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Discussion Starter #1
I traced the source of my fuel problem to the fuel pump. sometime between when i pumped out the gas and when i tried to crank it, the pump must have gone dead. i have a pump from an 83ZX NA that looks exactly the same and has the same nimbers on it and everything. i know that the turbo pumps are supposed to pump to higher pressures, but is that just a function of the regulator? can anyone confirm if these things are actually the same part? can i use the NA pump without a problem?

also, the turbo pump is full of varnish/sludge. can i take it apart somewhat to clean it out? could that fix the problem?

BTW, the dealership near me wants over $400 for a new fuel pump. can you believe these people?
 

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I'm guessing that you want to do this on a 240?

Do you currently have a mechanical or electric fuel pump. If you already have an electric, you can buy a universal type electric from Kragan for like $20.00. I've got one on my '73 and it works great and it's easy to do. It looks like a cylinder about 3" long and 1 1/2" wide.
 

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Yeah, I'm a bit confused here also... is it that you are using a turbo pump for your 240 or have a turbo engine in there? I'll assume you have a turbo engine in, so I'll go from there. I can't confirm the part numbers, but can tell you that with stock boost pressure an n/a pump will work fine. When I did the turbo swap into my 79, I kept the original n/a pump in there and it worked fine with 6psi boost. I didn't go any higher so I'm not sure of the limit an n/a pump will flow, but I had no problem at the lower pressure. But then again I wasn't going to push it now that I'm hitting 10psi :) I've got a Bosch (HKS), which I got from jeffp, and it works great and will flow more than enough.
-zakaron
 

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Discussion Starter #4
this is for a 280ZXT motor swap into a 240, so i need the high pressure fuel injection pump for a turbo motor.
 

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the main question i was asking was whether the ZX turbo fuel pump is actually a different unit than the late model ZX NA. for anyone interested, i may have answered my own question. the pumps appear identical on the exterior and inside as far as i tore into it. the difference appears to lie in that the turbo pump spins faster, therefore pumping more fuel. i hooked them both up to direct power side by side and the turbo fuel pump definitely spins with a higher frequency.

cleaning out the turbo pump and giving it a good swift whack got it to work by the way. i guess i just saved myself 400 bucks!!
 

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turbo and NA pump are different....well....

kinda,

at the dealer and such they do have different part numbers.....but if you go to a plain jain autoparts store the part numbers are the same. like zakaron said....the NA pump will flow enough for stock boost...but after that i wouldnt risk it. and 400$ is way overpriced IMHO. in vic british and the likes the are 168-190$??? me thinks? anywho....for my conversion i bought a paxton kamakazi pump good for 750HP.....im sure ill never need all that pump...but i want to make sure. also bosch makes a line of universal pumps that will go into the Z bracket....i have all the part numbers and flow rates if you want em. BTW.....you in austin TX?

laterZ
-Sparky
72 240ZT
San Antonio TX....home of the 2002 Z-Nats!
 

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Discussion Starter #7
Re: turbo and NA pump are different....well....

i kind of figured it was something like that. yes, i would like those bosch part numbers as i will probably go with something aftermarket as i incerease boost also. yes, i'm in austin. do you ever come up here? i didn't see your car (or any turbo 240's) at the z car show last month? why are you turbo swap guys hiding out? i'd like to check out your car sometime. are you pretty happy with the result?
thanks, marcus
 

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Re: turbo and NA pump are different....well....

I ran 12psi intercooled with the 78 n/a pump and it worked fine. I did end up replacing it with a Vortech T-Rex 50/70 pump to be on the safe side. It's VERY loud though. I'm going to put some rubber behind it to insulate it a little. I'd get a new pump if I were you too. It's cheaper than a set of pistons.
 
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