View unanswered posts | View active topics It is currently Mon Aug 21, 2017 11:27 pm



Reply to topic  [ 4 posts ] 
 Question about the "tuner" early seconday opening mod 
Author Message

Joined: Fri Oct 23, 2015 8:43 am
Posts: 33
This looks a little more involved than opening up the slot in the linkage lever as Roe advocates to open the secondaries sooner. What makes the "tuner" mod different / better?


Thu Nov 03, 2016 1:42 pm
Profile

Joined: Wed Oct 23, 2013 8:01 am
Posts: 113
It makes the secondaries more progressive less on & off. If you have a truck carb you can drill the hole in the pri. arm lower & then do the slot & the pri. will open only about 30 deg. before starting to open the sec.


Thu Nov 03, 2016 2:33 pm
Profile

Joined: Fri Oct 23, 2015 8:43 am
Posts: 33
77cruiser wrote:
It makes the secondaries more progressive less on & off. If you have a truck carb you can drill the hole in the pri. arm lower & then do the slot & the pri. will open only about 30 deg. before starting to open the sec.


Thanks. I am aware of the "truck" vs "car" primary arm. I was going to try the "tuner" modification on a "car" core, but I got to reading the Roe book last night and wonder if lengthening the slot in the arm as per Roe was just a different way of doing the same thing (apparently not).


Thu Nov 03, 2016 2:43 pm
Profile

Joined: Wed Oct 23, 2013 8:01 am
Posts: 113
No it's different. If you do the tuner mod you'll see that it adds a pickup point for the secondaries.
The pics on the first page shows it better than I can explain it.

viewtopic.php?f=26&t=498#p4105


Thu Nov 03, 2016 3:01 pm
Profile
Display posts from previous:  Sort by  
Reply to topic   [ 4 posts ] 

Who is online

Users browsing this forum: No registered users and 1 guest


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:  
Powered by phpBB® Forum Software © phpBB Group
Designed by ST Software for PTF.