MAF class 101
03-12-2009, 02:30 PM
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MAF class 101 Hey guys.. I'm installing an '04 LS1 from a C5 into my '69 Camaro. I'm also using the C5 wire harness, CPU and DBW set up.. I didnt get the MAF with the motor, so I was wondering if I need one or not? I see some conversion cars that look like they don't use one? I don't really understand their function, so I can't say either way if I need one or not??
I did some searching and found some threads that said yes use it, no - don't use, etc.. Use the SD instead?? Whatever that is?? And not sure what kind/size to get? 3wire or 5 wire? Internal or External IAF?? Again, whatever that is?? I need lotsa help in this area.. I'm a carb guy by heart, but I guess I thought I was ready for a challenge??
For what it's worth, the motor has been upgraded with heads, cam, 92MM FAST and a ported 90MM LS2 throttle body.. Appreciate any info.. Thanks in advance, Jason.
I did some searching and found some threads that said yes use it, no - don't use, etc.. Use the SD instead?? Whatever that is?? And not sure what kind/size to get? 3wire or 5 wire? Internal or External IAF?? Again, whatever that is?? I need lotsa help in this area.. I'm a carb guy by heart, but I guess I thought I was ready for a challenge??
For what it's worth, the motor has been upgraded with heads, cam, 92MM FAST and a ported 90MM LS2 throttle body.. Appreciate any info.. Thanks in advance, Jason. 
03-12-2009, 03:02 PM
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Why is eliminating the MAF the best bet for a swap setup? What are the advantages of having/ not having? If I don't need the MAF, then will the wire harness guy just elimenate that from my harness? And what does it mean to be tuned in SD? What does that stand for? (I searched 'SD' and nothing came up??) Thanks - appreciate the info..
03-12-2009, 03:40 PM
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Speed Density tuning is usually done for turbo or supercharged applications. There are a number of places that sell MAF's and MAF assemblies (Mass Air Flow). lingenfelter, for example, sells a MAF, 100 mm enclosure and they also have MAF tables for download. An experienced tuner can tune for MAF or SD. Tuning for SD is more difficult to get right but it saves the expense of buying the MAF and intake.
http://www.lingenfelter.com/Merchant...ode=L480000000
http://www.lingenfelter.com/Merchant...ode=L480000000
03-12-2009, 04:49 PM
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The new systems acutally use both. The MAF is more forgiving when doing mods and easier to tune. Once the MAF is dialed in it you should have better results. GM went MAF - SD then back to MAF but really a blend of the two. Ford did the opposite. If you want more info check out thirdgen.org. I was SD and am happy I am going MAF.
03-12-2009, 04:52 PM
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Speed Density tuning is usually done for turbo or supercharged applications. There are a number of places that sell MAF's and MAF assemblies (Mass Air Flow). lingenfelter, for example, sells a MAF, 100 mm enclosure and they also have MAF tables for download. An experienced tuner can tune for MAF or SD. Tuning for SD is more difficult to get right but it saves the expense of buying the MAF and intake.
http://www.lingenfelter.com/Merchant...ode=L480000000
http://www.lingenfelter.com/Merchant...ode=L480000000
Thanks for the great info! Sounds like you recommend having a MAF if the budget allows... At least from a tuning aspect.. I found a BRAND NEW OEM Delphi 85mm MAF Sensor for a C5 Corvette on E-Bay for $29.99. Would you recommend using that at the very least? I would rather not spend $300, unless I have too!!!! Will this size/ design restrict my air flow too much? Again, thanks for the info!!! I'm gettin' learned right good!
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03-12-2009, 04:56 PM
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The new systems acutally use both. The MAF is more forgiving when doing mods and easier to tune. Once the MAF is dialed in it you should have better results. GM went MAF - SD then back to MAF but really a blend of the two. Ford did the opposite. If you want more info check out thirdgen.org. I was SD and am happy I am going MAF.
03-12-2009, 05:08 PM
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03-12-2009, 06:07 PM
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Thanks for the link.. If I read that correctly, it sounds almost like a 50/50 split. Preference being with the proper tuner.. The Poll is quite lop sided towards the SD tune, but I think some people just voted based on what they 'heard' withouht having good knowledge of the subject.. SD tune seems to be favored on heavy mod and/or FI set ups and stock, or enhanced stock seems to be MAF tune prefered.. I'm going to be near 450 rwhp, so I guess I could go either way.. I think If I ran a MAF, I might have a better chance of getting a good tune and If I went SD tune, I might end up with a slightly better tune, but have to search a little harder for a good tuner.. Would you agree with my thinking? Or should I rely on the 'ole coin toss..
03-12-2009, 06:50 PM
#11
people, myself included prefer sd tune, its true that maf is more forgiving and will calibrate itself somewhat with minor mods,
FI, and aggressive cam and compression benefit more from SD tune, also eliminates the restriction of the maf itself and allows for any intake tract size.
if u are just in for 450rwhp, a stock c5 maf is plenty. no need for any aftermarket and such.
FI, and aggressive cam and compression benefit more from SD tune, also eliminates the restriction of the maf itself and allows for any intake tract size.
if u are just in for 450rwhp, a stock c5 maf is plenty. no need for any aftermarket and such.
03-12-2009, 06:53 PM
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If you go strictly on a basis of what MOST set up are using. Using the MAF wins easily. I would go this route as well because it's easier to tune and is really not a measurable restriction. A SD tune would be the best way to go on a boosted set up but it's harder to tune and will seperate the men from the boys tunner wise.
I would keep the MAF on the car. You can pick up a used one here fairly cheap. I would be a bit scared of that Ebay unit as it's just to cheap to be what they say it is.
Re'
I would keep the MAF on the car. You can pick up a used one here fairly cheap. I would be a bit scared of that Ebay unit as it's just to cheap to be what they say it is.
Re'
03-12-2009, 07:54 PM
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If you go strictly on a basis of what MOST set up are using. Using the MAF wins easily. I would go this route as well because it's easier to tune and is really not a measurable restriction. A SD tune would be the best way to go on a boosted set up but it's harder to tune and will seperate the men from the boys tunner wise.
I would keep the MAF on the car. You can pick up a used one here fairly cheap. I would be a bit scared of that Ebay unit as it's just to cheap to be what they say it is.
Re'
I would keep the MAF on the car. You can pick up a used one here fairly cheap. I would be a bit scared of that Ebay unit as it's just to cheap to be what they say it is.
Re'
03-13-2009, 04:54 PM
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Arrr.. The plot thickens.. Maybe I'll just cut a 2" hole in the MAF screen and I'll have the best of both worlds!!!! Actually I just ordered a new 85MM Delphi MAF and it does NOT have a screen in it..