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dreamgts · Joined: 29 Dec 2009 Posts: 504 Location: malta

Since Im converting to webers I have to change the fuel pump. My queries are as follows. Should I attache the new pump where the old pump was using also the old electrical conections? or should I re route it to the engine bay? If I re route it to the engine bay shall I connect the pump to the old cis fuel piping meaning after the fuel filter and then to the webers? any other alterations I need to do here is much appreciated Since Im putting everything on paper before starting the real work ( Im still sourcing some stuff actually). I have a high pressure weber pump, will this do for the weber carbs?
dreamgts
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2 PORSCHE 924 (CURRENT PROJECTS)
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Rocco R16V · Joined: 03 May 2009 Posts: 497 Location: PNW

I would use something like this in the stock location
fuel pump link
you dont want to use a high preesure efi pump with carbs. Dont forget the fuel pressure regulator (FPR) needs to be for carbs also.
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"Government exists to protect us from each other. Where government has gone beyond its limits is in deciding to protect us from ourselves. "
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DOCO · Posted: Fri Jan 29, 2010 11:01 pm Post subject:

you want to use a low pressure pump for webers. im useing a 2 to 6 lb pump that is adjustable.i did get your pm but just havent replied yet as i have not done the work.its to cold outside and springs coming!!anyway ill be removeing the old fuel pumps at rear and will be puting my pump at this location.i will use original fuel lines,one only for the fuel delivery,no need for rreturn.replace the original fuel filter and mount a nice custom see through one there.maybe a gauge after the filter.will be useing original wiring and wire up pump to that.there are some pictures coming my way of anouther install,when he gets time.i will ask him again.someone also asked about linkage,again havent got that far but will be soon looking at them and desiding what to do there.i have a good idea but i want to see if i can make it work first.im puting the pump at the rear of car as it will be easier for pump to push than pull.
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Doco "where am i going and why am i in this handbasket"author unknown
79 924 N/A "Webster"
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"WEBB STR"

brupska · Joined: 27 Aug 2009 Posts: 150 Location: Indiana

I am glad I am on this board!!! I am doing the weber install too. I didn't know I needed to change my fuel pump. I do have a regulator to insall. I was gonna try plugging up the old return line and using the old pump. If doesn't work then I will get one that is in the link above. Thanks guys Brad

Rocco R16V · Joined: 03 May 2009 Posts: 497 Location: PNW

the regulator should have a provision for return, if not you can add a restrictor to the return line but dont eliminate it. lots of old carb set-ups dont have a return, but its better for pump life to have one.

the high pressure CIS pumps would absolutley need a return line if used with a carb regulator. life would be measured in minutes if not.
_________________
"Government exists to protect us from each other. Where government has gone beyond its limits is in deciding to protect us from ourselves. "
Ronald Reagan

brupska · Joined: 27 Aug 2009 Posts: 150 Location: Indiana

What kind of ristricter can I install? I am gonna try it with out for awhile.

brupska · Joined: 27 Aug 2009 Posts: 150 Location: Indiana

How bout intalling a T fitting before the pressure regluator. One line will go to the reg. the other will go back to the pump return?

dreamgts · Joined: 29 Dec 2009 Posts: 504 Location: malta

Rocco R16V · Joined: 03 May 2009 Posts: 497 Location: PNW

what car? did it have cis?
the FPR needs to match what the carbs want.
_________________
"Government exists to protect us from each other. Where government has gone beyond its limits is in deciding to protect us from ourselves. "
Ronald Reagan

brupska · Joined: 27 Aug 2009 Posts: 150 Location: Indiana

Its a 1981 Weissach edition. The CIS was a basket case. The previous owner took it apart becasue the fuel dizzy was filling up the engine with fuel. I took it the rest of the way out and purchased a Redline Weber kit k294 off ebay that was brand new in the box $660 not bad. The linkage is the only real problem. I stole the throttle cable perch from the CIS and put it on the front of the stack bolt. Now I just need to fabricate a bell crank to push the carbs down instead of mounting a longer cable install. I will try this first then go to a longer cable for $40 From CSR . I am sorry I don't know the abbrviation for FPR. LOL

Rocco R16V · Joined: 03 May 2009 Posts: 497 Location: PNW

FPR = fuel pressure regulator
_________________
"Government exists to protect us from each other. Where government has gone beyond its limits is in deciding to protect us from ourselves. "
Ronald Reagan

brupska · Joined: 27 Aug 2009 Posts: 150 Location: Indiana

lol ok Yes the FPR is a adjustable one for 1 to 5 psi. I am sorry I am not used to that abbriviation!! The manual says to run 2psi unless you are racing then 3 psi.

dreamgts · Joined: 29 Dec 2009 Posts: 504 Location: malta

brupska · Joined: 27 Aug 2009 Posts: 150 Location: Indiana

I am fitting a aftermarket one on. It is a spectre one with a dial on the face of it to adjust the pressure.