zedsn Posted June 8, 2009 Share Posted June 8, 2009 I am having problems getting my 260z to redline and some helpful people have mentioned that it might be fuel related. My pump at the block is fine but I may want to replace my rear electric externally mounted pump and wanted to know what my options are and the best route to go. Also need to know what psi pump to look for? 2-4 or 3-6 psi. Any help would be appriciated. Quote Link to comment Share on other sites More sharing options...
MikeBZ Posted June 8, 2009 Share Posted June 8, 2009 Try a Carter CRT-P4070,or a similar pump. I use this one with a regulator and no front pump on the head. 4-6 psi is good for the SU's. Check your float level on the carbs to. Quote Link to comment Share on other sites More sharing options...
sweetride2go Posted June 8, 2009 Share Posted June 8, 2009 You might check the little filter screen in the suction side of the pump first. I've seen those pretty nasty before, and I could only imagine that they must inhibit the flow somewhat. Of course, those might just be on the 280's, I am not sure... Cheers Ryan~ Quote Link to comment Share on other sites More sharing options...
zedsn Posted June 9, 2009 Author Share Posted June 9, 2009 Hi, where did you mount the carter? At the back where the electric pump is or in the engine bay area? Quote Link to comment Share on other sites More sharing options...
MikeBZ Posted June 9, 2009 Share Posted June 9, 2009 I mounted it near the tank where the electric one would be on your car. I put a filter before the pump and one close to the carbs. Its easier for a pump to "push" fuel than to pull it. Quote Link to comment Share on other sites More sharing options...
LowCarbZ Posted June 10, 2009 Share Posted June 10, 2009 Gotta ask because I was wondering this, why on the 260Z is there a need for a mechanical pump at the block and an electric one at the tank? Other than possibly the obvious answer or additional fuel pressure. Any reason I couldn't toss a higher flow rate electric pump in there and ditch the mechanical pump and use a block off plate? (Which by the sounds of it is what MikeBZ did. Any dis-advantage to this? Quote Link to comment Share on other sites More sharing options...
zedsn Posted June 10, 2009 Author Share Posted June 10, 2009 other than added fuel pressure I have read that they were trying to take care of vapor lock by adding the electric pump at the back. Quote Link to comment Share on other sites More sharing options...
zedsn Posted June 10, 2009 Author Share Posted June 10, 2009 If you get rid of the mechanical pump and put on a electric pump other than having to add an on or off switch should be easy or you could add 260z relays that turn the pump on or off. Off at 0 rmps on at 400 rpms. Quote Link to comment Share on other sites More sharing options...
MikeBZ Posted June 10, 2009 Share Posted June 10, 2009 Gotta ask because I was wondering this, why on the 260Z is there a need for a mechanical pump at the block and an electric one at the tank? Other than possibly the obvious answer or additional fuel pressure. Any reason I couldn't toss a higher flow rate electric pump in there and ditch the mechanical pump and use a block off plate? (Which by the sounds of it is what MikeBZ did. Any dis-advantage to this? Yeah I ditched the mechanical pump on the head and just use an electric pump near the tank. I dont know why a 260Z would need two pumps. If you put on a higher flow electric pump you'll need to add a regulator. Disadvantages might be- heavier electrical draw on battery, noise of pump, or if the pump fails you wont have the mechanical one to get you home. (none of these reasons would prevent me from just having the elec pump out back) Quote Link to comment Share on other sites More sharing options...
srgunz Posted June 12, 2009 Share Posted June 12, 2009 The 260Z carbs will not even come close to using the fuel that the factory electric pump puts out. Before you change it pull the bottom cover off it, clean it out and replace the internal filter. Most do not even know there is a filter inside the pump itself. Then road test again. Quote Link to comment Share on other sites More sharing options...
waddiejohn Posted June 12, 2009 Share Posted June 12, 2009 I bought a Mr. Gasket pump at Auto Zone and tied in where the old electric pump was at and eliminate the mechanical. I've had zero problems and have done this on two cars now. Quote Link to comment Share on other sites More sharing options...
zedsn Posted June 12, 2009 Author Share Posted June 12, 2009 I will check the screen. What does the Mr. Gasket pump put out 4-6 psi and did you put a regulator up stream as well? How long has the Mr. Gasket pump been in service for? Quote Link to comment Share on other sites More sharing options...
waddiejohn Posted June 13, 2009 Share Posted June 13, 2009 Actually it wasn't a Mr. Gasket, it was a Purolator, model Pro 59SV. The package says it is 6 to 8psi, 32gallons per minute. I didn't use a regulator and have had no problems at all. It has been on the car about one year now. I paid about $70.00 for if I recall correctly. It was in that neighborhood anyway. Good luck with your ride, Waddie Quote Link to comment Share on other sites More sharing options...
zedsn Posted June 13, 2009 Author Share Posted June 13, 2009 Hi Waddie and all the others with their imput. I appriciate it and am pointed in the right direction I think. Quote Link to comment Share on other sites More sharing options...
srgunz Posted June 14, 2009 Share Posted June 14, 2009 I will check the screen. Doesn't have a screen. It has a replacable disposable filter. Quote Link to comment Share on other sites More sharing options...
zedsn Posted June 14, 2009 Author Share Posted June 14, 2009 Thanks for the imfo. Quote Link to comment Share on other sites More sharing options...
ezzzzzzz Posted June 15, 2009 Share Posted June 15, 2009 If you're not going to purchase a stock Nissan pump then get an early RX7 pump (for the carbureted rotary). That's what I run. It fits well in the stock rear location. It puts out a solid 4 psi and is exceptionally quiet unlike many other external pumps. Quote Link to comment Share on other sites More sharing options...
zedsn Posted June 16, 2009 Author Share Posted June 16, 2009 When you ran the RX7 fuel pump did you retain the stock mechanical pump or are you running the electric pump only? Did you run a filter before the pump or is there one built in? Quote Link to comment Share on other sites More sharing options...
SHO-Z Posted June 16, 2009 Share Posted June 16, 2009 If I remember right the electric pump only runs while starting the engine and is tied into the hot wire to the starter solenoid. My Z sits for months at a time. I have an electric pump back by the tank and have a separate switch to recharge the fuel system so the engine does not have to crank forever to start. Quote Link to comment Share on other sites More sharing options...
skib Posted June 16, 2009 Share Posted June 16, 2009 on my 73 the electric pump stays on all the time and turns on when the key is on accessory. I have my new fuel pump for the turbo set up mounted there and used the stock wiring. Quote Link to comment Share on other sites More sharing options...
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