350 with 400 rods? - Hot Rod Forum : Hotrodders Bulletin Board
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
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 11-05-2002, 12:58 PM
slider in wa's Avatar
Slider in Wa.
 
Last photo:
Join Date: Aug 2002
Location: Benton City Wa.99320
Age: 63
Posts: 700
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post 350 with 400 rods?

Did i understand that it can be done? Did i understand this would product 11:1 compression and will run on 87 octane? What crank would i use? the 400 or the 350? If i use a 400 crank then it becomes an internally balanced engine right?
Thanks
Slider in Wa.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-05-2002, 02:17 PM
Member
 
Last photo:
Join Date: Nov 2002
Location: Tennessee
Posts: 56
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

I too have heard that shorter rods enable a slight compression increase for the same grade of gas, this is why chev used such a short rod in the 400. but i had a 377 one time with 400' rods and the sort rods made it a b!&$ to keep the bores clean. by the time i got done romping on the motor fora year(yes teir was a correctbreak in period}the walls were shaped like a piramid.
soon after that i read some books by david vizard and smokey yunik and they preached heavily against the shorter rod. but i have to say-it made some reall good downlow power--hope i helped
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-05-2002, 02:20 PM
Member
 
Last photo:
Join Date: Nov 2002
Location: Tennessee
Posts: 56
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

ohh yeah -i left something out--the 400 crank is externally balanced,but you can have it internally balanced with heavy metal in the counterweights for a hefty sum of money
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-05-2002, 03:39 PM
F-1Rodder's Avatar
Member
 
Join Date: Feb 2002
Location: Seattle
Posts: 517
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

I find it hard to believe that 11:1 will run on anthing but super gas.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-05-2002, 03:54 PM
BOBCRMAN@aol.com's Avatar
Member
 
Last photo:
Join Date: May 2002
Location: Holly, michigan
Posts: 8,084
Wiki Edits: 0

Thanks: 23
Thanked 258 Times in 242 Posts
Post

you cannot put a 400 crank in a 350 without having the mains turned to 350 specs, around this area you can buy a 383 cast stroker crank for very little more money and have a better crank, you have to have the thing balanced anyway so why not do it right and use a 5.7 or longer rod and correct piston. short rods are hard on cylinder walls, gm built the 400 with a short rod for production economy, they did not produce this motor for high performance, most had two bbl carbs. they just wanted a torque motor for all the big barges they were producing.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 11-05-2002, 06:35 PM
TurboS10's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Auto Terms and Definitions Used in Modern Engine T... Last photo:
Join Date: Sep 2002
Location: Texas
Age: 36
Posts: 3,463
Wiki Edits: 2

Thanks: 0
Thanked 0 Times in 0 Posts
Post

I think you missunderstood. There is no practical reason for putting shorter 5.65 400 rods in a 350, and I would be surprised if there were pistons out there to support this. You can put aftermarket 6 inch rods in the 350. I think the statment about 11:1 on 87 is a misinformed one. If a tight lsa cam was used you might be able to run 93 on 11:1, and that is a big might. I would stick to 10:1 and save yourself the grief of 11:1. The performance advantage is not work the chance that it will be a huge pain in the *****

Chris
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 11-06-2002, 04:27 AM
slider in wa's Avatar
Slider in Wa.
 
Last photo:
Join Date: Aug 2002
Location: Benton City Wa.99320
Age: 63
Posts: 700
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Thanks Chris and guys. I was just trying to reason out the 11:1 comp on 87 octane. I am not building this, just trying to understand a previous post i read on here. So thank you all.
Slider in Wa.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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



All times are GMT -6. The time now is 01:10 PM.


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.