1stGen.org

THE place for 1st gens

Skip to content

fuel pressure

How to make it go fast

Moderators: Greenleaf, KTA, BC847, Richie O

Post a reply

fuel pressure

Postby Tsbourne09 » Fri Oct 07, 2011 1:40 am

what is a good and safe fuel pressure to be running? raptor 150 btw. i have herd 10, 11, and 15?
93 D250- pump maxed, 3800 spring, hx35, denny T pump top, 7x.015 injectors, timing+, Coolertubz, raptor 150, boost nipple, 4" DP to 6" aussie stacks, built tranny, asa intake, DNR tps, more HP mods, isspro boost, fuel pressure, egt, tranny temp, 5k tach, chrome and powder coating here & there.
Not On Yet: 60#VS
http://s1130.photobucket.com/albums/m53 ... 20Uploads/
User avatar
Tsbourne09
fuel screw!!!!
 
Posts: 337
Joined: Sun Aug 14, 2011 8:56 pm
Top

Re: fuel pressure

Postby ahale2772 » Fri Oct 07, 2011 4:27 am

shoule be fine at 15
84 CCLB W350 project
94' W350 Dually, Diesel, Auto 1080HP/1980FTlbs
User avatar
ahale2772
14mm rotor
 
Posts: 2353
Joined: Tue Jul 21, 2009 9:43 am
Location: massachusetts
Top

Re: fuel pressure

Postby skilletky » Fri Oct 07, 2011 11:36 pm

mine stays at a constant 17 psi, have not had a problem yet.
92 d350, arp's, orings, 150lb springs, 4200 gsk ,ground pin ,64/71/14 ,ddp inj's, ats manifold, tim's tubez, ats trans, FASS, locker, timing + a tooth, bcdd intake

2001 2wd rclb dually 5sp, smarty, Bluechip FMS, TS MVP, 57/75 twins, stainless diesel pipe kit, valair clutch, airdog 150, DFI SAC 7x.014's, cheap a$$ intake, ARP studs, oringed head, CPP 115# springs
User avatar
skilletky
14mm rotor
 
Posts: 1070
Joined: Thu Jan 10, 2008 5:49 pm
Location: northern ky
Top

Re: fuel pressure

Postby Tsbourne09 » Thu Oct 13, 2011 12:53 pm

i had to send my isspro back because they sent black face and i ordered white so i stuck this mechanical one on for now. does this look right? it fluctuates ALOT!!!!! bounces 4-7 at idle? why? watch video and see
Image

http://s1130.photobucket.com/albums/m53 ... G_0423.mp4

http://s1130.photobucket.com/albums/m53 ... G_0423.mp4
93 D250- pump maxed, 3800 spring, hx35, denny T pump top, 7x.015 injectors, timing+, Coolertubz, raptor 150, boost nipple, 4" DP to 6" aussie stacks, built tranny, asa intake, DNR tps, more HP mods, isspro boost, fuel pressure, egt, tranny temp, 5k tach, chrome and powder coating here & there.
Not On Yet: 60#VS
http://s1130.photobucket.com/albums/m53 ... 20Uploads/
User avatar
Tsbourne09
fuel screw!!!!
 
Posts: 337
Joined: Sun Aug 14, 2011 8:56 pm
Top

Re: fuel pressure

Postby Tsbourne09 » Thu Oct 13, 2011 12:55 pm

the raptor 150 is NOT on yet btw
93 D250- pump maxed, 3800 spring, hx35, denny T pump top, 7x.015 injectors, timing+, Coolertubz, raptor 150, boost nipple, 4" DP to 6" aussie stacks, built tranny, asa intake, DNR tps, more HP mods, isspro boost, fuel pressure, egt, tranny temp, 5k tach, chrome and powder coating here & there.
Not On Yet: 60#VS
http://s1130.photobucket.com/albums/m53 ... 20Uploads/
User avatar
Tsbourne09
fuel screw!!!!
 
Posts: 337
Joined: Sun Aug 14, 2011 8:56 pm
Top

Re: fuel pressure

Postby BILTIT » Thu Oct 13, 2011 1:19 pm

Your reading with a stock mechanical pump will bounce wildy, a pressure snubber is needed to stop the fluctuations.
Derek B.
2003 QuadCab, Tater 62/65 341cw, Smarty Touch SW9, Full Billet trans.
91.5 W250, coolertubz, HE351CW, PS IC, Alcans, GVOD, Valair DD, bags, crossover.
1974 Pontiac Ventura,best of 11.97 at 112 so far.
Aluminum heads and roller cam on the way.
User avatar
BILTIT
14mm rotor
 
Posts: 711
Joined: Wed Aug 11, 2010 1:29 pm
Location: Lloydminster, Saskatchewan
Top

Re: fuel pressure

Postby Tsbourne09 » Thu Oct 13, 2011 2:13 pm

pressure snubber? what is that?
93 D250- pump maxed, 3800 spring, hx35, denny T pump top, 7x.015 injectors, timing+, Coolertubz, raptor 150, boost nipple, 4" DP to 6" aussie stacks, built tranny, asa intake, DNR tps, more HP mods, isspro boost, fuel pressure, egt, tranny temp, 5k tach, chrome and powder coating here & there.
Not On Yet: 60#VS
http://s1130.photobucket.com/albums/m53 ... 20Uploads/
User avatar
Tsbourne09
fuel screw!!!!
 
Posts: 337
Joined: Sun Aug 14, 2011 8:56 pm
Top

Re: fuel pressure

Postby BILTIT » Thu Oct 13, 2011 4:22 pm

Most just use a small valve which they can run just open enough to read the pressure but not enough to get the fluctuations.

Or you can try this:

http://www.genosgarage.com/prodinfo.asp ... LT-SNUBBER
Derek B.
2003 QuadCab, Tater 62/65 341cw, Smarty Touch SW9, Full Billet trans.
91.5 W250, coolertubz, HE351CW, PS IC, Alcans, GVOD, Valair DD, bags, crossover.
1974 Pontiac Ventura,best of 11.97 at 112 so far.
Aluminum heads and roller cam on the way.
User avatar
BILTIT
14mm rotor
 
Posts: 711
Joined: Wed Aug 11, 2010 1:29 pm
Location: Lloydminster, Saskatchewan
Top

Re: fuel pressure

Postby Tsbourne09 » Thu Oct 13, 2011 6:20 pm

Ow wow thanks!!! Will i still have to use a snubber when i get my electric guage?
93 D250- pump maxed, 3800 spring, hx35, denny T pump top, 7x.015 injectors, timing+, Coolertubz, raptor 150, boost nipple, 4" DP to 6" aussie stacks, built tranny, asa intake, DNR tps, more HP mods, isspro boost, fuel pressure, egt, tranny temp, 5k tach, chrome and powder coating here & there.
Not On Yet: 60#VS
http://s1130.photobucket.com/albums/m53 ... 20Uploads/
User avatar
Tsbourne09
fuel screw!!!!
 
Posts: 337
Joined: Sun Aug 14, 2011 8:56 pm
Top

Re: fuel pressure

Postby oldestof11 » Thu Oct 13, 2011 8:11 pm

Or leave lots of air in the line.
Jon
93 D250~ Mismatch of cheap parts, trying to look fast going slow
User avatar
oldestof11
14mm rotor
 
Posts: 4147
Joined: Tue Apr 24, 2007 4:46 pm
Location: Northern Illinois
Top

Re: fuel pressure

Postby Tsbourne09 » Thu Oct 13, 2011 8:19 pm

what does that do?
93 D250- pump maxed, 3800 spring, hx35, denny T pump top, 7x.015 injectors, timing+, Coolertubz, raptor 150, boost nipple, 4" DP to 6" aussie stacks, built tranny, asa intake, DNR tps, more HP mods, isspro boost, fuel pressure, egt, tranny temp, 5k tach, chrome and powder coating here & there.
Not On Yet: 60#VS
http://s1130.photobucket.com/albums/m53 ... 20Uploads/
User avatar
Tsbourne09
fuel screw!!!!
 
Posts: 337
Joined: Sun Aug 14, 2011 8:56 pm
Top

Re: fuel pressure

Postby Tsbourne09 » Thu Oct 13, 2011 8:55 pm

just ordered needle valve....
http://www.drillspot.com/products/41856 ... _Valve?s=1
93 D250- pump maxed, 3800 spring, hx35, denny T pump top, 7x.015 injectors, timing+, Coolertubz, raptor 150, boost nipple, 4" DP to 6" aussie stacks, built tranny, asa intake, DNR tps, more HP mods, isspro boost, fuel pressure, egt, tranny temp, 5k tach, chrome and powder coating here & there.
Not On Yet: 60#VS
http://s1130.photobucket.com/albums/m53 ... 20Uploads/
User avatar
Tsbourne09
fuel screw!!!!
 
Posts: 337
Joined: Sun Aug 14, 2011 8:56 pm
Top

Re: fuel pressure

Postby ahale2772 » Fri Oct 14, 2011 5:27 am

the only reason u need the isolator/ snubber is to keep the guage alive, not to smooth out the fuel pressure going to the IP. the electric will be a pretty constant pressure
84 CCLB W350 project
94' W350 Dually, Diesel, Auto 1080HP/1980FTlbs
User avatar
ahale2772
14mm rotor
 
Posts: 2353
Joined: Tue Jul 21, 2009 9:43 am
Location: massachusetts
Top

Re: fuel pressure

Postby Tsbourne09 » Mon Oct 17, 2011 9:49 am

Tsbourne09 wrote:just ordered needle valve....
http://www.drillspot.com/products/41856 ... _Valve?s=1



dont order this needle valve! got this in today and it leaks at the lock nut. :mad:
93 D250- pump maxed, 3800 spring, hx35, denny T pump top, 7x.015 injectors, timing+, Coolertubz, raptor 150, boost nipple, 4" DP to 6" aussie stacks, built tranny, asa intake, DNR tps, more HP mods, isspro boost, fuel pressure, egt, tranny temp, 5k tach, chrome and powder coating here & there.
Not On Yet: 60#VS
http://s1130.photobucket.com/albums/m53 ... 20Uploads/
User avatar
Tsbourne09
fuel screw!!!!
 
Posts: 337
Joined: Sun Aug 14, 2011 8:56 pm
Top

Re: fuel pressure

Postby Tsbourne09 » Mon Oct 17, 2011 9:50 am

BILTIT wrote:Most just use a small valve which they can run just open enough to read the pressure but not enough to get the fluctuations.

Or you can try this:

http://www.genosgarage.com/prodinfo.asp ... LT-SNUBBER



will this work fine?
93 D250- pump maxed, 3800 spring, hx35, denny T pump top, 7x.015 injectors, timing+, Coolertubz, raptor 150, boost nipple, 4" DP to 6" aussie stacks, built tranny, asa intake, DNR tps, more HP mods, isspro boost, fuel pressure, egt, tranny temp, 5k tach, chrome and powder coating here & there.
Not On Yet: 60#VS
http://s1130.photobucket.com/albums/m53 ... 20Uploads/
User avatar
Tsbourne09
fuel screw!!!!
 
Posts: 337
Joined: Sun Aug 14, 2011 8:56 pm
Top
Next
Post a reply

Return to The good stuff

Who is online

Users browsing this forum: No registered users and 25 guests

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
cron