Are you saying your AF ratio was 14.2 at WOT? If thats the case then yes thats severe! Put the screen back in! But if you are talking about it being that at part throttle when you are a hair on the rich side.
Chris
Are you saying your AF ratio was 14.2 at WOT? If thats the case then yes thats severe! Put the screen back in! But if you are talking about it being that at part throttle when you are a hair on the rich side.
Chris
2009 Silverado, HPTuners, all stock.
Yes that's at WOT. I can't put it back in it's long gone.
[1/8 mile E.T. - 8.23 @ 82.86 mph w/1.82 60'] '98swb,4/6drop,20"RozziDeeps on 275/40ToyoProxes '98LS1/4L60E,TRCheaTR cam,Ported TB,Billet MAF ends,MSD8.5 superconductor wires,S&P midlengths,!EGR,!cats,2 1/2" true duals w/X-pipe,Dynomax Ultraflows,TCI 3000,billet servo,TCI deep aluminum pan,3.73's w/Auburn posi; Eclipse CD, Rockford 6 1/2's, Memphis 12's, Punch 200 ix, Punch 500x
I have heard that the screen is to "smooth" the airflow through the MAF. If the screen is out i guess it "swirls" through the MAF and causes an inaccurate reading.
http://i76.photobucket.com/albums/j1...o/789547ee.jpg
1999 Silverado LS RCSB 5.3 Liter (16.02@83.5 bone stock) (with mods ??.?? @ ?)
STS Turbo Kit (5 psi), GT67, STS Intercooler, 42lb/hrs, 255 Pump, 212 216 Comp Cam, Nelson STREET Tuned, Eaton LSD, 4.11's, Phoenix ReTrans Stage 3 4L60E, 160 t-stat, B&M Supercooler.
I pulled the screen out of my vortec 350 and bored the casing out to 75mm. I also cut the MAF supports off so it only has vertical supports. This is pretty much the same as the GMS MAF now. I never ran lean, in fact it helped out with the NOS. As far as the GenIII motors go, I don't know so listen to these guys since they have more experience. I agree the screen is for directing flow because of the honeycomb direction. I guess I was lucky LOL
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
OK so I lied! I went and looked through the pile of parts left over from my swap and there it was, moderately damaged. I was able to reinstall it with the old maf ends and I went and drove the truck, hard to tell if it made any difference performance wise but it started and ran good and smooth(no cycling like their was avacuum leak like before). I think I'll drive it around for a couple of days and check my plugs. I checked my plugs after a few K-miles with it descreened and they were super clean not lean looking just super clean almost new looking.
[1/8 mile E.T. - 8.23 @ 82.86 mph w/1.82 60'] '98swb,4/6drop,20"RozziDeeps on 275/40ToyoProxes '98LS1/4L60E,TRCheaTR cam,Ported TB,Billet MAF ends,MSD8.5 superconductor wires,S&P midlengths,!EGR,!cats,2 1/2" true duals w/X-pipe,Dynomax Ultraflows,TCI 3000,billet servo,TCI deep aluminum pan,3.73's w/Auburn posi; Eclipse CD, Rockford 6 1/2's, Memphis 12's, Punch 200 ix, Punch 500x
yeah checking plugs is a good way to tell about your A/F mixture and if its burning cleanly or not.
Chris
2009 Silverado, HPTuners, all stock.
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