Re: [T3] Type engine longevity

["Shad Laws" <shad@lnengineering.com>]

<x-charset iso-8859-1>Hello-

> Why not use new all ALUMINUM block from VW Mexico, really nice pure
> aluminum, tap it for full flow be as good as any type 2/4 RICH 
Cosworth061

A few reasons:
- still doesn't use throughbolts!!! Look at the main six bolts.  The 
T2/4 is held together by high-strength steel studs, as is the Porsche 
911, the center-mains of the Porsche 356, and IIRC the Porsche 547 (4-
cam 4-cylinder engine).  The T1/3 is held together by cast light alloy 
threads.  That's not very strong.
- still doesn't include oil filter as stock.  Yah, okay you can put one 
on, but it still doesn't include the bypass so a clogged filter = very 
bad.  Not a huge problem, but something to think about.
- too heavy!  Those cases are cast cheaply with cheap material and 
cheap tooling, and weigh as much as a T4 although they're smaller.
- there have been about 1,000,000 problems found with them by 
blueprinting engine builders.  Quality is _not_ up to par.
- still have small heads that don't dissipate heat well.  The T4 head 
is FAR superior in this matter, and this is perhaps my single most 
favorite aspect of the T4.  Higher engine load without high engine 
temps!

There _are_ good T1/3 engine cases out there.  My favorite is the TF-
1.  But, it costs.  And, you still have small heads...

Take care,
Shad Laws
LN Engineering
http://www.LNengineering.com



> ----- Original Message -----
> From: "Marc Bona" <chillz1@angelfire.com>
> To: <type3@vwtype3.org>
> Sent: Tuesday, September 10, 2002 10:54 AM
> Subject: Re: [T3] Type engine longevity
> 
> 
> > >Do we? First I've heard of that idea, and I've owned, driven and 
built
> both.
> > >I would tend to disagree -- heartily
> >
> >              I'm sorry, but the T4 case, which of
> > course is made of much stronger aluminum and not
> > magnesium, along with it's through bolt case design,
> > is FAR superior to the type 1/3 case. Basically, the
> > only weakness that the type 4 has, is the tendency
> > for factory, unaltered heads to drop valve seats,
> > therefore usually causing the engine to self destruct.
> > Any competent rebuilder has these heads modified with
> > different seat material and has the seats machined
> > with a tighter interferance fit, thereby completely
> > solving the dropped seat problem. The addition of
> > factory oil filtration doesn't hurt either ;) True,
> > they are a different and somewhat more complicated
> > animal to those who are used to wrenching on type 1/3
> > engines exclusivly, but if built right, can take FAR
> > more abuse than a comparitivly sized type 1/3 engine.
> > Leon, this may be an alternative for you ;) The only
> > thing for me, is that I would like to keep my car
> > somewhat stock appearing and do not want to go through
> > the many hassles of installing the type 4 ( the hassles
> > aren't that many, but can be a tad expensive to
> > overcome).
> >
> > >Who will build it?
> >
> >                     I will, of course :)
> >
> > Marc
> > 1967 Fastback
> >
> >
> >
> > Is your boss reading your email? ....Probably
> > Keep your messages private by using Lycos Mail.
> > Sign up today at http://mail.lycos.com
> >
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