Fuel pump psi for streetport/stock?
#1
35r 13b first gen
![](/images/misc/20_year_icon.png)
Thread Starter
iTrader: (3)
Join Date: Apr 2002
Location: Richland Center WI
Posts: 1,290
Likes: 0
Received 0 Likes
on
0 Posts
![Unhappy](https://www.rx7club.com/images/icons/icon9.gif)
Hey guys,
I am getting a new fuel pump cuz mine failed the volume test pretty badly. If i get a 8 psi pump now with everything else stock except the engine, do i need a regulator to lower the pressure for the stock carb? or is 8 psi ok. the pump doesnt need a regulator otherwise. Also if i fail the volume test for my pump will this keep my car from running more than 3-4 seconds?
Joshua
I am getting a new fuel pump cuz mine failed the volume test pretty badly. If i get a 8 psi pump now with everything else stock except the engine, do i need a regulator to lower the pressure for the stock carb? or is 8 psi ok. the pump doesnt need a regulator otherwise. Also if i fail the volume test for my pump will this keep my car from running more than 3-4 seconds?
Joshua
#4
Porting doesn't change the how the carb works, just like porting doesn't change the compression ratio. I makes the carb thirstier for more fuel since isit's sucking more air. It needs more fuel volume, not psi.
Simple answer, yes, it will need a regulator with 8 psi.
Simple answer, yes, it will need a regulator with 8 psi.
#5
Lives on the Forum
![](https://www.rx7club.com/images/misc/15_year_icon.png)
You may be alright at 8psi. I ran my carter pump without a regulator for some time. The restrictor in the return line will actually compensate for the pressure increase (somewhat). Best I can say is try it out, but long term you should get a regulator to "make it right".
#6
Rotary Enthusiast
![](/images/misc/20_year_icon.png)
Originally Posted by zaridar
Hey guys,
I am getting a new fuel pump cuz mine failed the volume test pretty badly. If i get a 8 psi pump now with everything else stock except the engine, do i need a regulator to lower the pressure for the stock carb? or is 8 psi ok. the pump doesnt need a regulator otherwise. Also if i fail the volume test for my pump will this keep my car from running more than 3-4 seconds?
Joshua
I am getting a new fuel pump cuz mine failed the volume test pretty badly. If i get a 8 psi pump now with everything else stock except the engine, do i need a regulator to lower the pressure for the stock carb? or is 8 psi ok. the pump doesnt need a regulator otherwise. Also if i fail the volume test for my pump will this keep my car from running more than 3-4 seconds?
Joshua
If you are convinced it's a fuel issue, check float levels and clean that little screen at the fuel inlet to the carb. Has the carb been disassembled and cleaned recently? Can you keep it running by playing with the choke?
#7
Lorem ipsum dolor sit ame
![](https://www.rx7club.com/images/misc/10_year_icon.png)
Originally Posted by Kentetsu
You may be alright at 8psi. I ran my carter pump without a regulator for some time. The restrictor in the return line will actually compensate for the pressure increase (somewhat). Best I can say is try it out, but long term you should get a regulator to "make it right".
Trending Topics
#8
Lorem ipsum dolor sit ame
![](https://www.rx7club.com/images/misc/10_year_icon.png)
Originally Posted by renns
Based on that last sentence, I doubt a pump replacement will solve your problem. Even a very weak pump will provide adequate fuel flow at low engine power settings. If your fuel filter hasn't been replaced in a while, do so and re-test. You might avoid mis-spending some money.
If you are convinced it's a fuel issue, check float levels and clean that little screen at the fuel inlet to the carb. Has the carb been disassembled and cleaned recently? Can you keep it running by playing with the choke?
If you are convinced it's a fuel issue, check float levels and clean that little screen at the fuel inlet to the carb. Has the carb been disassembled and cleaned recently? Can you keep it running by playing with the choke?
Plus you're getting into things that would block the fuel flow in the carb, but he is saying the pump failed the volume test, which if done correctly it means the flow was tested before it gets into the carb.
Last edited by cdrad51; 10-07-06 at 09:48 PM.
#9
Rotary Enthusiast
![](/images/misc/20_year_icon.png)
Originally Posted by cdrad51
If the pump is badly failing, there won't be enough flow to even keep it idling. Don't ask me how I know this. So the fuel pump replacement might well solve the problem.
Plus you're getting into things that would block the fuel flow in the carb, but he is saying the pump failed the volume test, which if done correctly it means the flow was tested before it gets into the carb.
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM
Skeese
Adaptronic Engine Mgmt - AUS
65
03-28-17 03:30 PM