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Date:         Mon, 25 Jun 2001 00:40:42 -0700
Reply-To:     Todd Last <Rubatoguy@MINDSPRING.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Todd Last <Rubatoguy@MINDSPRING.COM>
Subject:      Re: WBX big valve heads and flow bench results
Comments: To: Robert Donalds <bostneng@FCL-US.NET>
Content-Type: multipart/alternative;

What are the differences between your big valve heads and the ones offered by Faste German Auto? Are they different sized valves, or similar?

Todd '88 Westy

Robert Donalds wrote:

> Fellow vanagon types I have been building a 2.1 engine for my own 85 > camper and along with the usual upgrades of the reground OEM cam with > more duration, a little more piston skirt clearance and some major > head work. I decided to try a set of larger valves and larger harder > valve seats. After all the work to get larger valves and seats into a > pair of AMC heads and doing the high flow valve job I sent the heads > out to have them flow tested on a flow bench. The flow bench measures > cubic feet of air moving threw each port at a given valve lift. Some > of you might recall that I had some flow testing done when I started > doing high flow valve jobs on stock heads with varying degrees of > porting work. Flow bench test results1 stock AMC head intake port2 > ported and polished AMC head stock valve intake port3 Boston Bobs big > valve AMC head minor porting > CFM.------------------------------------------------------------------- Lift > NO.1intake NO.2 intake NO.3 intake.050 24.8 > 33.0 34.8.100 47.1 52.2 > 57.3.200 89.6 91.4 108.4.250 > 115.4 116.7 132.8.300 125.3 > 128.5 145.8.350 137.6 145.3 > 171.4.400 144.9 158.8 181.3 this > is above stock lift but I thought it was of interest.450 > 147.8 174.1 186.0 to Robert > Lilly.500 154.6 179.0 190.6 as you can > see I am very pleased with the results.I am tempted but wont be using > ratio rockersmaybe a chip if they have them for the 85 fuel injection > system next yearno dyno testing will be done unless your payingno > estimates of horse power wiil be offeredI am still installing the > engine and will report on power when its sorted outat that point I > will decide whether to offer the large valve heads on my > rebuiltengines Bob Donaldshttp://www.bostonengine as always all rights > reserved


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