Date:         Fri, 7 Nov 2008 13:31:38 -0500
Reply-To:     greg@POTTSFAMILY.CA
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Greg Potts <greg@POTTSFAMILY.CA>
Subject:      Re: Update: Evaluating a "Found" Engine
Comments: To: Michael Sullivan <sandwichhead@GMAIL.COM>
In-Reply-To:  <eccfedcc0811070810p27b0dbd5va18b4aadc59ece5d@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes"; format="flowed"

Hi Michael,

I was surprised by those numbers as well, but the compression tester  
is only a few months old and I have no particular reason to doubt its  
accuracy. I previously used it to check a good-running T4 air-cooled  
engine  and got 120's all round. It took a few turns of the engine to  
build up to 180, usually the first stroke brought a 120 and every time  
the cylinder being tested "fired" the needle would come up a bit. Once  
it stopped increasing I wrote down the number for that cylinder.

There was a fair bit of carbon on the spark plugs on the 1-2 side; it  
might be that the increased compression on that side is a result of  
carbon build-up.

Happy Trails,

Greg

Quoting Michael Sullivan <sandwichhead@GMAIL.COM>:

> On Fri, Nov 7, 2008 at 10:07 AM, Michael Sullivan   
> <sandwichhead@gmail.com>wrote:
>
>> I'm looking at a compression test from the stealership that the PO did and
>> results are:#1-120, #2-125, #3-125, #4-130. dx SAYS ALL ok.
>>
>>
>> On Fri, Nov 7, 2008 at 9:21 AM, Paul Guzyk <paullist08@guzyk.com> wrote:
>>
>>> Greg,
>>> Compression of 180-195 in a used waterboxer is really good.  Almost too
>>> good to be true.
>>>
>>> I rarely see WBX's with that high of compression.
>>>
>>> Are you sure your compression tester is accurate?