Intake Manifold is my uncle crazy? - 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 05-14-2012, 10:43 AM
Silver Surfer's Avatar
More machine than man
 

Last journal entry: bwaahhaahahaaahhaa
Last photo:
Join Date: Jul 2005
Location: Kansas City, MO
Age: 37
Posts: 806
Wiki Edits: 0

Thanks: 91
Thanked 60 Times in 50 Posts
Intake Manifold is my uncle crazy?

I have a 350SBC with a XE274H cam (230/236 @ 050 and .490" lift) around 9.8:1 compression ratio and factory Vortec heads. I am guessing 375-400HP and 415 ft/lbs torque. Transmission is a 4 speed manual B/W Super T-10 and a 1981 Chevy C-10 pickup truck with a 3.71 posi rear end. This is a weekend fun truck, all performance street use. No racing, no drag strip, etc.

He is telling that dual plane intakes are for tall gears and automatics. And is trying to direct me use a Victor or Victor Jr. But the operating range of these single plane intakes are so high. I don't really plan to take the engine past 6,500 RPMs (and even then, that is going to be in an extreme Mustang killing situation!), so it seems crazy to have an intake capable of 8,000 RPM's! And lose the low end grunt needed to get this truck moving from the line.

I was looking at a dual plane Edlebrock Performer RPM intake which was like 1,500-6,500 RPM's and seems better suited for street use and my cam. Suggestions?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-14-2012, 11:20 AM
327NUT's Avatar
Registered User
 
Last photo:
Join Date: Dec 2004
Location: So. Utah
Age: 67
Posts: 3,270
Wiki Edits: 0

Thanks: 0
Thanked 83 Times in 74 Posts
It's your engine and your decision ($$$$) but I would buy the Edelbrock Performer for your application. There's a ton of good used ones on ebay also.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-14-2012, 11:29 AM
Silver Surfer's Avatar
More machine than man
 

Last journal entry: bwaahhaahahaaahhaa
Last photo:
Join Date: Jul 2005
Location: Kansas City, MO
Age: 37
Posts: 806
Wiki Edits: 0

Thanks: 91
Thanked 60 Times in 50 Posts
I am not so much concerned about saving a few dollars on the intake, I want to use the best one.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-14-2012, 12:09 PM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 9,049
Wiki Edits: 0

Thanks: 17
Thanked 325 Times in 305 Posts
The cam is a little too big for your application but a RPM intake would be the way to go.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-14-2012, 12:10 PM
Registered User
 
Last photo:
Join Date: Jul 2004
Location: At Speed
Age: 51
Posts: 1,342
Wiki Edits: 0

Thanks: 2
Thanked 27 Times in 27 Posts
Performer RPM AirGap
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-14-2012, 12:11 PM
Dan
 
Join Date: Aug 2010
Location: wisconsin
Posts: 57
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I personally would get the dual plane, better street use but still will have the performance youre looking for
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 05-14-2012, 06:16 PM
Registered User
 
Last photo:
Join Date: Mar 2008
Location: Arkansas
Age: 51
Posts: 298
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Performer RPM AirGap.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 05-14-2012, 09:07 PM
cool rockin daddy's Avatar
1.21 giga-watts???!!!!
 
Join Date: Aug 2003
Location: wherever cool cars are
Posts: 1,535
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Forget the Airgap. No real advantage and fuel icing has been a reported problem. Just go with the Performer RPM. You could do a forum search on here and find out exactly why a dual plane is considered better for the street and a single plane manifold is more for racing.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 05-15-2012, 12:51 AM
JeffB's Avatar
Registered User
 
Last photo:
Join Date: Jul 2006
Location: Phoenix,AZ
Age: 68
Posts: 1,686
Wiki Edits: 0

Thanks: 2
Thanked 87 Times in 80 Posts
Weiand Stealth Intake.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 05-15-2012, 02:12 AM
bracketeer's Avatar
489 Lemans
 

Last journal entry: Street Legal
Last photo:
Join Date: Dec 2004
Location: Courtenay, BC, CehNehDeh
Age: 55
Posts: 2,139
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
edelbrock intake?

dual plane for sure. i've always used airgaps. never had icing problems. but have had perculating problems with out them. if your using a holley carb. use a weiand intake. edelbrock located the vacuum port close to the carb flange in order for it to be easier for you to use their spreadbore carb rather than using the competitions double fuel bowl carb. i believe the weiand is cheaper as well
__________________
[URL]http://members.shaw.ca/g.body.building[/URL]
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 05-15-2012, 06:04 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 597 Times in 546 Posts
For a squarebore carb, Stealth p/n 8151 or RPM p/n 7116 (p/n's are for a natural finish). If more top end is wanted, cut the plenum divider like the RPM Air Gap or add a 1" open spacer if there's clearance.

Last edited by cobalt327; 05-15-2012 at 06:15 AM.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 05-15-2012, 07:31 AM
bracketeer's Avatar
489 Lemans
 

Last journal entry: Street Legal
Last photo:
Join Date: Dec 2004
Location: Courtenay, BC, CehNehDeh
Age: 55
Posts: 2,139
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
spacer

If you have the hood clearance spacers can do wonders. I put a spacer on a victor jr. single plane and picked up .15 seconds. thats appx 15 hp
__________________
[URL]http://members.shaw.ca/g.body.building[/URL]
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 05-15-2012, 09:06 AM
farna's Avatar
Member
 
Last wiki edit: AMC V-8s Last photo:
Join Date: Sep 2002
Location: Batesburg-Leesville, SC
Age: 52
Posts: 1,636
Wiki Edits: 14

Thanks: 0
Thanked 15 Times in 14 Posts
Whether a spacer helps or not depends on the engine setup. Some like more plenum and respond well to spacer, on some a spacer makes no difference, and on a few the spacer will actually hurt power. Cheap enough to try it though.

Definitely a dual plane intake if you're mainly street running. Dual planes keep charge velocity higher and that makes for better low end torque and keeps fuel suspended better at low speeds. Big open plenums work best at higher rpm, great for drag racing, not so great for street.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 05-15-2012, 09:32 AM
lg1969's Avatar
Google "Tunnel Ram 406"
 
Last photo:
Join Date: Oct 2007
Location: Bohemia, L.I.N.Y.
Age: 64
Posts: 1,059
Wiki Edits: 0

Thanks: 1
Thanked 21 Times in 18 Posts
I'm with you, Silver. go for it.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 05-15-2012, 02:16 PM
Silver Surfer's Avatar
More machine than man
 

Last journal entry: bwaahhaahahaaahhaa
Last photo:
Join Date: Jul 2005
Location: Kansas City, MO
Age: 37
Posts: 806
Wiki Edits: 0

Thanks: 91
Thanked 60 Times in 50 Posts
While I do appreciate everyone's input on what intake they suggest, I am really not interested in brands or models, at least just not yet. I need to decide on the type of intake and WHY. Yes I do know that people prefer the dual plane intakes for street because they have better torque at lower RPM's. But does anyone use single plane carb'd intakes off the track?

If anything I am leaning toward going with the single plane intake.

The reasons are three fold:

(1) The truck has no weight, or traction, or fat slicks in the rear end, so it tends to spin the wheels on launches. Perhaps the single plane would tame the torque down low and help the tires bite.

(2) It's a stick and you tend to shift at higher RPM's than an auto you would get the benefit of the single plane power more than you think.

(3) It is geared low so overall the RPM's would be higher during cruising and thus power would be available right now.
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
what intake manifold to use proge Engine 1 10-22-2008 01:31 AM
My intake manifold. TheBRAIN Hotrodding Basics 9 08-22-2006 11:16 PM
intake help?OFFenhauser low pro. ram intake manifold 74chevyflat Engine 0 05-17-2006 07:49 PM
Intake manifold gaskets for alum. heads and intake mustang66maniac Engine 6 02-20-2004 11:19 AM
Intake Manifold fsiramps Engine 2 02-13-2003 05:26 AM


All times are GMT -6. The time now is 09:29 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.