Any experience or educated info on using larger MAF--
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Melting Slicks
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Any experience or educated info on using larger MAF--
I have never been able to find deff info on the possible advantages of the larger MAF--does anyone make an aftermarket that is good (not the granny unit) is there any advantage to the larger oem unit--I assume it will flow better how much--can the intake setup take advantage of it etc---thanks Bill
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Re: Any experience or educated info on using larger MAF-- (NEPTUNEBILL)
You may want to consider holding off on this one a little longer. The LS2 is supposed to have a combination of larger intake goodies and it may be a good source of parts to upgrade your intake. The LSX intake results seem to show a bit of power by going to a larger TB, so it would indicate that increasing the size of the intake system is beneficial. If the MAF you are looking at is larger than the other parts of your intake, then it isn't going to be the limiting factor. I would wait until there are more results from 90mm LSX intakes and then see what 2005 LS2 parts are going for from GM(I hope they are less than the current LSX prices) and what size the new MAF is.
Todd
Todd
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Melting Slicks
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Re: Any experience or educated info on using larger MAF-- (BLK 98WS6)
I was thinking the same thing, if they are going with a 90mm on the ls2 than I would think they would develop a larger MAF as well and that may be the way to go---I already have a FAST 90mm intake and lg 90mm TB I am installing this week--just curious as to what if any restrictions may be had from the stock TB with the good ends I have on it--I have also considered porting a 85mm oem unit---
Burning Brakes
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From: Sunny Earthquake Country, USA On the Left Coast (which is becoming more Right!)
Re: Any experience or educated info on using larger MAF-- (NEPTUNEBILL)
NEPTUNEBILL,
I don't have the answer but the Mustang people have loads of MAF'S
in Muscle Mustang & FF Mag. They advertise many for years and years and the specs on their cars typically mention higher flow MAF'S so they must be effective and worthwhile!
Not a lot about MAF'S in the Corvette literature :confused:
Someone enlighten us.
Roy
I don't have the answer but the Mustang people have loads of MAF'S
in Muscle Mustang & FF Mag. They advertise many for years and years and the specs on their cars typically mention higher flow MAF'S so they must be effective and worthwhile!
Not a lot about MAF'S in the Corvette literature :confused:
Someone enlighten us.
Roy
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Melting Slicks
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Re: Any experience or educated info on using larger MAF-- (97 C5 Metamorphosis)
I'm with you Roy--these things are obviously very critical to the operation and everyone on the forum can quote cam profiles-head flow numbers etc and no one knows a damn thing about the MAF--I think I will see if the guys on ls1.tech and see if those guys know anything interesting---
Team Owner
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From: San Jose/Bear Valley CA
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Re: Any experience or educated info on using larger MAF-- (NEPTUNEBILL)
I am running a larger diameter MAF that operates at a higher freq. With the higher airflows that my engine experiences, the new MAF is able to meter the high air flow and send the info to the computer. Maybe you will be able to use this MAF as well?
VR :cheers:
VR :cheers:
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Melting Slicks
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Re: Any experience or educated info on using larger MAF-- (vetterdstr)
Steve sent you an IM--your air flow requirements are considerably higher than mine obviously I just wonder if I need a 90mm maf to go with a 90tb or does it become a restriction--will the newer 85mm maf with ends be significantly better than my stock 2000 unit without screen and ends--it seems most of us know nothing about the MAF--everyone is so busy building heads and cams I wonder if we are overlooking the MAF--I probably need to talk to Cartek and Lou next week to see what they do if anything in this dept---any input from the master of air flow would be more than welcome however---thanks Bill
Drifting
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From: CA
Re: Any experience or educated info on using larger MAF-- (NEPTUNEBILL)
The MAF definitely needs to be addressed. The problem is not so much the size as much as the fact that it cannot accurately measure airflow when approaching say 500rwhp levels. Pro-M has a univesal 90MM MAF that can be used along with their adapter box which translates the pro-m to a lower frequency our computer can read. Several of the FI guys on ls1tech are using this setup. The MAF is not that expensive, however to get the adapter box, etc it ends up almost 900.00. Pro-M was promising to come out with a ls1 specific MAF so if we all express interest to them it may help to solidify the project.
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Melting Slicks
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Re: Any experience or educated info on using larger MAF-- (cfi_luz)
I will look for their website and inquire about the 90mm unit that would seem to be a perfect setup--I wish I had one now so I could tune it in with the rest of the setup--thanks Bill
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Melting Slicks
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Re: Any experience or educated info on using larger MAF-- (cfi_luz)
Jeff-who made your rear fenders an extra inch is exactly what we need to run 12" or better ccw's with 345's--my viper came with 13" width with the 345s--my 11.5" ccw work great with the 335's but would love another 1" of wheel and the 345s
Drifting
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From: CA
Re: Any experience or educated info on using larger MAF-- (NEPTUNEBILL)
Bill,
The fenders are produced by http://www.corvetteracebodies.com. Kerry will be able to set you up with what you need. They run 630.00 for the pair. :thumbs:
The fenders are produced by http://www.corvetteracebodies.com. Kerry will be able to set you up with what you need. They run 630.00 for the pair. :thumbs:
Melting Slicks
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Re: Any experience or educated info on using larger MAF-- (NEPTUNEBILL)
I have never been able to find deff info on the possible advantages of the larger MAF--does anyone make an aftermarket that is good (not the granny unit) is there any advantage to the larger oem unit--I assume it will flow better how much--can the intake setup take advantage of it etc---thanks Bill
Bill, I have been asking a lot of questions on MAF size for big motors lately, and I have come to the conclusion that we really don't need a bigger one, and that in stock form, the 85mm shows worse velocity than the 75mm. Bigger is not necessarily better. If the proper ends were on the 75mm it would be the best one to have right now (when I say proper, I don't necessarily mean bigger or ported, just shaped right and the correct length). Most of the ends out there are junk because they weren't designed with air flow pattern/velocity in mind. Some induction systems actually will perform better with a smaller diameter MAF than one would think (again because of better velocity)
Having said that, I believe the Throttle Body is a different story, bigger can, and should be better in our case. And I'm not sure the 90mm is big enough for the 4xx ci. engines.
We will see, there is some stuff on the horizen that should be better. Time will tell.
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From: Phila PA, Bonita Springs FL
Re: Any experience or educated info on using larger MAF-- (Flyin'Brian)
I have come to the conclusion that we really don't need a bigger one, and that in stock form, the 85mm shows worse velocity than the 75mm. .
[Modified by YO-EL, 6:57 PM 3/1/2004]
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Melting Slicks
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Re: Any experience or educated info on using larger MAF-- (Flyin'Brian)
I was only running 6lbs of boost with the blower motor mainly because I already had a H/C package and 10.8cr and it ran at about 550rw and close to that in torque and i had no problem with the modified MAF--I think it will probably be adequate for the stroker but the blower pushed air through the MAF and now I am having to draw it--when I get the FAST setup on I will see if seems to be a restriction--and see what becomes available--I agree with Brian that a 90mm is probably not enough for a stroker anyway and would probably be perfect for a good H/C 346 car---
Melting Slicks
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Re: Any experience or educated info on using larger MAF-- (YO-EL)
I have come to the conclusion that we really don't need a bigger one, and that in stock form, the 85mm shows worse velocity than the 75mm. .
Really now.... Have you looked at the MAF flow charts from the 97-00 MAF to the 01+ tables???
Really now.... Have you looked at the MAF flow charts from the 97-00 MAF to the 01+ tables???
Here is what it says right on top of the graph The following graph illustrates the calibration differences between the years.
key words being calibration differences not flow differences.
Drifting
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From: CA
Re: Any experience or educated info on using larger MAF-- (Sir Sel)
I think the thing most people seem to be missing is not so much the fact that the MAF's don't physically flow enough air, its that they can only measure a certain volume of air. Now I dont have the calculations here anymore but I know that above 500rwhp N/A you are maxxing out the MAF and must rely on other tables to tune up top. Im sure a tuner could provide more information on the matter.
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Melting Slicks
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Re: Any experience or educated info on using larger MAF-- (cfi_luz)
Good point, the way things have been going I may have nothing to fear in breaking the 500rw barrier :lol: we'll see this week