Home 
Home Search search Menu menu Not logged in - Login | Register
> Jensen Healey & Jensen GT Tech > Ignition > vacuum lines with Dellortos

 Moderated by: Greg Fletcher
New Topic Reply Printer Friendly
vacuum lines with Dellortos  Rate Topic 
AuthorPost
 Posted: 09-25-2011 08:48 pm
  PM Quote Reply
1st Post
rossjfox
Member
 

Joined: 05-19-2008
Location: Montville, New Jersey USA
Posts: 56
Status: 
Offline
What is the purpose of the vacuum lines from the airbox to the oil filler neck?

I switched to Dellortos with pancake filters and no airbox.  Is it ok to just cap the hole in the oil filler neck?

Thanks,

Ross

Back To Top PM Quote Reply  

 Posted: 09-27-2011 01:11 pm
  PM Quote Reply
2nd Post
Brett Gibson JH5 20497
Member
 

Joined: 03-17-2005
Location: Hilton, New York USA
Posts: 712
Status: 
Online
Ross, the oil filler line is a breather off the the valve covers it should not have a vacumn line going to it.

Brett

Last edited on 09-27-2011 01:12 pm by Brett Gibson JH5 20497

Back To Top PM Quote Reply

 Posted: 09-27-2011 10:51 pm
  PM Quote Reply
3rd Post
rossjfox
Member
 

Joined: 05-19-2008
Location: Montville, New Jersey USA
Posts: 56
Status: 
Offline
On my car, oil filler neck "spigott" had a hose going to the carb air filter.  The air pressure inside the air filter should always be at least a slight vacuum.  No?

Are you saying it should just be open to the air?  Or should there be a hose going somewhere else?

Thanks

Back To Top PM Quote Reply  

 Posted: 09-28-2011 01:18 am
  PM Quote Reply
4th Post
Jensen Healey
Super Moderator


Joined: 03-11-2005
Location: San Anselmo, California USA
Posts: 976
Status: 
Offline
My '73 oil cap neck has no breather fitting. Do you have a late model car?

Maybe you can tap into the inner plate of the K&N's?

Kurt

Back To Top PM Quote Reply

 Posted: 09-28-2011 03:02 am
  PM Quote Reply
5th Post
rossjfox
Member
 

Joined: 05-19-2008
Location: Montville, New Jersey USA
Posts: 56
Status: 
Offline
Yes, it is a very late model 75.

I've thought about just what you've suggested.  I can probably do it, but it's surprising how little room there is on the pancake filters when you actually go to try and drill a reasonably sized hole.

But if you don't have one, the question remains what does it do and is it really necessary?  Right now I just capped it.  Mistake?

Ross

Back To Top PM Quote Reply  

 Posted: 09-28-2011 01:16 pm
  PM Quote Reply
6th Post
Brett Gibson JH5 20497
Member
 

Joined: 03-17-2005
Location: Hilton, New York USA
Posts: 712
Status: 
Online
Ross, it is just a vent for the valve covers that at times has a bit of vapor coming out thats why it was hooked up to your old air filter box so that what ever came out was sucked thru the carbs and burned off in the engine. In my setup (not for everyone) I tied it into the engine vapor vent near the starter and then ran that down and under the car, my car is not a heavey breather and I dont get hardly any vapor out the hose but if yours breaths alot of vapor you might want to run it thru the carb's. Some cars had the vent and some didnt so plugging it should not be an issue.

Brett

Back To Top PM Quote Reply

 Posted: 09-29-2011 04:52 pm
  PM Quote Reply
7th Post
rossjfox
Member
 

Joined: 05-19-2008
Location: Montville, New Jersey USA
Posts: 56
Status: 
Offline
Now I understand.  Thanks.

Ross

Back To Top PM Quote Reply  

Current time is 01:52 pm  
> Jensen Healey & Jensen GT Tech > Ignition > vacuum lines with Dellortos Top




UltraBB 1.172 Copyright © 2007-2011 Data 1 Systems