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Old August 17th, 2009, 11:14 PM   #1
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What to look for when getting tuned?

I don't know too much about tuning...just that the perfect AFR is the goal. So what is the "perfect" AFR? Is the more linear it is the better? What's the ideal shape for the torque and hp curves? I've seen some people here look at a dyno graph and say "whoa, that's not right"...so I'd like to know what they're looking at/for.

I'll be having my car tuned on a Mustang Dynamometer, and I know that has an effect on final numbers as well, but what should I be expecting for a supercharged J30A1, stock headers, 2.5" exhaust, CL-S HBP?

The last time I dyno'd was when I got my car tuned for the first time. I'm using e-manage blue and at the time I had stock everything, just the SC and e-manage installed. I dyno'd at a pathetic 213whp/207wtq =/.

Helpz?


Thanks,
Jeff
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Old August 18th, 2009, 02:13 AM   #2
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Your A/F should look like this (ideally):

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Old August 18th, 2009, 09:25 AM   #3
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Cool. Any particular "shape" I'm looking for on the HP/TQ curves?
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Old August 18th, 2009, 09:31 AM   #4
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in boost u should be at 11.6 -11.8 afr normal driving is like 12.8 - 13.2 i believe but it might all be different from sc to turbo
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Old August 18th, 2009, 09:44 AM   #5
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Yea...mine's ALL outta whack then. When my boost gauge shows less than 0, my AFR is usually up in the 14s and 15s. When I'm at 0-1psi my AFR drops to low 11s and high 10s. Any more than 1psi boost and I'm sitting at high 11s and low 12s.

The last tuner I had was apparently on something...

Steve, are you using the Comptech FPR?
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Old August 18th, 2009, 12:59 PM   #6
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Yes, because for our stock injectors, its better to use the rising rate CT FPR.
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Old August 18th, 2009, 01:10 PM   #7
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^^ to make sure we have enough fuel and don't lean out too much on the top end, right?
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Old August 18th, 2009, 01:19 PM   #8
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boost needs to be 11.5-12.1 and normal driving needs to be 14.7 no matter S/C or Turbo. With the auto tranny you should have a flat line of torque no matter what the TQ number is. HP is all up to what you have done on the ride.

with your similar set up i ran 247 HP and 231 TQ. Hope this helps
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Old August 18th, 2009, 01:21 PM   #9
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one other thing. the HP line should just continue up until redline. if you see a drop anywhere thru the line then there is an issue.
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Old August 19th, 2009, 08:17 AM   #10
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^^ thanks for the info! I'll keep all that in mind.
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