fuel pressure

Old 08-10-2007, 05:48 PM
  #1  
zano
Member
JUNIOR BUILDER
Thread Starter
 
Join Date: Feb 2006
Posts: 72
Default fuel pressure

i have a aeromotive pump on a 632 chevy the pre set pressure is 9 i just ran the pump and looked at gauge. is this what i should keep it at?
zano is offline  
Old 08-10-2007, 06:02 PM
  #2  
mcracecars
Senior Member
EXPERT BUILDER
 
Join Date: Dec 2006
Posts: 272
Default

engine size is not a factor in regulated pressure, too much pressure will overpower the needle and seats in the carb and cause flooding.....
9 seems a little high to me, I like about 7, but if the regularor is a return style it may be ok.
mcracecars is offline  
Old 08-10-2007, 06:18 PM
  #3  
bjuice
Administrator
RACING JUNKIE
 
bjuice's Avatar
 
Join Date: Apr 2003
Location: Greenville s.c.
Posts: 3,236
Default

i 2nd what Ed said......also where are you getting your reading ?

Brian
__________________
Bjuice..

"I'M YOUR HUCKLEBERRY ! "
bjuice is offline  
Old 08-10-2007, 06:33 PM
  #4  
zano
Member
JUNIOR BUILDER
Thread Starter
 
Join Date: Feb 2006
Posts: 72
Default

it has a regulator i'm taking it off the port for the gauge and i have it mounted right at the carb. it has a set screw for adjusting do you think i should drop it to 7? it does have a return line also
zano is offline  
Old 08-10-2007, 10:05 PM
  #5  
fishman1
Senior Member
MASTER BUILDER
 
Join Date: Dec 2005
Location: alberta,canada
Posts: 166
Default

I agree 7 pounds is the normal, i have got lucky and had a couple carbs running close to 9 psi without the needle floating....if he is not having any issues at 9 psi then run it there...but at least try dropping to 7 psi and see if it runs better
fishman1 is offline  
Old 08-11-2007, 07:29 AM
  #6  
bjuice
Administrator
RACING JUNKIE
 
bjuice's Avatar
 
Join Date: Apr 2003
Location: Greenville s.c.
Posts: 3,236
Default

I would drop to 7lbs....reason being even though you see no effect on the needle seats now doesn't mean it cannot happen at any given moment...9 lbs will keep constant extra pressure on those needle seats..if it blows by the seat completey you will have a massive fuel over flow into the bowls ETC...or it could cause a fuel pressure Creep...the high pressure will keep seeping by the needle seat and cause you to load up,foul plugs etc...

go to 7lbs and do not worry about it..

you have a Great fuel pump by the way.....


thanks bRIAN
__________________
Bjuice..

"I'M YOUR HUCKLEBERRY ! "
bjuice is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -