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SBC Connecting Rod Offset - Honda Rod Bearing Width

General engine tech -- Drag Racing to Circle Track

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Vintagewrench
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SBC Connecting Rod Offset - Honda Rod Bearing Width

Post by Vintagewrench » Wed Feb 05, 2020 12:58 pm

We need to know the amount of offset that SBC connecting rods have, and the width of an un-chamfered Clevite 1.889 Honda racing rod bearing. Have looked everywhere but both are hard to find.

Thanks in advance for any help you can offer.
The Old Motor
Prewar Racing Engine Rebuilding - Reproduction Engine Blocks, Heads, Crankcases - Custom-Made Bearings - Babbitting - Blind-Hole Cylinder Boring - Line boring - Connecting Rod Boring - theoldmotor.com/?page_id=29926

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Re: SBC Connecting Rod Offset - Honda Rod Bearing Width

Post by BillK » Wed Feb 05, 2020 1:41 pm

Vintagewrench wrote:
Wed Feb 05, 2020 12:58 pm
We need to know the amount of offset that SBC connecting rods have, and the width of an un-chamfered Clevite 1.889 Honda racing rod bearing. Have looked everywhere but both are hard to find.

Thanks in advance for any help you can offer.
I am pretty sure I am looking at the right one. CB1665HD .896 wide the narrowed version is .851 I might have time to check the offset on a rod later on.
Bill Koustenis
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Waldorf Md

www.enginerepairshop.com

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Re: SBC Connecting Rod Offset - Honda Rod Bearing Width

Post by ptuomov » Wed Feb 05, 2020 1:48 pm

Doesn’t the Mahle clevite bearing catalog pdf list the lengths of all their bearings?

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Re: SBC Connecting Rod Offset - Honda Rod Bearing Width

Post by Vintagewrench » Wed Feb 05, 2020 2:00 pm

BillK wrote:
Wed Feb 05, 2020 1:41 pm
Vintagewrench wrote:
Wed Feb 05, 2020 12:58 pm
We need to know the amount of offset that SBC connecting rods have, and the width of an un-chamfered Clevite 1.889 Honda racing rod bearing. Have looked everywhere but both are hard to find.

Thanks in advance for any help you can offer.
I am pretty sure I am looking at the right one. CB1665HD .896 wide the narrowed version is .851 I might have time to check the offset on a rod later on.
Bill,Thanks for taking the time to help, CB1665HD sounds like the right bearing part #.
The Old Motor
Prewar Racing Engine Rebuilding - Reproduction Engine Blocks, Heads, Crankcases - Custom-Made Bearings - Babbitting - Blind-Hole Cylinder Boring - Line boring - Connecting Rod Boring - theoldmotor.com/?page_id=29926

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Re: SBC Connecting Rod Offset - Honda Rod Bearing Width

Post by Vintagewrench » Wed Feb 05, 2020 2:02 pm

ptuomov wrote:
Wed Feb 05, 2020 1:48 pm
Doesn’t the Mahle clevite bearing catalog pdf list the lengths of all their bearings?


Thanks for the lead, it did check that PDF but maybe I missed that measurement.
The Old Motor
Prewar Racing Engine Rebuilding - Reproduction Engine Blocks, Heads, Crankcases - Custom-Made Bearings - Babbitting - Blind-Hole Cylinder Boring - Line boring - Connecting Rod Boring - theoldmotor.com/?page_id=29926

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Re: SBC Connecting Rod Offset - Honda Rod Bearing Width

Post by ptuomov » Wed Feb 05, 2020 2:18 pm

Vintagewrench wrote:
Wed Feb 05, 2020 2:02 pm
ptuomov wrote:
Wed Feb 05, 2020 1:48 pm
Doesn’t the Mahle clevite bearing catalog pdf list the lengths of all their bearings?


Thanks for the lead, it did check that PDF but maybe I missed that measurement.
https://www.mahle-aftermarket.com/media ... -40-16.pdf

Unless I misunderstood the original question, the answer is in the last column labeled "max length". For example, take a look at page 38.

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Re: SBC Connecting Rod Offset - Honda Rod Bearing Width

Post by BillK » Wed Feb 05, 2020 2:21 pm

ptuomov wrote:
Wed Feb 05, 2020 2:18 pm
Unless I misunderstood the original question, the answer is in the last column labeled "max length".
Correct :) Might be confusing if you dont do it all day long.
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Re: SBC Connecting Rod Offset - Honda Rod Bearing Width

Post by Vintagewrench » Wed Feb 05, 2020 2:34 pm

ptuomov wrote:
Wed Feb 05, 2020 2:18 pm
Vintagewrench wrote:
Wed Feb 05, 2020 2:02 pm
ptuomov wrote:
Wed Feb 05, 2020 1:48 pm
Doesn’t the Mahle clevite bearing catalog pdf list the lengths of all their bearings?


Thanks for the lead, it did check that PDF but maybe I missed that measurement.
https://www.mahle-aftermarket.com/media ... -40-16.pdf

Unless I misunderstood the original question, the answer is in the last column labeled "max length". For example, take a look at page 38.
Thanks again! My brain short circuited the last time I looked at the catalog and I see it clearly now.
The Old Motor
Prewar Racing Engine Rebuilding - Reproduction Engine Blocks, Heads, Crankcases - Custom-Made Bearings - Babbitting - Blind-Hole Cylinder Boring - Line boring - Connecting Rod Boring - theoldmotor.com/?page_id=29926

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Re: SBC Connecting Rod Offset - Honda Rod Bearing Width

Post by frnkeore » Wed Feb 05, 2020 5:34 pm

The offset on SBC is .063 but, that isn't from the CL of the rod. It's the amount that the "thick" side of the rod is wider than the narrow side.

In other words, if you take .063 off the thick side, the rod will be symmetrical about it's center line.

I modify SBC, 400 rods, to use in 302 Fords.

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Re: SBC Connecting Rod Offset - Honda Rod Bearing Width

Post by Kevin Johnson » Wed Feb 05, 2020 10:04 pm

Vintagewrench wrote:
Wed Feb 05, 2020 2:34 pm
ptuomov wrote:
Wed Feb 05, 2020 2:18 pm
Vintagewrench wrote:
Wed Feb 05, 2020 2:02 pm


Thanks for the lead, it did check that PDF but maybe I missed that measurement.
https://www.mahle-aftermarket.com/media ... -40-16.pdf

Unless I misunderstood the original question, the answer is in the last column labeled "max length". For example, take a look at page 38.
Thanks again! My brain short circuited the last time I looked at the catalog and I see it clearly now.
https://www.mehanika.ru/upload/iblock/9 ... 0111dc.pdf

The problem appears to be inconsistent terminology by bearing manufacturers. In some cases it is referred to as width and others length. In roller bearing dimensions the practices seem more consistent.

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Re: SBC Connecting Rod Offset - Honda Rod Bearing Width

Post by leahymtsps » Thu Feb 06, 2020 6:36 am

Personally I think CB1663H is the more common HRJ bearing and it's width is listed as
.792 and is unchamfered.

Tom

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Re: SBC Connecting Rod Offset - Honda Rod Bearing Width

Post by Vintagewrench » Thu Feb 06, 2020 12:20 pm

frnkeore wrote:
Wed Feb 05, 2020 5:34 pm
The offset on SBC is .063 but, that isn't from the CL of the rod. It's the amount that the "thick" side of the rod is wider than the narrow side.

In other words, if you take .063 off the thick side, the rod will be symmetrical about it's center line.

I modify SBC, 400 rods, to use in 302 Fords.
Thanks for the information!
The Old Motor
Prewar Racing Engine Rebuilding - Reproduction Engine Blocks, Heads, Crankcases - Custom-Made Bearings - Babbitting - Blind-Hole Cylinder Boring - Line boring - Connecting Rod Boring - theoldmotor.com/?page_id=29926

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Re: SBC Connecting Rod Offset - Honda Rod Bearing Width

Post by LSP » Sun Feb 09, 2020 2:47 pm

leahymtsps wrote:
Thu Feb 06, 2020 6:36 am
Personally I think CB1663H is the more common HRJ bearing and it's width is listed as
.792 and is unchamfered.

Tom
Yes

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