Weber fuel pressure regulator question
-
- Highest Ranking Member
- Posts: 1626
- Joined: Thu Apr 01, 2004 9:14 am
- Location: Victoria BC, Canada
Weber fuel pressure regulator question
Hey guys, not sure if someone can help or not. Basically I'm trying to source a 4psi fuel pressure regulator to go with my Weber 32/36 DGEV. The tercel's fuel pump/pressure regulator feeds about 7psi into the Weber, but the Weber is designed to only run about 3-3.5psi. I understand that the 7psi can damage seals etc. after a period of time.
This fuel pressure regulator here looks suitable to me:
http://cgi.ebay.com/ebaymotors/Redline- ... enameZWDVW
Think it would work? Any ideas?
Nick
This fuel pressure regulator here looks suitable to me:
http://cgi.ebay.com/ebaymotors/Redline- ... enameZWDVW
Think it would work? Any ideas?
Nick
Current:
91 LJ78 Landcruiser EX5
95 A32 Maxima SE
Former:
87 AW11 MR2 Smallport 4AGZE
93 Taurus SHO ATX
86 AL25 SR5 6spd 4wd
90 AE92 GTS
82 KP61 SR5
85 MX73
87 AE86 GTS 4AGZE
85 AE86 GTS
83 AL21
91 LJ78 Landcruiser EX5
95 A32 Maxima SE
Former:
87 AW11 MR2 Smallport 4AGZE
93 Taurus SHO ATX
86 AL25 SR5 6spd 4wd
90 AE92 GTS
82 KP61 SR5
85 MX73
87 AE86 GTS 4AGZE
85 AE86 GTS
83 AL21
-
- Highest Ranking Member
- Posts: 1626
- Joined: Thu Apr 01, 2004 9:14 am
- Location: Victoria BC, Canada
I originally thought this too. I've just recently read that Weber Redline HIGHLY recommends only 3-3.5psi for the carb. They say that it'll damage seals after a while otherwise. For $35 it's probably worth just installing one.Mac wrote:I dunno how damaging it would be..
the pump supplies fuel to the carb and the float raises up and down, when it goes up it plugs the hole and makes the fuel bypass the carb and go back to the tank.
the only thing that could potentially be damaged is the needle that the float controls
Current:
91 LJ78 Landcruiser EX5
95 A32 Maxima SE
Former:
87 AW11 MR2 Smallport 4AGZE
93 Taurus SHO ATX
86 AL25 SR5 6spd 4wd
90 AE92 GTS
82 KP61 SR5
85 MX73
87 AE86 GTS 4AGZE
85 AE86 GTS
83 AL21
91 LJ78 Landcruiser EX5
95 A32 Maxima SE
Former:
87 AW11 MR2 Smallport 4AGZE
93 Taurus SHO ATX
86 AL25 SR5 6spd 4wd
90 AE92 GTS
82 KP61 SR5
85 MX73
87 AE86 GTS 4AGZE
85 AE86 GTS
83 AL21
-
- Highest Ranking Member
- Posts: 1626
- Joined: Thu Apr 01, 2004 9:14 am
- Location: Victoria BC, Canada
Hmmm...so you're saying I'd be best off just installing an electric pump and regulator? Or...maybe less volume = better fuel economy? Means the engine might lean out a bit, but thats ok, I think it's running a little on the rich side anyhow.zipty842 wrote:A pressure regulator will also cut volume, which is what a weber really needs. Also, mechanical fuel pumps pulsate when they pumpand webers work best with constant pressure.
Current:
91 LJ78 Landcruiser EX5
95 A32 Maxima SE
Former:
87 AW11 MR2 Smallport 4AGZE
93 Taurus SHO ATX
86 AL25 SR5 6spd 4wd
90 AE92 GTS
82 KP61 SR5
85 MX73
87 AE86 GTS 4AGZE
85 AE86 GTS
83 AL21
91 LJ78 Landcruiser EX5
95 A32 Maxima SE
Former:
87 AW11 MR2 Smallport 4AGZE
93 Taurus SHO ATX
86 AL25 SR5 6spd 4wd
90 AE92 GTS
82 KP61 SR5
85 MX73
87 AE86 GTS 4AGZE
85 AE86 GTS
83 AL21
actually, the carter pump noted above without a regulator is the recommended pump for webers. filling the float bowl at a slower rate isnt gonna use any less fuel either, because the rate of fuel consumption is based on vacuum pull through the carb.
1986 Tercel 4WD SR5
1985 MR2
1983 Celica GT-S
1993 Toyota 2WD pickup "HILUX GT"
1985 MR2
1983 Celica GT-S
1993 Toyota 2WD pickup "HILUX GT"
Less pressure really doesn't mean less volume....
At any rate, if there were a pressure regulator, I'd imagine it would smooth out the pulses significantly?
It will leak with too much pressure. Someone on here with one noted seeing that.
At any rate, if there were a pressure regulator, I'd imagine it would smooth out the pulses significantly?
It will leak with too much pressure. Someone on here with one noted seeing that.
RIP 10-07- 1984 Toyota Tercel SR5 4wd Wagen 6 speed
RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed
1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed
1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew
RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed
1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed
1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew
basically the way a pressure regulator works is by making the fuel line smaller here is a good source for weber info http://www.racetep.com/webtechpage.html
i will note that my dad has used webers for years with the factory toyota fuel pumps with out any problems. on models ranging from starlets to 4wd pickups.
i will note that my dad has used webers for years with the factory toyota fuel pumps with out any problems. on models ranging from starlets to 4wd pickups.
1986 Tercel 4WD SR5
1985 MR2
1983 Celica GT-S
1993 Toyota 2WD pickup "HILUX GT"
1985 MR2
1983 Celica GT-S
1993 Toyota 2WD pickup "HILUX GT"
-
- Highest Ranking Member
- Posts: 1626
- Joined: Thu Apr 01, 2004 9:14 am
- Location: Victoria BC, Canada
Thanks for all the advice guys. I'm really not a carb knowledgable person, I'm more of an efi type guy. OK, so I'm basically best off buying the carter pump that shogun uses, and not buying a regulator at all? I think I'll look into this. Thanks again!
Current:
91 LJ78 Landcruiser EX5
95 A32 Maxima SE
Former:
87 AW11 MR2 Smallport 4AGZE
93 Taurus SHO ATX
86 AL25 SR5 6spd 4wd
90 AE92 GTS
82 KP61 SR5
85 MX73
87 AE86 GTS 4AGZE
85 AE86 GTS
83 AL21
91 LJ78 Landcruiser EX5
95 A32 Maxima SE
Former:
87 AW11 MR2 Smallport 4AGZE
93 Taurus SHO ATX
86 AL25 SR5 6spd 4wd
90 AE92 GTS
82 KP61 SR5
85 MX73
87 AE86 GTS 4AGZE
85 AE86 GTS
83 AL21
If you're going to buy one, here is what Weber recommends. http://www.racetep.com/webfuelspark.html#webfuel
RIP 10-07- 1984 Toyota Tercel SR5 4wd Wagen 6 speed
RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed
1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed
1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew
RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed
1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed
1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew
-
- Highest Ranking Member
- Posts: 1626
- Joined: Thu Apr 01, 2004 9:14 am
- Location: Victoria BC, Canada
Good link Typrus; thanks! I'll look into that. It think that is definitely the way I should go. Sounds like the tercel's fuel pump is a POS as far as webers are concerned. I'll be interested to see how this affects fuel economy.Typrus wrote:If you're going to buy one, here is what Weber recommends. http://www.racetep.com/webfuelspark.html#webfuel
Current:
91 LJ78 Landcruiser EX5
95 A32 Maxima SE
Former:
87 AW11 MR2 Smallport 4AGZE
93 Taurus SHO ATX
86 AL25 SR5 6spd 4wd
90 AE92 GTS
82 KP61 SR5
85 MX73
87 AE86 GTS 4AGZE
85 AE86 GTS
83 AL21
91 LJ78 Landcruiser EX5
95 A32 Maxima SE
Former:
87 AW11 MR2 Smallport 4AGZE
93 Taurus SHO ATX
86 AL25 SR5 6spd 4wd
90 AE92 GTS
82 KP61 SR5
85 MX73
87 AE86 GTS 4AGZE
85 AE86 GTS
83 AL21
Too much pressure can overload the float controlled valve...causing periods of high fuel levels? This would cause excess fuel use during idle and cruise?
Give a boy a gun-give a biatch a cell phone-and pretty soon you almost got yourself a police state.
Orwell said: War is peace! Freedom is slavery. Ignorance is strength...
![Image](http://www.nonags.org/members/nijqk/t4wd4.jpg)
Orwell said: War is peace! Freedom is slavery. Ignorance is strength...
![Image](http://www.nonags.org/members/nijqk/t4wd4.jpg)
-
- Highest Ranking Member
- Posts: 1626
- Joined: Thu Apr 01, 2004 9:14 am
- Location: Victoria BC, Canada
Thats sort of along the lines I was thinking. Course as I mentioned, I really don't know much about carbs. Ah well, we'll see what happens I guess. Once I have the MR2 on the road 100%, then I'll pull the terc aside and do some work on it (including this fuel issue).takza wrote:Too much pressure can overload the float controlled valve...causing periods of high fuel levels? This would cause excess fuel use during idle and cruise?
Current:
91 LJ78 Landcruiser EX5
95 A32 Maxima SE
Former:
87 AW11 MR2 Smallport 4AGZE
93 Taurus SHO ATX
86 AL25 SR5 6spd 4wd
90 AE92 GTS
82 KP61 SR5
85 MX73
87 AE86 GTS 4AGZE
85 AE86 GTS
83 AL21
91 LJ78 Landcruiser EX5
95 A32 Maxima SE
Former:
87 AW11 MR2 Smallport 4AGZE
93 Taurus SHO ATX
86 AL25 SR5 6spd 4wd
90 AE92 GTS
82 KP61 SR5
85 MX73
87 AE86 GTS 4AGZE
85 AE86 GTS
83 AL21