1955-85 Small Block Chevy Balancing Plate
1955-85 Small Block Chevy Balancing Plate
Speedway Motors

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#91615375

1955-85 Small Block Chevy Balancing Plate

  • Bolt-on balancing plate lets you balance your Small Block Chevy 400 or 383 with a 350 flywheel or flex plate
  • Allows use of lighter 350 flywheel to rev quicker
  • Precision stamped steel
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$24.99

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Product Summary

.110" Overall Thickness, Steel, Natural

  • Bolt-on balancing plate lets you balance your Small Block Chevy 400 or 383 with a 350 flywheel or flex plate
  • Allows use of lighter 350 flywheel to rev quicker
  • Precision stamped steel
  • Commonly used for 383
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Key Specs

MFG. Part #91615375
BrandSpeedway Motors
Overall Thickness.110"
Material TypeSteel
FinishNatural
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Speedway Motors 91615375 Details

When running a 383 or 400 S/B Chevy with a 153 tooth flexplate or flywheel, you need to have a balancing plate. These fit between the crankshaft and flexplate and correctly balance the engine without resorting to a big heavy flywheel.

Lets you balance your Small Block Chevy 400 or 383 with a 350 flywheel (manual transmission flywheel or automatic transmission flex plate) and a bolt-on balancing plate. Road and race tested. Allows use of lighter 350 flywheel to rev quicker. Precision stamped steel.

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Speedway Motors 91615375 Specifications

KEY SPECS
MFG. Part #91615375
BrandSpeedway Motors
Overall Thickness.110"
Material TypeSteel
FinishNatural
GENERAL
Sold in QuantityEach
NotesFits 1955-1985 SBC with a 2 piece rear main seal.

Ratings & Reviews

4.7

19 Reviews

Overall Assessment

Our product has been praised for its quality, practicality, & usability, and for specific features such as easy installation and correct balancing. It's an excellent alternative to buying a new flywheel, saving customers a significant amount of money. Customers have noted its effectiveness for various motor projects, and its compatibility with tests for vibration. They've used it successfully without having to purchase a new flywheel, and have valued it for resolving transmission issues. Some minor modifications were required by a few users, but overall the product is considered to be of high quality and great value.

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4.7

19 reviews

5

15

4

2

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Most Liked Positive Review

5.0

Excellent product!

Quickly replaces the hard to find SBC flywheel and balances the engine. The balancing plate is very easy to install correctly, especially with the available bolt kit. Without this balancing plate or 400 flywheel my engine vibrated the whole car at approximately 2000 RPM to the extent I am confident total engine failure would have occurred at very low mileage. Great product for actual car builders!

Most Liked Negative Review

3.0

Excellent product but you may have to modify slightly

I found the angles at the outside edge interfered with the shoulder on the flywheel but by grinding the angles into a smooth radius the plate was able to fit flush against the back of the flywheel.

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Definitely liked the product

5.0

2 years ago

Gunk

Lisle,Il

Verified

Worked for a 383 project

Would Recommend

Incompatible with T56

3.0

3 years ago

Caleb

Dallas, TX

Installed with fidanza 198661 conversion flywheel and stock t56 clutch. Clutch fork was hitting the clutch when engaged.

Product worked well

5.0

3 years ago

Deacrider

Missouri

Verified

Clearly marked for correct install. Motor was very smooth after install

Would Recommend

Quick fix for standard flexplate on 400 SBC

4.0

4 years ago

Edwin L

Bradford Ohio

Verified

See above

Would Recommend

Great alternative to buying a new flywheel.

5.0

4 years ago

Dave Dirtracer

Southaven MS

Verified

I'm using this with my 153 tooth internally balanced 350 flywheel instead of buying a new flywheel for my 383 saving me around 300 dollars.

Would Recommend

Yes I would buy these parts again

5.0

5 years ago

Reuben

Elberta Al

Verified

This plate helps when balancing the rotating assembly.

Would Recommend

I would buy it agene

5.0

5 years ago

Duffie

Forest City NC

Verified

I used it on a new race motor

Would Recommend

Customer review image

Balance Plate

5.0

5 years ago

james713

Seattle

Verified

Fit well and did the job.

Would Recommend

Excellent product but you may have to modify slightly

3.0

6 years ago

AV8R

Canada

Verified

I found the angles at the outside edge interfered with the shoulder on the flywheel but by grinding the angles into a smooth radius the plate was able to fit flush against the back of the flywheel.

Would Recommend

Worked well

4.0

7 years ago

Will

Alberta

Verified

Fit well just what I needed stopped my vibration.

Would Recommend

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Questions & Answers

13 Questions • 12 Answers

Due to the flywheel being moved rearward .110" after installing this plate, will the starter still engage the flywheel teeth properly?

by Grinding teeth

• 7 years ago

1 answer

View Answer

I am replacing a 400 CI small block with a 383 stroker. Trans is a TH350, 2000 stall. I rebuilt the trans and will be installing the 383 stroker soon. The 383 has an Eagle internally balanced rotating assembly. Do I need the balance plate and what flexplate do I need. Bolt pattern measures 11" on the old torque converter. 2 piece main.

by Jamie

• 7 years ago

3 answers

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I'm putting a 383 in my truck. It has 350 in it now with a flywheel. Will this work so I can put my flywheel on my 383? The 383 has a 400 crank in it.

by Andrew

• 8 years ago

1 answer

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will this work on 168 tooth 350 flywheel

by tom

• 10 years ago

1 answer

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Do i need to use it with a manulal trans in a 85 firebird using a stock fly wheel? had a 305.

by me

• 10 years ago

1 answer

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Can you us this on a racing motor that used the 400 flexplate that is external balance I need to use a 153 flexplate with my Bert bell housing it's a 55-85 sbc motor

by dj

• 10 years ago

1 answer

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My flex plate is dished where the balancing plate will bolt. Do I just put it on anyway and torque it down?

by KORacing

• 10 years ago

1 answer

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I have an auto trans, and want to change to 4 speed do I need to rebalance engine, or can I change flywheel and add plate and go?

by Bro-b

• 11 years ago

1 answer

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do i need to balance with plate? or can i change flywheel and put on plate? thanks Dave

by Bro-B

• 11 years ago

1 answer

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Is there a front or back on the way it rotates?? Its a centric so I'm guessing there is a reason for that....

by 51-chevy-racing

• 11 years ago

1 answer

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