2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

fcd or fuel pump?

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Old Jan 13, 2004 | 02:29 AM
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fcd or fuel pump?

Here is my dilema. I've heard people saying that you should get an FCD then once you have more mods get a fuel pump. Others say to get a fuel pump first, then get a FCD. What do you guys think? I don't wanna blow my motor, but i also don't want to spend on something i don't need. I have an s4 TII all stock. Thanks in advanced
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Old Jan 13, 2004 | 02:42 AM
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Re: fcd or fuel pump?

Originally posted by knightkarr
Here is my dilema. I've heard people saying that you should get an FCD then once you have more mods get a fuel pump. Others say to get a fuel pump first, then get a FCD. What do you guys think? I don't wanna blow my motor, but i also don't want to spend on something i don't need. I have an s4 TII all stock. Thanks in advanced
I always do these three mods first, and all at the same time:
-Port wastegate
-fuel pump
-fcd
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Old Jan 13, 2004 | 02:53 AM
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does the turbo have to be removed to port the waste gate? I've heard some people port it by themselves, is there a writeup?
Thanks
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Old Jan 13, 2004 | 03:02 AM
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Originally posted by knightkarr
does the turbo have to be removed to port the waste gate? I've heard some people port it by themselves, is there a writeup?
Thanks
Yes, it must be removed.
Ted has a good website for porting... but I can't seem to load www.fc3s-pro.com.
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Old Jan 13, 2004 | 03:03 AM
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step one boost gauge.

both the FCD and fuel pump are useless with just those 2 things... I'm asuming you plan on doing other stuff after?
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Old Jan 13, 2004 | 05:49 AM
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From: n
http://fc3spro.com/TECH/FM2W/power.htm

Take out the "-"


-Ted
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Old Jan 13, 2004 | 12:41 PM
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What are the tools needed for porting the wastegate?
Thanks
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Old Jan 13, 2004 | 01:26 PM
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Harry Porter !!
j/k
https://www.rx7club.com/showthread.p...hreadid=212537

https://www.rx7club.com/showthread.p...hreadid=204659

search yo
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Old Jan 14, 2004 | 01:04 AM
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thanks sub9lulu,

you guys know what lph is the stock pump? And if i get a 255, will it increase my gas mileage at normal driving?

Thanks

-Carlos
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Old Jan 14, 2004 | 01:06 AM
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Well in your sig it says you are all stock. If you get a high flow fuel pump you will run rich and probably get a little worse gas mileage.
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Old Jan 14, 2004 | 03:28 AM
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Originally posted by ilike2eatricers
Well in your sig it says you are all stock. If you get a high flow fuel pump you will run rich and probably get a little worse gas mileage.
ok. Doesn't the ecu control the flow though? I mean, when the o2 sensor reads rich, doesn't it regulate the fuel pressure?

Thanks
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Old Jan 14, 2004 | 11:45 AM
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I believe the o2 sensor only helps on highway cruising speeds. It puts the ECU in loop mode so you dont use more fuel than you need. Not sure if I had all the details correct or not. Anybody wanna back me up or correct me?
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Old Jan 14, 2004 | 12:08 PM
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oh yeah, your right. shoot, then as long as i'm hot running at highway constant speed, then i'll be running rich.
Thanks
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Old Jan 14, 2004 | 01:20 PM
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if your gonna get one of em go with the fuel pump first just so u wont have to do it later. when your stock there is not much use for an fcd . but be sure to get the fcd when you get an exhaust because u will get boost creep and port that wastegate


a safc wouldn't hurt either
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