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Old 10-30-2001, 05:26 PM   #1
BADWRX
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Question 300ZX Twin Turbo Fuel pump Question.

Will it fit into our cars as a simple replacement like the Supra pump?

I do not want to buy it until I am sure.

Thank you very much for all of your help.

Andy
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Old 10-30-2001, 05:45 PM   #2
Conduit
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If we can find out if the 300ZX pump is a straight bolt-in on Supras, then we would know. Any of the Supra boys here care to comment?

Last edited by Conduit; 10-30-2001 at 05:57 PM.
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Old 10-30-2001, 06:22 PM   #3
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I know of some that are using the 300ZX fuel pump, but never looked into it since I already had 1 in all my Zs =). Here is cut and pasted from the Supra forums:

"The Z pump is one of the best stock pumps out there. Clark at Jim wolf says he has seen 750hp with only one with no signs of pressure drop. We have installed two of them in supras, so yes to your question, they do fit. They require a little work on the pick up, but no big deal. Its not hard at all, the pickup on the z is connected to the pump with a hose that just needs to be shortened. Someone already has flow tested it, I saw the results a while back and they were outstanding."
-Sound Performance


Also, one of the pluses some mention is it being so quiet. I know under full boost, my 300ZX fuel pump used to hold a high 60's PSI.
My question: being new to the WRX, how easily does the Supra pump fit the WRX?
I'm sure the 300ZX one would be a better choice since it's easier to get ahold of and cheaper. With an added, probably never needed, bonus of flowing more.
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Old 10-30-2001, 06:43 PM   #4
Conduit
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I would definetly make sure that the FPR can handle a pump like that. The Sard would seem mandatory at that level. I would love to be able to use this pump, they are very very common!

What we also need is some description of what exact modification is needed to fit either of these pumps. Shortening pickups, etc.

Also keep in mind that the PE is 350, so we need to keep costs below that (it doesn't flow as much, 210). I know the Supra pump is 255, any knowledge of what he Z's pump flows?
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Old 10-30-2001, 08:12 PM   #5
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All the info I have is the following:
at 12 VOLTS and 43 PSI:
VR-4 = 180
RX-7 = 210
Supra = 260
Skyline = 310

All are measured in lph and on the latest models. I have never been able to find what the 300ZX pushes, but theory is that it will do about what the skyline does. All I know for sure is nobody has contested it flowing more than the Supra pump.
It's hard because many are rated at more than 12 volts or a different PSI. Also, people get Liters and Gallons confused.
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Old 10-30-2001, 09:51 PM   #6
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It is only $250! That is krazy cheap!

I guess that I am going to get it and see if I can't get it in there!

Andy
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Old 10-30-2001, 10:34 PM   #7
BADWRX
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How difficult is a Fuel Pump to replace???

I am curious. I really have no clue!

Andy
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Old 10-31-2001, 10:51 AM   #8
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It shouldn't be too hard. Unbolt the old one, install the new one. You have to be sure to get the pickup right, or you are out of luck. Oh, and you have to depressurize the fuel system (obvious) but not necessarily straightforward if you have never done it.

Given Nissan's tendencies, I could see it being essentially the same pump as the skyline pump. They always seem to go hog wild on fuel components.
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Old 10-31-2001, 02:25 PM   #9
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It's easier and a much shorter job then say...replacing an up-pipe :monkey: . Hated that job. To depressurize, just take off the gas cap. Take out the bottom section of the back seat. Disconnect the pump electrical connection. Unbolt the top of the pump assembly, it seals the tank and holds the pump. Pull out the assembly. Disconnect the internal connector on the pump. Take the fuel pump off the rail. Installation is the reverse of dis-assembly. Simple.

Ken
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Old 10-31-2001, 02:29 PM   #10
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BTW, the fuel pump in the Z is a Bosch unit. It costs 350+ dollars new from CarParts.com
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Old 10-31-2001, 02:31 PM   #11
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Supra owners want that fuel pump so it must be good.
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Old 10-31-2001, 02:35 PM   #12
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That explains it, bosch pumps are the ish, good for what ever PSI you dare to throw at them. And reliable as heck.

Ken
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Old 10-31-2001, 02:36 PM   #13
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Old 10-31-2001, 02:59 PM   #14
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On my supra I used twin stock supra pumps zip-tied together.

Im checking a sourse for a buy on Supra pumps...let me see if I can get the price down below $250 with filter.

Personally..I would never buy a used fuel pump..but thats just me...I dont need any flames ;-)

Greg
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Old 10-31-2001, 03:22 PM   #15
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I'm with you on that Greg, not down with used pumps.
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Old 10-31-2001, 03:26 PM   #16
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who said used?
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Old 10-31-2001, 03:28 PM   #17
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No, courtesy Nissan quotes 257 for a NEW pump!

Andy
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Old 10-31-2001, 03:36 PM   #18
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Quote:
Originally posted by SACTOWNREXMAN
No, courtesy Nissan quotes 257 for a NEW pump!

Andy
No no no andy....i know 257 is for a new pump. I was just saying that in general i would never buy a used fuel pump because some people posted that they are gonna get one from a junk yard

The power is down at the place with the Supra fuel pumps...im gonna see what i can do when the power comes back up. I want the price to be less than $200.00 with a new fuel filter that goes on the pump...i'll try

Greg
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Old 10-31-2001, 03:46 PM   #19
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Just as Long as i get better gas mileage than a 300zx I won't be too upset.

I just want to be able to hit about 350 hp's for now... Hell Al Hit 331 without upgrade any part of the fuel system. But he did have a better Intercooler.

I wonder with a FPR and Fuel Pump running a little more Fuel pressure what can the peak horsepower end up as Until I get my bonus check for those STI or Better Injectors.

little
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Old 10-31-2001, 03:49 PM   #20
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Im not sure whats the limits are on the stock fuel pump...but i have been told that it is very weak.

You dont wanna mess around with the fuel :-)

Im on hold right now...i'll post the price under a new thread for anybody who is interested. Maybe the guy who upgraded to the Supra pump could tell us what is involved

Thanks

Greg
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Old 10-31-2001, 04:09 PM   #21
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Unless you are raising the fuel prssure, why would do you think there be any benefit to having a higher capacity pump? With the stock pump the vast mjority of the fuel being sent to the fuel rails is being returned to the tank unused. A higher capacity pump will have a tendancy to heat the fuel (and itself) more as well - especially as you get to the bottom of the tank.
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Old 10-31-2001, 04:11 PM   #22
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who said anything about fuel pump without raising the Fuel pressure?
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Old 10-31-2001, 04:13 PM   #23
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http://i-club.com/forums/showthread....hreadid=108893

Cobb tuning told me that the stock fuel pump/injectors are only good for about 350 crank horsepower. This is why you would want an upgraded fuel pump and injectors.

I have not done any research...this is just what I was told and a few members have already upgraded to a Supra fuel pump.

So, in doing my good deed for the month, im trying to get a good price on the fuel pump for us

Greg
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