Electramotive/Haltech/Motec Fuel Injection - Injected LPG

[Michael Bachmann]

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-----Original Message-----
From:	Carl Summers [SMTP:InTech at writeme.com]
Sent:	Friday, 13 February 1998 16:08
To:	diy_efi at efi332.eng.ohio-state.edu
Subject:	Re: Electramotive/Haltech/Motec Fuel Injection - Injected LPG

Sorry to be such a pest about this,,,but does this restrict or virtually
eliminate boost at high rpms???does the intake achieve vacuum at wot
because of the restrictor...I ask this because I have been involved in a
great number of restricted carburetion engine programs and worked for a
major camshaft manufacturer,,so enquiring minds blah blah .....
-Carl Summers
Carl,=20

To answer it simply.  Yes !  For a two litre engine, max boost at WOT =
tends to be 16.5 to 17 psi.  Slightly higher boost is sometimes seen in =
the lower gears, as some people don't bother running wastegates due to =
this fact.  The restrictor was introduced to the class due to the =
dominance of turbo cars, with some of the more adventurous people =
running up to 30 psi + boost in a 2.6 litre engine!!!!  The addition of =
the restrictor has also caused some problems related to reliability as =
the restrictor makes the turbo work much harder at high rpm to try and =
suck through enough air to suit the engine and consequently the turbo =
shafts sometimes 'pull apart' in the centre even though some people are =
using the 'RS500 Sierra Cosworth' turbo shafts !!

In your experience, can much be gained in this format with an =
alternative camshaft grind as comopared to the N/A grinds that the =
manufacturer puts out ?

Ooroo

Michael Bachmann       :-(..!..:-|..?..:-)=20


Michael Bachmann
Senior Technical Officer				E-mail mib at afts.com.au
Australian Flight Test Services Pty Ltd		tel (+61 8) 8262 6998
Innovation House West				fax (+61 8) 8343 8888
Technology Park				World Wide Web: http://www.afts.com.au
The Levels  SA 5095
AUSTRALIA


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