Date: Tue, 7 Jan 2003 20:33:08 -0600
Reply-To: Stan Wilder <wilden1@JUNO.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Stan Wilder <wilden1@JUNO.COM>
Subject: Great Engine test stand event, part 2
Content-Type: text/plain; charset=us-ascii
While setting up the engine stand I discovered several things; First VWs
don't like to have the Carb 24" from the cylinders. The accelerator surge
pump on my tiny Weber Carb has very little value at all. It causes
backfiring when you accelerate the engine quickly.
Case in point; I made up a plug consisting of two rubber washers for the
big hole (VW throttle body mount) and installed it with two steel washers
that held "the plug" in place and sealed the hole. It blew out once and
required reinstalling, no big deal.
Later the same day it blew out again ..... but boy I must have had some
fuel laying in the bottom of the intake plenum because ..............
WoW! it really blasted out on the next backfire. I'm estimating the range
at about 100 yards and about all I can say after a thorough search that
It is part of the neighborhood landscape now, unfound.
I'm still not ready to post the pictures of this strange apparatus but
I'll get "A Round Tuit", soon.
I'm not recommending that everybody build an engine test stand but I've
come up with some real revelations after running in the first engine.
First of those being that: If the engine is out of the vehicle during
this process It makes very little noise on the run in routine. When
engines are run-in in the vehicle it is very noisy process since every
little tick or clack is amplified by the surrounding sheet metal and
engine bay.
I had expected some tremendous thrashing and smoking of the engine but
the engine simply started and ran.
Simple enough.
I ran the engine for 20 minutes at 2000 rpms and monitored the oil temp,
oil pressure and vacuum.
Everything was satisfactory so I'll restart the engine tomorrow to warm
it and change the engine oil.
I'm then going to run it in for another 8 hours at 2000 rpms on the next
oil change.
This whole rig is on a caster mounted steel frame so I just roll it into
the garage at night and all I need to do the next day is set the fuel
tank on it and go again.
I didn't hook the blue wire from the alternator to anything but the
engine continues to run without battery support (I thought this was the
excite for the alternator). I suppose it could be running on less than
full alternator charge. It was my intention to hook this wire to the
starter switch for momentary excitement of the alternator but just didn't
get it done.
Stan Wilder
________________________________________________________________
Sign Up for Juno Platinum Internet Access Today
Only $9.95 per month!
Visit www.juno.com
| 
