MAF sensor Inner and Outer diameters?
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Mike Licht
I was here first
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- May 23, 2001
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If you are concerned about flow and performance the 3.5" sensor from and LS1 Camaro/Firebird will give the best result
Mike
Mike
Mike Licht
I was here first
- Joined
- May 23, 2001
- Messages
- 4,642
The 3.5 measures air better than any other sensor it also pout flows most of the turbos with a small pressure drop. What size system are you trying to build I have a couple other options we could talk about
Mike
Mike
CTX-SLPR said:
Of the ones I have here, all the LT1 LS1, ie 3 and 3.5 sensors have a 2 5/8" inner bore. The 5 wire version has a inner diameter of 3 1/4".
What I like best was using a 3.5 sensor in a 3" housing with the air foils removed. Trouble was it fubar'd the MAF calibration, and that took alot of work to straighten out. This was before the 5 wire MAFs came into being.
If you're still thinking about a hi-po MAF system, while it would take some serious work, you could use a Ford MAF which is voltage rather then freq, and feed that into what would normally be the MAP input. WIthout knowing what the code is like in the ecm it's hard to say what you'd be facing, the oddities of what goes on with a MAP vs MAF say during crank to run mode might kill the whole idea, but again without the code it's hard to say.
Thanks Bruce,
I've started hanging out on the GTP and Regal GS boards to find out more about the computer systems they are using, especially the guys that have gone turbo. The interesting thing is that you can reprogram or rescale the MAF table in the computer so that the computer will know how much air corresponds to different frequencies off of the MAF, so an LS1 or any other GM MAF will plug in and you just match up the cal. It also looks like they have cracked the code enough to allow the use of a 3-bar MAP with the factory system. I'd have to have a full custom ECM done up to disable most of the controls and emissions junk as the available tuners don't get into that stuff. The project has been set back which allows me to take a lot of the time compromises I was planning on having out and go for a more full optimized/monkeyed with system.
Will the 5-wire MAF work with the Trans+ I'd like to keep a relatively consistent cross sectional area through the intake tract to avoid pressure drops, I'm planning on blowing through the MAF like you are doing so a 3.25" ID would be perfect for 3" piping.
I've started hanging out on the GTP and Regal GS boards to find out more about the computer systems they are using, especially the guys that have gone turbo. The interesting thing is that you can reprogram or rescale the MAF table in the computer so that the computer will know how much air corresponds to different frequencies off of the MAF, so an LS1 or any other GM MAF will plug in and you just match up the cal. It also looks like they have cracked the code enough to allow the use of a 3-bar MAP with the factory system. I'd have to have a full custom ECM done up to disable most of the controls and emissions junk as the available tuners don't get into that stuff. The project has been set back which allows me to take a lot of the time compromises I was planning on having out and go for a more full optimized/monkeyed with system.
Will the 5-wire MAF work with the Trans+ I'd like to keep a relatively consistent cross sectional area through the intake tract to avoid pressure drops, I'm planning on blowing through the MAF like you are doing so a 3.25" ID would be perfect for 3" piping.
CTX-SLPR said:
If the ecm is a high freq version then using a different high freq MAF is just coping over the table values of the new ecm into the existing code.
It would be interesting to see that MAP useage deal, gotta link?.
Yes, as I recall Bailey has a T+ for the later MAFs.
The late big MAF with 3->4" transistions, isn't have bad looking.
You really should drop by some time.....
hmmm... link, I'll dig that one up for you, but its very informative, basically just saying that yes you can do that but not saying how. The guys at Digital Horsepower seem to be the most on top if it and I believe that is Dave Buckshaws company. I have a Trans+, but I bets its an older one since its been on my self for atleast a year. You can have them updated right?bruce said:
As for stopping by... soon, give me a few for the holidays and pickup my project car. Its a secret till I get her home and moving.
Thanks,
CTX-SLPR said:
Had a little spare time today, and took a few pics of what you're looking at.
Those are 3->4" hose adapters. While hard to see, if you trim the large end just right, you'll min. the turbulence there. If the pipes pre, and post are say 9" or so long, and straight that shouldn't be much of a problem. The *normal* setups have alot of turbulence to deal with when running an unshrouded K+N, from what I've seen.
BTW, the ZO6 MAFs are screenless, but they're mounted in a way that mins the turbulence, and there migh be some extra code, to blend the signal some way.
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Good stuff Bruce. I'd be running blow through MAF, 9" of pipe on each side might not be possible though I was going to put it in the straight section between the outlet of the powerstroke IC and the bend just preTB. Which is better to optimize the up or down stream flow around the sensor?bruce said:
Thanks,
