PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

speed density

Old Aug 27, 2006 | 09:09 PM
  #1  
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Default speed density

i have tried to search but no luck
im trying to make a speed density tune and need some help on exactly what to change. all i do is bracket race and i dont mind tuning for seasons if anyone can please help
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Old Aug 27, 2006 | 11:19 PM
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I'm assuming you have a wide-band for the WOT tuning...

And as far as SD, it's as easy as unplugging your MAF or setting your MAF fail freq to 0. All other tuning remains the same
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Old Aug 28, 2006 | 04:34 AM
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The stickies should have everything your are looking for. Also the link in my sig is a step by step with EFILive
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Old Aug 28, 2006 | 03:17 PM
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Red01Chevy,

I think I know what you are asking... The basic tunning for a bracket car is not going to be much different from any other performance tunning. I haven't had much experience with EFiLive but If you follow the instructions from the link in TAQuickness's sig it should get you up and racing. You will need to log several passes with the various stage/launch RPMs & procedures that you might employ in bracket racing, Dump & peddle at various downtrack distances and break & peddle the stripe. The thing to remember when you start finessing your tune is that in brackets you need to tune for consistancy not necessarily best ET. Once you get your basic tune down you will want to optimize your tune for best throttle responce and recovery. As far a seasonal tunes, a good weather station and record keeping is a must...run prediction software is also very helpfull. I always had two basic tunes for my (gasoline) bracket cars. Not different tunes for seasonal changes but a day tune and a night tune..seasonal changes were based on run predictions for various temp/weather/track conditions of either a day or night tune.
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Old Aug 28, 2006 | 07:44 PM
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ive found a writeup but my i cant find maf fail freq anywhere on my hp tuners
i have the first version i think
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Old Aug 28, 2006 | 07:51 PM
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its in the engine diagnostics tab/menu if i remember right.
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Old Aug 28, 2006 | 07:56 PM
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thaks for the help ive ordered my wideband fri hopefully it will come in so i can get ready for the bracket finals in dallas
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