theone61636

I'm currently running a full 8 rib system on my TVS2300 with the heavy duty tensioner. I keep burning up my alternators and I'm fairly certain it's due to the tension as I never had this issue when i was using the supplied Maggie tensioner. Not sure what my options are at this point other than to lower boost (currently at 18psi) and go back to the Maggie tensioner.

Any help would be greatly appreciated.

forcd ind

iTrader: (7)

Are you over spinning the alt maybe-you should tension the belt when warm, they tend to tighten up after warming up.

The BallSS

iTrader: (9)

18 psi from a Maggie, what, it won't make any more lol?
Are you using stock alternators?
Might be worth it to look into one of those billet Mechman units.

dlandsvZ28

You need to determine the rpm of the pulley on the alternator. If it is spinning over 18000 rpm that might be the issue. Over spin the pulley and the bearings will heat up and coke on the shaft. Some reduce the speed of the alternator pulley by increasing it's circumference size. You can research bearing rpm but most bearings on a 17mm shaft won't have a maximum rpm exceeding 20 - 21000 rpm -check SKF.

If you have changed to the new and improved blower belt Gates RPM product line then it doesn't require nearly as much tension as the Gates green product line. You set tension of the Green belt tighter because it will stretch over time compared to the RPM line that Gates claims won't stretch because of its construction and materials used in the construction of the belt.

dw456post

Does the Alt just quit charging after a run or is the bearing burned?
I went thru 4 auto store (Chinese) alt's before I figured it out and got a factory unit.

dlandsvZ28

Here's the formula to calculate alt rpm.

https://www.powermastermotorsports.c...pulleys_a.html

The typical alternator pulley size is 2.1 - 2.3. LS1 crankshaft pulley size is 7.65. So if you are spinning the engine to 7 K you are more than likely over-spinning the alt pulley by even more than PowerMaster advises (20,000).

(7.65/2.3) X 6500 (engine rpm) = 21,619 alt pulley speed.