Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic -- 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> SBC 377 vs SBC 383
User Name
lost password?   |   register now

Thread: SBC 377 vs SBC 383 Reply to Thread
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.
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


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)
11-09-2009 11:18 AM
ap72 a 377 should make more power and tq, across the entire RPM band. HOWEVER a 400 will beat both of them in most instances.
11-09-2009 08:30 AM
70CHEVYSHORTY Thanks guys for your input. I'm just finishing by 355 build so i'm not looking into another motor yet. But i love to have one on a motor stand to be able to go out and toy with from time to time and not have to be in a hurry to get it running. I was thinking about the 377 just for a few simple reasons. As gasman41 said i thought it would be a very snappy set up. There are not as many out there as 383. And i would have a 400 block that one day i could take apart if wanted and make a big motor 415 or somthing. Thanks for your help guys. Keep it coming. I like to read and learn about different setups as i'm only into car and truck motor build for about a year.
11-08-2009 07:12 PM

the 377 takes less cam to turn the same rpm as the 383...
11-08-2009 06:31 PM
Originally Posted by ericnova72
Built for the SAME purpose, using parts matched to each bore/stroke combination, to run in the SAME rpm window or SAME race class.....there won't be 6-10hp difference between the two.
11-08-2009 06:14 PM
ericnova72 Built for the SAME purpose, using parts matched to each bore/stroke combination, to run in the SAME rpm window or SAME race class.....there won't be 6-10hp difference between the two.
11-08-2009 01:37 PM
gasman41 a buddie and i did this years ogo 82'ish he had the 383 in a 72 nova, ihad the 377 in a 73 chevelle[heavy] 377 was a snappy motor!!!!
11-08-2009 11:40 AM

Thank you guys for your input.
11-08-2009 10:05 AM
oldBodyman Build the 350 or 400, it's easier, but that's not your question.

All else being equal the long stroke 383 will make more torque, better fuel mileage and cleaner emissions thanks to mechanical advantage and longer burn-time per cycle.
11-08-2009 08:45 AM
454C10 383 or 377 will not have a significant difference.

use the 400 block with the 400 crank to make max power.
11-08-2009 08:13 AM
SBC 377 vs SBC 383

Hey guys so I was reading an artical in one of my perfomance mags and it got me thinking and i know asking you guys would be the best thing to do.
So my question is Take a 2 motors same heads c/r cam and all of that stuff but have one a 383 350 block 400 crank. and make one a 400 block with a 350 crank. What motor is going to produce more power and whats the difference between the 2 builds going to be?
Thanks for reading i'm really excited to read what you guys have to say.

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 09:41 AM.

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