Fuel pressure - GM Forum - Buick, Cadillac, Olds, GMC & Pontiac chat

Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)
Sponsored By:
Sponsored By:

Fuel pressure

Reply

 
 
 
Old 02-21-2012, 01:57 PM
  #1  
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
63viking's Avatar
 
Join Date: Mar 2008
Location: N W Illinois
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
63viking is on a distinguished road
Smile Fuel pressure

I know some of you guys have done this but I'm wondering what you can use to eliminate the stock fuel pressure regulator that is attached to the fuel rail. I want to run higher pressure for my supercharger. This is on a 1990 Buick Reatta w/ stage 1 supercharger.
The engine has been rebuilt with HD parts for the supercharger an blue printed and balanced. Can some one help me, Please.
Jon..
63viking is offline  
Reply With Quote
Old 02-21-2012, 04:33 PM
  #2  
Senior Member
True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,808
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Are you sure you want to eliminate the stock FPR? Vacuum controls fuel pressure. At idle with maximum vacuum you have minimum fuel pressure. At WOT on a non-boosted engine you have maximum fuel pressure. Adding boost to the intake also adds positive pressure to the diaphram in the FPR and increases fuel pressure even further. You may not have to modify the stock FPR.
2kg4u is offline  
Reply With Quote
Old 02-21-2012, 04:42 PM
  #3  
Senior Administrator



Certified Car Nut
 
Join Date: Jul 2003
Location: Dark Side, NY
Posts: 16,099
Thanked 1,170 Times in 885 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

Even if he was able to run higher pressure, wouldn't he still have to upgrade his injectors?
__________________
2002 S10 V8
Please do NOT PM technical questions
Please do not reply to posts older than 6 months
Mike is online now  
Reply With Quote
Old 02-21-2012, 05:36 PM
  #4  
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
63viking's Avatar
 
Join Date: Mar 2008
Location: N W Illinois
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
63viking is on a distinguished road
Default

I have upgraded my fuel injectors to 37#. I wish to run at least #50lbs of pressure.
63viking is offline  
Reply With Quote
Old 02-21-2012, 06:20 PM
  #5  
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
63viking's Avatar
 
Join Date: Mar 2008
Location: N W Illinois
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
63viking is on a distinguished road
Default

I also have an external adjustable fuel pressure regulator in line. That'* why I wish to remove the stock FPR.
Jon..
63viking is offline  
Reply With Quote
Old 02-21-2012, 06:34 PM
  #6  
Senior Administrator



Certified Car Nut
 
Join Date: Jul 2003
Location: Dark Side, NY
Posts: 16,099
Thanked 1,170 Times in 885 Posts
Mike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond reputeMike has a reputation beyond repute
Default

I'm going to move this to Performance and Brainstorming for better visibility.
__________________
2002 S10 V8
Please do NOT PM technical questions
Please do not reply to posts older than 6 months
Mike is online now  
Reply With Quote
Old 02-22-2012, 08:10 AM
  #7  
Senior Member
True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,808
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Originally Posted by Mike1995 View Post
Even if he was able to run higher pressure, wouldn't he still have to upgrade his injectors?
Yes, he definitely has to upgrade the injectors. In all likelihood he also needs a high pressure fuel pump or a double fuel pump set up.
2kg4u is offline  
Reply With Quote
Old 02-22-2012, 08:13 AM
  #8  
Senior Member
True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,808
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

Originally Posted by 63viking View Post
I have upgraded my fuel injectors to 37#. I wish to run at least #50lbs of pressure.
Is the engine currently boosted? What pressure? How much do you anticipate increasing boost? 37# injectors seem quite low.
2kg4u is offline  
Reply With Quote
Old 02-22-2012, 10:36 AM
  #9  
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Since you have an aftermarket FPR and appear to understand what you are doing, I'd think the best way to do it would be to look at plugging the existing hole where the FPR is located. Assuming you are using the external before the fuel rail.
BillBoost37 is offline  
Reply With Quote
Old 02-22-2012, 11:06 AM
  #10  
Junior Member
Posts like a Ricer Type-R
Thread Starter
 
63viking's Avatar
 
Join Date: Mar 2008
Location: N W Illinois
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
63viking is on a distinguished road
Default

Yes the engine is boosted. Fresh M62 w/ 2" pulley and an electric vacumn control for the blow-off. I get 9# boost at 3000rpm, just bliping the throttle. I don't know what the total will be under load yet. The standard */C 3800 engine has only 34# injectors.
How big should I try?
63viking is offline  
Reply With Quote
Reply
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
reb
1992-1999
22
12-13-2015 06:40 PM
ccotten
1992-1999
13
07-25-2007 05:28 PM
trigga_b
1992-1999
26
05-22-2006 10:18 AM
Rich97bonny
1992-1999
5
10-18-2005 01:26 PM
mikeblue94
1992-1999
8
10-31-2004 03:20 PM


Thread Tools
Search this Thread