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my volvo engine has a 300 deg cam in it, and the servo dosnt seem to like it at low speed. can i get an electric pump instead fo going to the manifold?
thanks
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mk2cossie
Club Retro Rides Member
Posts: 2,946 
Club RR Member Number: 77
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There are a few models with electric pumps to vacuum the servo. No idea what kind of system they have in place for wiring tho  Also, is your current pipework fitted with a one way valve to the servo feed? |
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yes it is, but i think on idle it dosnt pull much vacuum due to the duration of the cam. so its fine when I'm going but not when I'm in traffic .
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Volvo's like the V70 often use an electric vacuumpump to assist the engine. These pumps use a vacuumswitch in the hose to the brakeservo and if the vacuüm passes a certain level it switches on the pump. Very nice simple system.
I use one in my giulia as i have no vacuumpump on my engine due to spacelimitations. Works perfect.
I've seen some yanks that use them as well on tuned v8's with the same low vacuüm situations. BMW M3 V8 had one as well i think.
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oh that is fantastic, ill get one of those then !!!
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I use one as well as my servo is in my boot.
Works a treat.
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Proton Jumbuck-deceased :-(
2005 Kia Sorento the parts hauling heap
V8 Humber Hawk
1948 Standard12 pickup SOLD
1953 Pop build (wifey's BIVA build).
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How about an alternator with a vacuum pump built in,- a la diesel transit ( not sure which model)?
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Early Corsa diesel have the pump on the back of the alternator, not that expensive if you can make it fit
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actually the corsa one sounds good but the diesel car will rev to maybe 6? the bmw is to 7, so id think it would be ok?
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mk2cossie
Club Retro Rides Member
Posts: 2,946
Club RR Member Number: 77
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Diesels rev to 5.5k at most usually. Maybe change the size of the alternator pulley to allow it to be fine with a higher RPM  |
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