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Discussion Starter #1
How do you ad an external high flow fuel pump to our cars using the sock fuel tank?
On an adjustable fuel pressure regulator, how do you adjust the pressure, do you open it up and turn something, or does it set its self?

I ask these questions cause I see them in Jegs and summit and I try to imagine how they work but I cant get past the install process, I am not asking for in depth instructions on the fuel pump question I just wanted to know generally, I am sorry for some of my silly questions, I went to school at tstc in waco and graduated the automotive program but they taught me to be a parts swapper not a fabricator and a performance specialist, I under stand how alot of thing work and how to diagnose alot of things, but as with anything if you dont use it everyday and practice you lose a lot of knowledge and have to rely on common sense at best. Any way I appreciate any info on this, I have an adjustable fuel pressure regulator for my 97 with a 255 lph pump and stock injectors, so I would like some details on the regulator. Thankyou, so much guys.
 

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FYI. - From the Technical Articles

Crank up the fuel pressure (EFI engines only)
Increasing the fuel pressure on an otherwise stock engine (by by going to an aftermarket regulator) is a bad idea. Within limits, the EEC-IV will compensate for the excess fuel by reducing the injector duty cycle. Beyond this, it will give up and resort to "limp home" mode, in which your engine will run like dog meat. Modified engines sometimes require additional fuel pressure to keep up with the higher airflow, but on a stock engine you're wasting your time.

VERDICT - Don't do it.
http://www.tccoa.com/articles/overall/mods.html
 

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Discussion Starter #3
thankyou for that info but I have pi cams on ported non pi heads, k&n filter, removed air box too. I also have a sct switch chip for these mods on 87 and 93, no egr and o2's with no cats and true dual exhaust at 2.5 in pipe, the chip is programmed to this too. Any way it has a 255 lph pump the car is not completely stock oh and it has a pi intake too. I should have included this but I felt it was not needed till I read that. Thanks man Oh and the transmission is j-modded with a mark 8 converter, and a transmission cooler too I have traction lock too. well thats it all laid out.
 

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There is no need to bump up the pressure, even with the mods you have. You are still very far away from needing to pump up the amount of fuel. Besides, if it gets to the point where you need to increase the fuel pressure beyond the stock setting, you need bigger injectors.

But, to answer your question, to adjust the pressure you need to have the engine or fuel pump running. Remove the vacuum line to the regulator and adjust the pressure to what you want, then set the stop nut and reconnect the vacuum line.
 

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Discussion Starter #5
cool thanks for the info yeah I never put it on I was just curious about how to set them I was planning on putting it on when I do my ported pi heads with my comp cams that I have, I was gonna put some big fuel injectors on once I get a new maf and rebuild the motor, but I prefer to buy my parts when I can so I can save them for the build. I will admit I was thinking of putting the regulator on, but since I didnt know alot about it I wanted to do my research and obviously it paid off, thanks for the info.


So now if I could get the first question answered, I thought the external pump would go before the fuel filter one that could withstand the pressures, and you would have to use AN fittings and line, but to us the stock tank would you leave the sending unit in and cut the lines to get them AN fittings or would you close the original lines on the sending unit off and make new holes for the AN fittings? Also this brings me to ask how people put to fuel pumps in our gas tanks and make them work? Can our gas tanks stand up to the pressure of bigger and stronger fuel pumps or 2-255 lph fuel pumps? Also does 2 fuel pumps really make a difference, they still send just as much gas at the same time or do they feed one side of injectors for each pump? Well I know its alot of questions but I am just interested in knowing.
 

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What are your future plans? If it's just PI heads and some cams, you don't need to upgrade anything. If you want some security or peace of mind, you can upgrade the fuel pump. But your 19# injectors will sustain you to 300 rwhp. Bigger injectors and a fuel pump won't gain you anything.
 

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Discussion Starter #7
What are your future plans? If it's just PI heads and some cams, you don't need to upgrade anything. If you want some security or peace of mind, you can upgrade the fuel pump. But your 19# injectors will sustain you to 300 rwhp. Bigger injectors and a fuel pump won't gain you anything.
I really dont know yet what my plans are it all matters on how long my job last and if I go with torktechs sc which would reqire a full rebuild, as it sits I doubt I will go over 300 hp thats alot of power. Basically I will only need the regulator if I gosupercharged which of course requires alot of planning and a full buildup. Thankyou, as for the fuel pump question I just want to know for knowledge I have no plans for it as of right now, I just see it in summit and I try to picture how it would work but I cant get past the tank part other than a seperate fuel cell.
 

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Discussion Starter #9
well I doubt I will run more than 300 like I said thats alot of power from a 2 valve but I am still curious about the external pump, I am sure you just have to use a fuel cell but it would be cool if you ran a cobra 4 valve non return fuel system and kept your factory tank and sending unit any way I am sure it can be done I just thirst for the knowledge.
 

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Bet you didn't know you can't ask a question here without people telling you your business. But master486 is right. the 255 with the BAP is the easiest/cheapest way without going fuel cell. I believe its even better than adding an inline pump.
 

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Discussion Starter #11
no it doesnt bug me I was just curious about the external pumps if they could be used on factory gas tanks, any way I am figuring an external fuel pump will need a fuel cell. I dont take offense to any of this cause it helps me out.
 
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