reactor2

My setup:

98 A4 Vette
Heads, cam, intake, exhaust, supercharger (P1SC 4.25 pulley).

I've been wrestling with the fuel pump fuel lines for several hours, I've bought every "quick" disconnect tool I can find. They aren't coming off, just not going to happen. Time to look for alternatives.

With that being said. Does anyone definitively know that the stock pump WILL NOT support my setup? The stock pump had no problem with my 150 shot of NOS.

Is the Boost-a-pump a good alternative if I need extra fuel?

The LPE pump doc says it will support 600hp....how much will the stock pump support?

reactor2

Does anyone know the specs of the stock fuel pump?

I can't find this info anywhere. I wouldn't be surprised to find out that it specs out the same (flow/pressure) as the LPE unit. The LPE unit, however, has been tested at 17 volts for extended periods of time whereas the stock pump will probably burn out.

jobberone

You need a better pump and the BAP is a great idea. What injectors are you running?

reactor2

Im currently running 28# but I will be running 60#.
Would just a BAP work? I'd like to swap out the pump but I'm afraid that those fuel lines just aren't going to come off.

Does anyone know where I can find the specs on the stock pump? I know there aren folks pushing 500rwhp with the stock pump so it can't be that bad.

4SFED Z

First:
Put 60# injectors

Second:
To disconnect fuel lines leading to pump, they have little green and blue clips. Squezze the clips, place the disconnect in there and push the line in then out. It will release.

Third:
I would swap out the crappy stock pump.

jobberone

Fourth:
Add BAP

reactor2

My car is a 98, I don't have that type of disconnect for the fuel lines, I have the type that requires a special tool to disconnect. I currently own 7 of those special tools and none of them work.

I'd replace the pump if I could remove the lines, I have the LPE pump.

Seriously though, does anyone know the specs of the stock pump? Both the stock pump and LPE pump maintain 58psi, I'm curious what the stock pump flows compared to the LPE pump. My guess is that they might be the same with the only diff being that LPE tested theirs at extended periods of time at 17 volts. I might be wrong of course.

jobberone

You need to switch out the pumps. The stock pump is not adequate for your needs.

PS: You're going to need persist with the lines. They will come apart.

reactor2

[QUOTE=corvettesforfun;1578328705]You need to switch out the pumps. The stock pump is not adequate for your needs.

PS: You're going to need persist with the lines. They will come apart.[/]

If the lines can't be removed (which is looking to be the case) will a BAP be an acceptable compromise?

This is ridiculously frustrating, I've been working on cars since I was 16 and I have never encountered a connector this stubborn. What a horrible design.

It's not like i fiddled with it for a few mins and gave up, I've spent a quality 3 hours already. It doesn't need to be this difficult.

jobberone

[QUOTE=reactor2;1578329362]I wasn't implying you haven't struggled with it. But they will come apart. Perhaps there is a member near you who could lend a hand with the project.

I don't know of anyone who leaves the stock pump in though. Perhaps someone else who has will chime in. You cannot allow your engine to ever go lean on boost. It will mean the end of it.

leo12

[QUOTE=reactor2;1578329362]I have a 98, all you need is a 10 dollar fuel line tool like these, red one for the feed, blue one for the return, slide them in the line make sure it makes a clicking sound or they will never come off ,wiggle the line a bit they will pop right off.

zavod

My car is a 98 and I had to replace the pump with the 255L unit and run a BAP with the hotwire kit for my setup with 60lbs injectors on 9lbs of boost....

I got my pump from these guys!

http://www.onlyfuelpumps.com/walbro-...p-grj420p.html

I used the racetronix hotwirekit, they sell a complete kit with fuel pump here:

http://www.racetronix.biz/customkiti...RFPK%2D007&eq=



It took me abit to get my lines apart. You will just have to keep working the hose around in a wobbling motion until the disconnect tool releases the two sections. I used the same tools red and blue as posted above, picked them up from harbor frieght!

Took me a couple hours and alot of select words!

Blow Torch

[QUOTE=corvettesforfun;1578329611]

On top of that, you have a 13yr old pump
They WILL come apart.

reactor2

Those are some nice looking tools, I'll have to pick those up!

Thanks everyone for responding.

reactor2

I picked up a set of those anodized tools at napa. Within 10 seconds I had both the remaining lines off... They just popped right off effortlessly.

I broke the crimp clamp putting the fuel hose on however... I hope they sell this at the auto store. If not where can I get one and could in use a small screw style clamp?

Also I damaged one of the metal quick connect retainers, where can I pick one of those up?

madmatt9471

The stock pump is close to 190 lph and the LPE is 255 lph -
What you get is Fuel Pressure DROP in the higher RPM's where it needs more fuel to feed the extra air coming in.

You should be fine but if you decide to go further with Boost you would be best to upgrade to the LPE minimally -

You should also think of doing a BAP for insurance, I ran my stock pump with a BAP and 591 RWHP for quite some time.

What size injectors are you running?
What is the rest of your fuel set-up?

REMEMBER: That when you ran Nitrous you also had a fuel jet to compensate the Nitrous Jet and with the Supercharger you do not.

Thanks,Matt

madmatt9471

Sorry for the repeated questions - I just went from the top and gave my answer!

(1)Definitely do the 60 lb injectors
(2) The lines will come off, my '98 was tuff too, I even had to use a small flat driver to push one of the tabs in extra to unclip it
(3) Do a Hotwire Kit - I run this one for my second pump: http://www.casperselectronics.com/st...roducts_id=678
(4) BAP- MAGANAVOLT or Kenne Bell will work good
(5) Do your LPE pump the 255 lph is really a substantial upgrade over 190 lph

Again the stocker is 190 lph, even the C5 Z06 is 190 lph -

Thanks,matt

madmatt9471

You can get those at Grainger! or Ebay

http://www.grainger.com/Grainger/wwg...headSearch.y=8

http://cgi.ebay.com/ws/eBayISAPI.dll...#ht_500wt_1202

I do not suggest you use the hose clamp it is not strong enough or make a secure enough seal on the factory fuel tube.

Thanks,Matt

reactor2

I went to the stealership to see if they have these items (clamp and retainer)....they don't of course. I was toying with the idea of buying the pump and line so I could get these pieces. These idiots want $781 for a pump and $180 for a fuel rail fuel line. Holy crap! If I wanted to pay high-end prices I'd buy a high-end car. Porsche, Ferrari, Lamborghini, Jaguar, etc. Seriously GM?

leo12

Napa has the clamp/retainer, if you cant find them i have a couple of an old pump pay shipping C.O.D And ill send them to you