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Speed Density/Carb/SSP section This section is for the Speed Density or Carb vehicles, as well as Special Service Package 'Stangs

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Old 11-12-2013, 09:26 PM   #11
JPJP
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Hey 87 T TOP GT302, are you still running Speed Density?

I am Supercharged (Paxton SN89) and still running with 19 lb injectors and SD. I MAY bump up to 24 lb injectors but am happy so I figure leave it alone.
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Old 11-13-2013, 08:13 AM   #12
87 T TOP GT302
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I still am speed density. I have added an idle adjustment plate .It allows you to fine tune the idling .I purchased it from Mustang unlimited. I have been adjusting and the best I can is idle at 1100 rpms.
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1987 GT W/T Tops 5.0 With ported/93 COBRA Heads W/1.7 RR . Professional Products intake w/65mm T/B Lunati 501A1LUN cam 272/282 duration and 477 lift but 506 wit 1.7rr 1 5/8 Mac equal length shorty headers W/ 2.5 full exhaust and Flowmaster super 40's, BBK underdrive pullies ,Had 2.73,3.55,4.10 ,and current 3.73 gears with aluninum drive shaft. Hypertech Chip.Just added 24lb injectors.
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Old 11-13-2013, 03:56 PM   #13
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thanks for the info guys, how can i tell that my car is running lean?
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Old 11-19-2013, 04:00 PM   #14
87 T TOP GT302
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Every Mustang is different but with mine it seemed like it needed more fuel .It wasn't bogging but when I nailed it seemed to need more fuel. Lean may not be the best way to describe the condition. All I know is with the 24 it just runs better especially at full throttle.
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1987 GT W/T Tops 5.0 With ported/93 COBRA Heads W/1.7 RR . Professional Products intake w/65mm T/B Lunati 501A1LUN cam 272/282 duration and 477 lift but 506 wit 1.7rr 1 5/8 Mac equal length shorty headers W/ 2.5 full exhaust and Flowmaster super 40's, BBK underdrive pullies ,Had 2.73,3.55,4.10 ,and current 3.73 gears with aluninum drive shaft. Hypertech Chip.Just added 24lb injectors.
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Old 11-19-2013, 06:40 PM   #15
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Quote:
Originally Posted by 87 T TOP GT302 View Post
Every Mustang is different but with mine it seemed like it needed more fuel .It wasn't bogging but when I nailed it seemed to need more fuel. Lean may not be the best way to describe the condition. All I know is with the 24 it just runs better especially at full throttle.
Obviously your issue is more related to having a lumpy cam. SD cars are prone to idle, fuel ratio and drivability issues with aftermarket cams.

Your cam choice is not to bad , but it still lowers your vacuum quite a bit and the MAP sensor is seeing this low vacuum.

You could gain so much more out of your setup by converting to MAF. I suspect your low end throttle response leaves a little to be desired, but once you hit WOT she screams like a banshee.

The op is not swapping out cams so the stock 19s should suffice .
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Old 11-20-2013, 11:12 AM   #16
87 T TOP GT302
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Dawson 1112 thanks for your response. I believe I've gone as far as I can without converting to mass air. That being said it idles good for the most part .
You said something about gaining so much by converting to mass air .What would I gain other that fully controlled idle ? I mean performance wise is there any gain ? It seem to me to be a waste so what am I missing ? I've never had a mustang with mass air so I don't know what I'm missing or not.
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1987 GT W/T Tops 5.0 With ported/93 COBRA Heads W/1.7 RR . Professional Products intake w/65mm T/B Lunati 501A1LUN cam 272/282 duration and 477 lift but 506 wit 1.7rr 1 5/8 Mac equal length shorty headers W/ 2.5 full exhaust and Flowmaster super 40's, BBK underdrive pullies ,Had 2.73,3.55,4.10 ,and current 3.73 gears with aluninum drive shaft. Hypertech Chip.Just added 24lb injectors.
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Old 11-20-2013, 11:12 AM
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