C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Fuel Pump lever travel

Thread Tools
 
Search this Thread
 
Old Jun 4, 2019 | 04:16 PM
  #1  
MotorHead's Avatar
MotorHead
Thread Starter
Race Director
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Default Fuel Pump lever travel

After a few years of hiatus I am back putting together my '80. A ton of rewiring to do but I wanted to get it running again first. I took the fuel pump off last year and took it apart to check it over, now I'll be damned if I can't remember how much travel the fuel pump lever moves on the cam lobe. Seems like it is only moving a little bit, maybe 1/4 in.

Now I am scared to start it in case that isn't enough. I looked it up and found the travel to be 10 mm. Doesn't sound like a lot to me. I just completely forgot as I usually just bolt them on. Any help here is appreciated.
Reply
Old Jun 4, 2019 | 04:22 PM
  #2  
CA-Legal-Vette's Avatar
CA-Legal-Vette
Race Director
20 Year Member
All Eyes On Me
Loved
Community Favorite
 
Joined: Jul 2004
Posts: 12,708
Likes: 329
From: Scottsdale Arizona
Default

Not sure what your question is. The fuel pump pushrod does move very little. Rember that it moves with each cam cycle so half engine rpm. That’s a lot of pumps.
Reply
Old Jun 4, 2019 | 06:16 PM
  #3  
MotorHead's Avatar
MotorHead
Thread Starter
Race Director
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Default

Thank-you, my guess is I never really pushed the lever in, I just put the new on figuring it has to be good.
Reply
Old Jun 4, 2019 | 07:09 PM
  #4  
TimAT's Avatar
TimAT
Le Mans Master
15 Year Member
Liked
Loved
 
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Default

It travels just enough that if the pushrod is on the fat side of the cam it's near impossible to get the fuel pump back on.
Reply
Old Jun 5, 2019 | 12:34 AM
  #5  
gkull's Avatar
gkull
Team Owner
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Default

I'm not at home, so I can't take a picture of a cam and the fuel pump lobe. But it is much smaller than the valve lobes


Does anyone have a cam to post a picture?
Reply
Old Jun 5, 2019 | 07:45 AM
  #6  
derekderek's Avatar
derekderek
Race Director
 
Joined: Jul 2015
Posts: 13,082
Likes: 3,399
From: SW Florida.
Default

If smaller than valve lobe, 1/4 is about right. .500 cam is .3333 lobe lift.
Reply
Old Jun 5, 2019 | 08:41 AM
  #7  
jackson's Avatar
jackson
Le Mans Master
 
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Default

but with much longer duration
Reply

Get notified of new replies

To Fuel Pump lever travel





All times are GMT -4. The time now is 06:46 PM.

story-0
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-1
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-2
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-3
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-4
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-5
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-6
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-7
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-8
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-9
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE