mpresley Posted January 8, 2012 Share Posted January 8, 2012 I got a 2.8 with a P79 head for my 240Z and when I cleaned the head and got ready to take it to machine shop I discovered there is no hole for the fuel pump. Can I just drill one? MP Quote Link to comment Share on other sites More sharing options...
Heroez Posted January 8, 2012 Share Posted January 8, 2012 (edited) You can add an electric pump. On a 73 there is a spot for it by the fuel tank. Edited January 8, 2012 by Heroez Quote Link to comment Share on other sites More sharing options...
surpip Posted January 8, 2012 Share Posted January 8, 2012 I’m assuming since you want the mechanical pump you are going with the carb set up? if you go with a stock 280 pump you will need a regulator with a bypass to keep the pump cool but you would probably be better off with a holly blue or something similar with a deadhead regulator. but as hero said i belive on the 240 Pass side there is a mounting spot an i think the wireing is there too, but it would be under the carpet, Green wire i think? Quote Link to comment Share on other sites More sharing options...
Heroez Posted January 9, 2012 Share Posted January 9, 2012 (edited) Since we dont know what year his car is, Im going to assume its a 73. 73-74 had both mechanical and electric fuel pumps. Wiring in an electric pump incorrectly can be dangerous. Edited January 9, 2012 by Heroez Quote Link to comment Share on other sites More sharing options...
BluDestiny Posted January 9, 2012 Share Posted January 9, 2012 I just deleted the Mechanical pump on my 260z and ran a cheapo low pressure electric fuel pump in the spot heroez is talking about without changing any wiring. It feed triple webers with no problems. Quote Link to comment Share on other sites More sharing options...
mpresley Posted January 9, 2012 Author Share Posted January 9, 2012 Since we dont know what year his car is, Im going to assume its a 73. 73-74 had both mechanical and electric fuel pumps. Wiring in an electric pump incorrectly can be dangerous. I should have stated that it is a 1971. MP Quote Link to comment Share on other sites More sharing options...
Heroez Posted January 10, 2012 Share Posted January 10, 2012 In that case you will have to make a spot. Placed nearest to the tank is best. Quote Link to comment Share on other sites More sharing options...
mpresley Posted January 10, 2012 Author Share Posted January 10, 2012 In that case you will have to make a spot. Placed nearest to the tank is best. So I can't drill out the hole and use the mechanical one? MP Quote Link to comment Share on other sites More sharing options...
Jefferson71 Posted January 10, 2012 Share Posted January 10, 2012 So I can't drill out the hole and use the mechanical one? MP Yes, it will work fine. The area you need to remove for the mechanical pump to work is recessed. Quote Link to comment Share on other sites More sharing options...
mpresley Posted January 10, 2012 Author Share Posted January 10, 2012 Yes, it will work fine. The area you need to remove for the mechanical pump to work is recessed. Thank you. I will try not to screw it up. Quote Link to comment Share on other sites More sharing options...
Heroez Posted January 11, 2012 Share Posted January 11, 2012 Be sure to post a photo and let us know how it goes. Quote Link to comment Share on other sites More sharing options...
surpip Posted January 11, 2012 Share Posted January 11, 2012 Good luck! go slow an use alot of grease to catch shavings Quote Link to comment Share on other sites More sharing options...
beermanpete Posted January 11, 2012 Share Posted January 11, 2012 Why not just use a timing cover from an early model? Quote Link to comment Share on other sites More sharing options...
surpip Posted January 11, 2012 Share Posted January 11, 2012 I'm assuming for cost, drilling is cheaper. Quote Link to comment Share on other sites More sharing options...
19762802+2 Posted January 11, 2012 Share Posted January 11, 2012 I did this on my p79 head I run the mechanical to feed my SU's and a booster pump near the tank which I only run when I'm on the highway or feeling frisky . Drill it out and run it, don't forget the oliptical washer and bolt on the cam to run the fuel pump. Quote Link to comment Share on other sites More sharing options...
19762802+2 Posted January 11, 2012 Share Posted January 11, 2012 Why not just use a timing cover from an early model? The mechanical Fuel pump attaches to the cylinder head not the timing cover. I believe the only difference in the timing covers is the timing degree marks and distributor mount both which are interchangeable. Quote Link to comment Share on other sites More sharing options...
blue72 Posted January 11, 2012 Share Posted January 11, 2012 I've done this also. Just had to be very careful to keep all aluminum shavings out of the engine. I actually did mine with the head on a bench and all of the valvetrain tightly wrapped and taped. Took a big drill bit to make some pilot holes and enlarged it with a Dremel until the fuel pump arm fit through with no interference. It works just fine. I'm running overbored SUs with no problems except for vapor lock in the summer, so eventually it will get an electric pump back by the tank too. Quote Link to comment Share on other sites More sharing options...
Lazeum Posted January 11, 2012 Share Posted January 11, 2012 Braap did that on my head but I found out mechanical pump was not able to keep up... Before After Quote Link to comment Share on other sites More sharing options...
mpresley Posted January 11, 2012 Author Share Posted January 11, 2012 Braap did that on my head but I found out mechanical pump was not able to keep up... Before After Thank you for help. I have head off and am going to take it to machine shop so particles won't be a problem. I have triple webbers but don't think I will put them on since I would like to get more than 10 mpg. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted January 11, 2012 Share Posted January 11, 2012 Thank you for help. I have head off and am going to take it to machine shop so particles won't be a problem. I have triple webbers but don't think I will put them on since I would like to get more than 10 mpg. Don't think of it as "MPG", think of it as number of laps. Quote Link to comment Share on other sites More sharing options...
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