C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

Fuel pump part numbers

Thread Tools
 
Search this Thread
 
Old Jan 27, 2010 | 12:51 AM
  #1  
AvRog's Avatar
AvRog
Thread Starter
Racer
10 Year Member
 
Joined: Mar 2009
Posts: 331
Likes: 1
From: Brooklin Ontario
Default Fuel pump part numbers

Hi All, 1969 AIM gives part numbers for all except L68 and L71. Need to check whats on mine. Running lean (as per the plugs) and losing power at 4000 rpm in all gears.
Lines good, filter new, intake screen new, carbs and cam stock (L68).
18 psi manifold vac. Secondary carbs working well.
Car idles smooth, great power and torque until 3800 ish. Fuel pressure is about 4.5 psi and steady at idle and as I pump the gas. can't check under load until the snow goes away.
Any fuel pump suggestions if I discover I need to go that way?
Thanks, Rog.
Reply
Old Jan 27, 2010 | 09:32 AM
  #2  
Easy Mike's Avatar
Easy Mike
Team Owner
Supporting Lifetime
20 Year Member
 
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
Default

Check the AIM for a note/symbol saying your fuel pump is the "same as ..." If the AIM does not show your specific fuel pump in a diagram, there is likely to be the note.

Reply
Old Jan 27, 2010 | 09:41 AM
  #3  
Duke94's Avatar
Duke94
Le Mans Master
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
Default

My Chevy Parts book shows P/N 6416741 (Type 40482) for 3/2 BC and
6470106 (type 40718) for the 4BC. Not sure what your engine is.

Gary
Reply
Old Feb 6, 2010 | 11:46 AM
  #4  
AvRog's Avatar
AvRog
Thread Starter
Racer
10 Year Member
 
Joined: Mar 2009
Posts: 331
Likes: 1
From: Brooklin Ontario
Default

Originally Posted by Duke94
My Chevy Parts book shows P/N 6416741 (Type 40482) for 3/2 BC and
6470106 (type 40718) for the 4BC. Not sure what your engine is.

Gary
Thanks Mike and Gary, Not sure what BC and 4BC is, will try to find out. I know that the 40482 is for the 4bbl bb. L71 and L68 Tri power can flow 1100 cfm as compared to the 850 of the 4bbl supplied by the 6440659 fuel pump. If it were 1 straight fuel feed on the 3 by 2 set up I'm sure the 6440659 pump would do it. The 3 by 2 carbs split the fuel feed 3 times and at 90 degree turns, and for that reason I think a meatier pump may have been required. Looks like the 40718 is for the L88.
I need to look more at the 6416741 type 40482. Thanks for the help, until now that # I have not come across.
Later, Rog.
Reply
Old Feb 6, 2010 | 12:11 PM
  #5  
74 LS4-454's Avatar
74 LS4-454
Melting Slicks
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2006
Posts: 2,248
Likes: 67
From: Warrington PA
Finalist 2020 C4 of the Year - Unmodified
Default

Originally Posted by AvRog
Thanks Mike and Gary, Not sure what BC and 4BC is, will try to find out. Later, Rog.
4BC stands for 4-Barrel Carb BC stands for Bolt circle which does not pertain to the fuel pumps. in section 3.900 as Gary pointed out the part #'s, there is no abbreviation of BC with any descriotion, only 4BC
3/2BC etc. hope this helps.....................Tom
Reply

Get notified of new replies

To Fuel pump part numbers





All times are GMT -4. The time now is 09:26 AM.

story-0
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-1
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-2
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
story-3
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-4
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-5
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-6
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-7
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-8
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-9
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE