manifolds - 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 10-14-2012, 04:00 PM
Registered User
 
Join Date: Sep 2011
Location: forks wa
Posts: 41
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
manifolds

I[m about to buy a new manifold and the thing is i can buy a HOLLEY STRIP DOMINATOR 300 . 25 for about 100$ and the thing is they don't have the water ports in the back of the manifold by the distrib does this make a big different or not

second i can get the edelbrock super victor for alto more money but it does have the taping to use the water jacket and want to know if this is worth the money just for the water jacket or not


the engine is sbc 383 aluminum heads 190 carb Holley avenger 670 roller cam and rockers so any info on what to buy is most helpful thanks guys....
Vince

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-14-2012, 04:33 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,284
Wiki Edits: 326

Thanks: 829
Thanked 1,146 Times in 945 Posts
Just curious, what's the operating range of the cam and what's the main purpose of the motor?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-14-2012, 04:38 PM
Registered User
 
Join Date: Sep 2011
Location: forks wa
Posts: 41
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i haven't got the cam back from machine shop but it's going to be like 274 comp cam or some where around there and the car is a buick 78 buick regal street and 6 months out of the year it's going on the strip once a month in our little town
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-14-2012, 07:04 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,284
Wiki Edits: 326

Thanks: 829
Thanked 1,146 Times in 945 Posts
Quote:
Originally Posted by gaurdian101 View Post
i haven't got the cam back from machine shop but it's going to be like 274 comp cam or some where around there and the car is a buick 78 buick regal street and 6 months out of the year it's going on the strip once a month in our little town
So, 6 months out of the year, it's a 100% street car and the other 6 months out of the year it's 10% strip and 90% street. Does that just about sum it up?
You'll be bracket racing, so your E.T. and trap speed won't matter. Consistency is the most important thing in bracket racing.

What I'm leading up to here is your choice of intake manifolds.
The operating range on the Holley 300-25 is 4,500 to 7,600 rpm's.
The operating range on the Edelbrock Super Victor is 3,500 to 8,000 rpm's.

The operating range on a 274 cam is roughly 1,800 to 6,000 and the motor needs matching parts. Use an Edelbrock Performer RPM. Do not use the Air Gap model if you get some cold weather where you live.

Building a motor is all about using parts that complement each other in the same range of rpm's. The RPM makes power from 1,500 to 6,500, about the same as the cam.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-14-2012, 09:21 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 60
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 598 Times in 547 Posts
Quote:
Originally Posted by techinspector1 View Post
Building a motor is all about using parts that complement each other in the same range of rpm's. The RPM makes power from 1,500 to 6,500, about the same as the cam.
This sums it up very well, IMO.

With that cam, vehicle and intended use, an open plenum intake- ANY of them- will not work anywhere near as well as even a stock intake, let alone the RPM. The non air gap is my preference for a street driven car like yours, and doubly so if the temps get low where you live.

Good luck.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-14-2012, 10:27 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 8,639
Wiki Edits: 0

Thanks: 364
Thanked 857 Times in 819 Posts
especially with that small carb and cam,use a street dual plane.
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:
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
Intake manifolds jimbobhog Engine 3 03-09-2011 07:43 PM
Using bc/cc on exhaust manifolds.... STATUTORY GRAPE Body - Exterior 6 03-08-2007 05:30 AM
chevy manifolds aceofspades49c Engine 6 01-12-2006 10:14 PM
intake manifolds dragon wagon Engine 1 03-05-2004 09:13 PM
manifolds:old vs. new? ztoy Engine 4 02-27-2003 04:01 PM


All times are GMT -6. The time now is 10:20 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.