Tensioner

Slow 99

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Anyone know of a better alternative to a 98 cobra tensioner? I'm using one on my 99 gt and I think I want to try and upgrade to reduce belt slip as much as possible without swapping to an 8 rib conversion
 

Dean98

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American racing solutions tensioner's are fantastic!! I had problems with my 04 Mach 1 and 03 Cobra breaking belts and tensioner's, I have a thumper tensioner if your interested, it will definitely fix your issue, but American Racing solutions tensioner's are far better ! Look them up and speak with the owner Frank , great guy and helpful!!! Good luck Dean

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DSG2003Mach1

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American racing solutions tensioner's are fantastic!! I had problems with my 04 Mach 1 and 03 Cobra breaking belts and tensioner's, I have a thumper tensioner if your interested, it will definitely fix your issue, but American Racing solutions tensioner's are far better ! Look them up and speak with the owner Frank , great guy and helpful!!! Good luck Dean

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this an interesting post because someone on IG was starting to post info about ARS being made by Thump
 

Slow 99

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American racing solutions tensioner's are fantastic!! I had problems with my 04 Mach 1 and 03 Cobra breaking belts and tensioner's, I have a thumper tensioner if your interested, it will definitely fix your issue, but American Racing solutions tensioner's are far better ! Look them up and speak with the owner Frank , great guy and helpful!!! Good luck Dean

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How much do you want for the thumper? and will it work for my 99?
 

01yellercobra

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What's your pulley combo? There's a point where no matter how tight you make the belt you're going to have slip. And a tight belt tears up main bearings.
 

CobraSam

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Wow, ARS tensioner looks like a piece of art!! Beautiful. But, for that price I’d rather have a little belt slip. You get what you pay for, I understand.
I use a 05+ Roush tensioner on my 04 Cobra. Not 100% but I believe it will work for you. I had to shim it with a few washers. Also, Steeda makes one at about the same price point.
ROUSH Mustang Belt Tensioner, Heavy Duty 4.6L 3V (2005-2010)

might work for you....?
 

Slow 99

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Wow, ARS tensioner looks like a piece of art!! Beautiful. But, for that price I’d rather have a little belt slip. You get what you pay for, I understand.
I use a 05+ Roush tensioner on my 04 Cobra. Not 100% but I believe it will work for you. I had to shim it with a few washers. Also, Steeda makes one at about the same price point.
ROUSH Mustang Belt Tensioner, Heavy Duty 4.6L 3V (2005-2010)

might work for you....?

Thank you for the info, I’ll look into that


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01yellercobra

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I have a 3.2 pulley with minimal belt slip but I’m cranking up the boost soon so I just wanna be safe


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Yeah, you're right on the edge of that. IIRC 3" was the size it was time to move to an 8 rib. There just isn't enough surface area for belt contact. I ran a 3.4" on a D1 and no matter what I did it would slip. Including having a belt so tight it took two people to put it on. It tore up the front main bearing too.

My final set up was an F1A with a 12% crank pulley and 3.9 blower pulley, 8 rib swap, and a Thump tensioner. Never had slip and it didn't kill the main bearing.

Swapping to the 8 rib now will save you many headaches down the road.
 

Slow 99

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Yeah, you're right on the edge of that. IIRC 3" was the size it was time to move to an 8 rib. There just isn't enough surface area for belt contact. I ran a 3.4" on a D1 and no matter what I did it would slip. Including having a belt so tight it took two people to put it on. It tore up the front main bearing too.

My final set up was an F1A with a 12% crank pulley and 3.9 blower pulley, 8 rib swap, and a Thump tensioner. Never had slip and it didn't kill the main bearing.

Swapping to the 8 rib now will save you many headaches down the road.

Yea I’m switching to a d1sc and I’ve got a 3.2 pulley that’s coated and I just bought a thump tensioner so if that doesn’t work I’ll probably go overdrive crank with a bigger pulley like a 3.6 or something. But I’ve also heard good things about the 8 rib conversion so that might come first over the overdrive crank


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DSG2003Mach1

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Yeah, you're right on the edge of that. IIRC 3" was the size it was time to move to an 8 rib. There just isn't enough surface area for belt contact. I ran a 3.4" on a D1 and no matter what I did it would slip. Including having a belt so tight it took two people to put it on. It tore up the front main bearing too.

My final set up was an F1A with a 12% crank pulley and 3.9 blower pulley, 8 rib swap, and a Thump tensioner. Never had slip and it didn't kill the main bearing.

Swapping to the 8 rib now will save you many headaches down the road.

you aren’t the guy that Had a red automatic Mach1 back in the day are you?
 

DSG2003Mach1

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No. I had a zinc yellow 01 Cobra with a big bore stroker.

Wait, I think I know who you're talking about. And if that's the guy I'm actually offended.

Lol I just remember him having a fast ass mach1, don’t know anything else about the guy
 

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