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#21
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Yes i would not use that crankshaft
That said the days of them just sitting around everywhere are long gone 15 years ago when i lived in CA. it was incressingly hard to find V8 rear wheel drive cars in bone yards at that time, It cant be better now About the only source for them now is people that have been sitting on them for a long time
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If your not at the table you're on the menu A man who falls for everything stands for nothing. |
#22
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67 LeMans, 326, M20, 3.31 12 Bolt Last edited by Joe-Touring; 03-24-2023 at 12:19 PM. |
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#23
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Thanks dragn. Im running a 4 spd, is it cut for a pilot bushing. Im interested, sent you a pm. What’s the interchange on cranks? How early of a crank can you put into a later block?
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67 LeMans, 326, M20, 3.31 12 Bolt |
#24
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I would buy an aftermarket crank and find a new machine shop to check the crank and rebalance. No way should that crank have been cut and polished even if it was going into granny's sunday car.. The shop you used machined an unusable crank and just wasted your money. Those pits were visible before machining.
Any crank you buy will need to be checked, balanced and polished at a minimum. If you have the bob weight card from the prior balance job, you could in theory have the new machine shop balance the new crank without weighing the rods and pistons but judging from that shop's work, I'd have the entire rotating assembly balanced by a different shop just to be sure.
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Triple Black 1971 GTO Last edited by NeighborsComplaint; 03-24-2023 at 12:12 PM. |
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#25
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OP- Where are you located? I have a standard 400 N crank
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears ‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears '69 LeMans Vert, 350, #47 heads: work in progress |
#26
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67 LeMans, 326, M20, 3.31 12 Bolt Last edited by Joe-Touring; 03-24-2023 at 12:21 PM. |
#27
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Ugh seems like that is the consensus. By the way, super cool road race engine you put together. I’ve been wanting to do some road course track days for a while.
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67 LeMans, 326, M20, 3.31 12 Bolt |
The Following User Says Thank You to Joe-Touring For This Useful Post: | ||
#28
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67 LeMans, 326, M20, 3.31 12 Bolt |
#29
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Since the owner’s reputation was getting destroyed, he took the business back and found it was a mess. Cyl head guy quit a couple months ago, packed up in the middle of the night. The owner is now finding that head guy didn’t have a lot of documentation for the engine parts he took from customers, no phone number to even ask what’s been dropped off. He lost my Crower retainers. ANYWAYS, I heard the crank grinding machine was sold, so I’m not sure if the shop could even make it right. I hear on this forum how many guys have 1 shop they trust, I get it. I’ve had terrible luck with local shops. I think I’ll try to get up to Dave at SD Perf. I think he’s about 3 hours north of me
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67 LeMans, 326, M20, 3.31 12 Bolt |
#30
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I’m in western WA. Looks like you’re on the opposite coast. Probably prohibitively expensive. I do appreciate it tho
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67 LeMans, 326, M20, 3.31 12 Bolt |
#31
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Don’t know anything about it (not mine) but could be an option for you.
https://lewiston.craigslist.org/pts/...602729443.html |
#32
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Tom S would know better than me. I would NOT buy ant cheap, cast aftermarket 400 crank. Get a PMD N or Arma steel crank and do a spec grind and balance. The only aftermarket 400 crank I would ever buy is a forging, and they are hard to find. |
The Following User Says Thank You to Dragncar For This Useful Post: | ||
#33
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Take a look at Franks Pontiac parts on line.
He is in California so shipping might not be too bad.
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I do stuff for reasons. |
The Following User Says Thank You to 25stevem For This Useful Post: | ||
#34
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From what I can see in the photos, a .020 undersize grind could take care of the problem. Whoever polished it really should stop attempting to polish cast nodular cranks. NDT (magnaflux) isn’t a standard practice for most machine shops; you have to request it. I wouldn’t grind a crank that hasn’t been magnafluxed. You might want to have a replacement crank on hand just in case this one fails NDT.
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“It takes considerable knowledge just to realize the extent of your own ignorance.” Dr. Thomas Sowell |
#35
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Also please note that shops that do not have a crank grinding machine can NOT properly polish a Nodular iron crank.
This also rules out a often done home polishing job! Out of this box is printed what’s in the next photo.
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I do stuff for reasons. Last edited by 25stevem; 03-24-2023 at 07:54 PM. |
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#36
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Crank snout is not a big deal.I have built a lot of late engine with the short snout.Tom
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#37
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“It takes considerable knowledge just to realize the extent of your own ignorance.” Dr. Thomas Sowell |
The Following User Says Thank You to hurryinhoosier62 For This Useful Post: | ||
#38
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Joe-Touring (Dan) is stopping by my place tomorrow. I have a few for him to choose from and he will be back in business.
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DragStarLeMans |
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#39
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Fixed it for ya. Gach has the value-ad idea to get a Stoker crank and Slugs
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#40
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The crank J-T wanted had a weird anomaly so it was a no go. Not sure what to make of it so please chime in.
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DragStarLeMans |
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