Forced Induction Superchargers | Turbochargers | Intercoolers

limits on boost with ls1 edit

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Old Jan 7, 2004 | 03:30 PM
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Default limits on boost with ls1 edit

at what point(boost wise)does edit hinder more than help?
I just was thinking these are 2 bar map,and yes you can adjust
calc. airflow in edit but when does it become unreliable for boost,
above 15,20,25 PSI?

I will be dropping my compression very low 7.0 to 8.0-1 somewhere in this neighborhood to run higher boost on pump gas is why I inquire on this
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Old Jan 7, 2004 | 03:33 PM
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good question! anyone?
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Old Jan 7, 2004 | 03:40 PM
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It's not a boost limit, it's a flow limit that causes problems.

Anything over 512 g/s and you have to start playing games with edit, and MAF's.
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Old Jan 7, 2004 | 03:50 PM
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well then riddle me this,
is it better to put the MAF on the upstream
of the compressor or downstream, because flow
readings will be different.
which will give you a more wider range to work with?
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Old Jan 7, 2004 | 03:52 PM
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flow readings will be the same, it's MASS flow not volume.

Unless you have leaks, it's the same before or after the compressor
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Old Jan 7, 2004 | 03:55 PM
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or 450 g/s if you have a 98 (470 if you use a lt1 maf)
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Old Jan 7, 2004 | 04:00 PM
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now the truck maf on a 98 calculated correctly only goes to like 390ish g/s
have you tried one of these mighty?
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Old Jan 7, 2004 | 04:01 PM
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I know I hit my max with 11-12 psi. But we are working on a little trick. hehe.
Off subject, but harlan did you get my e mail?
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Old Jan 7, 2004 | 04:03 PM
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I am guessing you are not wanting to fill me in, are you?
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Old Jan 7, 2004 | 04:03 PM
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i looked up every flow sheet on every stock gm maf i could find... best one is the lt1 maf... the higher the number the better..

i had an ls6 maf that topped off at like 350g/s and switched back to the stock meter because the ls6 maxed the Hz at about 3000rpm
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Old Jan 7, 2004 | 04:05 PM
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forgot to mention, after that you just dump in fuel linearly in the p.e. table linearly ramping up with rpm starting at the rpm you get to 11250hz.. its a big band aid, but got the job done for me
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Old Jan 7, 2004 | 04:05 PM
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mouse, where did you find a file for edit?
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Old Jan 7, 2004 | 04:08 PM
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the maf flowrate file? found the lt1 one on camaroz28.com and i think i found the others by asking around on here. if you want something specific i can email it to you if you want, or even my entire latest edit file i used during the dyno and racing....but mind you that its turbo specific.
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Old Jan 7, 2004 | 04:33 PM
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I did not even realize mouse, you live in richmond...
I live in hampton va. mail me your file if you can to cstead@***.net
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Old Jan 7, 2004 | 04:59 PM
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Matt, what is the deal regarding running and calibrating a Pro-M MAF, they can go over 512 g/s? I had a long convo with Scott Beers once but talk to like four guys like that a week I can't remember it all.

I'd rather see folks use the best MAF they can, as long as the price is reasonable. Scott was saying like ~$400 for one of their LS1 FI MAF's.
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Old Jan 7, 2004 | 05:18 PM
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email sent. .. also that tune was used to a maximum of 11,800hz or so.. a t-88 can most certainly move more air than that.
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