weber efi

[Wilman Lee]

----------
> From: nluker <nluker at one.net.au>
> To: diy_efi at efi332.eng.ohio-state.edu
> Subject: weber efi
> Date: Friday, May 22, 1998 5:40 PM
> 
> Thanks wilman and espen
> My car is a auto so maybe thata why I cant pull more than a peak of
> 10psi boost. On the turbo gauge this is the start of the yellow range.
> 
> 
>  "I believe that there is a fault in the
> factory
> mapping particularly at idle and low throttle angle'"
> 
> Yes i agree I think the duty cycle of the injectors is to high when
> cruising on a light throttle. The best we get on our car is 18
> m.p.g.(imperial gallons) 90% of the cars driving is on country roads at
> a fairly constant 50 to 60 mph on a very light throttle. I have finally
> got my hands on a volt meter with a duty cycle function so will do some
> testing this weekend to see if this is true.
> I have defeated the amal wastegate valve as a test once by disconnecting
> the hose nearest the fire wall (hose W) and the car produced around 18
> pounds boost. It went quite well for 10 minutes and then blew the turbo
> hoses off ! The boost gauge in the car was up at the 12 o'clock to 1
> o'clock position. This means the turbos are up to the job but without
> being able to monitor the knock detect signal some how I am reluctant to
> put a bleed valve on this hose as the ecu,s ability to reduce boost when
> knocking occurds would be reduced. So if i could re write the max boost
> value I would achieve a better solution.

I think it is quite safe to run 1 bar of boost.
I believe the knock sensor is used to retard the ignition timing when
triggered,
not to reduce boost.




>                   yours
>                        nick luker
>