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- From: dafuller@sequent.com (David Fuller)
- Newsgroups: rec.autos.tech
- Subject: Re: Blueprinting - What is it.
- Message-ID: <1992Aug23.210628.968@sequent.com>
- Date: 23 Aug 92 21:06:28 GMT
- Article-I.D.: sequent.1992Aug23.210628.968
- References: <714143557.F00001@blkcat.UUCP>
- Sender: usenet@sequent.com (usenet )
- Organization: Sequent Computer Systems Inc.
- Lines: 27
- Nntp-Posting-Host: sequent.sequent.com
-
- >
- >In porting and polishing, the emphasis is on enlarging and smoothing out the
- >ports. The manifold gasket can be used as a template for matching up the ports,
- >but it is probably not as exact as the blueprinting method.
-
- For basic porting, yes, that's true. But doing real head work is a serious
- discipline. Most everyone has access to the best metallurgy these days,
- good cranks, good oiling; but to increase the power output, you still have
- to rely on the science of heads, cams, valves, and manifolds/headers to
- make the Big Gains.
-
- In fact, enlarging the ports on a street motor isn't a terribly good idea
- unless you are willing to run the motor at higher revs to achieve good
- throttle response. Slowing down the speed of the intake charge will do
- just the opposite of what you'd want.
-
- My old street machine was a 318 Duster with a 2 barrel. On the street, it
- always whomped big blocks and high revving smallblocks 'cuz unless they
- wanted to make a lot of cop-attracting and clutch burning racket they had
- to wait for their motors to spool up before making Serious Horsepower.
-
- Course, I don't do that any more; but the lesson is instructive.
-
- --
- Dave Fuller All opinions expressed are my own and not
- Sequent Computer Systems those of Sequent Computer Systems, Inc.
- dafuller@sequent.com
-