Welcome to the Connecticut Z Car Club Forums




Username:  
Password:  
Log me on automatically each visit
Register 
It is currently Thu Sep 20, 2018 7:12 pm
Welcome to the Connecticut Z Car Club Discussion Forums   
If you have trouble logging in or encounter any issues, please send an email to webmaster@ctzcc.com.

All times are UTC - 5 hours





Post new topic Reply to topic  [ 37 posts ]  Go to page Previous  1, 2, 3
  Print view Previous topic | Next topic 
Author Message
PostPosted: Mon Oct 09, 2017 7:15 pm 
Offline

Joined: Fri Dec 25, 2015 7:39 pm
Posts: 449
Location: Long Island, N.Y.
Maybe the fuel line diameter variation is that way to set up a venturi (?) to speed up the fuel delivery? Where a large volume(large diameter = more fuel) has to go through a smaller diameter and therefore must speed up because of that decreased diameter? I'm not sure if "faster" fuel delivery is more important than larger volume. Just my opinion and thoughts on why it may be the way it is. :mrgreen: :wink:

Howard J

_________________
1985 300ZX- GLL Dark Pewter Metallic - Survivor


Top
 Profile  
 
PostPosted: Wed Oct 11, 2017 9:19 am 
Offline

Joined: Fri Jun 23, 2017 5:34 am
Posts: 54
I think I have a manufacturing "opps" in the mechanical fuel pump I bought from the zcardepot. The pump I took out has 5/16" line in and 1/4" line out. The pump I bought has 1/4" on both sides. That makes sense, sucking verse pushing.

_________________
Bruce - Early 260Z - 305 Light Blue Metallic - All Stock


Top
 Profile  
 
PostPosted: Thu Oct 12, 2017 1:02 am 
Offline

Joined: Wed Apr 09, 2008 5:53 pm
Posts: 12862
Location: CT
Should be metric measurements on both sides.

Did the fuel lines changed diameter over the years? Several other models (some pickup trucks, some Roadsters, some sedans) shared the same pumps and others had specific pumps; maybe they sent you one of the wrong ones by mistake? We can ask Carl Beck or Vinny Bedini whether the fuel line diameter changed on Z cars or not.

_________________
1970 240Z


Top
 Profile  
 
PostPosted: Thu Oct 12, 2017 10:28 am 
Offline

Joined: Wed Apr 09, 2008 5:53 pm
Posts: 12862
Location: CT
Carl Beck advises you unscrew the inlet fixtures on both the old and new pumps and try to screw the old one into the new pump. That way it won't matter which size is right.

_________________
1970 240Z


Top
 Profile  
 
PostPosted: Thu Oct 12, 2017 3:54 pm 
Offline

Joined: Wed Apr 09, 2008 5:53 pm
Posts: 12862
Location: CT
Vinny Bedini says the 260 flattop pumps are slightly different than the 240 roundtop pumps but didn't know the inlet lines were different diameters. He asks why it matters? Just swap the inlet fitting from the old pump onto the new pump and the problem is solved.

Starting to sound like a non-problem unless you didn't have an old pump to begin with. Then you would have to find a specific pump. Right now all you need do is swap the inlet fitting and you're good.

Interesting bit of Z trivia, tho!

_________________
1970 240Z


Top
 Profile  
 
PostPosted: Sat Oct 28, 2017 7:21 am 
Offline

Joined: Fri Dec 23, 2016 7:11 am
Posts: 265
Another thing to note, if the pump you purchased from Zcardepot has the stamped metal top on it (not a screw on like the original) you may find it doesn't deliver enough fuel at higher rpms.

I was running one earlier this Zeason on my 260z and couldn't pull past 4,500rpm. I finally spoke to Vinny about it and he had me swap an o.e. one back on. She now starts quicker and pulls to 6,000 without issue.

He can get o.e. replacements if you decide you need one.

Jay


Top
 Profile  
 
PostPosted: Wed Nov 01, 2017 8:53 pm 
Offline

Joined: Fri Dec 23, 2016 7:11 am
Posts: 265
How are you making out with this?


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 37 posts ]  Go to page Previous  1, 2, 3

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 2 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

Search for:
Jump to:  
cron









Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
mile200 v1.0.1 designed by Team -Programming forum- .