Guest Anonymous Posted February 13, 2001 Share Posted February 13, 2001 In cars where EFI was not original, is it necessary to add a surge tank or an in-tank sump? I've heard that the pickup may suck air when the tank is low. Anybody using EFI with an early non-EFI furl tank got any suggestions? ------------------ Jack Collins 72 240Z 66 Mustang Coupe 250/AOD Click Here to visit the Ford Six Cylinder Performance Forums! Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted February 13, 2001 Share Posted February 13, 2001 I've got a surge tank and 2 pumps - 1 keeps the tank filled and pressurized to a coupla psi and the other feeds the engine from the surge tank. Surge tanks are expensive as hell to buy, I made my own for around $50 or so, instead of $200+ to buy one. I offered to make a coupla at the same time, but nobody was interested in buying one at the time. ------------------ Morgan http://z31.com/~morgan/s30 http://carfiche.com Quote Link to comment Share on other sites More sharing options...
Mike kZ Posted February 13, 2001 Share Posted February 13, 2001 My engine is fuel injected, I added a sump to the stock tank (240Z). There around $50 from Summit, or Jeg's. ------------------ http://members.tripod.com/~SnowSurfer/mikekz1.html Quote Link to comment Share on other sites More sharing options...
randy 77zt Posted February 14, 2001 Share Posted February 14, 2001 try a 75 or 76 tank.hose nipple out is 1/2 to pump and it baffled for efi use. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted February 14, 2001 Share Posted February 14, 2001 I'm running factory GM TBI w/ a VW Rabbit external fuel pump w/ an accumulator and have no problems. I was expecting to have to add some sort of sump, but haven't had a problem. I realise the TBI uses alot less fuel pressure, so TPI may be a different story. Just my experience. Jeff ------------------ '71 240 '91 TBI 305,700R4 w/ shift kit Quote Link to comment Share on other sites More sharing options...
Guest Locutus Posted February 14, 2001 Share Posted February 14, 2001 What kind of PSI does the VW fuel pump have. I remember my old 81 VW rabbit, it had a stout pump, but it also had mechanical fuel injection(pain in the ass metering blocks) I am going with TPI also and I am looking for a pump that is cost effective that does not require placement in the tank. I think TPI needs 50+ PSI (I am not sure on a quite a few things like that, I am still collecting reference manuals on TPI to work my way thru the problems) Mike Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted February 14, 2001 Share Posted February 14, 2001 Mike, if I recall correctly, when I was given the suggestion by a VW mechanic buddy of mine to use the VW pump, he said it dead headed at like 75 psi. I believe the Bosch injection needs about the same pressure as most EFI systems. If you need hard numbers regarding the pump, let me know. Jeff ------------------ '71 240 '91 TBI 305,700R4 w/ shift kit Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted February 16, 2001 Share Posted February 16, 2001 What does the accumulator do and what does it look like? What kind of VW? would I also find these on Nissans or BMW's? ------------------ Jack Collins 72 240Z 66 Mustang Coupe 250/AOD Click Here to visit the Ford Six Cylinder Performance Forums! Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted February 19, 2001 Share Posted February 19, 2001 The accumulator is a small canister w/ a diaphragm and spring in it. It's function in it's OEM system was to keep pressure in the line for a period of time after the pump is off for a quicker restart, I believe. This combo came out of an early '80s Rabbit. Hope that helps, Jeff ------------------ '71 240 '91 TBI 305,700R4 w/ shift kit Quote Link to comment Share on other sites More sharing options...
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