and when I compared the cars speedo with the GPS, I was off. I called diablo and they told me to set it at 823. Low and behold it worked.

Click to expand...

I just want to be sure your sig says your running 4.10's im running 3.90's so would the 823 still be right?

 

gmantheman

Member

Dec 30, 2007

483

1

16

Escondido, CA

Dec 20, 2009

#7

• Dec 20, 2009

• #7

Your gearing shouldn't affect your tire revs per mile as these are set separately. Tire height is what affects tire revs.

 

2001GT281

New Member

Aug 9, 2007

18

0

1

Dec 20, 2009

#8

• Dec 20, 2009

• #8

gmantheman said:

Your gearing shouldn't affect your tire revs per mile as these are set separately. Tire height is what affects tire revs.

Click to expand...

Good point lol. Now does anyone know what I should set the Spark Advance to if I want to retard it 3 degrees? I'm running Higher Comp then stock so I was told I should drop it back a few.

 

twogts4us

15 Year Member

Apr 1, 2004

4,188

12

79

Dunedin, FL

Dec 21, 2009

#9

• Dec 21, 2009

• #9

Diablo's ability to alter your timing is minimal. It's not in degrees, it's in percentage.

 

MaxedGT

Member

Mar 31, 2005

304

0

17

Surrey BC Canada

Dec 22, 2009

#10

• Dec 22, 2009

• #10

My previous post was ignored. Go here.
View topic - 02 Mustang GT (A/T)- Axle ratio not applying :: DiabloSport :: Gas and Diesel Tuning Systems
This links to diablosport's support.

 

2001GT281

New Member

Aug 9, 2007

18

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1

Jun 7, 2010

#11

• Jun 7, 2010

• #11

Not ignored just stupidly misunderstood on my part. I finally loaded the Diablo tune with the correct adjustments and I retarded the timing 15%. Everything is running good at this point and the speedo is correct. Thank you very much for your help everyone *better late then never*