Intake port matching. Help please - 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 12-12-2004, 02:41 PM
67 Deuce 4 Me's Avatar
Bowtie or Die!
 
Last photo:
Join Date: Dec 2004
Location: TN
Age: 42
Posts: 637
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Intake port matching. Help please

I have a set of dart pro 1 alumnum sbc heads.The intake ports are just slightly taller than the ports on my edlebrock perf RPM intake. I have already port matched the special thicker fel pro gaskets to the heads. My question is..... Is it worth the time to port out my intake to match the heads? there is enough meterial on the intake to do it. And if so would there be any gains in hp. Also these heads hae 215cc intake runners. There going on a 388 stroker 64cc chambers. falt tops 2 eye brow. Comp cams .480 lift 230 dur@050 magnum cam. I intend to keep the rpm range around 6000 max. Are these heads too big for my engine? I bought them incase I wanted to up the power in the future but right now im just wanting a driver and occational drag race.

Last edited by 67 Deuce 4 Me; 12-12-2004 at 03:01 PM.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 12-12-2004, 02:47 PM
lluciano77's Avatar
Short changed on common sense
 
Last photo:
Join Date: Jun 2003
Location: california
Age: 36
Posts: 3,548
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I wouldn't. You are better off leaving the intkae ports alone. I tried to do it on my 5.0 with Trick Flow heads and a torker intake. The ports don't line up exactly because of casting imperfections. The head port sticks out about 1/16" into the intake port. That causes a slighty eddy current. It would have been better if I would have just left the intake a little smaller.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 12-12-2004, 03:01 PM
tornado-tech's Avatar
Member
 
Last photo:
Join Date: Aug 2004
Location: Kansas
Age: 46
Posts: 320
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
If the intake manifold ports are smaller than the head intake ports, that will be ok. If the intake manifold ports are bigger than the head intake ports, that is bad as will cause puddling right where the two ports meet. With your combo, I'd leave it alone and run it since the manifold ports are smaller than the head intake ports.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 12-12-2004, 03:03 PM
67 Deuce 4 Me's Avatar
Bowtie or Die!
 
Last photo:
Join Date: Dec 2004
Location: TN
Age: 42
Posts: 637
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the input guys I had my die grinder out warming it up lol . I guess it goes back in the box.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 12-12-2004, 03:11 PM
Max Keith's Avatar
Member
 
Last photo:
Join Date: Jul 2003
Location: Fort Madison,Iowa
Age: 66
Posts: 2,391
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Port matching

Lay your gasket on the side of the head and scribe a line around the inside of the gasket port hole. Grind back to that line with a 45 degree bevel, smoothing the runner side of the bevel so you dont have a sharp edge. I dont recommend port matching the intake as there is a thing called core shifting, which will often lead to the intake runner and the head port being slightly misaligned. I would only grind out any casting flash or lips inside the intake runner. Picture the head port as a funnel and the intake runner as a hose, shooting into the big end of the funnel. Grinding out the intake runner port will only keep the problem of a possible misalignment intact, and it is also possible that when you mate the two together, that a part of the gasket could even stick out into the passage, creating an obstruction.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 12-12-2004, 03:57 PM
spinn's Avatar
More dogs than bones
 

Last journal entry: This makes a huge difference
Last photo:
Join Date: Oct 2004
Location: midwest
Posts: 2,212
Wiki Edits: 0

Thanks: 0
Thanked 67 Times in 65 Posts
i use the gasket as a template ,and go about 2 inches in. blend it so that the intake port is smaller than the head. on the performer you can take down the center divider a bit too.

tip- powder coat the intake makes it very easy to clean

i dont have any evidence that this really helps. i have done it to all my manifolds. it deffinitely hasnt hurt the performance when compared to stock. who knows

ill attach my pictures
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 12-12-2004, 04:08 PM
New Member
 
Last photo:
Join Date: Dec 2004
Location: Williston,Fl
Age: 53
Posts: 24
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
port matching

this is hotmetal 800, portmatching is critical to high RPM
flow requirements. Volumetric efficiency is reduced when
the velocity of your air charge drops crossing the threshhold
into the larger cylinder head port. If you do not go to the drag strip and race,you do not need to worry about it.

I suggest you go to mondellotwister.com, mondello performance
products. Joe Mondello works very closely with SuperFlow.This alliance has produced a new cutting edge technology using a
solution of fluorescent dye and slow motion photography.

Last edited by hotmetal800; 12-12-2004 at 04:07 PM.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 12-12-2004, 04:40 PM
killerformula's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Carburetor
Last journal entry: Clean up
Last photo:
Join Date: Oct 2003
Location: Northeast
Age: 33
Posts: 3,485
Wiki Edits: 3

Thanks: 13
Thanked 27 Times in 18 Posts
Hmm, yeah those intakes are boarderline...

Futhermore, with that CID and those heads, I would get the 292 comps, the 280 falls a little short of feeding those heads.

K
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 04:51 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.