85mm MAF's. Gains on cars with tuning?
03-22-2003, 05:35 AM
#1
85mm MAF's. Gains on cars with tuning? Do 85mm MAF’s really add power? If so, do they help in all applications? They’re included in the LS1 Motorsports Turbo kit so I guess they have to work well for something. I can see doing a SLP 85mm MAF on a car without tuning to let the computer know there is more air coming in but it would seem useless on a programmed car because you already adjust for the extra amount of airflow. In the case of a tuned car, you would just do MAF ENDS for even more additional airflow. What exactly are you paying for when you purchase the SLP 85mm MAF- the leaner air/fuel programming right? So it would actually seem more difficult to program a car with the SLP MAF because you have to combat the programming built into it. If you change that programming, you are canceling out the benefit of the MAF therefore losing your investment. Can anyone share some more insight on this subject? Thanks.
03-22-2003, 07:20 AM
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Re: 85mm MAF's. Gains on cars with tuning? On my car the SLP MAF appeared to be mixture
neutral. I didn't see any real performance
difference about town. This is unlike what I
see reported from other MAFs, where a larger
lean error is introduced. My reason for the
SLP was simply to get more flow cross-section
in one of the "pinch points".
The SLP MAF is not "programmed", they just solder
a resistor onto it to change the calibration to
match what the F-body expects instead of the
truck that the core was made for.
neutral. I didn't see any real performance
difference about town. This is unlike what I
see reported from other MAFs, where a larger
lean error is introduced. My reason for the
SLP was simply to get more flow cross-section
in one of the "pinch points".
The SLP MAF is not "programmed", they just solder
a resistor onto it to change the calibration to
match what the F-body expects instead of the
truck that the core was made for.
03-22-2003, 07:21 AM
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Re: 85mm MAF's. Gains on cars with tuning? I got a Granetteli 85mm from LS1 Motorsports ($150) and put only it on - went to the track last week and went time in sig. Dropped .06 sec and picked up 1.5 mph over old best. It seems to help most on the top end of the rpm range.
That was before tuning. Tomorrow I will see how the Predator tune does - I can feel a huge difference with it, so I am anxious to see the times.
The 85mm MAF does lean the car out a little bit (how much depends on the calibration put into it). The idea is to flow more air regardless of which one you look at.
I am glad I got mine and recommend the same one. I have heard of some people having problems with SLPs version. Mine worked well with my other mods (see sig).
Hope that helps.
That was before tuning. Tomorrow I will see how the Predator tune does - I can feel a huge difference with it, so I am anxious to see the times.
The 85mm MAF does lean the car out a little bit (how much depends on the calibration put into it). The idea is to flow more air regardless of which one you look at.
I am glad I got mine and recommend the same one. I have heard of some people having problems with SLPs version. Mine worked well with my other mods (see sig).
Hope that helps.
03-23-2003, 09:20 AM
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Re: 85mm MAF's. Gains on cars with tuning? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ragtop 99:
<strong> minimal or no gains on a tuned bolt-on car. I wouldn't buy a bigger MAF until you have heads & cam done. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well, I saw 1.5 MPH and .06 sec gain - worth it in my book!
<strong> minimal or no gains on a tuned bolt-on car. I wouldn't buy a bigger MAF until you have heads & cam done. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well, I saw 1.5 MPH and .06 sec gain - worth it in my book!
03-23-2003, 09:23 AM
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Re: 85mm MAF's. Gains on cars with tuning? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SStolen:
<strong> The maf is only 1 inch thick. Are you saying it is just bigger? 85mm vs. 75mm? It would seem MAF ENDS would do the same thing for a third of the price. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">When you do ends - the MAF in the middle is still 75mm. Ends help by smoothing out the flow into the MAF. When you do 85mm - the whole thing is 85mm! Lay them side by side and you'll see a big difference.
<strong> The maf is only 1 inch thick. Are you saying it is just bigger? 85mm vs. 75mm? It would seem MAF ENDS would do the same thing for a third of the price. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">When you do ends - the MAF in the middle is still 75mm. Ends help by smoothing out the flow into the MAF. When you do 85mm - the whole thing is 85mm! Lay them side by side and you'll see a big difference.
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03-23-2003, 09:50 AM
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Re: 85mm MAF's. Gains on cars with tuning? I have the SLP 85 MM Maf (descreened) on a tuned (LS-1 edit) bolt-on '99 M6. I do not have any bef. and after results buy when Mike at Rapid tuned my car he said it was about 5-10 RWHP higher than cars with the same mods that I had. He & I attributed it to the MAF and Bauer ported TB. My curves looked great with this MAF after LS-1 edit. I do however have a random SES light that pops up from time to time that I think is being caused by the MAF. Each time I reset the PCM the light goes out and stays out so I know nothing is wrong, but it is a PITA to have to re-set and re-learn the PCM twice a month.
Hope this helps,
-Nick
Hope this helps,
-Nick
03-23-2003, 11:21 AM
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Re: 85mm MAF's. Gains on cars with tuning? I have a descreened SLP's 85mm maf on my 2001 Firehawk and my husband has GMAF on his 2001 WS6. Both of them work great. The GMAF came with no screen in it. Both of them work great and gained about the same amount of power from both, about .15 faster at the track. Just calibrate them with Edit if need be. Mine needed about 5% added and my husband's about 3%.
03-23-2003, 11:28 AM
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Re: 85mm MAF's. Gains on cars with tuning? I get the ses with my SLP MAF. get it when I drive around in lower gear in town. I let it go and it resets or fixes its self. takes a few times of driving maybe 2-3 days. but i hardly drive it much. most of the time it stays off, try not so many rpms in town <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
