MAF Question
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Race Director
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From: Fort Wayne IN
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MAF Question
Ok, car is getting baseline tuned today on a 97-00 MAF. However, I'm wondering if it's going to be a restriction when we crank the boost and do the full tune.
Would it be worth it to upgrade to a 85mm ZO6 maf or go one step further and do a later styled drop-in MAF in a custom housing??
Would it be worth it to upgrade to a 85mm ZO6 maf or go one step further and do a later styled drop-in MAF in a custom housing??
Thread Starter
Race Director
Joined: Mar 2004
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From: Fort Wayne IN
2025 C5 of the Year Finalist - Modified
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Getting that setup in and running isn't the issue, my biggest thing is IF it's necessary. My tuner stocks the Sky Redline MAF which is probably the same thing as what everyone else uses seeing as how GM likes to use the same parts on different cars.
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Race Director
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From: Fort Wayne IN
2025 C5 of the Year Finalist - Modified
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377 LS3 shortblock, 317 heads, GT2-3 cam, APS tt with filters directly on inlets, going to tune it to 14 PSI on pump gas/meth.
1st Gear
Joined: Aug 2007
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I have a 02 Z06 with the LS2 7.0 427 engine. I've installed to vararam air intake and a 90mm thottle body. Im thinking of changing my stock maf to a performance one. Do u guys no which maf would be best for my set up. I'd love to hear from u guys. FYI- performance transmittion, gears, clutch, and headers installed
Last edited by Tommy Moss; Aug 22, 2009 at 02:32 PM. Reason: spelling
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Safety Car
Joined: Jun 2004
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From: Bella Vista Ca
Ok, car is getting baseline tuned today on a 97-00 MAF. However, I'm wondering if it's going to be a restriction when we crank the boost and do the full tune.
Would it be worth it to upgrade to a 85mm ZO6 maf or go one step further and do a later styled drop-in MAF in a custom housing??
Would it be worth it to upgrade to a 85mm ZO6 maf or go one step further and do a later styled drop-in MAF in a custom housing??
Former Vendor
Joined: Feb 2004
Posts: 10,876
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From: Las Vegas NV
St. Jude Donor '06 & '12
I absolutely agee.. You are running out of MAF wayyyyy early in the run. The tuner is blindly adding fuel.
Ditch it all together. You have already gone way past the allowable limits.
Remember, a larger maf doesnt really give you the ability to run more boost. Although it gives you slightly more room in the tune, its nominal when your looking at 14psi on a forged motor. Your talking 2 to 3 thousand RPM's worth of blind tuning.
I am a fan of MAF tuning. I dont believe in immediatly ditching the MAF, unless its absolutely necessary. In your case, its absolutely necessary.
Ditch it all together. You have already gone way past the allowable limits.
Remember, a larger maf doesnt really give you the ability to run more boost. Although it gives you slightly more room in the tune, its nominal when your looking at 14psi on a forged motor. Your talking 2 to 3 thousand RPM's worth of blind tuning.
I am a fan of MAF tuning. I dont believe in immediatly ditching the MAF, unless its absolutely necessary. In your case, its absolutely necessary.
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Race Director
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It's looking like it's going to be a SD tune anyway because the O2's aren't cooperating.
Racer
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From: Twister Country
Thread Starter
Race Director
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From: Fort Wayne IN
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No, the placement is making them very lazy. I had an open loop 2bar tune on it before, my current tuner prefers MAF for economy purposes but isn't object to going SD. He said at 14lbs and a couple of HP Tuners add-in's he can get me fueled correctly all the way up. It'll be tight he says, but it's perfectly doable within the table range.
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Melting Slicks
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From: Houston
There is a big difference between what "gets it done" and what gets it done the best way. Tricking the pcm in a way that it does not see boost on a car with 10psi+ is asking for it imo.
Former Vendor
Joined: Feb 2004
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From: Las Vegas NV
St. Jude Donor '06 & '12
Thats not a problem at all. In your tune, you can adjust the O2 switching in HPT. If your O2 sensors are placed in an improper area, and its throwing off the way they read, just scale it accordingly. This happens on some long tube header designs where the O2's are placed too far down in the header, causing them to read the exhaust pulses wrong.
Even when you run SD, you are going to run Closed Loop SD. This means that you still use your front O2's to adjust fueling. You dont even want to run Open loop SD unless your a diehard tuner that runs around with his laptop in his car 24/7.
Even when you run SD, you are going to run Closed Loop SD. This means that you still use your front O2's to adjust fueling. You dont even want to run Open loop SD unless your a diehard tuner that runs around with his laptop in his car 24/7.