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**swervin ervin** · 09-23-2004, 01:19 AM

Yes, you need a new canister. A Crane adjustable vacuum advance canister. Stock cans usually provide 20 to 25 degrees of advance. A lot of folks will tell you to hook it up to a ported source. This will lower the advance at idle but IMO, is the wrong way to go about it.

Read this article.

http://www.73-87.com/7387garage/drivetrain/hei.htm

09-23-2004, 01:19 AM	#2
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Yes, you need a new canister. A Crane adjustable vacuum advance canister. Stock cans usually provide 20 to 25 degrees of advance. A lot of folks will tell you to hook it up to a ported source. This will lower the advance at idle but IMO, is the wrong way to go about it. Read this article. http://www.73-87.com/7387garage/drivetrain/hei.htm __________________ Mike 1985 Chevy C-10