MAF Mod followup - Page 5 - 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 10-19-2004, 02:17 AM   #41
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Quote:
Originally Posted by BonneMeMN
Maybe the fuel filter is clogged, and limiting your PSI? Or a bad regulator?
Good point maybe it is a filter problem?

The tables are looking better though, good job.
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Old 10-19-2004, 02:19 AM   #42
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Me and Will worked on it this evening and we're pointing at the FPR. Did a deadhead pressure test and got 60psi, the pump is capable.
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Old 10-19-2004, 01:45 PM   #43
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And Dame smells like fuel. We took it step by step a couple times. Really looks like the FPR for sure, but a question came up. Anyone know what the BENCH pressure should be for his 93 fuel pump (non-supercharged)???
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Old 11-02-2004, 07:13 PM   #44
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New to the post. . . . . .Are you modding the MAF? or Porting the Throttle Body?? If you are Modding the MAF what are you doing to it and why? Your not going to outflow it! And if you are porting the Throttle Body, remember that velocity is the key in a N/a. I've heard from the fiero guys and ZZP that OBD 1 can't take much customizing with out some kind of AFC. As for your knock issue, WTF? 15* @ WOT?? You should be like 40* and with no knock at all! Did anyone else notice the trans temp?? Is that reading disabled on that year? That seems really High!
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Old 11-02-2004, 07:16 PM   #45
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Porting the TB, Pics on my website.

The tranny is on it'* way out, A year left, Max.
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Old 11-02-2004, 07:47 PM   #46
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Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by llBlazin_llLo
Did anyone else notice the trans temp?? Is that reading disabled on that year? That seems really High!
If memory serves 1994 was the first year that the tranny tem was enabled in the bonnevilles..
Mine changes... Never really watched that close... I just get to see the magnets
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Old 11-07-2004, 12:43 PM   #47
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so whats the word on this?
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Old 11-07-2004, 01:06 PM   #48
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It must have been the fuel pressure.
30-40 psi is low.
The pump is rated at 60 psi.
With the vacuum line pulled, the fuel pressure should be about 56 psi.
With it connected, it should drop about 4-5 psi.

My original FPR was low by about 5 psi.
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Old 11-07-2004, 02:55 PM   #49
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FPR'* are spendy. Took me a little time to get ahold of one, I actually ordered it yesterday. It'll be here Tues.
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Old 11-07-2004, 03:03 PM   #50
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I'm wondering how this MAF mod would compare between L27 and L67. Volume and flow rates are totally different. It may work for one better than the other, with the L67 not necessarily being the better achiever from this.

If I had a spare TB.......
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