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Secondary Timing Chain Upgrades (Read before upgrading)

bankyf

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While installing my OPG/CSS I decided to do a few extra upgrades. Boss tensioners, MMR tensioner bracket, GT350 primary chains and upgraded secondary chains were on the list. Having previously dropped a secondary chain on an 03 Terminator, I tend to worry a bit about them. When I started looking around, it seemed like Sai Li had a good option with their "Coyote Secondary Timing Chains HD Pair" and they were in stock with only a 2-3 day ship time so I placed the order.

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Upon opening the package they really didn't appear to be much, if at all, different from the chains I had removed so I pulled out the scale and caliper and this is what I found

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As you can see, what I received was hardly heavy duty as compared to OEM, and hardly lived up to the claims. I was unable to accurately measure the pin size without destroying both chains, but from what I could tell there was little or no difference, certainly not .030. Because I wanted to give him an opportunity to explain, I reached out to Sai Li to discuss my findings. I was told that Sai would return my call, but that never happened. With my project now on hold I decided that I trusted Accufab to provide me with the chains as they have been around almost 30 years and I have done business off and on with them for almost that long. Considering it was Friday and I was already held up by the Sai Li chains, I elected to spend the additional $75 to have them here on Saturday.

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Accufab clearly does not show the green links in their ad, but to my surprise, when I opened the box, I had another set of the exact same "green chains". I did open one of the chains to confirm that weight and measurements were identical. Prior to reaching out again to either company I wanted to do a little further research. I reached out to my Ford parts specialist and confirmed that the part number are and have always been the exact same for 2011-2020 Coyote secondary timing chains just in case Ford actually upgraded the chains at some point and the measurements advertised were in reference to an older chain.
At this point it was time to reach out to the vendors for a possible explanation. Because Sai had already elected not to return my call, I just called and asked to return the chains. I was told that because I had opened the package that they were not returnable. I let her know that they had been falsely advertised and that was my reason for requesting the return. She still insisted that I could not return them but offered to have Sai reach out to me to "walk me through how to install them"(LOL). She also said that they sell quite a few of these chains and nobody else has complained so the problem had to be me and not the chains. I let her know that I would be returning the chains whether she wanted to cooperate or not and I was told again that she would have Sai call me. As expected, the end of the business day passed with no call (dispute has now been filed on my CC).
I then reached out to Accufab. She had no problem with me returning them, but let me know that she could not refund my $75 overnight shipping. I asked if there was someone I could talk to about my findings and she said she would have him call me. A bit later she called back and said that he wasn't aware of any heavier duty timing chains available and that I was welcome to return them.

It doesn't seem that either of them wanted the opportunity to defend their overpriced (non)heavy duty chains. At this point I have ordered MMR chains and will update this with those specs when I receive them tomorrow. I found it interesting that MMR references the "green chains" as copycats that are no stronger than stock.
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larr12

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Good info. Keep us updated.
 

ice445

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lol 1 gram extra of material in a whole chain compared to the OEM one? Pretty sad.
 
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bankyf

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MMR for the win! In all honesty, I would have ordered the MMR instead of the Accufab last week, but they were closed for inventory. I got the MMR chains, an MMR T-shirt and overnight shipping for less than the pre-shipped price of the “green chains”.

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80FoxCoupe

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I came to the same conclusion you posted above last year. Apparently it is known, but not necessarily on this forum. But dont forget MMR's disclaimer about the red link chains. MMR says these chain are not recommended for use with aftermarket cams or springs. If you run stock components, you should gave just ran stock chains...

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80FoxCoupe

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I run the green link Accufab chains currently FYI. Aftermarket cams and springs, 9000rpm, 1272whp.
 
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bankyf

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I run the green link Accufab chains currently FYI. Aftermarket cams and springs, 9000rpm, 1272whp.
Yeah, I read the disclaimer. I figured that’s more of a CYA for them than anything. I honestly think the Coyote secondary chain failure rate may be a bit overplayed and over the weekend I had convinced myself to stick with stock, but when it came down to it I still had this overwhelming desire to put the timing components back stronger than I found them. I doubt I’ll ever run upgraded cams, but springs might be in my future.
 

andrewtac

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But dont forget MMR's disclaimer about the red link chains. MMR says these chain are not recommended for use with aftermarket cams or springs. If you run stock components, you should gave just ran stock chains...
Collecting parts for a build I was getting ready to buy chains. I had heard MMR was the ones that were actually bigger. However, the disclaimer kind of confused me. If I were to get different springs and valves, and turn higher RPMs I shouldn't use these chains. But the other two options are nearly the same size as stock, then should I run stock?
 
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bankyf

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Collecting parts for a build I was getting ready to buy chains. I had heard MMR was the ones that were actually bigger. However, the disclaimer kind of confused me. If I were to get different springs and valves, and turn higher RPMs I shouldn't use these chains. But the other two options are nearly the same size as stock, then should I run stock?
I think that’s a CYA. They want you to move up to their phaser delete option with billet guides for cams. I can’t blame them. They’ve been blamed for a lot of failures over the years, some maybe justified, many probably not. You’d probably be fine with stock, but the MMR is clearly a stronger option without going all out.
 
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80FoxCoupe

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Collecting parts for a build I was getting ready to buy chains. I had heard MMR was the ones that were actually bigger. However, the disclaimer kind of confused me. If I were to get different springs and valves, and turn higher RPMs I shouldn't use these chains. But the other two options are nearly the same size as stock, then should I run stock?
Not sure, thats a decision you will have to make. I can tell you that I've ran a stock on opened Gen 2 to 8200 RPM with a blower for years. Currently run the green chains on my build engine. It is what it is.
 

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80FoxCoupe

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I think that’s a CYA. They want you to move up to their phaser delete option with billet guides for cams. I can’t blame them. They’ve been blamed for a lot of failures over the years, some maybe justified, many probably not. You’d probably be fine with stock, but the MMR is clearly a stronger option without going all out.
Correction, it is clear that the MMR chain is heavier and slightly thicker. But that does not prove that it is stronger....
 

80FoxCoupe

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I think that’s a CYA. They want you to move up to their phaser delete option with billet guides for cams. I can’t blame them. They’ve been blamed for a lot of failures over the years, some maybe justified, many probably not. You’d probably be fine with stock, but the MMR is clearly a stronger option without going all out.
I understand CYA's. But would you buy Pistons that are marked not for racing, pants that say not for wearing or shoes that say not for running?
 
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bankyf

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Correction, it is clear that the MMR chain is heavier and slightly thicker. But that does not prove that it is stronger....
Valid point, which is why I gave both retailers the opportunity to explain why their chain was stronger despite clearly not meeting the advertised improvements (or really any visible improvements at all). Neither had any desire to do so. I will say that my secondary chain failure was a result of an outer link failing, so the substantially thicker outer link on the MMR definitely helps me sleep better at night.
 

80FoxCoupe

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Valid point, which is why I gave both retailers the opportunity to explain why their chain was stronger despite clearly not meeting the advertised improvements (or really any visible improvements at all). Neither had any desire to do so. I will say that my secondary chain failure was a result of an outer link failing, so the substantially thicker outer link on the MMR definitely helps me sleep better at night.
Without testing data, one will just have to assume the thicker and heavier chain is stronger. Who knows, testing could reveal that the OEM chain is superior. Example with motorcycle chains, a 520 aftermarket chain is dimensionally smaller, lighter and with a higher tensile strength than an OEM 525 chain. Food for thought.
 
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bankyf

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I understand CYA's. But would you buy Pistons that are marked not for racing, pants that say not for wearing or shoes that say not for running?
Would you buy parts for your street car that say off-road use only? The world is full of CYA disclaimers that people ignore without issue every day.
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