1986 N/a Rx-7 With 1987 Turbo 2 Fuel Pump?
the fuel pump went out in my 1986 rx-7 n/a, so i put the brand new fuel pump out of my 1987 turbo 2 car in the n/a. is this going to cause any problems? will it make it run rich or burn more fuel? also when i corner the car real hard to the left no matter how much fuel i have in the 13 gallon tank the car cuts out until the car levels out. is this the pump? does anyone else have this problem? how do i fix it--jeremie
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Originally Posted by ectonine
will it make it run rich or burn more fuel?
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someone mentioned that no matter what fuel pump you have in there the fuel pressure regulator isn't going to let the car use more fuel. whats this?
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I am running TII pump in my NA car now and gas mileage or driveability is not affected by it at all. Old stock TII pump is not that strong to overrun FPR.
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Originally Posted by ectonine
someone mentioned that no matter what fuel pump you have in there the fuel pressure regulator isn't going to let the car use more fuel. whats this?
That said, if you got an aftermarket regulator or fuel comp, you'ld be fine... |
That is completely wrong. The FPR only alters fuel pressure relative to manifold pressure. It cannot compensate for changes in upstream fuel pressure. If you increase fuel pump pressure (and doing this will), you'll increase fuel rail pressure. Simple as that.
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damn nz! you're getting serious! i had to read your thread a couple times to understand hahaha. anyone got a stock n/a pump for me? my girlfriends from new zealand.
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Originally Posted by ectonine
someone mentioned that no matter what fuel pump you have in there the fuel pressure regulator isn't going to let the car use more fuel. whats this?
Oh yea, I just got back from playing hockey ectonine and I feel fantastic! |
Originally Posted by NZConvertible
That is completely wrong. The FPR only alters fuel pressure relative to manifold pressure. It cannot compensate for changes in upstream fuel pressure. If you increase fuel pump pressure (and doing this will), you'll increase fuel rail pressure. Simple as that.
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HAHAHAH! THE PLAQUE IS BACK!!! thanks for your help, and thanks for not blasting me about the damn search button. i'm honestly trying to read more and find things myself. its just hard being the new guy and everyone giving you shit. i apologize to you but icemark and i are gonna rumble--jeremie
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Originally Posted by ectonine
damn nz! you're getting serious!
Having said that, Kentheth isn't right. The FRP doesn't work on a percent. It keeps the fuel pressure a fixed pressure above the manifold pressure (~37psi higher in our case), so that injector flow is constant. |
All the banter about pump differences has clouded a symptom ectonine has described "when i corner the car real hard to the left no matter how much fuel i have in the 13 gallon tank the car cuts out until the car levels out". That sure is a classic symptom of a dirty/clogged fuel pump sock. Maybe we should discuss that before he goes out and get a new pump?
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Originally Posted by ectonine
HAHAHAH! THE PLAQUE IS BACK!!! thanks for your help, and thanks for not blasting me about the damn search button. i'm honestly trying to read more and find things myself. its just hard being the new guy and everyone giving you shit. i apologize to you but icemark and i are gonna rumble--jeremie
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Originally Posted by NZConvertible
Having said that, Kentheth isn't right. The FRP doesn't work on a percent. It keeps the fuel pressure a fixed pressure above the manifold pressure (~37psi higher in our case), so that injector flow is constant. errmmm.. yeah. Well thats what I meant anyhow. Made sense to me, but maybe I have the physics of the regulator confused, will it always hold the 37psi even if it has a changing pressure feeding it? |
Originally Posted by Jodoolin
All the banter about pump differences has clouded a symptom ectonine has described "when i corner the car real hard to the left no matter how much fuel i have in the 13 gallon tank the car cuts out until the car levels out". That sure is a classic symptom of a dirty/clogged fuel pump sock. Maybe we should discuss that before he goes out and get a new pump?
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get a SAFC and tune it
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Originally Posted by ectonine
i have in the 13 gallon tank the car
There is only a 16.6 gal tank (86-88) or a 18.5 gal tank (89-92). And the cutting out (as again covered in the FAQ for FC sticky thread- when will you start reading it???) is related to a dirty fuel pump sock. Replacing the pump with the wrong one will only make your fuel usage problems increase, while your power will decrease. |
thats what i thought about the 16.6 gallon tank but for ome reason my tank holds thirteen gallons, thirteen and a half if i really squeeze it in there.
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advance auto parts and autozone here in my town say the turbo fuel pump and the non turbo fuel pump are the same part. well they tell me the part number is the same for both--jeremie
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The Mazda parts are different. Your auto parts store probably just stocks a generic pump that fits all.
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Originally Posted by ectonine
thats what i thought about the 16.6 gallon tank but for ome reason my tank holds thirteen gallons, thirteen and a half if i really squeeze it in there.
No such thing as a 13.5 gallon tank in a RX-7. |
the light doesnt work in my car. i am filling it up when i run it completely out of gas and have to push it into the gas station. it only take 13.5 gallons at the very most everytime i fill it up--jeremie
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Originally Posted by Kenteth
I figured I was off a bit, but what I meant was that if its set at 37 psi line pressure at...say 40psi pump pressure, having 60 psi pump pressure will increase the line pressure at a constant ratio...
...will it always hold the 37psi even if it has a changing pressure feeding it?
Originally Posted by ectonine
i am filling it up when i run it completely out of gas and have to push it into the gas station. it only take 13.5 gallons at the very most everytime i fill it up--jeremie
BTW, I really hope you don't let it run out of gas often (as you imply), as this will quickly kill the pump. |
two or three times to see what i am getting from top to bottom. one tank driving hard all the way through, one shifting at no more than 2,000 all the way through, and another half and half--jeremie
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Originally Posted by hIGGI
(Post 4062541)
I am running TII pump in my NA car now and gas mileage or driveability is not affected by it at all. Old stock TII pump is not that strong to overrun FPR.
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