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[email protected] Samba Member
Joined: June 24, 2015 Posts: 719 Location: Rialto. CA
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Posted: Thu Jun 03, 2021 3:17 pm Post subject: Hirth roller crankshaft |
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There a guys who wants to sell me a hirth roller crankshaft im looking to buy it.....i know folks ain't a fan of them because of this and that but I was wondering if anyone had tried to have custom plain bearings instead of roller bearings and what are your guys thoughts wouldn't the pain bearings help these crankshafts ???? |
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Starbucket Samba Member
Joined: April 30, 2007 Posts: 4025 Location: WA
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Posted: Sat Jun 05, 2021 3:04 pm Post subject: Re: Hirth roller crankshaft |
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Do you know how much a custom set of babbitt bearings would cost? Over $5000.00 if you could find someone willing to do it. If you want plain bearing crank use a normal crankshaft If you want a roller crank buy it and use as designed Racing not puttering around town. |
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Glenn Mr. 010
Joined: December 25, 2001 Posts: 76938 Location: Sneaking up behind you
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Posted: Sat Jun 05, 2021 3:46 pm Post subject: Re: Hirth roller crankshaft |
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What's the original application?
If its for a Porsche Type 547/1 it's worth more than your cars. _________________ Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare |
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[email protected] Samba Member
Joined: June 24, 2015 Posts: 719 Location: Rialto. CA
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Posted: Sat Jun 05, 2021 4:25 pm Post subject: Re: Hirth roller crankshaft |
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Glenn wrote: |
What's the original application?
If its for a Porsche Type 547/1 it's worth more than your cars. |
I have no porsche just vws ...I like 36hp performance stuff but I like to get 356 info on their parts and what ideas are good or not ... |
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RolandD Samba Member
Joined: January 15, 2017 Posts: 247 Location: Menomonee Falls, Wis
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Posted: Sat Jun 05, 2021 7:27 pm Post subject: Re: Hirth roller crankshaft |
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Be aware that there where roller cranks available for 40 hp and 1600 VW engine, They had 1 piece rods and used standard main bearings. I have 64 mm and 69 mm versions. SPG might have been the brand???
Roland |
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[email protected] Samba Member
Joined: June 24, 2015 Posts: 719 Location: Rialto. CA
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Posted: Sat Jun 05, 2021 7:43 pm Post subject: Re: Hirth roller crankshaft |
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RolandD wrote: |
Be aware that there where roller cranks available for 40 hp and 1600 VW engine, They had 1 piece rods and used standard main bearings. I have 64 mm and 69 mm versions. SPG might have been the brand???
Roland |
Yes spg were pressed together and twisted easily compare to the hirth rollercrank. spg also made some for the vw 36hp engine but are rare .afriend of mine bought a 356 engine tore it down and it also had a spg roller crank in it ....I was just wondering if plain bearing would help the hirth roller crank instead of rollers bearings on the rods ....maybe no one thought about it ...I know it would be much cheaper to throw in a regular crank but it was just a question and a thought in my brain "what if " lol I guess I'm bored in life at the moment 😅 |
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RolandD Samba Member
Joined: January 15, 2017 Posts: 247 Location: Menomonee Falls, Wis
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Posted: Mon Jun 07, 2021 7:16 pm Post subject: Re: Hirth roller crankshaft |
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Call me stupid, but on the SPG, the rods are one piece. You would have to press apart, and then the journal sizes are still unknown???
Roland |
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badsix Samba Member
Joined: November 22, 2007 Posts: 228 Location: coos bay or.
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Posted: Fri Jul 16, 2021 10:17 pm Post subject: Re: Hirth roller crankshaft |
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i saw a real neat looking lamp made out of roller crank. the crank stood upright with a porsche shade on it, impressive at the least.
Jay D. |
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janerick3 Samba Member
Joined: June 04, 2006 Posts: 1879 Location: Colorado
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Posted: Sat Jul 17, 2021 9:39 am Post subject: Re: Hirth roller crankshaft |
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The unreliability of roller cranks is a good reason for not installing one and ending up trashing an engine.
Wonder why early 356 Super engines are so rare today??? _________________ Thanks,
Jan K. |
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Starbucket Samba Member
Joined: April 30, 2007 Posts: 4025 Location: WA
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Posted: Sat Jul 17, 2021 3:15 pm Post subject: Re: Hirth roller crankshaft |
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Same reason the cars are now. The roller crank was designed for racing not for tooling around town. |
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bill brown Samba Member
Joined: August 16, 2000 Posts: 37 Location: Lincoln NE
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Posted: Fri Aug 13, 2021 12:31 pm Post subject: Re: Hirth roller crankshaft |
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No way a roller crank can be converted to plain bearings! |
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