DIY_EFI Digest V5 #150

[dzorde at erggroup.com]

Hi Mike,

I use a VL/VN pump (the extranal Bosch type) on my HQ and I never installed the
damper, and I have never had any problems (apart from my Supra gearbox blowing
up the other day going home from  work, but I can't really contribute that to a
missing fuel damper).

I think the damper is to reduce the kick-back pulses that are generated by the
injectors opening and shutting, bit like water hammer in your house.  Presumably
they will reduce the flow a tiny bit, but on an OEM system I don't think it
would be more than the ecu would be able to counteract with a wider pulse width.
So in my case:
a.  Works for me.
b.  obviously nothing.
c.  N/A

L8r

Dan  dzorde at erggroup.com


<Date: Sun, 16 Apr 2000 19:44:36
<From: "Mike (Perth, Western Australia)" <erazmus at wantree.com.au>
<Subject: Fuel Damper ?
<
<Hi chaps,
<
<Have a high pressure fuel pump which feeds into a 'damper' then into a fuel
<filter (all at the back of the car under the fuel tank) before going to
<front of car for fuel rail and pressure regulator...
<
<My questions are:-
<
<a.  Are these fuel dampers really necessary or will a legnth of
<    flexible compliant hose suffice ?
<
<b.  What is likely to happen if you remove the damper ?
<
<c.  Do they restrict the flow much ?
<    If so is it nonlienar ?




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