Turn 396 into 427? - Team Camaro Tech
Engine General Engine Discussion.

 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old Dec 4th, 05, 05:26 PM Thread Starter
Senior Tech
Mark
 
Join Date: Oct 2002
Location: melbourne
Posts: 280
Send a message via AIM to tronic72
Question Turn 396 into 427?

Hi Guys,

I've got a 68 with a 396 325 HP BB. Is it possilbe to modify this into a 427? I assume the differance between the 427 is bore or stroke?

Another thing. Why would the BB 396 Engine rebuild kit be nearly twice the price of the BB 427 Kit? I'm going from the Classic industries catalog.

Thanks, Mark J
tronic72 is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old Dec 4th, 05, 05:55 PM
Senior Tech
 
Join Date: Dec 2004
Location: Goffstown NH
Posts: 266
Re: Turn 396 into 427?

You would have to bore a 396 .154 thousanths from 4.094 to 4.250 and that would leave extremely thin cylinder walls. Rebuild kits should be just about the same price. They use the same bearings and gaskets, pistons and rings are all that are different.
fiveforty is offline  
post #3 of 7 (permalink) Old Dec 5th, 05, 06:26 AM
 
Join Date: Apr 2000
Posts: 21,341
Smile Re: Turn 396 into 427?

An old hotrodders trick is to stick a wooden pencil between the cylinders through the side freeze plugs and if it won't slide through, sonic check her b/c it probably will bore out to .155" over to create the 4.250" bore of the 427.

pdq67

PS., if the pencil slides through, I would look for another block w/o sonic testing it.



pdq67 is offline  
 
post #4 of 7 (permalink) Old Dec 5th, 05, 06:56 AM
Gold Lifetime Member
Mike
 
Mike_M's Avatar
 
Join Date: Oct 2005
Location: Hawkestone, Ont. Canada
Posts: 856
Send a message via MSN to Mike_M
Re: Turn 396 into 427?

As far as I understand it, the 396 and 427 share the same (or similar) crankshaft but a different block - the 454 is block is the same dimensions as the 427, but different from the 396. The 454 crank would have a longer stroke. I could be mistaken, though, someone please correct me if I'm wrong.

Mike...

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Mike_M is offline  
post #5 of 7 (permalink) Old Dec 5th, 05, 07:22 AM
 
Join Date: Oct 2005
Posts: 477
Re: Turn 396 into 427?

What demensions are you looking at that are different on the 396 block than a 427 or 454 besides internal?
A 454 4.000 in stroke crank with a .030 bore 396 block makes a 427.4ci motor.
Not looking at their catalog but everyone has their reasons when they price their kits. They may have a hard time getting 427 pistons or parts Im not sure. Also It could be that his supplier is charging him more. And last make sure its the same quality parts in each kit. The 427 kit may be listed with a steel crank and the 396 has a cast crank for example.

Last edited by TexasPerfProd; Dec 5th, 05 at 07:37 AM.
TexasPerfProd is offline  
post #6 of 7 (permalink) Old Dec 6th, 05, 11:15 AM
 
Join Date: Nov 2005
Posts: 31
Re: Turn 396 into 427?

why not just bore the 396 ( actually 402) out .30 for a 409 or 60 over for what ,, about a 417?
BadLatitude is offline  
post #7 of 7 (permalink) Old Dec 7th, 05, 06:45 AM
 
Join Date: Apr 2000
Posts: 21,341
Smile Re: Turn 396 into 427?

OR for about the same money, start with a 454 P/U core block and bore it out to say a.060" over, then use your rotating assembly to make about a 440" motor!

Or boring it an 1/8th over will make it right at a 452" motor!!

But for all this trouble, I would save the 396 IF it is stock and make a 496" motor!! Then you can make BIG easy power!!

pdq67



pdq67 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in













Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome