balencer Size....please help
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Joined: Sep 2003
Posts: 119
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From: Arlington, Tx
Car: 89 Firebird Formula 350 WS6
Engine: 350
Transmission: 700R4
balencer Size....please help
i have an 89' Firebird Formula 350 WS6. Was looking to order a new balencer but don't know the size and if it is extranally or internally balenced. Let me know. Thanks
Supreme Member
Joined: Apr 2002
Posts: 3,552
Likes: 5
From: New Jersey
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
6 and 3/4ths or 8".. I've seen both on these cars stock.. not sure which one for which years though.. or if it makes a difference.. maybe someone else knows for sure.. AFAIK any neutrally balanced one should be fine.
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Joined: Dec 2003
Posts: 539
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From: Newberry, Mi
Car: transam, el camino
Engine: 415
Transmission: T56
You can use any size, the larger like 8" will work better (reduce the bad vibes) the down side is they usually weight more. A smaller, lighter one will let the engine rev faster. can't you just bust out a tape measure on your existing damper/harmonic balancer?
Supreme Member
Joined: Jul 1999
Posts: 2,149
Likes: 4
From: Mims, Florida
Car: '87 IROCZ
Engine: 395 ZZ4
Transmission: ProBuilt 700R4
Axle/Gears: 9 bolt 3.70s
Thats what I did. My stock bottom end 350 is sitting on the floor. A new 395 will be going in. I measured that factory damper with a tape,,, 6 3/4" dia. And I know that these engines are internally balanced.
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Sep 13, 2004 06:43 AM