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Old 09-25-2008, 06:51 PM
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Jhans pistons ?

Does anybody out there know anything about this brand ? Jhans pistons.
Just got one set (cheap) for my sbc 327. But i don't find anything about them.
Regards. Kristofer.

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Old 09-25-2008, 06:56 PM
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Very good pistons!!!
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Old 09-25-2008, 07:08 PM
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Never saw any Jhans ... pistons .. but his cousin Jahns made some pretty good stuff
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Old 09-25-2008, 07:10 PM
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Quote:
Originally Posted by Deuce
Never saw any Jhans ... pistons .. but his cousin Jahns made some pretty good stuff

You're soooo bad!!! LOL

Mark
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Old 09-25-2008, 07:32 PM
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Most Jahns are heavy, old-technology pistons. They have been out of business for many years. They'll work if you don't turn the engine too tight and stretch the rods. How much do yours weigh? Are they flattop or dome? They are OK for a nostalgia build, but don't compete with the best of today's technology pistons.

thnx, jack vines
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Old 09-25-2008, 08:21 PM
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I tend to agree with Packard we were using them back in the 60's .....for the day they weren't bad but there was usually a pretty big variance in weight between pistons. For a mild street motor that will be kept in a reasonable RPM range they should do fine.

That being said I am running a set of Jahns in the 55 Chrysler HEMI I just built.

Last edited by 1957plymouthhemi; 09-26-2008 at 06:24 AM.
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Old 09-25-2008, 09:29 PM
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If they are Jahns forged pistons they will want .007 to .0075 p to W clearance and sound louder with the piston slap at low engine speeds.

Jahns was and still are in business but are a specialty business now 120 a piston for current stuff.
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Old 09-26-2008, 12:56 AM
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Jahns pistons.

The only Jahns pistons I've ever seen were cast; not saying they did'nt make forged, just never seen any. Yes, old technolgy and heavy, and SBC pistons aways had an unusual dome. Full skirting aways made them look like they were meant for an old flathead Ford. They were the "big" brand to have back in the "301" SBC days. They had a nice decal also.
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Old 09-27-2008, 09:35 PM
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Quote:
Originally Posted by junior stocker
The only Jahns pistons I've ever seen were cast; not saying they did'nt make forged, just never seen any. Yes, old technolgy and heavy, and SBC pistons aways had an unusual dome. Full skirting aways made them look like they were meant for an old flathead Ford. They were the "big" brand to have back in the "301" SBC days. They had a nice decal also.

I only remember them as cast too.
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Old 09-27-2008, 10:52 PM
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The last ones I had custom made was in 84, and they came in ONE POUND heavier than stock..... EACH piston....... ONE FULL POUND heavier.... what is that? 450 grams??? each.

I sent them back and they trimmed them down to only 3 1/2 OUNCES heavier than stock.

That was $300 for a set of 8 ashtrays........
I still feel the pain when I sit down.

Last edited by ScoTFrenzel; 09-27-2008 at 10:58 PM.
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