Harmonic Balancer for 327 vs 350? - Forums - Official C3 Vette Registry

SPONSOR AD

Support our Vendors! | Advertise Here

Topic: Harmonic Balancer for 327 vs 350?

in Forum: C3 Engines

Already a Member?
Login
Not yet a Member?
Register for Free!

Harmonic Balancer for 327 vs 350? (1/7)
10/4/09 8:09am

sulm68
Former Member
Send Private Message

Jacksonville, FL - USA

Vette(s):
1968 convertable 327 300hp All numbers matching, rally red with black interior. A/C, power windows, power brakes. Tremic 5speed

Joined: 8/28/2007
Posts: 44

Hi Guys,

Can anyone tell me if a stock type balancer for a 327 ci base engine is different than a 350ci base engine. I bought a new balancer and the timing at TDC is off 5 degrees. The supply house says it should be right for my car but as far as I can tell its not.

Quote

Our Sponsors help support C3VR

Harmonic Balancer for 327 vs 350? (2/7)
10/4/09 8:43am

lukesvette

Lifetime Member
Send Private Message

HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6812

You could use it and adjust your timing readings to compensate for the builtin 5 degrees on the balancer. For example, if your engine calls for timing at 4 degrees BTDC, I would time it to 9 BTDC to getthe 4 degrees on the motor...

Quote

Harmonic Balancer for 327 vs 350? (3/7)
10/4/09 11:25am

JimmyV69

Lifetime Member
Send Private Message

Charlotte, NC - USA

Vette(s):
1969 Custom Modified, Hooker Header Side Pipes, 12 to 1 compression ratio, 355 CID,4 speed close ratio with hurst shifter, 370 rear, Recaro interior, Tilt hood, Hugger Orange and Black.

Joined: 2/4/2008
Posts: 83

They should be the same between a 327 and 350. Are you sure the outter ring on your old balancer has not slipped with age? Yhis had been the case with a couple of my older engines - just a thought.

Quote

Harmonic Balancer for 327 vs 350? (4/7)
10/5/09 9:38pm

I checked top dead center while the engine was pulled out of the car. The old balancer was dead on but I'm replacing it because its leaking and the rubber looks worn out.

Quote

Harmonic Balancer for 327 vs 350? (5/7)
10/30/09 7:20am

I guess the new balancer was incorrectly indexed? Confused

or when I was checking the old one I was doing something wrong.

Quote

Harmonic Balancer for 327 vs 350? (6/7)
10/30/09 7:55am

Adams' Apple

Lifetime Member
Moderator
Send Private Message

Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 20128

Are the two balancers the same diameter? (silly question, I know, but...)
Are they the same thickness, and same basic configuration?
If they are the same, dimensionally, the newer balancer may be improperly assembled, or it may be designed for an engine with the timing pointer in a different location.

______________

Joel Adams
C3VR Lifetime Member #56
My Link

(click for Texas-sized view!) NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Quote

Harmonic Balancer for 327 vs 350? (7/7)
11/2/09 12:41pm

VetteSpecialties
Former Member
Send Private Message

Mounds View, MN - USA

Vette(s):
70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe

Joined: 5/24/2007
Posts: 1031

Different years of small blocks had the timing pointers in different locations, so you probably just got a balancer that was not compatible with your pointer.

Larry

Quote

Our Sponsors help support C3VR