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TDR Belt Tensioner for 90-05 Miata with the M45 or MP62 Superchargers


Price: $205.00
Item Number: TDR-TEN4-BKT
Manufacturer: Track Dog Racing

If you have the original belt tensioner from the JRSC or Moss kit, take a look at the TDR Belt Tensioner Bracket. This innovative product makes tightening the supercharger belt a snap. And TDR has taken the Belt Tensioner Bracket one step further by adding new steel flanged idler pulleys designed to keep the belt inline. These pulleys are virtually indestructible and will not get damaged from belt wear. 

TDR Tensioner versus Moss Tensioner

TDR Tensioner Compare

Thinking of upgrading your old JR M45 or MP62 4-rib supercharger belt tensioner? A new drive belt stretches and requires 2-3 adjustments before reaching near the longest stretch. The older style JR tensioner bracket requires several bolts to loosen in order to make a simple tensioning adjustment. The new Moss tensioner is a nice improvement over the old style, but falls short in tensioning travel (maximum of 1") and is not as solidly mounted as the TDR Tensioner with its two-piece design. 

The TDR Tensioner is made from 1/2" aluminum for solid strength -- no flexing. The pulley tensioner adjustment offers over 2" of travel, giving you plenty of room to install your drive belt and to adjust proper tension. High speed, high temperature steel ribbed pulleys provide a much better surface that is easy on the drive belts prolonging belt life. Drive belt tensioning is simple: just loosen the tensioner pulley and adjust the tensioner bolt. The TDR tensioner is for power steering SC setups only.  If you have no power steering, you will need to purchase our TDR Power Steering Delete Bracket. (TDR-PSD).  If you have no power steering or A/C you will also need our TDR A/C Delete Pulley (TDR-ACD).


TDR Tensioner Compare
The TDR tensioner (left) offers over twice the range of adjustment travel as compared to the Moss tensioner (right).

NOTE: Photos shows TDR Tensioner with older version non-flanged steel pulleys. 

INSTRUCTIONS



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TDR Supercharger Belt Tensioner Power Steering Delete Bracket for 90-05 Miata
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This bracket allows use of the TDR Supercharger Belt Tensioner without Power Steering.
TDR Supercharger Belt Tensioner A/C Delete Pulley for 90-05 Miata
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Product Reviews

(7 Ratings, 2 Reviews) Average Rating:
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Great product
martin winte (Newland, NC) 2/21/2016 8:01 PM
This adjuster is wonderful. If you have a supercharged Miata you NEED this. All adjustment is manual, simple, and rock solid. Adjustment involve using 2 wrenches. Simple, effective, well built product.
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Belt Tensioner
Glenn Holden (Huntersville, NC) 11/11/2013 4:09 PM
I recently installed this tensioner on my '97 MX-5 with an MP-45 supercharger. What an improvement! I hate that I'd held off with the install until I had started a project that required removal of all of the belts. Adjust-ability, ease of adjustment, belt removal/installation, are all a piece of cake with this tensioner. Hands down this is one of the best upgrades available for a supercharged MX-5.

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