RE: BOSCH fuel system books

["Ian Overholt" <ioverholt@hotmail.com>]

I agree wholeheartedly with Jonas' review of the book.  It goes to great 
lengths to demystify the workings of fuel injection.  Definitely a great 
book.

As for the modifications section, well FI isn't easy to modify correctly.  
And the author says this over and over.  There is a lot of research that has 
gone into the system and it is optimized for many applications.  The systems 
are tuned for reliability, emissions, economy, performance, fuel quality, 
temperature and altitude.  You can start changing something and not know 
where you will gain and where you will lose some functionality.  The 
standard FI system will not impede performance at all until the engine is 
putting out more than 170 hp according to Probst.  So what he's saying is 
that you don't really want to modify the system unless you add something 
that wasn't orginally in the picture, like a turbo for instance.  Our 
systems are slightly less flexible than the Motronic systems because mixture 
and ignition are in different computers.  So swapping in a Motronic system 
would probably be the best (but not easiest) way to gain flexibility.

Enough rambling!

Ian Overholt
'88 16v
'78 Sidewinder


----Original Message Follows----
From: Jonas Karlsson <jkarlsso@metabolex.com>
Reply-To: Jonas Karlsson <jkarlsso@metabolex.com>
To: "'scirocco list'" <scirocco-l@scirocco.org>,        Ewan Hopkins 
<Ewan.Hopkins@computeraid.co.uk>
Subject: RE: BOSCH fuel system books
Date: 13 Aug 99 09:56:45 +0100

Well, I don't have the Ben Watson Book, but I do have the one by Pobst.

I am very satisfied with paying the $24 that borders.com charged for it.

Lemme go into detail:

The book covers both Pulsed Injection and CIS. For each system there is a
thorough explanation of how it all works, the role of each part, etc. It
starts with the basics and then goes into the nitty-gritty. Then there
is a whole section on testing and trouble shooting. What tests to do and
what the results indicate.

Lastly there is a section on modifications. I've been too busy to study
this part as much as I studied the "Fundamantals" section, but IMHO the
explanations of the systems in the "fundamentals" section were good
enough that I am in no big rush. With a strong understanding of how it
all works, tweaking it for performance doesn't have to be spelled out.

The book is excellent.

Let me know if you need more info.

Jonas
85 Scirocco

Ewan Hopkins wrote:
 >Anyone out there have both the Ben Watson book 'How to tune &
 >modify Bosch
 >fuel injection' & the official Bosch book ( Charles O. Probst).
 >I've just
 >bought the Ben Watson book & I wasn't that impressed - the
 >section on
 >modification is a joke & there's virtually nothing about the
 >electronics.
 >Is the Probst book any better?  I'm looking for better
 >information on the
 >k-jet & motronic systems.
 >
 >TIA,
 >
 >Ewan Hopkins.
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