Dwell setting question
Thread Starter
Racer
Joined: Jan 2008
Posts: 343
Likes: 0
From: Hartford Kentucky
Dwell setting question
What is the procedure of setting the dwell on dual point dist. with fuel injection?
Does the dwell meter connect to plus and minus side of coil?
This is the 1960 corvette.
Does the dwell meter connect to plus and minus side of coil?
This is the 1960 corvette.
Race Director
Joined: Feb 2007
Posts: 15,424
Likes: 8,875
From: northern california
C2 of Year Finalist (track prepared) 2019
Hi Junior and Tina,
Connect the "hot" lead of the dwell meter to the (-) terminal on the coil. Connect the other dwell meter lead to a convenient ground point.
To set the points, disable one set by jamming a piece of cardboard between the contacts. Run the engine and adjust the other set of points for 29 degrees dwell.
Now, move the cardboard over to the other set of point contacts and set the first set of points for 29 degrees dwell.
Remove the cardboard (which enables both sets of points) and verify that you've got about 33 degrees (as I recall) total dwell.
Having said that, I find dual points to be a PITA. So in the distributor of my 'FI '60, I have one point set disabled permanently. Runs fine.
Jim
Connect the "hot" lead of the dwell meter to the (-) terminal on the coil. Connect the other dwell meter lead to a convenient ground point.
To set the points, disable one set by jamming a piece of cardboard between the contacts. Run the engine and adjust the other set of points for 29 degrees dwell.
Now, move the cardboard over to the other set of point contacts and set the first set of points for 29 degrees dwell.
Remove the cardboard (which enables both sets of points) and verify that you've got about 33 degrees (as I recall) total dwell.
Having said that, I find dual points to be a PITA. So in the distributor of my 'FI '60, I have one point set disabled permanently. Runs fine.
Jim
Team Owner
Joined: Aug 2007
Posts: 58,061
Likes: 7,145
Army
Its actually 34* total dwell as the final measurements; but Jim is right on the rest..here is the procedure:
http://chevy.oldcarmanualproject.com...2csg06y05.html
The dual points supposedly provide greater coil saturation via the extended dwell....
I pulled my dual point dizzy and run a Pertronix billet distributor.
http://chevy.oldcarmanualproject.com...2csg06y05.html
The dual points supposedly provide greater coil saturation via the extended dwell....
I pulled my dual point dizzy and run a Pertronix billet distributor.
Thread Starter
Racer
Joined: Jan 2008
Posts: 343
Likes: 0
From: Hartford Kentucky
Thanks Jim, I just lost memory on this. I had the car running great and the cranking signal valve went bad and fouled out the points and plugs. I was told this might happen often.
Anyway, once again, thanks !!!!!
Anyway, once again, thanks !!!!!
Safety Car
Joined: Mar 2009
Posts: 4,191
Likes: 951
From: Corpus Christi, TX
Indeed that was the reason. It is necessary for the points to open to a certain minimum gap in order to break the arc that forms when they open. If the gap is too small, the arc will never break, and you'll get almost no spark. That's why you can't just crank up the dwell by closing the gap on single points. If you aren't having the car judged, for heaven's sake get something electronic, preferably something that fits in the distributor. There are in-distributor units available with only one hookup wire so that it will even look like you have points in there if you want to keep the appearance original.
Team Owner
Joined: Oct 2000
Posts: 38,897
Likes: 1,926
From: Washington Michigan
Drifting
Joined: Feb 2011
Posts: 1,259
Likes: 18
From: Dixon California
Tx for the reply...but I need a complete dizzy any suggestions or prefrences?...I have a 427/435 and would love to have a stock TI etc...but.... I think there is something that Forum members might suggest and the source..would be appriciated..and still work under stock shielding
Bluzrocker
Bluzrocker
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Safety Car
Joined: Mar 2009
Posts: 4,191
Likes: 951
From: Corpus Christi, TX
Tx for the reply...but I need a complete dizzy any suggestions or prefrences?...I have a 427/435 and would love to have a stock TI etc...but.... I think there is something that Forum members might suggest and the source..would be appriciated..and still work under stock shielding
Bluzrocker
Bluzrocker
http://www.summitracing.com/parts/maa-3864501/overview/
Team Owner
Joined: Aug 2007
Posts: 58,061
Likes: 7,145
Army
Tech Contributor
Joined: May 2005
Posts: 15,576
Likes: 118
From: Conroe Texas
No tach drive on the Pertronix.
