harmonic balancer Stock size
06-20-2014, 04:35 PM
#1
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Car: 1991 Z-28
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 3.73
harmonic balancer Stock size
Hey Folks...what is the size of a stock harmonic balancer on a 91 305 TPI? Was on summit and see them anywhere from 6 to 8. I'm not sure how to measure it, the ID is about 7 inches and OD in almost 8 inches.
What to keep it stock size!
Tks Troy
What to keep it stock size!
Tks Troy
06-20-2014, 05:49 PM
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Car: 1991 Z-28
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 3.73
Re: harmonic balancer Stock size
Tried to take a sensible pic..looks like 7" on the ID and 8 on the OD"
http://postimg.org/image/ctjjpg2kj/
http://postimg.org/image/c5ap6i3ur/
http://postimg.org/image/ctjjpg2kj/
http://postimg.org/image/c5ap6i3ur/
06-20-2014, 06:22 PM
#4
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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: harmonic balancer Stock size
EDIT: that's the crank pulley you are measuring in the pix
TPI cars should have the smaller balancer, sounds like you have a truck or big car balancer on there. That means the timing cover has been modded or is wrong.
Maybe the motor is from a big car or truck?
TPI cars should have the smaller balancer, sounds like you have a truck or big car balancer on there. That means the timing cover has been modded or is wrong.
Maybe the motor is from a big car or truck?
06-20-2014, 06:55 PM
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Car: 1991 Z-28
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 3.73
Re: harmonic balancer Stock size
Hahaha yes it is the crank pulley! It is a stock motor...I needed to order the timing tab actually and was wondering the size of the stock H.B. as the timing tabs come in all different sizes in relation to H.B. sizes.
06-20-2014, 06:59 PM
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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: harmonic balancer Stock size
The TPI timing tab is welded on and is in about the 2 or 3 o
clock. (please correct if wrong)
the balancer is 6 and ?
clock. (please correct if wrong)
the balancer is 6 and ?
Last edited by TTOP350; 06-20-2014 at 07:46 PM.
06-20-2014, 07:11 PM
#7
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Car: 1991 Z-28
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 3.73
Re: harmonic balancer Stock size
Yep it is a part of the timing cover, but its gone on mine. I had the block changed back in the early 90's as a warranty replacement after a cylinder wall failed. Just did the Edelbrock Hi flow baseplate and runner upgrade and got no timing marks to set up by.
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06-20-2014, 07:41 PM
#8
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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: harmonic balancer Stock size
Pull out the number 1 plug and you can find TDC with a piston stop.
Use the balancer to mark the timing cover to get you close.
Or bolt on some cheesy chrome
http://www.summitracing.com/parts/mi...FTMiMgodYBAAQQ
Use the balancer to mark the timing cover to get you close.
Or bolt on some cheesy chrome
http://www.summitracing.com/parts/mi...FTMiMgodYBAAQQ
06-20-2014, 07:58 PM
#9
06-20-2014, 08:02 PM
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Car: 1991 Z-28
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 3.73
Re: harmonic balancer Stock size
OK some good info! Tks all!! I have hauled this from other posts:
The one with 8" balancer is TDC just past 12 o 'clock.
The TPI with 6 3/4" balancer is nearer 1 o'clock .
The one with 8" balancer is TDC just past 12 o 'clock.
The TPI with 6 3/4" balancer is nearer 1 o'clock .
06-20-2014, 09:09 PM
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Car: 1991 Z-28
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 3.73
Re: harmonic balancer Stock size
Yes, from what I understand, digging deeper and learning more, is that TPI is more to the 1:30 position as you would never get a timing gun from the 12:00 position. sound right?
06-20-2014, 09:15 PM
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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: harmonic balancer Stock size
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