MelloYellow

What are people using to get above 58 lb/min? LS1 MAF Electronics with ported ends or an LS6 MAF and re-scaling the MAF tables??

Thanks.

1dirtyZ

iTrader: (1)

richen up the mixture using the injector flow rate.

MelloYellow

PE/rpm?

1dirtyZ

iTrader: (1)

nope , in the injector flow rate table just make the last number smaller to fool the pcm into thinking you have a smaller injector, thus opening it more ---> richnes <img border="0" alt="[angel]" title="" src="graemlins/gr_angel.gif" />

Cmarsh93z

I know harlan was working on a maf that could in the higher ranges...any luck with that? Also...what about the PCM limit of 62lb? Is it possible to change that within the PCM programming? Or would you need to use a bigger maf and scale the maf curve back(or possibly in half). Just trying to get the discussion going <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Chris
93Z T-88

RyanJ

Harlan using a 3.5" universal MAF cal'd to 12000hz or some crap. pretty sure they scale the MAF table back.

MelloYellow

The Extended Range LS6 MAF doesn't exist, right?

y2khawk

iTrader: (5)

The LS1 MAF can be pushed to the 512 g/s limit. I ran mine up to the point where i was exceeding the 12kHz frequency limit in the MAF table. That's why I went to the bigger MAF.

I'm running a Univer-MAF from Pro-M with basically a voltage to frequency converter to feed it into the PCM. The Univer uses the standard Hitachi hot wire ford guts with the standard tweaks from Pro-M.

I had the curve fit on the MAF setup to max the ouput at 12kHz with a flow of just about 1200 g/s. I now operate in the 10 kHz range with a rescaled table.

Once you get to the point of rescaling the MAF table you have to rescale alot of other stuff to compesate. And, all of the load calculation as well as spark g/cyl axis stuff becomes half what it use to be.

Not an easy task, but do-able.

If you fatten the A/F up with the PE or injector tables you end up with an excessive A/F once the MAF maxes. And then a progressively leaner mixture from there out.

If you're only going over the limit by a little, it can be accepatble. But far beyond the 512 g/s barrier and the mixture control get's iffy.

Just my .02 <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

MelloYellow

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by JAS:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by MelloYellow:
<strong>The Extended Range LS6 MAF doesn't exist, right?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Not from GM.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">We went over this before. Pace or yourself or someone 'might' start making one, but it doesn't exist yet, right?

Thx Harlan!

<small>[ December 20, 2002, 09:15 AM: Message edited by: MelloYellow ]</small>

AMS

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by JAS:
<strong>1) You guys act as if LS1's are the only cars with MAFs. MAFs have been around forever now!!!!

2) Calibrated MAFs have been around for a LONG LONG time. Think PRE LS1 also.

3) The way Harlan is doing his car is the way the Australians have been doing their LS1's for quite some time now. Harlan has the expertise to get it done here and is one of the few that shares information with everyone. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

4) Calibrating a MAF for extended range is not an issue, as Harlan stated accuracy is. Heck, we ran 38lb and 42lb injectors 1 1/2 year before LS1Edit was even a gleam. Yes, with calibrated MAFs. Just because Mr. Pxx, or Mr. Nxxxxxxx DIDN'T doesn't mean it doesn't happen in the world! (However, a GMHTP mag car did. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> )

5) I don't understand why you guys think the LS1 WORLD revolves around LS1TECH.com????? In fact, most of the COOL stuff has been done outside of this site and continues to be done that way. MOST of it isn't shared even by sponsors (trade secrets <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> ). Yet when someone does show you something you cry foul... hmmm</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Hey...thanks for taking the time to post "I have been there, done that". While you where doing that...Harlan actully posted some relevant info(which I am sure has been posted many times before).I guess rather than educate the masses which come to Ls1tech to seak info....we'll just keep it all "under raps" so people like you are the only ones in the "know" LOL!!!

Chris

<small>[ December 22, 2002, 10:43 AM: Message edited by: AMS ]</small>

y2khawk

iTrader: (5)

Play nice guys <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

The GN crowd has been fighting the MAF problem for years. And just think, they were limited to 255 g/s. Lots of GN's going fast so it can't be that bad <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

<small>[ December 22, 2002, 03:31 PM: Message edited by: y2khawk ]</small>

AMS

Nice post delete JAS....the text must have had some LS1 secrets you didn't want leaked. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />

Chris

<small>[ December 22, 2002, 02:54 PM: Message edited by: AMS ]</small>