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DANP85
Samba Member
Joined: July 26, 2020
Posts: 51
Location: Australia
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 Posted: Fri May 28, 2021 6:10 am Post subject: 36hp Counterweight Crank |
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| I have a stock stroke original VW crank with welded on counterweights and lightened flywheel from Jose at DPR stored away for a future project. Knowing stock 36hp cranks can break when revved, what I want to know is how strong are they when they’re beefed up like my particular one. How far can they be pushed? Many thanks in advance! |
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[email protected]
Samba Member
Joined: June 24, 2015
Posts: 719
Location: Rialto. CA
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| Posted: Sat May 29, 2021 8:20 pm Post subject: Re: 36hp Counterweight Crank |
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| DANP85 wrote: |
| I have a stock stroke original VW crank with welded on counterweights and lightened flywheel from Jose at DPR stored away for a future project. Knowing stock 36hp cranks can break when revved, what I want to know is how strong are they when they’re beefed up like my particular one. How far can they be pushed? Many thanks in advance! |
Not all 36hp cranks will brake if dpr had its hands on it it should be fine he inspects his cranks / job ....only cranks that brake are do to owners not changing oil or little oil and over revving ...another thing is that the early kdf /early 25hp cranks were cast not forged those are the ones that you should be aware of breakage.... and over the years when engines get stripped and piles of parts start and than the seller sells them as 36hp cranks mixes parts and than the new owner adds it to his engine and brakes and than the stories start about 36hp cranks brake. im not saying a 36hp cant brake everything can brake ...but you should be fine if you still fill iffy buy a 69mm crank and send me your crank for free lol jk 🤪 |
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esde
Samba Member
Joined: October 20, 2007
Posts: 5966
Location: central rust belt
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| Posted: Sun May 30, 2021 10:25 am Post subject: Re: 36hp Counterweight Crank |
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I have had DPR make me the same crankshaft. After asking some people [with more 36hp experience than me] , it was recommended that the next improvements be upgrading the stock pod bolts and oil system. I have a set of balanced stock rods with ARP bolts, and have fitted a 26mm pump with grooved main bearings. But, I am still at the mock up/ short block stage, so no real world experience to share.
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modok wrote:
Bent cranks are silent but gather no moss. I mean, ah, something like that. |
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[email protected]
Samba Member
Joined: June 24, 2015
Posts: 719
Location: Rialto. CA
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| Posted: Sun May 30, 2021 10:32 am Post subject: Re: 36hp Counterweight Crank |
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| esde wrote: |
| I have had DPR make me the same crankshaft. After asking some people [with more 36hp experience than me] , it was recommended that the next improvements be upgrading the stock pod bolts and oil system. I have a set of balanced stock rods with ARP bolts, and have fitted a 26mm pump with grooved main bearings. But, I am still at the mock up/ short block stage, so no real world experience to share. |
Do you have or can you share the arp part # for the bolts so I can or others order them as well if they they wish ..thanks |
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esde
Samba Member
Joined: October 20, 2007
Posts: 5966
Location: central rust belt
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| Posted: Sun May 30, 2021 6:25 pm Post subject: Re: 36hp Counterweight Crank |
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I'll have to look as I no longer have the packaging, but the part number was originally found here on Samba. There is a ton of info to be searched, but sometimes you do have to dig for it
_________________
modok wrote:
Bent cranks are silent but gather no moss. I mean, ah, something like that. |
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earthquake
Samba Member
Joined: January 10, 2008
Posts: 3984
Location: SANDY VALLEY, NEVADA
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| Posted: Mon May 31, 2021 3:40 pm Post subject: Re: 36hp Counterweight Crank |
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I seem to recall it being the same bolt as the 40hp Formula V bolts...
https://arp-bolts.com/kits/arpkit-detail.php?RecordID=100
eQ
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DEATH TO CHINGERS!
[From a military recruitment poster in the novel "The Stainless Steel Rat" By Harry Harrison] |
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esde
Samba Member
Joined: October 20, 2007
Posts: 5966
Location: central rust belt
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| Posted: Mon May 31, 2021 5:46 pm Post subject: Re: 36hp Counterweight Crank |
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Yes!
_________________
modok wrote:
Bent cranks are silent but gather no moss. I mean, ah, something like that. |
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Alstrup
Samba Member
Joined: July 12, 2007
Posts: 7212
Location: Videbaek Denmark
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| Posted: Tue Jun 01, 2021 4:09 pm Post subject: Re: 36hp Counterweight Crank |
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| DANP85 wrote: |
| I have a stock stroke original VW crank with welded on counterweights and lightened flywheel from Jose at DPR stored away for a future project. Knowing stock 36hp cranks can break when revved, what I want to know is how strong are they when they’re beefed up like my particular one. How far can they be pushed? Many thanks in advance! |
As for how much the crank will handle is hard to say. I have a couple of 83,5 x 76 engines on the road with respectively 95 and 105 hp. Both cranks are with full circle reinforcements and have shown no signs of strees after 6 & 4 years of spirited street use.
Soon I will begin on a 78 x 83,5 but that engine will get motorcycle rods in order to get enough room for a decent lift cam. That engine will also be based on a DPR full circle crank.
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https://www.thesamba.com/vw/forum/viewtopic.php?t=435993 |
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