Fordmods Logo

head porting - cutting back valve guides? 

 

Page 1 of 1 [ 7 posts ] 

 
 Post subject: head porting - cutting back valve guides?
Posted: Tue Oct 09, 2007 7:46 pm 
Technical Contributor
Offline
User avatar

Age: 33

Posts: 5858

Joined: 5th Nov 2004

Gallery: 8 images

Ride: '95 EF's

Location: Leederville
WA, Australia

hey all

as per title - have been told to cut back the valve guides to remove extra restriction - should i take them right back flush with the ports? both intake and exhaust sides? anything to be careful of? will be done in-situ as the valve seats have already been done so can't be bothered doing them again! :P

cheers!

 

_________________

R.I.P. Scotty

Top
 Profile  
 
 
Posted: Tue Oct 09, 2007 8:30 pm 
Getting Side Ways
Offline
User avatar

Age: 48

Posts: 7029

Joined: 18th Apr 2005

Location: Hobart
TAS, Australia

Leave at least half of the valve guides.

 

_________________

Mind f**k!!! it works on feeble minded ignorant sheeples... there's plenty of em on this site... some are very intelligent but by god they are so thick!!!

Pakrat wrote:
You can buy them seppertly

Top
 Profile  
 
 
Posted: Sun Nov 11, 2007 8:25 pm 
Oompa Loompa
Offline

Age: 35

Posts: 48

Joined: 4th May 2006

Ride: Fairmont Turbo

Location: brisbane
QLD, Australia

It will flow better if you streamline the valve guide boss instead of removing it. You may go backwards if you cut it out completely.
Top
 Profile  
 
 
Posted: Sun Nov 11, 2007 8:37 pm 
Getting Side Ways
Offline

Posts: 6166

Joined: 8th May 2007

EDIT: wrong post

Last edited by FordFairmont on Sun Nov 11, 2007 9:05 pm, edited 1 time in total.

Top
 Profile  
 
 
Posted: Sun Nov 11, 2007 8:43 pm 
Getting Side Ways
Offline
User avatar

Age: 49

Posts: 6467

Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

Remember, the shorter the guide, the more it won't last.

 

_________________

http://youtu.be/jJTh9F3Vgg0

Top
 Profile  
 
 
Posted: Sun Nov 11, 2007 8:53 pm 
Getting Side Ways
Offline
User avatar

Age: 85

Posts: 1088

Joined: 30th Jan 2005

Gallery: 16 images

Ride: F350

Location: Brisbane
QLD, Australia

FordFairmont wrote:
You will lose compression but can gain it back by shaving the head but you gotta know how much.

Ive said it before & i'll say it again..... its all pissing in the dark unless you can measure properly whats goin on

And yes, i know some people can piss in the dark better than others :shock:


How does a shorter guide boss alter compression, I am intrigued?
Top
 Profile  
 
 
Posted: Sun Nov 11, 2007 9:04 pm 
Getting Side Ways
Offline

Posts: 6166

Joined: 8th May 2007

ELGT wrote:

How does a shorter guide boss alter compression, I am intrigued?


Sorry thought we were talking about swirl ridge
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 1  [ 7 posts ] 

Who is online

Users browsing this forum: DStirrup and 17 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Fri Dec 15, 2017 10:16 am All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names