Fuel pump question

[Logan's 240Z]

Does the 240z have an electric and mechanical fuel pump? The mechanical at the engine and the electric near the gas tank? I'm posting a photo of the rear pump? in question.Any info on rebuild or repair of this greatly appreciated.I'm doing a complete restoration and you guys are teaching me as I go,thanks again,Roger

[Logan's 240Z]

Forgot to add photos of pump,here they are

[=Enigma=]

The electric fuel pump was added to many of the 73 & 74's as one part of a multi-step fix to address problems with vapor lock. This was very common on these cars and mostly related to the dreaded flat top carbs these cars received here in the US. This is documented pretty well here in the forums and elsewhere. Use the search feature or check out the following:

http://www.zhome.com/ZCMnL/tech/73Mods.html

or

1973 & 1974 Fuel System Mods.pdf courtesy of XenonS30.com

Edited June 9, 2009 by =Enigma=

[myfairlady]

I have one in my 73 in the rear as well. But what was the psi on those pumps cause mine is bad and want to buy a different one. Im still using mechanical in the front

[=Enigma=]

According to the 73-74 mod guide fuel pressure should read 3.4 to 4.2 lbs @ 1000 rpm at the fuel inlet line to the carb, so any pump that can put our between 3-5 lbs would be ideal. With such a small range a fuel pressure regulator would be a good idea when using anything other then a stock pump or one with a known output in this range. The round tops might be a little less sensitive to fuel higher pressures but I believe 5 lbs is as high as you want to go.

Edited June 9, 2009 by =Enigma=

[myfairlady]

awesome man thanks alot.. Since I live in Las Vegas I need electical one in the real so that I dont have vapor lock.