Crane Vac. can
Thread Starter
Intermediate
Joined: Feb 2006
Posts: 37
Likes: 0
Crane Vac. can
Which way do I turn the adjustment on my Crane Adjustable Vacuum Can (cw/ ccw) in order to obtain the maximum amount of advance at idle (using full manifold vacuum). I have 8"hg at idle on my 377ci. Yes, I also have a stop plate installed on the unit to limit total vacuum advance to 8 crankshaft degrees.
Drifting
Joined: Oct 2007
Posts: 1,317
Likes: 22
From: Marina CA
The directions that came with mine stated to turn fully CCW then begin turning CW in 2 turn increments until you hear pinging then turn CCW in 1 turn increments until no more pinging.
I'll be doing just that tomorrow as weight and spring kit and adjustable can were installed and now need to be dialed in.
I'll be doing just that tomorrow as weight and spring kit and adjustable can were installed and now need to be dialed in.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Instructor
Joined: Oct 2008
Posts: 209
Likes: 3
Something you may find ....interesting. I suggest that you DO NOT use the centrifugal advance springs that are supplied with the canister. I have had one of these springs actually break on two separate occassions. You are far better off using OEM springs even if they come from an old distributor. I have never know these to fail.
Tech Contributor
Joined: Aug 1999
Posts: 14,380
Likes: 6,390
From: At my Bar drinking and wrenching in Lafayette Colorado
Throw that adjustable unit in the trash and install a fixed unit with known specs based on your engine requirements. You can screw that adjustable one around all day, and in the end, you're never going to have any idea how your distributor is curved unless you put it on a distributor machine.
Vacuum advance control unit selection and specifications are outlined in detail in my Vacuum Advance Paper, which has been available to Forum members by e-mail request for several years. Yet you guys keep screwing around with this adjustable garbage and never getting your tuning set up right.
...and all they do is eat the pages.
Lars
V8FastCars@msn.com
Vacuum advance control unit selection and specifications are outlined in detail in my Vacuum Advance Paper, which has been available to Forum members by e-mail request for several years. Yet you guys keep screwing around with this adjustable garbage and never getting your tuning set up right.
...and all they do is eat the pages.
Lars
V8FastCars@msn.com
Tech Contributor
Joined: Jun 2004
Posts: 20,905
Likes: 962
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Throw that adjustable unit in the trash and install a fixed unit with known specs based on your engine requirements. You can screw that adjustable one around all day, and in the end, you're never going to have any idea how your distributor is curved unless you put it on a distributor machine.
Vacuum advance control unit selection and specifications are outlined in detail in my Vacuum Advance Paper, which has been available to Forum members by e-mail request for several years. Yet you guys keep screwing around with this adjustable garbage and never getting your tuning set up right.
...and all they do is eat the pages.
Lars
V8FastCars@msn.com
Vacuum advance control unit selection and specifications are outlined in detail in my Vacuum Advance Paper, which has been available to Forum members by e-mail request for several years. Yet you guys keep screwing around with this adjustable garbage and never getting your tuning set up right.
...and all they do is eat the pages.
Lars
V8FastCars@msn.com
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
