K5 Blazer Forums  
Home of the 1969-91 K5 Blazer/Jimmy including GM Trucks and Suburbans.  
Go Back   CK5 Forums > Technical Discussion > The Injection Section

Remove these ads.

View Poll Results: best reulator setup for uping the fuel psi
fixed psi spring 1 16.67%
mech adjustable reg base kit 2 33.33%
manifold ref modification 0 0%
mech adjustable base AND aftermarket spring 3 50.00%
Voters: 6. You may not vote on this poll

Reply
 
Thread Tools Display Modes
Old 12-16-2011, 04:47 AM
Posted in reply to eagle mark's post starting "I'm not sure this would be the right..."
  #11
sweetk30
Supporting Member
web wheelin for now
 
sweetk30's Avatar
 
Join Date: Nov 2004
Location: 14845 zip code
Posts: 22,506

i Trader: (57 )

ya that uses a shrader valv with diffrent threads.

the autometer eletric uses a 1/8 pipe thread on the sender.
__________________

2wd resto mod 5.3/4l60e powered : http://coloradok5.com/forums/showthread.php?t=296680
stubby j.r. : http://coloradok5.com/forums/showthread.php?t=309865
project stubby crew cab : http://coloradok5.com/forums/showthread.php?t=245582
diy4x custom dash : http://coloradok5.com/forums/showthread.php?t=284383
snap-on tool box : http://coloradok5.com/forums/showthread.php?t=225524
. . .WHEN I WAN'T YOUR OPINION I WILL REMOVE THE DUCT TAPE ! ! !
sweetk30 is offline   Reply With Quote
Sponsored Links



Remove these ads.
Old 12-16-2011, 09:46 AM
Posted in reply to sweetk30's post starting "ya that uses a shrader valv with..."
  #12
eagle mark
CK5 Staff
 
eagle mark's Avatar
 
Join Date: Nov 2004
Location: North Idaho!
Posts: 3,272

i Trader: (1 )

IIRC one of those adapters you need or listed have one hole for gauge and 2 holes for gauges! Or I have seen them with one or two.

If it were me I would like the two hole to have a gauge hard mounted on back of TBI for checking while idling under hood or when setting adjustable regulator. Then the other to gauge in cab to watch fuel pressure. Mainly what the in cab fuel pressure gauge is for is making sure fuel pressure is not dropping (supplying enough fuel) at WOT high RPM.

WARNING: Please always use a proper electronic fuel pressure sender to send signal into passenger compartment! Do not ever run a mechanical pressure gauge with flammable fuel into passenger compartment like you can with oil pressure...
__________________
1990 Chevy Suburban 5.7L TBI ECM 1227747 HiWay Lean Cruise!
1998 Chevy Silverado 5.7L Vortec RoadRunner Lean Cruise!
CK5 Injection Section
GearHead-EFI.com
eagle mark is offline   Reply With Quote
Old 12-21-2011, 06:03 AM
Posted in reply to 4X4HIGH's post starting "The pressure spring will do you no good..."
  #13
cuervo
Supporting Member
Registered User
 
cuervo's Avatar
 
Join Date: Jan 2004
Location: Sweet Home Alabama!
Posts: 2,879

i Trader: (2 )

Quote:
Originally Posted by 4X4HIGH View Post
The pressure spring will do you no good until you have an adjustable regulator.

Well, I put in a stiffer spring with the stock regulator and was got the pressure to 18 psi. In fact, I tried two different stiffer springs and the second one put it at 20 psi.

That ended up being too much pressure so I changed back to a stock spring and adjustable regulator to get 15 psi.
__________________
-Tim

Quote:
Originally Posted by supersize75k5

****ing pisses me off. The direction of thought should be to get the sherriff involved, not your ****ing tool box.
cuervo is offline   Reply With Quote
Old 12-21-2011, 10:05 AM
Posted in reply to cuervo's post starting "Well, I put in a stiffer spring with..."
  #14
eagle mark
CK5 Staff
 
eagle mark's Avatar
 
Join Date: Nov 2004
Location: North Idaho!
Posts: 3,272

i Trader: (1 )

Has anyone ever tried to see how far up a stock spring will go with adjustable regulator?
__________________
1990 Chevy Suburban 5.7L TBI ECM 1227747 HiWay Lean Cruise!
1998 Chevy Silverado 5.7L Vortec RoadRunner Lean Cruise!
CK5 Injection Section
GearHead-EFI.com
eagle mark is offline   Reply With Quote
Old 12-21-2011, 03:44 PM
Posted in reply to eagle mark's post starting "Has anyone ever tried to see how far up..."
  #15
sweetk30
Supporting Member
web wheelin for now
 
sweetk30's Avatar
 
Join Date: Nov 2004
Location: 14845 zip code
Posts: 22,506

i Trader: (57 )

Quote:
Originally Posted by eagle mark View Post
Has anyone ever tried to see how far up a stock spring will go with adjustable regulator?
i am going to modify my factory unit for adjustable. then we will see mabye

and i ordered the adaptor fitting from r.v.machine link i posted and its on its way at the price listed.
__________________

2wd resto mod 5.3/4l60e powered : http://coloradok5.com/forums/showthread.php?t=296680
stubby j.r. : http://coloradok5.com/forums/showthread.php?t=309865
project stubby crew cab : http://coloradok5.com/forums/showthread.php?t=245582
diy4x custom dash : http://coloradok5.com/forums/showthread.php?t=284383
snap-on tool box : http://coloradok5.com/forums/showthread.php?t=225524
. . .WHEN I WAN'T YOUR OPINION I WILL REMOVE THE DUCT TAPE ! ! !
sweetk30 is offline   Reply With Quote
Old 12-21-2011, 08:05 PM
Posted in reply to eagle mark's post starting "Has anyone ever tried to see how far up..."
  #16
4X4HIGH
Supporting Member
Registered User
 
4X4HIGH's Avatar
 
Join Date: Dec 2001
Location: Pleasanton, CA.
Posts: 21,495

i Trader: (20 )

GM of the month Winner
Quote:
Originally Posted by eagle mark View Post
Has anyone ever tried to see how far up a stock spring will go with adjustable regulator?
You cannot get more than around 14-15psi with the stock spring and fuel pump.
__________________
1989 blazer, 350/700R4/NP241, 8" lift, D60/14FF w/4.56's and Detroits, hydro assist, 35" BFG Mud
Scott
4X4HIGH is offline   Reply With Quote
Old 12-21-2011, 08:45 PM
Posted in reply to 4X4HIGH's post starting "You cannot get more than around..."
  #17
eagle mark
CK5 Staff
 
eagle mark's Avatar
 
Join Date: Nov 2004
Location: North Idaho!
Posts: 3,272

i Trader: (1 )

Quote:
Originally Posted by 4X4HIGH View Post
You cannot get more than around 14-15psi with the stock spring and fuel pump.
Is that because of the pump or spring though?

I don't think it's the pump because guys put springs in adjustable regulators without a pump change? But how far up PSI it will go I don't know?

I know a stock spring in an adjustable regulator with TPI pump can hit 17 PSI cause I did one... and at first it was 20PSI...

So I guess I'll rephrase the question to how high the fuel pressure can go with stock spring, stock TBI pump and an adjustable regulator? If anyone has done one and tried the max PSI? Just curious...
__________________
1990 Chevy Suburban 5.7L TBI ECM 1227747 HiWay Lean Cruise!
1998 Chevy Silverado 5.7L Vortec RoadRunner Lean Cruise!
CK5 Injection Section
GearHead-EFI.com
eagle mark is offline   Reply With Quote
Old 12-21-2011, 08:51 PM
Posted in reply to eagle mark's post starting "Is that because of the pump or spring..."
  #18
4X4HIGH
Supporting Member
Registered User
 
4X4HIGH's Avatar
 
Join Date: Dec 2001
Location: Pleasanton, CA.
Posts: 21,495

i Trader: (20 )

GM of the month Winner
Quote:
Originally Posted by eagle mark View Post
Is that because of the pump or spring though?

I don't think it's the pump because guys put springs in adjustable regulators without a pump change? But how far up PSI it will go I don't know?

I know a stock spring in an adjustable regulator with TPI pump can hit 17 PSI cause I did one... and at first it was 20PSI...

So I guess I'll rephrase the question to how high the fuel pressure can go with stock spring, stock TBI pump and an adjustable regulator? If anyone has done one and tried the max PSI? Just curious...
I tried this with mine and I was only able to get just above 14psi, probably like 14.5psi. I then installed an 18psi spring and could still only get 15psi so I finally installed a higher pressure pump and i'm now running 18psi with my 454 TBI with 90 lb/hr injectors.
__________________
1989 blazer, 350/700R4/NP241, 8" lift, D60/14FF w/4.56's and Detroits, hydro assist, 35" BFG Mud
Scott
4X4HIGH is offline   Reply With Quote
Old 12-22-2011, 12:53 PM
Posted in reply to 4X4HIGH's post starting "I tried this with mine and I was only..."
  #19
cuervo
Supporting Member
Registered User
 
cuervo's Avatar
 
Join Date: Jan 2004
Location: Sweet Home Alabama!
Posts: 2,879

i Trader: (2 )

I don't know if a stock pump will push more pressure with a stiffer spring. When I changed my spring I had already went with a higher pressure/volume pump.
__________________
-Tim

Quote:
Originally Posted by supersize75k5

****ing pisses me off. The direction of thought should be to get the sherriff involved, not your ****ing tool box.
cuervo is offline   Reply With Quote
Old 12-22-2011, 01:41 PM
Posted in reply to cuervo's post starting "I don't know if a stock pump will push..."
  #20
sweetk30
Supporting Member
web wheelin for now
 
sweetk30's Avatar
 
Join Date: Nov 2004
Location: 14845 zip code
Posts: 22,506

i Trader: (57 )

got my adaptor fast delivery via usps flat rate box .

big to r.v.morise machine co. for the deal and fast shipping. and 11 bucks cheeper than cfm-tec for the same item.

also thay give you a nice small tight 90* fitting for tight clearence areas if you need it.

hope to ge it installed this weekend and the gauge also.
Attached Images
File Type: jpg 1222111635a.jpg (214.4 KB, 5 views)
__________________

2wd resto mod 5.3/4l60e powered : http://coloradok5.com/forums/showthread.php?t=296680
stubby j.r. : http://coloradok5.com/forums/showthread.php?t=309865
project stubby crew cab : http://coloradok5.com/forums/showthread.php?t=245582
diy4x custom dash : http://coloradok5.com/forums/showthread.php?t=284383
snap-on tool box : http://coloradok5.com/forums/showthread.php?t=225524
. . .WHEN I WAN'T YOUR OPINION I WILL REMOVE THE DUCT TAPE ! ! !
sweetk30 is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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

Forum Jump


All times are GMT -7. The time now is 04:50 AM.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.