spark plugs wires 8mm vs 8.5mm vs 10mm
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Cadillac Escalade, EXT and ESV Forum - 1999 - 2006 Discussion, spark plugs wires 8mm vs 8.5mm vs 10mm in Cadillac Escalade Forums; About to tackle the replacement of my spark plugs and wires. I am going w/ NGK TR5IX plugs, because I ...
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    z0lt3c's Avatar
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    spark plugs wires 8mm vs 8.5mm vs 10mm

    About to tackle the replacement of my spark plugs and wires. I am going w/ NGK TR5IX plugs, because I got a great deal on them but I've been doing alot of reading on old posts suggesting upgrading the stock 7mm wires. Most people suggested either 8.5mm or 10mm. Many posts reference affordable 8.5mm wire sets on ebay, for like $35, but all the links are no longer good. Here is what I found on ebay;

    Taylor 53005 8mm wires $35
    MAXX 532B 8.5mm wires $50
    OML 48314B 10MM WIRES $63

    Does anybody have any other suggestions for sources/price on upgraded wires? Are the 10MM overkill or is the extra $13 worth it?

    Thanks.

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    z0lt3c's Avatar
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    Re: spark plugs wires 8mm vs 8.5mm vs 10mm

    Not alot of feedback ... I've spoken w/ the distributor of the MAXX and OML product, they confirmed the MAXX 532B (blue) or 532R (red) kit should fit my 2003 Escalade 6.0 but the OML people suggested set 29192B instead of 48314B which is $79 vs $63. I think I've decided to go with a the MAXX 8.5mm product, should still be a decent upgrade from the stock 7.0mm wires and cheaper then the 10mm option. I will provide some feedback once I get them installed.


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    Quote Originally Posted by z0lt3c
    Not alot of feedback ... I've spoken w/ the distributor of the MAXX and OML product, they confirmed the MAXX 532B (blue) or 532R (red) kit should fit my 2003 Escalade 6.0 but the OML people suggested set 29192B instead of 48314B which is $79 vs $63. I think I've decided to go with a the MAXX 8.5mm product, should still be a decent upgrade from the stock 7.0mm wires and cheaper then the 10mm option. I will provide some feedback once I get them installed.
    If they do good I may get a set and upgrade mine soon

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    Re: spark plugs wires 8mm vs 8.5mm vs 10mm

    What are you hoping to accomplish by changing to an aftermarket wire??

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    At least 40HP at idle.

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    Maybe a smoother idle (hopefully)

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    Re: spark plugs wires 8mm vs 8.5mm vs 10mm

    This is nothing more than my opinion, ignorant or not. I believe the factory spends lots of money in R/D, perhaps more than the aftermarket world in some cases. In a stock application, its going to be very difficult to compete with the factory configuration in terms of balancing efficiency and performance. Of course changing the exhaust, injectors or tuning the computer will improve performance and perhaps efficiency to a point. By making these changes though, you're walking that fine line of beginning to use your car in a manner for which the factory hadn't intended. The factory believes in their stock configuration so much that they will offer a warranty on all of their parts for much longer than the aftermarket world. I'm not saying there's not a use for aftermarket parts, because there is. In a stock configured engine, I don't see any reason to upgrade the plugs or the plug wires if nothing else has been upgraded. As said previously, that's JMHO and I'm sure there are those that will disagree.

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    There will be no difference, in performance or idle quality, between OEM wires, and good aftermarket/"performance" wires, on a stock engine.

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    Agreed..... When i used to work at a dyno facilities here in So Cal we tested numerous performance products and dealt with many manufacturers, vehicle and component... It used to be very interesting to see customers spend good money on products for stock or modded vehicles and actually lose power, mostly because the product was meant to compliment another upgraded component, for example MSD coils would compliment a bigger spark plug wire better than the factory coils.... Not saying it would help or hurt but research is key.. My 2 cents

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    But, but... The kid at AutoZone said my car would be faster and get better fuel mileage!!!

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    Quote Originally Posted by MoistCabbage
    But, but... The kid at AutoZone said my car would be faster and get better fuel mileage!!!
    lmao.... as he should

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    Re: spark plugs wires 8mm vs 8.5mm vs 10mm

    Is it a fact that these aftermarket wires have a lower resistance (by many multiples) then the stock wires. If reducing this resistance will have any positive impact on stock engine performance is certainly debatable. There are plenty of posts already on this forum about these wires so I am certainly not the first to bring up this topic. At the very least, the thicker jacket on the aftermarket wires will better insulate the wires from damage/nicks. This is the least arguable benefit of this change. Based on my understanding of basic principles of electricity, it makes sense to me that lower resistance will also yield a stronger, more reliable, spark. This point is more arguable...

    This vehicle is 10 years old and 3 generations from current. I'd like to think technology has improved since this vehicle was produced and cost of part manufacturing has been reduced. I personally believe the vehicle comes from the GM in the most cost efficient package available, and 7mm wires on a bulk scale are cheaper then larger wires. In some cases, in present times, there is an opportunity to potentially improve upon the original equipment, without additional expense, compare to the state of the technology and market in 2003. When the OEM wires are $88 and the "better" aftermarket wires are $50, why not upgrade? Here is a picture from another post comparing the 10mm to the stock 7mm;


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    Oh, I'm not saying there aren't better wires, just that they won't make a difference with a stock engine/ignition system. If they're cheaper, go for it. However, you might have a problem with fitting them into wire holders.

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    Re: spark plugs wires 8mm vs 8.5mm vs 10mm

    Flashy advertisements and lower prices don't necessarily constitute "better." Of course, there are always exceptions to the rule.

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    Re: spark plugs wires 8mm vs 8.5mm vs 10mm

    I'm more concerned with whether or not the 8.5 or 10mm wires will work fine. This will never be a hot rod, just some fun upgrades like tuning and exhaust...maybe a cam down the road. Mainly I'm after 100% reliability at the moment and getting rid of the stupid rough idle.


    @OP, interested to hear your feedback on these

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