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MAFs and Throttle Bodies

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Old Aug 10, 2003 | 06:26 AM
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Dual 5Ls's Avatar
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From: Edmonds, WA
94 Wagon, 13 ML63
MAFs and Throttle Bodies

After talking to a friend of mine about my choking problem in my 500, he suggested looking at the MAF. So, heres what I'm thinking and wondering:
If the 600 engine has a single MAF and throttle body, I could use those in my 500 as they'd flow more air since they would be (or should be if they're not) bigger. More air=more power. I'm aware the computer might not like that, but computers are run by software, and software can be changed. Any 600 guys out there know if you have a single MAF and throttle body? Anyone else think this will work or have comments?
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Old Aug 10, 2003 | 01:56 PM
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more air does not always = more power. it is the added fuel that makes the power, not the air. yes you need more air for more fuel, but the same applies the other way. you need more fuel for more air. so if your new maf flows more air, unless the computer, and or injectors can add more fuel to go with your air, you will not see any more hp.
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Old Aug 12, 2003 | 06:45 PM
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Dual 5Ls's Avatar
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From: Edmonds, WA
94 Wagon, 13 ML63
Originally posted by nov0798
if your new maf flows more air, unless the computer, and or injectors can add more fuel to go with your air, you will not see any more hp.
Hence the computer remapping.

I think the 600 engine uses dual MAFs anyway, so I'm out of luck on that idea . Guess I'll have to use stock....
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Old Aug 25, 2003 | 06:34 PM
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From: New Milford, CT
'97 Renntech E60RS
Put a Mosselman blower on your car, you won't have a choking problem after that (you might, but the car won't).

David Hendy

'92 500E some upgrades
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Old Aug 25, 2003 | 07:15 PM
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'97 Renntech E60RS
Mistake here, sorry I meant Koenig not Mosselman, easy to mistake these European Tuners with the unusual names (why are they never called Smith or Jones?)

http://www.koenig-specials.com/

David Hendy
'92 500E Some upgrades
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Old Sep 2, 2003 | 02:10 PM
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Re: MAFs and Throttle Bodies

Originally posted by Dual 5Ls
After talking to a friend of mine about my choking problem in my 500, he suggested looking at the MAF. So, heres what I'm thinking and wondering:
If the 600 engine has a single MAF and throttle body, I could use those in my 500 as they'd flow more air since they would be (or should be if they're not) bigger. More air=more power. I'm aware the computer might not like that, but computers are run by software, and software can be changed. Any 600 guys out there know if you have a single MAF and throttle body? Anyone else think this will work or have comments?
What choking problem? Loss of pressure before and after the MAF meter? Have you measured your pressures? I would guess the loss to be minimal and any change here to yield a correspondingly minimal improvement.

Although anything is possible... OBDII cars, especially LEV and ULEV engines have very complex and refined ECU systems that use many many imputs and have massive programming hours from the factory. Changing this is not easy. It would make more sense to make the MAF "think" it is larger by improving the feed to it with a best effort cold air induction system.
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Old Sep 3, 2003 | 04:39 AM
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Bernanke's Avatar
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stock system is not optimum at all.

yes you do need more fuel with more air, but at stock setting there is more fuel than air being used so opening up the intake end will always help. only if you are really pushing alot more air in would remapping be required.

more incoming air will always help but you may not be getting your full potential with stock software.

hope that helps
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