Home page
SPONSOR AD

Support our Vendors!  |  Advertise Here

Topic: Fuel Pump

in Forum: C3 Fuel, Emission Control, and Exhaust Systems


Already a Member?
Login
Not yet a Member?
Register for Free!

Back to top of thread

Fuel Pump (11/21)
 2/14/11 1:38pm
CCasey
Former Member

Send Private Message

New Albany, OH - USA

Vette(s):
1980 Coupe / Snowcrest White / L48, 350 / Comp Cam / Edelbrock Heads / Cyclone Intake / Holley Carb / Holley Fuel Pump / Patriot Headers / Dual Exhaust / Magnaflow Mufflers / 1964 Coupe / Riverside Red / L76, 327, 365hp


Joined: 8/17/2010
Posts: 173

Last year I had some significant upgrades done to my L48, 350.  Installed Edelbrock E-Street aluminum heads; Holley 770-cfm Street Avenger carb; Patriot tight-tuck headers; Comp Cam hudraulic roller cam; Cyclone-plus dual intake manifold.  CR now measures 9.7:1. 

My problem is that when I am at cruising speed (40 - 60 mph) and I stand on it, the engine immediately bogs-down.  If I just press the accelerator with firm, even pressure, it's ok.  My mechanic thinks I need a bigger fuel pump (Holley 80 gph).
 
Any thoughts?
 
Thanks.


______________
Chuck

Fuel Pump (12/21)
 2/14/11 1:53pm
yostusota
Former Member

Send Private Message

York, PA - USA

Vette(s):
1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top


Joined: 5/18/2010
Posts: 1518

Hey chuck is your Holley a mechanical secondary..if so you may be getting to much for the auto..
Rich

______________

My first parade at Carlisle 2010
Fuel Pump (13/21)
 2/14/11 1:55pm
manchestersharkLifetime Member
Lifetime Member
Send Private Message

Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2381

Clap VERY VERY pretty car, Gary!  LOVE the hood.

______________


Click on image for full view

Fuel Pump (14/21)
 2/14/11 2:15pm
Adams' AppleLifetime Member
Lifetime Member
Moderator
Send Private Message

Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 20126

[QUOTE=garr72]

Joel and Rich if you check the books different pumps were used on say on the Lt1 and the base engines. One last tidbit I'm running 10.13 compression. The car is currently in storage as winter is setting into the great white north Canada and this the time we use to plan and gather the parts for next years projects. Merry Xmas to all Save the wave and thanks for all your help. Garry

[/QUOTE]

The biggest difference in the pumps is where the fittings are, and which way they point, along with whether or not the pump has a return fitting...not all did. The pumps with the longer "cans" did provide more volume, but no more pressure.

I fergot all about this thread...Embarrassed


Adams' Apple2011-02-14 11:15:49

______________

Joel Adams
C3VR Lifetime Member #56    

My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Fuel Pump (15/21)
 2/14/11 2:20pm
CCasey
Former Member

Send Private Message

New Albany, OH - USA

Vette(s):
1980 Coupe / Snowcrest White / L48, 350 / Comp Cam / Edelbrock Heads / Cyclone Intake / Holley Carb / Holley Fuel Pump / Patriot Headers / Dual Exhaust / Magnaflow Mufflers / 1964 Coupe / Riverside Red / L76, 327, 365hp


Joined: 8/17/2010
Posts: 173

No. My Holley is a vacuum operated secondary.

______________
Chuck

Fuel Pump (16/21)
 2/14/11 8:10pm
garr72
Former Member

Send Private Message


Vette(s):
72 t-top red on black small block, auto,a/c,ps,pb,radio. Built Aug24/71 no.834


Joined: 11/16/2003
Posts: 16

Hi Chuck after more research I purchaced an Edelbrock rpm pump and the bottem plate that is recommended for tight fits it moves the inlet and outlet to the bottem of the pump. Its what Edelbrock recommends for the street 110 gal/hr at 6lbs no regulator needed. The car is in storage and this will be done in a few months. I'll post the results weither good bad or inderferent. Garry
Fuel Pump (17/21)
 2/14/11 8:43pm
CCasey
Former Member

Send Private Message

New Albany, OH - USA

Vette(s):
1980 Coupe / Snowcrest White / L48, 350 / Comp Cam / Edelbrock Heads / Cyclone Intake / Holley Carb / Holley Fuel Pump / Patriot Headers / Dual Exhaust / Magnaflow Mufflers / 1964 Coupe / Riverside Red / L76, 327, 365hp


Joined: 8/17/2010
Posts: 173

Thanks Garry for the info. 

So you think the 130 would be better for me than the 80?
 
I love the stinger hood, btw.


______________
Chuck

Fuel Pump (18/21)
 2/14/11 9:20pm
yostusota
Former Member

Send Private Message

York, PA - USA

Vette(s):
1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top


Joined: 5/18/2010
Posts: 1518

[QUOTE=CCasey]

Last year I had some significant upgrades done to my L48, 350.  Installed Edelbrock E-Street aluminum heads; Holley 770-cfm Street Avenger carb; Patriot tight-tuck headers; Comp Cam hudraulic roller cam; Cyclone-plus dual intake manifold.  CR now measures 9.7:1. 


My problem is that when I am at cruising speed (40 - 60 mph) and I stand on it, the engine immediately bogs-down.  If I just press the accelerator with firm, even pressure, it's ok.  My mechanic thinks I need a bigger fuel pump (Holley 80 gph).

 

Any thoughts?

 

Thanks.
[/QUOTE]
Chuck I would check the mechanical advance of the distributor..I have had a bunch of HEI cars over the years that did just that..you may even get a pop up the intake at times..since everything is new I would go for tuning verse new parts now..you may need a higher volume pump but what was on there should be enough get it running ok..
Rich

______________

My first parade at Carlisle 2010
Fuel Pump (19/21)
 2/14/11 10:36pm
CCasey
Former Member

Send Private Message

New Albany, OH - USA

Vette(s):
1980 Coupe / Snowcrest White / L48, 350 / Comp Cam / Edelbrock Heads / Cyclone Intake / Holley Carb / Holley Fuel Pump / Patriot Headers / Dual Exhaust / Magnaflow Mufflers / 1964 Coupe / Riverside Red / L76, 327, 365hp


Joined: 8/17/2010
Posts: 173

As a matter of fact I was thinking of getting it dyno-tuned.
Thanks for the tip.

______________
Chuck

Fuel Pump (20/21)
 2/15/11 1:22am
garr72
Former Member

Send Private Message


Vette(s):
72 t-top red on black small block, auto,a/c,ps,pb,radio. Built Aug24/71 no.834


Joined: 11/16/2003
Posts: 16

Chuck - The 1721 Edelbrock pump is what they recommend for street use and will support engines up to 550hp. Their racing fuel pumps  are recommended for strictley racing and you need a regulator. Garry
Fuel Pump (21/21)
 2/15/11 1:45pm
yostusota
Former Member

Send Private Message

York, PA - USA

Vette(s):
1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top


Joined: 5/18/2010
Posts: 1518

Chuck go for the dyno time..even a crappy running car can be fixed there..someday I will have one of those! Make sure the secondary springs aren't to tight..you will be able to see it with the air cleaner off..chances are the carb and timing just need tweeked..

And Gary that hood!
Rich

______________

My first parade at Carlisle 2010
Our Sponsors help support C3VR