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X-TECH MAN · 09-05-2009, 07:51 AM

The given tolerance for a burette is 1%. On a 100 C.C burette that is 1.0 (one point zero) C.C.s. Reason alone to allow some wiggle room when milling your heads. Not only the burette is involved but the medium usuallly used is alcahol and is tempature sensitive. A hot cyl. head will not check the same as a head at room temp. The alcahol will expand when the head is hot and give you a smaller reading. Some go so far as putting the head into a cooler full of ice to bring down the temp of the head. 1/2 or even a full C.C over the spec. will not slow down the car. The engine will never know it.

09-05-2009, 07:51 AM	#2
X-TECH MAN Banned Join Date: Dec 2007 Location: Lake Placid, Florida Posts: 3,203 Likes: 1,047 Liked 235 Times in 110 Posts	Re: CJ OUT at Indy!! The given tolerance for a burette is 1%. On a 100 C.C burette that is 1.0 (one point zero) C.C.s. Reason alone to allow some wiggle room when milling your heads. Not only the burette is involved but the medium usuallly used is alcahol and is tempature sensitive. A hot cyl. head will not check the same as a head at room temp. The alcahol will expand when the head is hot and give you a smaller reading. Some go so far as putting the head into a cooler full of ice to bring down the temp of the head. 1/2 or even a full C.C over the spec. will not slow down the car. The engine will never know it.