340 six pack Mopar manifold heat riser; block it? - 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 08-18-2008, 09:46 AM
F&J F&J is offline
Registered User
 

Last journal entry: 32 Ford cabriolet conversion/windshield
Last photo:
Join Date: Mar 2007
Location: Connecticut
Age: 62
Posts: 1,571
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
340 six pack Mopar manifold heat riser; block it?

Car is not a daily driver. The motor has a somewhat stiff cam, and the carb(s) has a cable choke, and mechanical outboard carbs. The carbs were once available from Chrysler as an "off road" part and I assume that's why they do not have vacuum controlled outboard carbs. The center carb is the correct one with smaller bores.

I am taking off the 4 barrel this week to put the tripower on, and looking for comments on blocking off the heat riser channel in the intake manifold.

The manifold is the high rise like on the AAR/TA but I took 1-1/2" off the top to lower the carbs so I can run aircleaners without cutting the hood.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-19-2008, 09:56 AM
Crazy Mopar Guy's Avatar
Member
 
Last photo:
Join Date: Dec 2003
Location: HotRodCity, Canada
Posts: 456
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by F&J
Car is not a daily driver. The motor has a somewhat stiff cam, and the carb(s) has a cable choke, and mechanical outboard carbs. The carbs were once available from Chrysler as an "off road" part and I assume that's why they do not have vacuum controlled outboard carbs. The center carb is the correct one with smaller bores.

I am taking off the 4 barrel this week to put the tripower on, and looking for comments on blocking off the heat riser channel in the intake manifold.

The manifold is the high rise like on the AAR/TA but I took 1-1/2" off the top to lower the carbs so I can run aircleaners without cutting the hood.
Tripower?
Are you a MoPar guy....? j/k

I would block it. Just make sure it's good and warm before driving, because cold drivability will suffer somewhat. I've done it a bazillion times. It doesn't give a huge hp increase though, don't look for any wild power claims to come to fruition IMO.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-19-2008, 02:37 PM
F&J F&J is offline
Registered User
 

Last journal entry: 32 Ford cabriolet conversion/windshield
Last photo:
Join Date: Mar 2007
Location: Connecticut
Age: 62
Posts: 1,571
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Yea, ok...sixpack


I'm a multiple carb guy


I already have cold issues with this motor. Since you brought that up, maybe I should leave them open while I try to get the motor sorted out on just the center carb.

Car sat for 10+ years in a dry barn and the guy who had it for 25 years has no idea what the speed garage did to the motor besides "souped it up". It has the Thermoquad, but no working choke. It starts horrible. It acts flooded right from the first crank, even if it sits for 2 months.

we are going to pull the motor for engine compartment cleanup/paint, but we want to get the engine sorted out first.
If I can't fix it, I'll be back with more questions

So far all I see is direct connection electronic ign added, some chrome....and what sounds like 'too much cam". I am not a cam guy, though. It is a 73 340 motor with the matching exhaust & intake manifolds. I don't know anything about the internals or head work, pistons, etc. It kicks the starter out before it fires, flames back through the carb, etc. The plugs are beyond cleaning & drying because it now won't even "clear out".

I'll report back. Thanks
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-19-2008, 07:31 PM
F&J F&J is offline
Registered User
 

Last journal entry: 32 Ford cabriolet conversion/windshield
Last photo:
Join Date: Mar 2007
Location: Connecticut
Age: 62
Posts: 1,571
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post


This is as far as I got today..test fitting.

Where can I get an angled thermostat housing to clear the carb? The stock Mopars all seem to be pointing straight up?

The heads on this 73 340 have 360 casted in under the valve cover. Is this bad? Were the 73 340 heads better or worse? I wonder if the engine shop did a switch for an upgrade or downgrade?

I also can't find individual air cleaners....

and I need some push on breather caps for the Offy covers, but don't know what to ask for.
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
Big block S-10 a/c heat daily driver roadrash9r Engine 3 06-27-2007 10:11 PM
Building A 302 Chevy Scorpio Shaping Flow Hotrodding Basics 6 01-16-2007 06:55 AM
Mopar Intake Manifold ?? 'cudabob Engine 5 09-27-2003 12:56 PM
Will a 400 intake manifold fit on a 1965 361 Dodge B block? CrashFarmer2 Engine 3 09-07-2003 10:53 AM
Small block Mopar roller rockers engineczar Engine 1 03-27-2003 04:18 PM


All times are GMT -6. The time now is 02:06 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.