1993 Throttle Body porting.....the finishing EXTREME touches - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 08-18-2005, 11:01 PM   #21
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Quote:
Originally Posted by Foghorn
Quote:
Originally Posted by willwren
And the MAF tables in my PCM have been adjusted.
Awesome! Can you monitor the STFTs and LTFTs with your scanner? Do you have easy acces to make further changes to the MAF table?

Cheers,
I can watch both short and long term fuel trims. I can also have Jet adjust the MAF tables based on that if necessary. It helps to have a second Bonneville to drive while it'* reprogrammed.

All in the quest to prevent having to use an AFC Calibrator.

Keep in mind, that I also have a spare throttle body, and will have the hybrid Supercharger complete, so I can throw the stocker back on at any time. Hybrid will come into use with a 2.5" pulley, stocker will remain at 2.2". Hybrid may go smaller based on scan data.
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Old 08-18-2005, 11:12 PM   #22
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Well then, since you do have access to changing the MAF tables, with carefull observation you can adjust the MAF table to near perfection. Since the MAF has much more granular adjustments than the AFC you'll have a much better tune all said and done.

Have a beer for your efforts

Cheers,
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Old 08-19-2005, 12:53 AM   #23
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What about taking some material out of the MAF bracket? In the first picture it looks like there is still some stuff around the sides that could be deleted.
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Old 08-19-2005, 01:46 AM   #24
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There'* a point in porting where the outlet of the TB and the inlet of the SC are the limiting factors. Taking more out of the TB MAF assembly would be pointless now. I've increased the flow capablility AND decreased turbulence.
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Old 08-19-2005, 04:08 AM   #25
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Nice. I'm a little sidetracked playing with my beater but I'll be watching this.. Don't tell anyone, But I haven't driven the Bonneville in a week, She sits like a princess.
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Old 08-19-2005, 11:28 AM   #26
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I'm encouraged by your testing. You didn't seem to have problems with your porting. So this will answer the L67 question. She should be running (idling) on the evening of the 23rd.
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Old 08-19-2005, 05:43 PM   #27
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Quote:
Originally Posted by Damemorder
Nice. I'm a little sidetracked playing with my beater...
"playing with your beater"??
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Old 08-19-2005, 07:12 PM   #28
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Quote:
Originally Posted by macho_mike21
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Nice. I'm a little sidetracked playing with my beater...
"playing with your beater"??

Hahaha.... way to be on top of that one, Mike. Lol.
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