Photobucket
Members Login
Username 
 
Password 
    Remember Me  
Post Info TOPIC: Carl's new 427 build thread.


Canadian Poncho Superstar!

Status: Offline
Posts: 7805
Date:
RE: Carl's new 427 build thread.


I spent good money and had my Scat crank and rods balanced and matched at a shop in California. The pistons and pins came all matched weight. The only differences that could throw it off would be the rings and perhaps the rod bearings.

I don't know if it was money well spent, but the engine certainly feels smooth as it pulls up into the higher revs.



__________________
65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 


A Poncho Legend!

Status: Offline
Posts: 43744
Date:

Suddenly tonight I had a crazy thought. I wonder if the pilot bushing hole in the 366 crank is the right size, because on a 366 the pilot bearing is in the flywheel, not the back of the crank. Sure enough, compared it with a small block crank and the hole size is wrong in the 366. It appears the hole in the 366 crank is 1.06" vs 1.09". 1.09" is the standard Chevy pilot bushing.

Looks like I will need to find a conversion bushing for one of the earlier engines where the crank was originally in front of an automatic. Those ones have the hole that measures 1.06"

__________________

1966 Strato Chief 2 door, 427 4 speed, 44,000 original miles "FAKE_66"



Poncho Master!

Status: Offline
Posts: 2773
Date:

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

__________________

Remember Fun,

 Remember Laughter ?



Canadian Poncho Superstar!

Status: Offline
Posts: 6244
Date:

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.     



__________________
70 2+2 convertible
70 2+2 hardtop
70 Parisienne hardtop
72 GMC Sierra

 

 



A Poncho Legend!

Status: Offline
Posts: 43744
Date:

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.


 



__________________

1966 Strato Chief 2 door, 427 4 speed, 44,000 original miles "FAKE_66"



Canadian Poncho Superstar!

Status: Offline
Posts: 7805
Date:

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



Attachments
__________________
65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 


A Poncho Legend!

Status: Offline
Posts: 43744
Date:

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.

__________________

1966 Strato Chief 2 door, 427 4 speed, 44,000 original miles "FAKE_66"



Addicted!

Status: Offline
Posts: 333
Date:

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!



__________________

72 Nova SS,   66 Beaumont Sport Deluxe,   09 Pontiac Solstice GXP Coupe



A Poncho Legend!

Status: Offline
Posts: 43744
Date:

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.



__________________

1966 Strato Chief 2 door, 427 4 speed, 44,000 original miles "FAKE_66"



A Poncho Legend!

Status: Offline
Posts: 43744
Date:

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.


__________________

1966 Strato Chief 2 door, 427 4 speed, 44,000 original miles "FAKE_66"



A Poncho Legend!

Status: Offline
Posts: 43744
Date:

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



Attachments
__________________

1966 Strato Chief 2 door, 427 4 speed, 44,000 original miles "FAKE_66"



Poncho Master!

Status: Offline
Posts: 1625
Date:

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?

__________________

Stony Mountain, MB

65 Impala SS 2dr HT
65 Impala convert.
59 Impala 2dr HT
67 Acadian Canso 2dr HT

 

 

 

«First  <  1 2 3 | Page of 3  sorted by
 
Quick Reply

Please log in to post quick replies.

Tweet this page Post to Digg Post to Del.icio.us
.
Support Canadian Poncho!
Select Amount:
<
.
.
.