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Old 09-17-2009, 05:28 PM
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Question for those with MDS disabled...

It is about time to change my spark plugs and I know that the 5.7L in stock form really needs the copper champions for the MDS to operate normally. But since I have MDS disabled I was thinking about using a platinum plug.

So, has anyone with their MDS disabled changed their plugs, and what plugs did you use?
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Old 09-18-2009, 08:21 AM
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Re: Question for those with MDS disabled...

i used NGK Vpower, noticed no issues with MDS

http://myworld.ebay.com/hensonmotors
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Old 09-18-2009, 08:56 AM
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Re: Question for those with MDS disabled...

Do you think it runs better than the stock coppers?

The main reason I asked is because I've read of people not using the coppers with the MDS and they get hesitation/stalling issues. But since I'm not using MDS anymore my thinking is that it won't matter anymore.
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Old 09-18-2009, 07:06 PM
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Re: Question for those with MDS disabled...

ive had those in for a while, before i turned MDS off, and after. the NGKs run awesome. i love em.
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Old 09-18-2009, 07:09 PM
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Re: Question for those with MDS disabled...

Jon which exact V-power ones did you use? I am looking at a whole list of them and I don't know which ones to get. lol
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Old 09-18-2009, 07:40 PM
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Re: Question for those with MDS disabled...

what kind of gas mileage can you get with the MDS disabled? Or is everyone enabling the MDS when they go on a highway/freeway trip? I saw a post (can't find it or remember who) that said they were getting 20++mog witht the 93 Diablo tune and MDS disabled...was that accurate or am I totally making things up??

how does everyone like having the MDS disabled? Aside from gas mileage...how is the consistent performance? Any shifting differences or other changes?
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Old 09-19-2009, 09:44 AM
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Re: Question for those with MDS disabled...

i didnt notice much of a milage change, but i also didnt care after turning it off for a while. with my exhaust i just hated the constant 4 banger noise.


i cant remember wich ones i got, it was to long back to find on my ebay list. it might be the 4306's but try emailing him, hes a good person and usually responds fast. he should point you in the right direction, i think i also put in $40 for the offer price to
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Old 09-19-2009, 03:19 PM
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Re: Question for those with MDS disabled...

Is there a reason not to use the stock plugs? There is no performance gain, for Normal street driving, using different plugs...

If the cost for stockers is high, then i could understand. otherwise just use what came stock... then guarenteed to not have any issues...
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Old 09-19-2009, 03:52 PM
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Re: Question for those with MDS disabled...

they are saying that when you disable MDS via diablo or other tuner, there is a hesitation/lag with the stock plugs b/c they are made for the MDS system...i too am a big proponent of using what came with the vehicle UNLESS you make modifications, then you have to adapt to what you have tweaked!
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Old 09-19-2009, 07:23 PM
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Re: Question for those with MDS disabled...

Ahhh i guess i misread that......

Doesn't the MDS thingy give you some decent MPG... or is it BS....
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Old 09-19-2009, 07:25 PM
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Re: Question for those with MDS disabled...

Decent MPG. LOL!
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