FUEL PUMPS.... keep'em pumping!
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Member
Joined: Apr 2000
Posts: 203
Likes: 0
From: FLA (US) & PTY
Car: Z-28
Engine: 355
Transmission: T-56
Axle/Gears: Stock
FUEL PUMPS.... keep'em pumping!
I have a 87 chevy camaro... from my signature you can see what engine I have now. So far I have run the stock mechanical pump. But I have been thinking of changing it. THe problem is that the pump have three ports. The extra one is supposed to be for emissions. I also hear that the my card has and extra electric pump in the tank (previous L69) I have been thinking of puitting and aftermarket pump. The question is :
What do I do with that extra (third) port that goes on the mechanical fuel pump. I am understand that the mechanical pumpt only have an inlet and outlet, and no third port for emissions. Can I just plug it?
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1987 Z-28 Camaro
GM ZZ3 Short Block
ZZ3 Cam (208 int, 221 exh, 112 LB)
Trick Flow Twisted Wedge heads (62cc)
Crane roller Rockers (1.6 ratio)
Edelbrock Performer intake
Edelbrock T.E.S Headers (wrapped)
3" American thunder Flowmaster catback
Borg & Wagner retrofit T-56
Mallory Comp 9000 Electronic Unlite Vacuum Advance distributor
Mallory Hyfire V1 (7) Cd electronic ignition
check it out (the engine): www.thirdgen.org/rides/index.tgo?action=view&rideid=3760
What do I do with that extra (third) port that goes on the mechanical fuel pump. I am understand that the mechanical pumpt only have an inlet and outlet, and no third port for emissions. Can I just plug it?
------------------
1987 Z-28 Camaro
GM ZZ3 Short Block
ZZ3 Cam (208 int, 221 exh, 112 LB)
Trick Flow Twisted Wedge heads (62cc)
Crane roller Rockers (1.6 ratio)
Edelbrock Performer intake
Edelbrock T.E.S Headers (wrapped)
3" American thunder Flowmaster catback
Borg & Wagner retrofit T-56
Mallory Comp 9000 Electronic Unlite Vacuum Advance distributor
Mallory Hyfire V1 (7) Cd electronic ignition
check it out (the engine): www.thirdgen.org/rides/index.tgo?action=view&rideid=3760
Member
Joined: Feb 2001
Posts: 140
Likes: 0
From: Muskegon, MI
Fulo, exactly the question that I've been searching for the last couple of hours.
My car is also an 87 that came with the LG4, so it has the in-tank fuel pump for the carb version. I will be by-passing the ECM with my new engine set-up as well and I'm curious if the in-tank pump operates independently of the ECM.
I'm thinking that it would be best to keep the tank pump operational as a helper to the mechanical pump and therefore more efficent.
I have mounted on my engine now (still on the stand) an Edelbrock #1721 HP Street pump with just the two ports.
What to do with that damm return line? or am I better off switching back to the old Carter 3-port pump?
LOL.
My car is also an 87 that came with the LG4, so it has the in-tank fuel pump for the carb version. I will be by-passing the ECM with my new engine set-up as well and I'm curious if the in-tank pump operates independently of the ECM.
I'm thinking that it would be best to keep the tank pump operational as a helper to the mechanical pump and therefore more efficent.
I have mounted on my engine now (still on the stand) an Edelbrock #1721 HP Street pump with just the two ports.
What to do with that damm return line? or am I better off switching back to the old Carter 3-port pump?
LOL.
Joined: Jul 1999
Posts: 1,272
Likes: 2
From: Muskego, WI
Car: 1985 Trans Am
Engine: 350
Transmission: T5
Axle/Gears: 3.70
Just plug the return line. You don't need to use it with most aftermarket pumps.
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1985 ASCD Ram Air Trans Am
Readers Ride at https://www.thirdgen.org/rides/index...ew&rideid=1067
-=ICON Motorsports=-
" I get drunk, I race cars and I fondle women. But... I have weekends off and I am my own boss"
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1985 ASCD Ram Air Trans Am
Readers Ride at https://www.thirdgen.org/rides/index...ew&rideid=1067
-=ICON Motorsports=-
" I get drunk, I race cars and I fondle women. But... I have weekends off and I am my own boss"
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