We have developed our Adjustable Tension Alternator Bracket kit for use on 79-91 12A & 13B engines. The purpose is to allow users to achieve the correct level of belt deflection. The spec is:

New Belt: 12-15mm @ 10kg
Used Belt: 14-17mm @ 10kg

We find that most owners simply put a pry bar under the alternator and hope they achieve the proper level of tension. This was the technique that was used for most cars up unto the 90's when Mazda incorporated an adjustable tensioner on the FD and Cosmo.

For years we have had engines come in to the shop with aggressive front/rear stationary gear bearing wear. One of the main causes of this wear is over-tightened belts. When the alternator belt is too tight it actually pulls on the e-shaft leading to excessive wear on one side on the bearings. Below is a pic of excessive front stationary gear bearing wear.

Having proper belt tension also reduces waterpump and alternator bearing failures, as well as increasing belt life.

We have even seen a few cracked water pump housings at the alternator pivot point from extremely over-zealous owners.

Our Adjustable Tension Alternator Bracket is fabricated from 3/16" laser cut, it is then Powder Coated Black to prevent corrosion. The kit comes with stainless steel hardware.

 

New Adjustable Tension Bracket:









Product can be purchased on our site: http://banzai-racing.com/store/86-91...lley_belt.html

The threaded hole on the alternator does need to be drilled out for the adjuster to be installed. If you have already installed an FD alternator there is no modification required.

 

Finally someone makes it....

You have just made my day and I just ordered two.

 

We will get these shipped out to you tomorrow

 

Great stuff!

 

Nice, will have to order one as well.

 

If I am putting this on an FC that is using an FD Alternator and serpentine belt conversion, are there any special provisions that must be made?

 

Should not have any problems, it is actually little less work since the hole is already drilled for the adjuster on the FD alternator.

 

Perfect I'll be placing my order shortly!

 

We have another 50 bracket kits ready to go

 

This is awesome, and surprisingly cheap. Just ordered one

 

We are trying to keep these as affordable as possible.

 

Ordered 2

 

Adjustable Tension Alternator Bracket kit for use on 79-91 12A & 13B engines. The purpose is to allow users to achieve the correct level of belt deflection.

For years we have had engines come in to the shop with aggressive front/rear stationary gear bearing wear. One of the main causes of this wear is over-tightened belts. When the alternator belt is too tight it actually pulls on the e-shaft leading to excessive wear on one side on the bearings.

Having proper belt tension also reduces waterpump and alternator bearing failures, as well as increasing belt life.

Our Adjustable Tension Alternator Bracket is fabricated from 3/16" laser cut steel, it is then Powder Coated Black to prevent corrosion. The kit comes with stainless steel hardware.

Please read and follow instructions carefully to ensure correct installation

Tools Required

* Ratchet
* 12mm, 13mm & 14mm Sockets and/or wrenches
* Drill with 5/16" bit (ONLY for FC Alternator)




Procedure

1. If removing alternator from the car disconnect the battery.
2. Using 14mm and 12mm tools loosen and remove alternator and factory bracket
3. On an FC alternator, drill out the threaded hole using a 5/16" drill bit identified in pic #1.
4. Attach new bracket to alternator as pictured in #2 & #3
5. Reinstall alternator.
6. Adjust tension; the deflection spec:
* New Belt: 12-15mm @ 10kg
* Used Belt: 14-17mm @ 10kg

2013 MERCEDES BENZ SL-CLASS

 

That would be from our installation instructions posted on our website. Alternator Bracket Kit Installation Instaructions

 

Do you have a picture of your Adjustable tension alternator bracket installed in a FB? I am concerned about it clearing the Dizzy.

 

Are you and Banzai Toyota the same vendor?

 

Here is a customer that painted theirs silver, clears the dizzy without issue





We are not Banzai Toyota

 

Wow these are amazing, I am bookmarking this with my bump for later.
BUMP