TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Those who did the AFPR TBI mod.....

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Old Nov 16, 2001 | 07:16 PM
  #1  
Pukka's Avatar
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From: Where the chicks absolutely LOVE the V-8 rumble!
Car: 92 RS - Fully Restored w/Custom Int
Engine: LO3 with some mods
Transmission: T-5
Axle/Gears: 3.42 Richmond
Those who did the AFPR TBI mod.....

Since I haven't pieced together a fuel pressure guage yet,

I was wondering how "high" the tab on the FPR needs to be for the best performance.
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Old Nov 16, 2001 | 08:06 PM
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
Tune it with the performance, not by any set value. They're all different anyways, you'll range at least 2psi and that's a BIG difference.
Get your hands on a scanner and adjust the fuel pressure until your BLMs are around 126, this will be slightly rich but it's better than being lean. Okay?
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Old Nov 17, 2001 | 08:20 AM
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From: Where the chicks absolutely LOVE the V-8 rumble!
Car: 92 RS - Fully Restored w/Custom Int
Engine: LO3 with some mods
Transmission: T-5
Axle/Gears: 3.42 Richmond
Darn, I was hoping I could be lazy!!

Anyway, I've got a scanner in the garage collecting dust so I guess I'll get on it sonmetime next week.

Thanks!
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Old Nov 17, 2001 | 09:33 AM
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OK, I'm an idiot. What scanner do I need, and what the heck are BLM's?
SC
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Old Nov 18, 2001 | 12:55 AM
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From: Tulsa, OK
Any automotive scanner. In this forum, there's a topic "Free scan software.." that gives you a link to some software, and instructions for building an interface cable to connect your car to your PC. If you look in the DIY-PROM section, you can get links to several software and hardware (handheld) scanners, with approximate prices and part numbers.

BLM is short for Block Learn Mode, which is also known as "long-term fuel trim". This is expressed on a scale from 0 - 255, where 128 is the point where the fuel is not being added or subtracted.
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