3/8" line 
Problem found:You're not going to believe this!
Thread Starter
Melting Slicks
Joined: Jul 2002
Posts: 3,128
Likes: 3
From: Deltona (son of Deland and DAYTONA) FL
Problem found:You're not going to believe this!
Jim, (427HotRod) you were on the right track! Check out the pics.
This is NOT Olivier's fault. I volunteered the fuel pump rod from my L48 so we could use the one from the 383 for a tool while removing the motor.
I found this while I had the pump out when I was re-routing the fuel lines, getting rid of the rubber elbow and fabricating a metal one. I had to twist and pull the rod out with pliers. I'm sure it came out of the L48 that way and I didn't notice it because when I was installing the pump, I put some grease on the rod and pushed it up in the hole. It held the first time without sliding down, even though I was struggling with the pump. I was sure I nudged it with the pump, but it didn't drop and thought I had put just enough grease on it.
Now the solution: I think I'm going to need an electric pump. I'm going to have some questions about how to set that up. I don't know if the cam lobe that pushes it was damaged, but I'm not going to take a chance. I wonder how long the L48 was running with it in that condition?
The car drives completely normally around town and even getting on it. Funny how this symptom didn't completely manifest itself until I went to the track.
This is NOT Olivier's fault. I volunteered the fuel pump rod from my L48 so we could use the one from the 383 for a tool while removing the motor.
I found this while I had the pump out when I was re-routing the fuel lines, getting rid of the rubber elbow and fabricating a metal one. I had to twist and pull the rod out with pliers. I'm sure it came out of the L48 that way and I didn't notice it because when I was installing the pump, I put some grease on the rod and pushed it up in the hole. It held the first time without sliding down, even though I was struggling with the pump. I was sure I nudged it with the pump, but it didn't drop and thought I had put just enough grease on it.
Now the solution: I think I'm going to need an electric pump. I'm going to have some questions about how to set that up. I don't know if the cam lobe that pushes it was damaged, but I'm not going to take a chance. I wonder how long the L48 was running with it in that condition?
The car drives completely normally around town and even getting on it. Funny how this symptom didn't completely manifest itself until I went to the track.
Last edited by isosceles; Jan 19, 2005 at 07:58 AM.
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Originally Posted by isosceles
Which setup are you going with and where are you mounting it? 
A lot of racers have advocated BG blue.
A lot of racers have advocated BG blue.
Thread Starter
Melting Slicks
Joined: Jul 2002
Posts: 3,128
Likes: 3
From: Deltona (son of Deland and DAYTONA) FL
I wonder if the Holley Black pump at 120 Gph and 9psi line pressure will be enough for my motor? Is 9 PSI correct for my carb (4150 Holley 750) or will I need a pressure regulator too?
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Originally Posted by isosceles
I wonder if the Holley Black pump at 120 Gph and 9psi line pressure will be enough for my motor? Is 9 PSI correct for my carb (4150 Holley 750) or will I need a pressure regulator too?
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Nice catch.
Now i can c y fuel press indication is do popular. Many racers use a press gauge mounted in front of windshield. Holley now sells an electric for only $75 (Summit).
Good luck and thx for posting.
cardo0
Good luck and thx for posting.
cardo0
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Thread Starter
Melting Slicks
Joined: Jul 2002
Posts: 3,128
Likes: 3
From: Deltona (son of Deland and DAYTONA) FL
Originally Posted by Matt Gruber
i would replace the rod. that's why they sell them!
The car drives fine around town. But I can't really get on it like I do at the track and that's where the problem shows up. It's tempting. Does the imformation I just posted make a difference?
Race Director
Joined: Oct 2000
Posts: 15,036
Likes: 79
From: central FL, near the beach.
just put in a new one and try it. if it doesn't bind, a quick test drive will tell.
electrics' are noisey and less reliable and can keep running in an accident if not wired right.
electrics' are noisey and less reliable and can keep running in an accident if not wired right.
Team Owner
Joined: Feb 2003
Posts: 30,183
Likes: 313
From: Lake Norman NC
Interesting find...glad it wasn't anything too serious. I just installed a new pump rod in my 383, didn't grease or oil it..and it just stuck up there and stayed..Its been bothering me lately..I haven't installed the pump yet. I think i need to take it back out and lube it up some grease or oil?
Le Mans Master
Joined: Mar 1999
Posts: 6,744
Likes: 1
From: delmont pa
Cruise-In I Veteran
Cruise-In II Veteran
Originally Posted by isosceles
Jim, (427HotRod) you were on the right track! Check out the pics.
This is NOT Olivier's fault. I volunteered the fuel pump rod from my L48 so we could use the one from the 383 for a tool while removing the motor.
I found this while I had the pump out when I was re-routing the fuel lines, getting rid of the rubber elbow and fabricating a metal one. I had to twist and pull the rod out with pliers. I'm sure it came out of the L48 that way and I didn't notice it because when I was installing the pump, I put some grease on the rod and pushed it up in the hole. It held the first time without sliding down, even though I was struggling with the pump. I was sure I nudged it with the pump, but it didn't drop and thought I had put just enough grease on it.
Now the solution: I think I'm going to need an electric pump. I'm going to have some questions about how to set that up. I don't know if the cam lobe that pushes it was damaged, but I'm not going to take a chance. I wonder how long the L48 was running with it in that condition?
The car drives completely normally around town and even getting on it. Funny how this symptom didn't completely manifest itself until I went to the track.
This is NOT Olivier's fault. I volunteered the fuel pump rod from my L48 so we could use the one from the 383 for a tool while removing the motor.
I found this while I had the pump out when I was re-routing the fuel lines, getting rid of the rubber elbow and fabricating a metal one. I had to twist and pull the rod out with pliers. I'm sure it came out of the L48 that way and I didn't notice it because when I was installing the pump, I put some grease on the rod and pushed it up in the hole. It held the first time without sliding down, even though I was struggling with the pump. I was sure I nudged it with the pump, but it didn't drop and thought I had put just enough grease on it.
Now the solution: I think I'm going to need an electric pump. I'm going to have some questions about how to set that up. I don't know if the cam lobe that pushes it was damaged, but I'm not going to take a chance. I wonder how long the L48 was running with it in that condition?
The car drives completely normally around town and even getting on it. Funny how this symptom didn't completely manifest itself until I went to the track.
Thread Starter
Melting Slicks
Joined: Jul 2002
Posts: 3,128
Likes: 3
From: Deltona (son of Deland and DAYTONA) FL
Thanks Clem. I don't have a dial indictor to meaure it with though 
Hmm, a local speed shop has a Holley Blue (110 gph) kit for $119.
Olivier said I'd get 12's!!
decisions, decisions...
Hmm, a local speed shop has a Holley Blue (110 gph) kit for $119.
Olivier said I'd get 12's!!
decisions, decisions...
Last edited by isosceles; Jan 19, 2005 at 12:05 PM.
Race Director
Joined: Feb 1999
Posts: 16,978
Likes: 7
From: In Dreams There Is Truth Ohio
Holley pumps are the loudest on the market...for street use the HOlley will drive you crazy....
Mallory are much quieter, and Aeromotive, think they are the quiet ones.
Regarding the wiring, simple task..ground, inline fuse and a hot lead to ignition....nothing to it.
Mallory are much quieter, and Aeromotive, think they are the quiet ones.
Regarding the wiring, simple task..ground, inline fuse and a hot lead to ignition....nothing to it.
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Originally Posted by GDaina
Holley pumps are the loudest on the market...for street use the HOlley will drive you crazy....
Mallory are much quieter, and Aeromotive, think they are the quiet ones.
Regarding the wiring, simple task..ground, inline fuse and a hot lead to ignition....nothing to it.
Mallory are much quieter, and Aeromotive, think they are the quiet ones.
Regarding the wiring, simple task..ground, inline fuse and a hot lead to ignition....nothing to it.
Holley pumps can be made quiet. There are special mounting brackets that are rubber mounted. I do not hear my twin pumps.
Our local screw company Spanaur sells vibration dampers in different sizes and one works well for our pumps.
It is two metal flanges, right bolt pattern for our pumps and seperated by 1 in of rubber.
As I said before I also don't like mechanical pumps if they rupture the diagram they flood the motor.
These are old ones, but I put a bolt in the center and attach it to the frame and bolt the pump to the flange with the 2 holes.
Quiets the pump down enoght that you don't hear it at all when then motor is running and while priming the motor before starting just a slight buzz
Last edited by norvalwilhelm; Jan 19, 2005 at 02:16 PM.
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
I'll sell you a Holley "blue" for $50 shipped to you! I have a bunch of these pumps from my childhood "Drag days". I run a Carter NASCAR mechanical pump on my 12.28@117 MPH 72 LT-1 myself but, what the heck do I know about Drag racing as I mostly autocross my Vette. Email me fo Holley red/blue pumps, I would love to get rid of some!
Le Mans Master
Joined: Aug 2000
Posts: 6,362
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From: Brazos TX
Cruise-In IV Veteran
Cruise-In V Veteran
Originally Posted by GrandSportC3
A electic fuel pump would probably mean 12's
Thread Starter
Melting Slicks
Joined: Jul 2002
Posts: 3,128
Likes: 3
From: Deltona (son of Deland and DAYTONA) FL
Originally Posted by Solid LT1
I'll sell you a Holley "blue" for $50 shipped to you! I have a bunch of these pumps from my childhood "Drag days". I run a Carter NASCAR mechanical pump on my 12.28@117 MPH 72 LT-1 myself but, what the heck do I know about Drag racing as I mostly autocross my Vette. Email me fo Holley red/blue pumps, I would love to get rid of some!
I had a Carter 130 gph mechanical, but now I'm worried about the cam where it drives the pump pushrod. I figure the electric pump will eliminate that possibility, and maybe free up 1 HP, but eat 1/2 at the alt.