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Canadian Poncho Homepage -> Canadian Poncho -> 65-70 Full Size Power Train Tech Forum -> Carl's new 427 build thread.
Post Info TOPIC: Carl's new 427 build thread.
65Camino


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Carl's new 427 build thread.
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Would a 454 crank work ? Perhaps they are easier to find ?

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seventy2plus2


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65Camino wrote:

Would a 454 crank work ? Perhaps they are easier to find ?

He's trying to make a 427.  (same bore as a 454, same stroke as a 396 / 366 truck engine)

 

Carl,  go find a 396 crank.     



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4SPEED427


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4SPEED427 wrote:
seventy2plus2 wrote:
 

Carl,  go find a 396 crank.     

  I found one but what would be the advantage (other than the obvious displacement increase)? It will likely cost more to balance it because they have to add weight, plus the one I found is the same price as the 366 crank and it's about 90 minutes away. The 366 crank is on my floor here now. All I need to do to use the 366 crank is get it balanced and buy the smaller OD pilot bushing.

 



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
cdnpont


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There's a NOS 396 crank in Alberta.

Ouch..

https://www.kijiji.ca/v-engines-and-engine-parts/lethbridge/nos-6223-forged-gm-steel-crankshaft-396-427-l88-l72-l89-l35/1544607677

39.JPG



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4SPEED427


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I saw that one and the bad part is, although he says it's for a 396 or 427 it may be a 396 crank and need to be balanced. I used to think they were the same but now I'm very convinced you can't just plunk a 396 crank into a 427 and think it will be fine.

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
Mike Ward MB


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Ive got a 454 in my Nova, but if I tell people its a 427 who is going to know the difference? Other than casting numbers identifying an original 66 or 67 block casting, the only external differences I am aware of are the counterbalanced damper and flywheel. It can be argued that the side the alternator is mounted is specific, but a little creative wiring and bracketry can make it look however you want.

Dont mean to poke fun Carl! Well maybe a little!



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4SPEED427


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Mike Ward MB wrote:

Ive got a 454 in my Nova, but if I tell people its a 427 who is going to know the difference? Other than casting numbers identifying an original 66 or 67 block casting, the only external differences I am aware of are the counterbalanced damper and flywheel. It can be argued that the side the alternator is mounted is specific, but a little creative wiring and bracketry can make it look however you want.

Dont mean to poke fun Carl! Well maybe a little!

 It's all good Mike, in fact I enjoy it!

As you've seen I'm not the type to give in to pressure....if I was my car would still be a 283/3 on the tree! I've just always like 427's, can't help it. I had a complete 454 here I could have built but instead I'm taking the hard way (and I'm realizing the way more expensive way) to assure it remains a 427.



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
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4SPEED427


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Dano weighed a 402 piston/pin/rings/rod/bearing assembly for me, 1815 grams.
 
I weighed the .020 427 piston/pin/rings/rod/bearing assembly I have, 1816 grams.
 
Go figure.


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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
4SPEED427


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Maybe more for curiosity on this topic than anything, but a 427 forged piston (for a car, not a tall deck) is a difference of 51 grams between standard and .060 oversize according to Speed Pro, L2300F. It's the bottom box in the scan of this page. 

t7.jpg



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
DANO65


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But look farther up at L2268F and they all weigh the same, but they have reduced the dome height. I guess to keep balance the same and compression ratio the same?

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