Fuel pump flow
Thread Starter
Racer
Joined: Oct 2004
Posts: 370
Likes: 1
From: Tracy CA
Fuel pump flow
Does anyone know what the actual Liters or gallons per hour the stock fuel pump flows in our cars (mine's an '01 Z if there's different units).
I've only been able to find one post where the responder *thought* it was 190 gph. Just trying to confirm one way or another.
I'm sure it's out there somewhere, I've tried searching here and Google but having no luck. Gonna try the local dealer Monday if nothing else.
Thank you,
-Rick
I've only been able to find one post where the responder *thought* it was 190 gph. Just trying to confirm one way or another.
I'm sure it's out there somewhere, I've tried searching here and Google but having no luck. Gonna try the local dealer Monday if nothing else.
Thank you,
-Rick
Drifting
Joined: Sep 2009
Posts: 1,719
Likes: 4
From: cinnaminson n.j.
St. Jude Donor '14
Are you having a running problem? As far as I know, the stock pumps can support 450 na rwhp. GM cars have had problems with voltage drops to the fuel pumps.
If Bill sees this I'm sure he will have some good info for you.
If Bill sees this I'm sure he will have some good info for you.
Thread Starter
Racer
Joined: Oct 2004
Posts: 370
Likes: 1
From: Tracy CA
Fuel pump flow rate
My stock pump with 42# injectors seems to have worked fine with my 383's ~500rwhp. I'm hoping my new motor will have a little bit more hp/tq.
So, I'm not looking for "the factory pump will support xyz hp", which is all I've been able to find. I just want to know what the stock fuel pump's flow rating is.
Anyone?
Thank you,
-Rick
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
I couldn't find a flow spec for the stock pump in the service manual but I did read through the fuel system diagnosis that lists the desired pressure and flow rates in testing procedures to determine if the pump is good. The spec is 300 ml in 10 seconds which works out to 108 lph.
Drifting
Joined: Jan 2006
Posts: 1,726
Likes: 97
From: Castro Valley State of Insanity
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
That's just a calculation based on what the manual says is needed for normal operation. Max flow spec is probably higher.
Thread Starter
Racer
Joined: Oct 2004
Posts: 370
Likes: 1
From: Tracy CA
I couldn't find a flow spec for the stock pump in the service manual but I did read through the fuel system diagnosis that lists the desired pressure and flow rates in testing procedures to determine if the pump is good. The spec is 300 ml in 10 seconds which works out to 108 lph.
Just wanted to say "thank you" for looking into this for me. I checked with a local dealer as well and was told he couldn't find an actual spec. for this either.
It would be nice to know exactly how much more flow the Lingenfelter pump kit or Racetronix kits flow over stock...?
Thanks again,
-Rick
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Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
The procedure is based on using a Tech 2 to initiate 10 seconds of flow with the ignition on but engine not running and having the gasoline run from the pump into a container. The volume is then measured and compared to the min. 300 ml volume to determine if sufficinet flow exists. Not a highly controlled test but good enough to determine if the pump is flowing adequately and probably accurate to a few % points. Given all the specs the SM has, I'm a little surprised this one was left out.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Hi Patches-
Just wanted to say "thank you" for looking into this for me. I checked with a local dealer as well and was told he couldn't find an actual spec. for this either.
It would be nice to know exactly how much more flow the Lingenfelter pump kit or Racetronix kits flow over stock...?
Thanks again,
-Rick
Just wanted to say "thank you" for looking into this for me. I checked with a local dealer as well and was told he couldn't find an actual spec. for this either.
It would be nice to know exactly how much more flow the Lingenfelter pump kit or Racetronix kits flow over stock...?
Thanks again,
-Rick
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
I thought the flow was measured on the return line going into the jet or siphon pump which would mean it's the fuel flow under pressure. You then also measure after the jet pump to ensure the jet pump is moving fuel to the other tank.
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
Here's the instruction sequence from the SM:
1. Add fuel to the left fuel tank.
2. Disconnect the auxiliary fuel feed rear pipe from the right fuel sender. Refer to Fuel Hose/Pipes Assembly Replacement .
3. Insert the auxiliary fuel feed rear pipe into an approved gasoline container.
Important
You may need to command the fuel pump ON a few times in order to obtain the specified time limit.
4. Command the fuel pump ON for the specified time with a scan tool.
5. Measure the volume of fuel.
Is the volume of fuel greater than the specified value?
Value
10 seconds
300 ml (0.633 pt)
1. Add fuel to the left fuel tank.
2. Disconnect the auxiliary fuel feed rear pipe from the right fuel sender. Refer to Fuel Hose/Pipes Assembly Replacement .
3. Insert the auxiliary fuel feed rear pipe into an approved gasoline container.
Important
You may need to command the fuel pump ON a few times in order to obtain the specified time limit.
4. Command the fuel pump ON for the specified time with a scan tool.
5. Measure the volume of fuel.
Is the volume of fuel greater than the specified value?
Value
10 seconds
300 ml (0.633 pt)
Thread Starter
Racer
Joined: Oct 2004
Posts: 370
Likes: 1
From: Tracy CA
-Rick