350 or 383 for 1963 Chevy Truck - 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 12-29-2007, 08:03 PM
Registered User
 
Last photo:
Join Date: May 2007
Location: Minnesota
Posts: 33
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
350 or 383 for 1963 Chevy Truck

I am working with an engine builder on a motor for my 1963 chevy truck.

My options are a 350 with 400 crank shaft which will put it up to a 383 and approximately 420 HP.

Or, I can go straight 350 which will produce about 375 HP. The pricing difference is about $1500.

Will I miss the difference in HP if I go with the 350?

My installer is suggesting a 350 Turbo Transmission. Thoughts on the 350 Turbo versus a 700 R4 and how would each help my dilema on on different motors?

Thanks in advance for some thoughts.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 12-29-2007, 09:59 PM
CNC BLOCKS NE's Avatar
CNC Blocks Northeast
 
Last photo:
Join Date: Sep 2006
Location: NORTHEAST
Age: 54
Posts: 1,415
Wiki Edits: 0

Thanks: 1
Thanked 10 Times in 10 Posts
we have built some 383's with Vortec heads and have seen the same results as the engine in this link had AFR's
http://www.chevelles.com/forums/show...highlight=DYNO
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 12-30-2007, 06:07 AM
31 five window
 

Last journal entry: Master cylinder
Last photo:
Join Date: Oct 2007
Location: louisiana
Age: 56
Posts: 1,571
Wiki Edits: 0

Thanks: 0
Thanked 13 Times in 13 Posts
IMHO,For a street driven truck The HP is not the main factor as max HP is usually at a higher RPM than you will drive most often. The torque is what matters and the 383 will ,if set up correctly, make more torque at a lower RPM than the 350. Thats why I say go 383. I have done it in a 65 C10 and yes you will notice the difference.Also The 700R4 has 2 advantages, It has a lower first gear that helps with launch, effectively like running a lower rear gear then at cruising an over drive that is like running a higher rear gear. When set up properly you get the best of both worlds. Great 0 to 60 and great drivability for long hauls.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 03-12-2009, 01:04 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 595 Times in 545 Posts
I'm curious as to why the big difference in money.

What does your builder account for the diff? And this is not a knock on your builder, BTW.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 03-12-2009, 01:47 AM
curtis73's Avatar
Hates: Liver. Loves: Diesel
 
Last wiki edit: How to find cheap parts
Last journal entry: 1999-2001: Getting it on the road
Last photo:
Join Date: Dec 2005
Location: Pittsburgh, PA
Age: 40
Posts: 5,128
Wiki Edits: 16

Thanks: 0
Thanked 1 Time in 1 Post
Big HP means big RPM. For a heavy vehicle or a street vehicle that is a no-no unless its just a weekend cruiser.

Big engine means that the same HP is available at a lower RPM with more torque at low RPMs. For example, look at the comparison below. Those two dyno simulations are for a low-power small block, but take a look at them. The two are absolutely identical, but one is a 355 and the other is a 383. The only difference in those two charts is the stroke of the engine.

Same hp, but the 383 makes the same HP at a lower RPM and it makes gobs more torque at low RPMs. Leaving everything else alone and simply increasing displacement will do nothing for HP, but it will increase torque down low. But, you can also use extra displacement (along with cam, heads, compression) to increase HP while keeping the same low end torque. Make sense?

When dealing with heavy vehicles or street driven vehicles, cubic inches are your friend.

And I agree with Cobalt. $1500 is a bit steep.
Attached Thumbnails
Click image for larger version

Name:	350-383comparo.jpg
Views:	70
Size:	48.8 KB
ID:	36833  
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 03-12-2009, 01:57 AM
curtis73's Avatar
Hates: Liver. Loves: Diesel
 
Last wiki edit: How to find cheap parts
Last journal entry: 1999-2001: Getting it on the road
Last photo:
Join Date: Dec 2005
Location: Pittsburgh, PA
Age: 40
Posts: 5,128
Wiki Edits: 16

Thanks: 0
Thanked 1 Time in 1 Post
Here is another example taken to the extreme.

here is the same exact combination of head flow, cam, compression, etc but I changed the bore and stroke to simulate a Caddy 500 engine. Notice it still makes the same exact HP, but look at what the extra cubes did to the torque and where the peaks happen.

In this case, adding the cubes won't add hp, but it does make for a super streetable package that only has to rev to 3500 RPMs to get the same performance as the 350 at 5000 rpms.

And do I even need to mention the additional 150 lb ft of torque at 1000 fewer RPMs Its no wonder people use Caddys for airboat engines
Attached Thumbnails
Click image for larger version

Name:	500-383-350.jpg
Views:	61
Size:	138.6 KB
ID:	36834  
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 03-12-2009, 02:19 AM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,263
Wiki Edits: 326

Thanks: 610
Thanked 770 Times in 660 Posts
Truck = heavy. Needs all the cubic inches and gear it can get. 383/700R4
Please have your builder explain the $1500 and then post it on here.
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Hi. just wondering why the 350 chevy small block is so good... judgedredd Hotrodders' Lounge 78 06-25-2010 08:01 AM
buick 350 - chevy 350 72buick Engine 23 10-13-2009 08:38 PM
1955 Chevy Truck Streamline55 Introduce Yourself 4 12-06-2007 07:22 PM
Headers for a 47-54 Chevy truck with a sbc 350 Roadsire Engine 0 06-30-2005 07:34 PM
Chevy Vortec 350 Truck question 79 Malibu327 Engine 3 07-08-2004 10:41 PM


All times are GMT -6. The time now is 09:02 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.