should i polish my heads

Old 01-18-2008, 04:58 PM
  #1  
olds48
Senior Member
RACING JUNKIE
Thread Starter
 
Join Date: Sep 2007
Location: Montvale, VA
Posts: 1,431
Default should i polish my heads

I have a 496 BBC with a set of Canfields.I port matched them to a Felpro 1275 intake gasket,plus the standard bowl blending blahblahblah.....Thing is I only slightly smoothed them out,since I was running the car on the street mostly.Now it spends 80% of its time at the track.Is it worth the troble to go back and put a real smooth polish in the heads?I'm running brackets,so I don't need every ounce of power available,plus I only rev the motor to 7000 MAX.No need to ring out a bracket motor.Would it help consistency any?
olds48 is offline  
Old 01-18-2008, 07:27 PM
  #2  
altune
Senior Member
MASTER BUILDER
 
Join Date: Oct 2003
Posts: 144
Default

Polish the exhaust only
intake should be slightly rough
polished combustion area is ok.
altune is offline  
Old 01-19-2008, 12:26 AM
  #3  
olds48
Senior Member
RACING JUNKIE
Thread Starter
 
Join Date: Sep 2007
Location: Montvale, VA
Posts: 1,431
Default

Really?Whats the reason for that?
olds48 is offline  
Old 01-19-2008, 12:27 AM
  #4  
cepx111
Senior Member
RACING JUNKIE
 
Join Date: May 2006
Posts: 2,044
Default

Anything you can smooth out in the heads and intake will help flow and will build upper rpm HP which I'm not sure is something you'd tap into that much if your only reving to 7 grand, also I agree with what the other reply stated you dont want a super smooth intake port, you want it some what rough to help keep the air / fuel mixture atomized before going into the clyinder rather than having it bead up in the port.
Now, as far as making the car any more consistent?
I don't think you will notice any change there.
The biggest thing I've found that makes a car consistent in bracket racing is by doing the SAMETHING EVERYTIME!
I.E. Same burnout, staging in "EXACTLY" the same spot everytime ( very important ), stalling up the motor exactly the same rpm each time,having the engine at exactly the same tempature each round( harder to do late in the rounds ) keeping up with the air pressure on the rear slicks and not changing it in eliminations much if any from what you dialed your car in time trials, a properly tuned engine and properly jetted carb are also important factors.
( CARB TUNING NOTE )
I like to go on the lean side a bit on my carb (we race nights) so the car doest pick up much when it cools down at night. A rich mixture will drive you crazy trying to dial in right cause the car keeps picking up numbers every round as the cooler more dense air makes more power.
Sorry for the book just trying to help.


Goodluck,
><Charles
cepx111 is offline  
Old 01-19-2008, 12:30 AM
  #5  
olds48
Senior Member
RACING JUNKIE
Thread Starter
 
Join Date: Sep 2007
Location: Montvale, VA
Posts: 1,431
Default

The more "books" the better.I've been to the track alot,but never actually raced yet.Any info at all is a great help to me
olds48 is offline  
Old 01-21-2008, 10:47 AM
  #6  
olds48
Senior Member
RACING JUNKIE
Thread Starter
 
Join Date: Sep 2007
Location: Montvale, VA
Posts: 1,431
Default

Is there any advantage to port matching my exhaust ports?I built a set of fenderwell headers for my car,and am sure they will be on there for years to come.
olds48 is offline  
Old 01-21-2008, 11:13 AM
  #7  
us7race
Senior Member
EXPERT BUILDER
 
Join Date: Aug 2005
Location: Tell City, IN
Posts: 356
Default

Everything like that helps power when done properly..
I have heard people say your crazy not too..basically free HP..
us7race is offline  
Old 01-21-2008, 12:46 PM
  #8  
curtisreed
Senior Member
RACING JUNKIE
 
curtisreed's Avatar
 
Join Date: Feb 2004
Location: KIEFER, OK.
Posts: 1,311
Default

Hey Olds48,

Go over here and do some searching for your questions. You would be amazed at some of the knowledge that is on this forum.

http://speedtalk.com/forum/index.php

Curtis
curtisreed is offline  
Old 01-21-2008, 02:41 PM
  #9  
olds48
Senior Member
RACING JUNKIE
Thread Starter
 
Join Date: Sep 2007
Location: Montvale, VA
Posts: 1,431
Default

Thanks doorracer,I'll check it out.BTW my names Eric.Easier than stretching up for those number keys
olds48 is offline  
Old 01-29-2008, 05:47 AM
  #10  
poncholvr
Senior Member
MASTER BUILDER
 
Join Date: Jan 2008
Posts: 146
Default

Originally Posted by olds48
Really?Whats the reason for that?
i 2nd this question
the faster in- the faster out--- it needs to flow-
try a set of screen style gaskets (reed style)
they will help separate the fuel into air better- instead of using the rough intake,
if fuel doesn't atomize you might as well just (dump) gas in it
thus - fuel injection was born
poncholvr is offline  

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service