[Spridgets] My bug eye problems

[Jack Laird]

Wow, a grandfather we would all like to have. Oh wait I'm it.

----- Original Message ----- 
From: "Matt Hagopian" <mhagopian at hoppetool.com>
To: "John D. Caffrey" <jdc6 at lehigh.edu>
Cc: <spridgets at autox.team.net>
Sent: Sunday, August 31, 2008 2:19 AM
Subject: Re: [Spridgets] My bug eye problems


> We dont actually have to weld, we took the piece out of the piston and it
> didnt break through, smoothing it out. I didnt check the chain myself, I
> will ask my grandfather about that. As for grinding them down... There is 
> an
> unneccessary "extrude groove" sorry couldnt think of the word to describe
> it, and it is scoring the pistons as you can see. Our remedy is to grind
> that extrusion off of the valves to keep it from hitting. All my 
> grandfather
> does is build race engines for Jaguars. This is our first experience with 
> a
> 1275cc and frankly neither one of us knows much about it. I would love 
> some
> good info about the car itself (yes Im picking up a book on it) if someone
> cares to share any "secrets". Basically its a cheap racecar for me and
> whoever else wants to use it as my grandfather runs 2 series one Jaguar
> XKE's.
>
> Matt~
>
> On Sat, Aug 30, 2008 at 7:41 AM, John D. Caffrey <jdc6 at lehigh.edu> wrote:
>
>>  Matt Hagopian wrote:Guys, we pulled the head off before pulling the 
>> motor
>> out... Look at what we
>>  > found! My grandfather was right! Sent the head out to the local guy to
>> do
>> > some work on it. Pulling that piston out because one of those pieces is
>> > actually stuck into it, machining it off/out and putting a weld to 
>> > cover
>> it
>> > up. Grinding all of the valve heads down because as you can see the 
>> > valve
>> > heads are hitting.
>>
>> > Comments? Concerns?
>>
>> Matt,
>> You're kidding, right?  You cannot possibly grind a valve head down 
>> enough
>> to make the clearance you need!!!  Clearance should be .060", and 
>> removing
>> that from a valve would severely weaken it, the margin on the valve is
>> usually only .030".  The proper fix is to machine valve reliefs in the
>> pistons. Was the cam timing checked during the disassembly? Chains don't
>> last very long at race rpm, especially single row chains.
>> Welding on the pistons of a race engine is another unusual idea that may
>> distort the ring lands, and give future ring sealing or sticking 
>> problems.
>> If you want this engine to last you need to find someone experienced with
>> RACE engines.
>> John
>> Fogelsville, PA
>>
>
>
>
> -- 
> Sincerely,
>
>
> Matt Hagopian
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