Are 305 and 350 Harmonic balancers the same?
02-01-2012, 08:08 PM
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Car: 88Fbird,88Formula,04 GP,04 Durango
Engine: LO3,L98,3800,HEMI
Transmission: 700r4, 4l60e, 545rfe
Are 305 and 350 Harmonic balancers the same?
I looked it up, but I am finding conflicting information. I want to use my balancer from my old LO3 on my L98. I think the one on my 350 has spun.
02-01-2012, 11:07 PM
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Car: 1984 Z28 Hardtop
Engine: 383 Carb
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Axle/Gears: 3.54 Dana 44
Re: Are 305 and 350 Harmonic balancers the same?
You can interchange them as long as the diameters are the same.
02-02-2012, 07:00 AM
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Car: 88Fbird,88Formula,04 GP,04 Durango
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Re: Are 305 and 350 Harmonic balancers the same?
Ok thanks.
02-02-2012, 09:12 AM
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Are 305 and 350 Harmonic balancers the same?
TBI and TPI are a lil different.
The timing mark placement is more strait up on TBIs (1 O'clockish)
TPIs are 2-3 O-clock..
Thickness of the balancers TBIs are thicker towards the timing cover than TPIs are.
I think the truck (maybe fullsize car) TBI balancers are bigger also
The timing mark placement is more strait up on TBIs (1 O'clockish)
TPIs are 2-3 O-clock..
Thickness of the balancers TBIs are thicker towards the timing cover than TPIs are.
I think the truck (maybe fullsize car) TBI balancers are bigger also
Last edited by TTOP350; 02-02-2012 at 09:25 AM.
02-02-2012, 10:48 AM
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Car: 88Fbird,88Formula,04 GP,04 Durango
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Re: Are 305 and 350 Harmonic balancers the same?
Could I use a 350 from the mid 90's. I'm looking around craigslist for a cheap engine. I found one from a 94 silverado, and another one from a 93 Chevy. It didn't specify what vehicle. Of course I still run the risk of getting another bad balancer I guess.
02-02-2012, 11:11 AM
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Car: 1984 Z28 Hardtop
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Re: Are 305 and 350 Harmonic balancers the same?
You can use a balancer from any SBC except a 400, as long as the diameters are the same to clear your timing comb. Put your own TDC mark on if they're not in the same spots.
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02-02-2012, 11:21 PM
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Car: 1984 Z28 Hardtop
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Re: Are 305 and 350 Harmonic balancers the same?
One-piece RMS, but what does that have to do with his balancer?
02-02-2012, 11:28 PM
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Car: 86 Camaro, IROC springs & bars
Engine: Mild 350,Q-jet,headers
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Axle/Gears: 98 7.5, 3.73 torsen.
Re: Are 305 and 350 Harmonic balancers the same?
13Mgoff, after 86 or so all use a single rear seal, center bolt valve covers with a machined gasket surface, Chevy finally did something to try to stop the oil leak problems they had sense 55.
The trucks didn't get the roller cam for a couple more years. OOPS, startin to ramble again, hope I helped.
The trucks didn't get the roller cam for a couple more years. OOPS, startin to ramble again, hope I helped.
02-02-2012, 11:31 PM
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Car: 1984 Z28 Hardtop
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Re: Are 305 and 350 Harmonic balancers the same?
Next time please do.
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