Vacuum advance
Thread Starter
Instructor
Joined: Jan 2004
Posts: 242
Likes: 4
From: deland fl
Vacuum advance
Hi guys..
I'm in the process of replacing the vac advance on my 75 and tried to find a VC1838 per Lars' papers. I can't locate one but have been sold a VC204 which I'm told is a direct replacement. However, when I check the VC204 on the Standardbrand.com website it says "it will not fit my vehicle". Anybody have any suggestions about what I need to do ?
TIA !
Larry
I'm in the process of replacing the vac advance on my 75 and tried to find a VC1838 per Lars' papers. I can't locate one but have been sold a VC204 which I'm told is a direct replacement. However, when I check the VC204 on the Standardbrand.com website it says "it will not fit my vehicle". Anybody have any suggestions about what I need to do ?
TIA !
Larry
Race Director
Joined: May 2006
Posts: 18,660
Likes: 2,562
Neither one is a direct replacement for the one that came on your vehicle from the factory, you are making a modification, they are for a Buick, which is why they list it that way.
Last edited by MelWff; Oct 24, 2014 at 01:45 PM.
Thread Starter
Instructor
Joined: Jan 2004
Posts: 242
Likes: 4
From: deland fl
I guess my question should have been does the VC204 have a starts @ "HG of 7-9 and Max adv (distr. degrees @" HG) 7@10-12 like the VC1838 ? If not, what are the specs for the VC204?
Thanks
Larry
Thanks
Larry
Le Mans Master
Joined: Jul 2006
Posts: 8,117
Likes: 104
From: charlotte north carolina
The Rockauto web site has some specs if you click on the "details" or "info" (can't remember what they call it) when the item is displayed. I just got a B26 and B28 can from them.
Thread Starter
Instructor
Joined: Jan 2004
Posts: 242
Likes: 4
From: deland fl
I did install the VC204 this morning and checked it out with timing light and vac gage. For those of you that need to know, it starts at 7 to 7.5 inches mercury and is all in at 12 inches of mercury. It gives me a total of 15 degrees at the crank. I set my 75 at 14 deg initial with no vac. With vac reconnected, I had 29 degrees. I ended up with 34 degrees @ 3000 RPM with no vac and 48 degrees at 3000 RPM with vac reconnected. It runs great. Now if I could just get rid of the smoke problem. Smokes bad at idle, have already replaced valve stem seals once. Any advice on valve stem seals ?
Larry
Larry
