Need mild 1.550" OD single springs and retainers.

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PackardV8
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Need mild 1.550" OD single springs and retainers.

Post by PackardV8 » Wed Oct 10, 2018 2:06 pm

Building Packard V8s. We're needing an affordable spring and retainer package. The OEM springs are NLA. I've modified early Cad OHV8 springs and retainers, which are now also NLA. So we need 1.550" OD springs and retainers for .375" stem valves; 100# seat pressure @ 1.75" is fine.

Most of the 1.550" OD springs in the catalogs are part of race-heavy dual spring packages. Any idea which other engines might come with 1.550" OD springs as OEM? Who offers low seat pressure aftermarket single springs and retainer packages?

All ideas and leads appreciated.
Jack Vines
Studebaker-Packard V8 Limited
Obsolete Engineering

mag2555
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Re: Need mild 1.550" OD single springs and retainers.

Post by mag2555 » Wed Oct 10, 2018 2:38 pm

What is the smallest ID for a spring you could use?

PackardV8
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Re: Need mild 1.550" OD single springs and retainers.

Post by PackardV8 » Wed Oct 10, 2018 3:04 pm

mag2555 wrote:
Wed Oct 10, 2018 2:38 pm
What is the smallest ID for a spring you could use?
The OEM ID is 1.170", but if everything else were right, we could machine the guide boss OD to fit.
Jack Vines
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Obsolete Engineering

DJ58
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Re: Need mild 1.550" OD single springs and retainers.

Post by DJ58 » Wed Oct 10, 2018 4:06 pm

Found a couple of SBI part numbers that might work for you.
160-1424 1.547 O.D. 73@1.752 lbs
160-1089 1.500 O.D. 80@1.800 lbs

hope this might help :D


Dan
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Re: Need mild 1.550" OD single springs and retainers.

Post by Kbails » Wed Oct 10, 2018 6:17 pm

try lunati 73126-16 might work for you
Long Island, NY

GARY C
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Re: Need mild 1.550" OD single springs and retainers.

Post by GARY C » Wed Oct 10, 2018 11:09 pm

Why not use an under spring ID locator with smaller lighter spring and retainer?
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Re: Need mild 1.550" OD single springs and retainers.

Post by jred » Thu Oct 11, 2018 12:56 am

check in the pioneer catalog i found all kinds of springs in there just located some springs for a very early corvair and was really surprised at how many different sizes they listed,,

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Re: Need mild 1.550" OD single springs and retainers.

Post by travis » Thu Oct 11, 2018 1:53 am

What about something like this? It would open up a LOT of spring options.

https://www.summitracing.com/parts/cro-68930-16

https://www.summitracing.com/parts/cro-68934-16

https://www.summitracing.com/parts/cro-68951-16

I’m not sure what locator ID you would need, but something like this might work

Geoff2
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Re: Need mild 1.550" OD single springs and retainers.

Post by Geoff2 » Thu Oct 11, 2018 4:34 am

You could check 383/440 Mopar. Maybe a single spring with damper will get the job done.

PRH
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Re: Need mild 1.550" OD single springs and retainers.

Post by PRH » Thu Oct 11, 2018 10:31 am

Load wise, a Comp 942 would probably work for you, but you’ll likely have to machine the spring pad.
Somewhat handy with a die grinder.

PackardV8
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Re: Need mild 1.550" OD single springs and retainers.

Post by PackardV8 » Thu Oct 11, 2018 11:21 am

garyc wrote:Why not use an under spring ID locator with smaller lighter spring and retainer?
travis wrote:
Thu Oct 11, 2018 1:53 am
What about something like this? It would open up a LOT of spring options. I’m not sure what locator ID you would need, but something like this might work.
The Packard V8 uses an integral guide with a 1.170" boss at the base to locate the spring. It could be machined to take a smaller locator, but that adds labor and materials. That's the last option if a drop in spring can't be found.
Jack Vines
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Obsolete Engineering

GARY C
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Re: Need mild 1.550" OD single springs and retainers.

Post by GARY C » Thu Oct 11, 2018 1:47 pm

PackardV8 wrote:
Thu Oct 11, 2018 11:21 am
garyc wrote:Why not use an under spring ID locator with smaller lighter spring and retainer?
travis wrote:
Thu Oct 11, 2018 1:53 am
What about something like this? It would open up a LOT of spring options. I’m not sure what locator ID you would need, but something like this might work.
The Packard V8 uses an integral guide with a 1.170" boss at the base to locate the spring. It could be machined to take a smaller locator, but that adds labor and materials. That's the last option if a drop in spring can't be found.
Cool.
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THE ABOVE POST IN NO WAY REFLECTS THE VIEWS OF SPEED TALK OR IT'S MEMBER AND SHOULD BE VIEWED AS ENTERTAINMENT ONLY...Thanks, The Management!

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Re: Need mild 1.550" OD single springs and retainers.

Post by travis » Thu Oct 11, 2018 9:50 pm

Looking through an old Federal-Mogul catalog, I see that using the outer spring of the VS1321 dual spring package would be almost perfect. The outer spring is 1.55” OD, 1.170” ID, 125#’s at 1.700” installed height, 286# spring rate which off the top of my head would be about 110# at 1.750”.

Not sure if it still available though. A quick search online comes up empty so far

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Re: Need mild 1.550" OD single springs and retainers.

Post by rustbucket79 » Thu Oct 11, 2018 10:20 pm

BBD factory replacement six pack springs

Keith Morganstein
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Re: Need mild 1.550" OD single springs and retainers.

Post by Keith Morganstein » Fri Oct 12, 2018 5:07 am

PackardV8 wrote:
Wed Oct 10, 2018 2:06 pm
Building Packard V8s. We're needing an affordable spring and retainer package. The OEM springs are NLA. I've modified early Cad OHV8 springs and retainers, which are now also NLA. So we need 1.550" OD springs and retainers for .375" stem valves; 100# seat pressure @ 1.75" is fine.

Most of the 1.550" OD springs in the catalogs are part of race-heavy dual spring packages. Any idea which other engines might come with 1.550" OD springs as OEM? Who offers low seat pressure aftermarket single springs and retainer packages?

All ideas and leads appreciated.
Jack do you have an SBI catalog? (Paper catalog is best). In the back are springs by OD. Then you can check the specs by the number. Happy hunting!
Automotive Machining, cylinder head rebuilding, engine building. Can't seem to quit #-o

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