Login    Forum    Search    FAQ

Board index » Racing Forum » Fuel Systems

It is currently Thu Jan 17, 2019 5:08 pm
All times are UTC - 5 hours
View unanswered posts | View active topics
 



Post new topic Reply to topic  Page 1 of 1
  [ 2 posts ] 

Weird Manifold vacuum traces

Author Message
fourtenposi
 Post Posted: Mon Feb 04, 2013 9:24 pm 
Offline

Joined: Thu Feb 12, 2009 7:52 pm
Posts: 348
Hey All,

When I made my 1/4 mile passes, I noticed some weird manifold vacuum traces. It may be a logger issue, but basically what I am seeing is manifold peaking at the top of first gear at 7000 rpms at 1.67, than on the shift, rpm drops to 6000 and rises to about 1.57 at 7000 and stays there all the way up to 7800.

So I am thinking maybe my airpan is providing a little ram air effect? Any thoughts?

_________________
74 Nova
Best 9.87@131 on the rev limitor 1 Feb 2013
1/8   6.15@110 NEW BEST 27 Nov 11
Image
Top 
 Profile  
 
treyrags
 Post Posted: Tue Feb 05, 2013 4:44 pm 
Offline

Joined: Fri Jul 09, 2010 11:21 pm
Posts: 13
Yes, my vacuum logs do the same. Slightly less vacuum at top of high gear than top of 2nd at same rpm. I have a sealed scoop as well. My last one was 1.09" @ 6000 in second and .97" @ 6000 in high.
Top 
 Profile  
 
Display posts from previous:  Sort by  
 
Post new topic Reply to topic  Page 1 of 1
  [ 2 posts ] 

Board index » Racing Forum » Fuel Systems

It is currently Thu Jan 17, 2019 5:08 pm
All times are UTC - 5 hours
View unanswered posts | View active topics
 

Who is online

Users browsing this forum: No registered users and 5 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

Search for:
Jump to:  
cron