Distributor lockout - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Short-Fuse 72' · 02-10-2004, 09:47 AM

It was suggested to me that I lock out the vacuum advance on my distributor due to the size of my cam. How would I go about doing this? Is this the same as putting in a curve kit? Any help would be appreciated. Thanks.

bigjimzlll · 02-10-2004, 11:43 AM

what kind of distributor? On my MSD it came with a lock out do-hickey. When I locked it out it really helped performance and drivability. I also limited my mechanical advance to 14º. This way I can set the intial timing to 20-22º(helps idle) and it wont over advance when at full advance.

BowTieMan · 02-10-2004, 01:21 PM

So do all distrubuter's have this? What exactly is it? Does it just advance the timing? Would a recurve kit take its place? And does it help performance?

Short-Fuse 72' · 02-10-2004, 01:51 PM

Mine is an Accel dist. with the supercoil cap/coil setup. I just was wondering if the lockout and curve kit were one in the same. Should I switch out my vacuum advance module with a mechanical one?

rodnok1 · 02-10-2004, 02:03 PM

Recurve doesn't have anything to do with lockout. Alot of engines benefit from limiting total advance by either welding the slot closed in the distrib or by a stop of some sort. I have seen articles at hotrod /carcraft/chevy hi po about this. I you really want to just bypass the vacuum advance just unplug it and cap the ports. Vaccum advance is used primary at idle/low speed if I remember correctly.

Short-Fuse 72' · 02-10-2004, 06:42 PM

Thanks

bigjimzlll · 02-10-2004, 09:05 PM

the only problem with capping off the cannister is that the cannister mechanism will still allow the plate to move some..making the timing a little errattic

02-10-2004, 09:47 AM	#1
Short-Fuse 72' Registered User Join Date: Jan 2004 Location: Austin, Tx Posts: 51	Distributor lockout It was suggested to me that I lock out the vacuum advance on my distributor due to the size of my cam. How would I go about doing this? Is this the same as putting in a curve kit? Any help would be appreciated. Thanks. __________________ Ya'll hear that? We's usin' codenames.

02-10-2004, 11:43 AM	#2
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	what kind of distributor? On my MSD it came with a lock out do-hickey. When I locked it out it really helped performance and drivability. I also limited my mechanical advance to 14º. This way I can set the intial timing to 20-22º(helps idle) and it wont over advance when at full advance. __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

02-10-2004, 01:21 PM	#3
BowTieMan Registered User Join Date: Dec 2003 Location: Glendale Arizona Posts: 747	So do all distrubuter's have this? What exactly is it? Does it just advance the timing? Would a recurve kit take its place? And does it help performance? __________________ "A true hotrodder wouldn't be content untill he had created a car so violent, so hairy, so totally sick that the very act of dropping the hammer would result in instant death. Anything less results in the need to go faster." - Tony DeFeo

02-10-2004, 01:51 PM	#4
Short-Fuse 72' Registered User Join Date: Jan 2004 Location: Austin, Tx Posts: 51	Mine is an Accel dist. with the supercoil cap/coil setup. I just was wondering if the lockout and curve kit were one in the same. Should I switch out my vacuum advance module with a mechanical one? __________________ Ya'll hear that? We's usin' codenames.

02-10-2004, 02:03 PM	#5
rodnok1 Registered User Join Date: Jun 2003 Location: Linden, North Carolina Posts: 617	Recurve doesn't have anything to do with lockout. Alot of engines benefit from limiting total advance by either welding the slot closed in the distrib or by a stop of some sort. I have seen articles at hotrod /carcraft/chevy hi po about this. I you really want to just bypass the vacuum advance just unplug it and cap the ports. Vaccum advance is used primary at idle/low speed if I remember correctly. __________________ 64 Panel Rebuild Pics Clutch Replacement and Borg Warner T10 Trans Rebuild 64 Panel 1/2 Ton 350cubes/400hp BorgWarner t-10 3:73 Auburn Posi

02-10-2004, 06:42 PM	#6
Short-Fuse 72' Registered User Join Date: Jan 2004 Location: Austin, Tx Posts: 51	Thanks __________________ Ya'll hear that? We's usin' codenames.

02-10-2004, 09:05 PM	#7
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	the only problem with capping off the cannister is that the cannister mechanism will still allow the plate to move some..making the timing a little errattic __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

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