Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine> can i stroke a sbc400
User Name
Password
lost password?   |   register now

Thread: can i stroke a sbc400 Reply to Thread
Title:
  
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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 for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
05-25-2011 07:23 PM
techinspector1
Quote:
Originally Posted by stevetankl
Can you build a 383 stroker with a 400 block/350 crank? If so, what size connecting rods???
Using a +0.030" bore 400 block and a 350 crank will yield a 377. Using a +0.030" 350 block with a 400 crank will yield a 383. Nobody in his right mind de-strokes a 400 unless he wants the breathing of a large bore and also needs less cubic inches to fit into a class restriction for racing, normally based on lbs per cubic inch.

You can use any length rod you want, 5.565", 5.700", 6.000" or whatever, but you have to use the correct piston compression height to work with the stroke and rod length. A common "stack" when building these 383 motors will be 9.000", where the crank radius is 1.875", the rod is 5.700" and the piston is 1.425". Add these components together and find 9.000". If you used the 400 crank with a 6.000" rod, you would have to reduce the piston compression height to 1.125". (1.875" + 6.000" + 1.125" = 9.000"). The stack you use must fit into the block without pushing the piston crown out of the bore so that it would hit the cylinder head. Nominal block deck height (stock) is 9.025".

There is also "squish" to contend with. As the piston comes up in the bore to top dead center on the compression stroke, it is good to have the piston come very close to the underside of the cylinder head in order to squish out the fuel/air mixture that is opposite the chamber. This "jetting" of mixture across the chamber creates turbulence that homogenizes the mixture and eliminates lean and rich pockets of mixture in the chamber so that you get a more complete burn. This squishing of the mixture will reduce the chances of detonation as well. Most fellows find that the motor will tolerate a lesser quality of fuel with a good, tight squish of 0.035" to 0.045" on a small block. This is the dimension from the crown of the piston to the block deck (piston deck height) plus the thickness of the head gasket. For instance, if the piston deck height is 0.010" and the gasket is 0.028", the squish would be 0.038".
05-25-2011 07:08 PM
stevetankl
can i stroke a sbc400

Can you build a 383 stroker with a 400 block/350 crank? If so, what size connecting rods???

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


All times are GMT -6. The time now is 06:39 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.