sbc 350 build up questions - 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 01-06-2004, 03:33 PM
Member
 
Join Date: Jan 2003
Location: NH
Posts: 32
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
sbc 350 build up questions

I'm getting ready to rebuild a 350 for my 78 k-10 w/ 3:07 gears and 33" tire truck. All I want from this motor is 50 million ft lb of torque by 1000 rpms . No seriously i want this thing to have mega low end grunt, and i don't care if it rolls over and goes to sleep after 4k rpms. the block will be bored 30 over I presently have 76cc heads with 1.94 intake valve. For this set up what would be a good cam selection for low end? My other thought is to go look in the pick and pull for another set of heads with perhaps 64cc chambers. So my other Question is what will the increase in compression ratio do for my quest. my heads are casting number 462624 someone told me they were crack prone has anyone had any experiance with them? Thanks to all in advance Ben

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-06-2004, 04:51 PM
Member
 
Last photo:
Join Date: Nov 2002
Location: FT Wayne IN.
Age: 61
Posts: 110
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
try a 383 or 400 or more, longer stroke more torque less rpm,
keep the rods long as possible. 112 degrees between centers on the cam with no more than 262 degrees of duration
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-06-2004, 08:42 PM
Grant209's Avatar
Member
 
Join Date: Dec 2003
Location: Modesto, Ca
Age: 32
Posts: 36
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I think you should consider buying or finding some lower gears....
Grant
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-07-2004, 05:58 PM
Member
 
Join Date: Jan 2003
Location: NH
Posts: 32
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
gears aren't in the budget for right now Thanks for the replys
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 01-07-2004, 06:10 PM
48fordnut's Avatar
Member
 
Join Date: Aug 2002
Location: warner robins ga
Posts: 140
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
install gears and don't spend the other money. with a 33" tire your ratio is probably 2.70 . a better gear will make the diff.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 01-07-2004, 06:36 PM
Member
 
Join Date: Nov 2003
Location: Santa Barbara, Ca
Posts: 32
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I would say put a 3.75" stroker crank in it. This will make a big difference in low end power. There are pretty inexpensive ones ou there. If you are already doing a rebuild, it won't cost you much more. You'll have to clearance the block a little to clear the stroke. Also like the other guys said, gearing makes a big difference too. If you decide to go with a 383 (which I would), this will help to overcome those short gears and big tires you have.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 01-07-2004, 06:50 PM
lluciano77's Avatar
Short changed on common sense
 
Last photo:
Join Date: Jun 2003
Location: california
Age: 37
Posts: 3,548
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
If you want torque like you are talking about, you might want to consider a Pontiac 400. They are super torquey down low because they have a long connecting rod length. It is possible that you already have a dual pattern bellhousing, but if not there are adapters for Chevy pattern to Pontiac bellhousing bolt patterns.

I built a Chevy 400 for my '73 Camaro. It has extra torque that the 350 does not have (possibly another option for you). I was very close to buying a Pontiac 400 before I got my current engine. I mean really close. Out of all the engines I have played around with, they are the torquiest down low and the have the quickest 0 to 60 times. Of course all things being equal.

Another good thing about the Pontiac 400 is that you won't need to change much to make it how your are wanting it to be. I have seen them make cars slower by adding larger cams. If you build it with around 10:1 compression, and keep it basically stock it should get good mileage with more torque than you will get out of a 350 Chevy at the lower RPMs.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 01-07-2004, 06:54 PM
gpeak's Avatar
Member
 
Last photo:
Join Date: Oct 2003
Location: Kansas
Age: 42
Posts: 384
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I vote for putting the money in the gears at first. You would notice a huge difference between 3.07 and 4.11

Last edited by gpeak; 01-07-2004 at 06:59 PM.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 01-07-2004, 07:00 PM
Member
 
Last photo:
Join Date: Oct 2003
Location: Tri-Cities, TN
Posts: 726
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Gears are needed for sure. I would go to www.reedcams.com and get one of the Torque Monster series. I would suggest the 262/272 on a 110 with a 3 degree Advance. Mega stump pulling torque. Ask for Dennis if you call, he will take care of you.

Chris
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 01-08-2004, 05:12 PM
Member
 
Join Date: Jan 2003
Location: NH
Posts: 32
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
this truck currently has a beat 305 in it that needs quick replacement. Thats why the cash is being spent on the engine first. I'll give reeds a call with my problem and see what they have to say. I'm sure no matter what i do the 350 going to be soooo much better than that rag 305.
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 11:28 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.