cor 79 Posted August 24, 2014 Report Share Posted August 24, 2014 Hello, , does anybody have experience with an electric vacuumpump? I want to repace the belt driven pump to an electric pump. Anybody done this? Does any standard car have this so i can get one from a breakers? thanks Cor Quote Link to post Share on other sites
jonwat 422 Posted August 25, 2014 Report Share Posted August 25, 2014 Deisels vehicles have electric vacuum pumps for the brake servos as they don't have a throttle :-) Quote Cheers, John W http://jonwatkins.co.uk Link to post Share on other sites
Bibs 11,101 Posted August 25, 2014 Report Share Posted August 25, 2014 Later 4 pot Esprits have an electric pump. Quote 88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport Evora NA For forum issues, please contact the Moderators. I will aim to respond to emails/PM's Mon-Fri 9-6 GMT. Link to post Share on other sites
jonwat 422 Posted August 25, 2014 Report Share Posted August 25, 2014 Later 4 pot Esprits have an electric pump. Didn't the V8s have them as well, if not what did they use to power stuff like the heater direction flaps??? Quote Cheers, John W http://jonwatkins.co.uk Link to post Share on other sites
Vulcan Grey 251 Posted August 25, 2014 Report Share Posted August 25, 2014 You'll need a tensioner pulley for the waterpump belt, since the mechanical vacuum pump does that function Quote Travis Vulcan Grey 89SE My Lotus Photo and Projects Album Link to post Share on other sites
dave000 1 Posted August 26, 2014 Report Share Posted August 26, 2014 browse the electric car web sites Quote Link to post Share on other sites
andydclements 749 Posted August 26, 2014 Report Share Posted August 26, 2014 You could do as Travis suggests and fit a tensioner but you could simply use the belt on cars with no vac pump and no PAS pump, which simply relies on there being sufficient grip on a belt. The cars that have the mechanical vac pump tend to have servo assisted brakes, so the smaller electrical pump used on cars with electrically powered ABS isn't really a great idea, look for a more capable electrical pump such as those used in the hot rod market where they are fitting servos etc. It will greatly reduce your time to de-pressurise the servo between brake activations. Quote Link to post Share on other sites
Mysterae 243 Posted August 26, 2014 Report Share Posted August 26, 2014 When I was having vacuum issues I briefly looked in to an electric vacuum pump and bought a cheap one from ebay. It was crap, extremely noisy (think Scalextric car at full throttle) and would still have to mount it somewhere. I'd never trust it for brakes. As Andy C says above, you'll need something much more capable. My new mech vacuum pump provides about 25 inHG. All in all it was much easier to replace the mech pump for another one. I have got and empty fire extinguisher bottle that I'm thinking of adding to the vac circuit to act as a reservoir, but don't think I need to fit it now. Quote Signature not working... Link to post Share on other sites
MrDangerUS 121 Posted September 1, 2014 Report Share Posted September 1, 2014 Look for AUDI A4 A6 A8 S4 S6 Q7 VW PASSAT BRAKE VACUUM PUMPOEM # 8E0 927 317and/or 2007 AUDI Q7 Brake Vacuum Pump 8E0 927 317B Quote Link to post Share on other sites
cor 79 Posted September 7, 2014 Author Report Share Posted September 7, 2014 Hi all, many thanks!! John, audi one looks nice going that route! Quote Link to post Share on other sites
cor 79 Posted March 18, 2015 Author Report Share Posted March 18, 2015 Used a vacuum pump of Hella, the larger one, a up32, audi uses the up28, added a pvc reservoir made of a drainpipe, The vacuum switch is from Festo. For now it all works, will see how it works on the road. Quote Link to post Share on other sites
lrg_machine 6 Posted March 18, 2015 Report Share Posted March 18, 2015 When my vac pump failed i bought one of these kits http://www.simtekuk.co.uk/product.php/vacuum_pump_kit_3-_high_performance_kit/?k=:::1914234:17:130544 Sort of worked but I ended up needing to supplement it with a timed relay and one way valve so that the pump would keep running for a few seconds or so after creating the required vacuum. Otherwise it would it would cycle constantly on and off when vac was reached. Been installed for a few years now. Quote Jez Mean Green S4s I think therefore I am - Descartes I'm pink therefore I'm spam - Eric Idle Link to post Share on other sites
cor 79 Posted March 18, 2015 Author Report Share Posted March 18, 2015 Jeremy, the festo switch has a adjustable hysterese so it does not switch on and off constantly, one way valve is also plumbed in. Quote Link to post Share on other sites
lrg_machine 6 Posted March 18, 2015 Report Share Posted March 18, 2015 The vacuum switch supplied with this kit didn't have a wide enough setting so the pump just switched on and off constantly, hence the addition of a timed relay. Quote Jez Mean Green S4s I think therefore I am - Descartes I'm pink therefore I'm spam - Eric Idle Link to post Share on other sites
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