Fordmods Logo

Using vacuum leak for performance 

 

Page 2 of 2 [ 18 posts ] Go to page Previous  1, 2

 
 Post subject: Re: Using vacuum leak for performance
Posted: Fri Dec 19, 2014 12:52 pm 
Getting Side Ways
Offline

Posts: 836

Joined: 1st Apr 2005

Gallery: 4 images

Ride: EF XR6 Wagon, AU2 XR6 VCT

Power: 148 rwkw

Location: Auckland
New Zealand

I'm sure some of the principles used on EFI throttle bodies can be used on carbs as well:
- cut away one side of the throttle shaft (the side with the head of the screws, not the threads)
- shave about 30-40% of the remaining side of the shaft and round it off a bit
- knife-edge the throttle butterflies (especially the leading edge); leave the edge that contacts the carb bore where it is, but file down the other side to create a knife-edge - flat on one side, angled on the other.
- if you are looking for every poofteenth of gain, shorten the screws that now protrude into the airflow.

A throttle body can gain about 8% airflow this way; a carb should be similar.

 

_________________

95 EF XR6 wagon, 17" FTRs, DBA, QFM, KYB/Koni, AU block, ported EF head, SS Inductions, Territory intake, MLS gasket, milled, Franklin RH24B cam, Coby headers, no cat, Tickford 2.5", 2800rpm stall, J3 chip

Top
 Profile  
 
 
 Post subject: Re: Using vacuum leak for performance
Posted: Sun Dec 21, 2014 6:20 pm 
Fordmods Newbie
Offline

Posts: 15

Joined: 15th Dec 2014

Location: sydney
NSW, Australia

more posibilities:

the vacumn brake booster doesn't work, and you might get check engine light on because long term fuel trim exceeds max value
Top
 Profile  
 
 
 Post subject: Re: Using vacuum leak for performance
Posted: Sun Dec 21, 2014 6:54 pm 
Technical Contributor
Offline

Age: 60

Posts: 6817

Joined: 22nd Jun 2005

Gallery: 8 images

Ride: EF Fairmont

Location: Campbelltown
NSW, Australia

fbaxt05 wrote:
more posibilities:

the vacumn brake booster doesn't work, and you might get check engine light on because long term fuel trim exceeds max value


What engine light?

It's an EA witha 350 Holley fitted..............
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 2 of 2  [ 18 posts ]  Go to page Previous  1, 2

Who is online

Users browsing this forum: No registered users and 26 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 Sun Dec 17, 2017 10:26 am All times are UTC + 11 hours

 

 

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