Date:         Sun, 24 Oct 1999 11:13:00 -0400
Reply-To:     EMZ <vw4x4@FYI.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         EMZ <vw4x4@FYI.NET>
Subject:      Re: Questions for the Engine Builders Re: high lift rocker arms
Comments: To: CARY CHIANG <chiang1@USA.NET>
In-Reply-To:  <19991024090320.27689.qmail@nw178.netaddress.usa.net>
Content-Type: TEXT/PLAIN; charset=US-ASCII

  Maybe an easy way to answer this is: Why didn't VW do this from the
factory? IF it was as easy as, a bolt on item, they would have.

            Eric                   86-VW4x4
            vw4x4@fyi.net          72-240z
            Pittsburgh, PA USA     1936-Chrysler


On Sun, 24 Oct 1999, CARY CHIANG wrote:

> Dear Builders:
>     Please have patience with me, and hold the flames till I'm done...
> I seem to recall that a VW magazine this spring did an article on high lift
> rocker arms (maybe Fast German's?) on a modified Bug motor.  The before and
> after dyno tests showed a maximum improvement of about nine HP at about 4500
> RPM (I think).  My recollection of details is sketchy because I wanted to buy
> the rockers for my Westy but became disillusioned by the test results and
> discarded the article.  Anyway, did anyone else read that article and can
> confirm my numbers?  I realize a waterboxer is not a bug motor, but aren't
> they similar enough to draw a comparison (My ignorance of cam profiles, valve
> sizes, cylinder displacement etc. of the two motors not withstanding)?  Are
> not the performance rocker arms the same?  Forgive me for asking questions
> without knowing all the facts, but bottom line; is 9HP gain on one test versus
> 22HP on another using similar(?) motors reasonable, or am I all wet?
>
> Cary (Ready for the flames, 'cause its a dry heat!)
>
>
>
> Robert Lilley <Wolfvan88@AOL.COM> wrote:
> http://www.volks-motorsports.com/
> http://www.volks-motorsports.com/C-R_DynoManufacturer.html
> http://www.volks-motorsports.com/NewDynoResults.html
>
>
> If you look at the chart, adding the rockers "ONLY" added 22 HORSEPOWER at
> the wheels...
>  (90HP + 22HP= 112HP A 25% increase in power on a STOCK engine)...
>
> Imagine the HP AFTER COMBINED with ALL the other mods I made...
>
>
> SO, adding 45% might NOT BE SO HARD after all folks...Plus with no additional
> stress only reduced stress on engine...
>
>
> Heads
> Cam
> Exhaust
> Crankshaft
> Flywheel
> Fuel pressure regulator
> Lightened valve train
> Ratio rockers
> Use of synthetic oils
> Friction reducing coatings
> Throttle body
> Match porting intake and exhaust
> Air filter changes
> Blueprinting parts
> Adjusted timing
> Plus CAREFUL assembly...
>
>
> A lot of little changes add up to a bigger change.
>
>
> Robert
>
>
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