I am wondering if any of you can tell me if my 87 TPI 350 will run right if I replace my junk stock fuel pump with a Walbro 255lph? Reason being, I am going to be turboing the car this winter so I want to put a higher output fuel pump in it.

 

Yes it is a drop in replacement

 

Dose any body remeber where the cut-out template for the "trap door" is?

Im doing the same thing OP is. (Sep with a good stock pump and Procharger)

 

If you have a jack and two jack stands I would not do the trap door. If you are set on doing it, very well. But remember that after you cut the hole you have to cut all 4 steel lines to be able to get the pickup unit out of the tank. I don't think most people think of that when they start cutting holes.

For the time it would take to cut the hole, cut the lines, then patch them up, the tank can be dropped. If you do the cut method use high pressure EFI hose and proper EFI clamps or you will have fuel spraying everywhere

 

Aw dam1t it, I did forget about that.

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I just replaced my pump original assembly line pump with a Walbro last month, dropping the tank isn't that bad. Besides the trap door is fine if your going through pumps like oil filters but how often do any of us replace these pumps.

 

So it is a drop in replacement, now will the stock fuel pressure regulator compensate for the higher output pump? Or would it be wise to put an aftermarket fuel pressure regulator on the car with the new fuel pump?

 

The stock regulator will work fine. Unless your running a thirsty highly modified motor there really isn't any reason to change it.

 

Thanks!

 

For the love of god please dont cut a hole in the trunk for the pump, that is the most ghetto way to change a pump. Jack up car, remove muffler , let rear hang down , change pump. Ive done it several times its easy....Take care

 

See post #5-

 

Take no offense. Imho if your going to cut a hole there you might as well just fuel cell the car. Its like cutting a hole in the hood to take the motor out, lol. Try racetronix for the kits they are good price and are Walbros which you want. Don buy chinese fleabay pumps. Although easy to change I wouldn want to do it twice in a small timeframe. Take care.

 

I just did the trap door mod, and I think all u guys talking people out of it must be some kind of camaro snobs. Most of us probly paid around a thousand buck for our cars so who the hell cares if theres an access door under the carpet.

I do think all 3rd gen owners should drop a tank at least once so they know what a bitch it is to get back in. I myself have done it three times, twice for fuel pump, once for a gas tank from firebird because mine got busted holes from the re-install. And I was looking at anothertime because the pump was giving low fp. My car wasnt in and ideal position to drop tank because my driveway is sloped and the front of the car is downwards. Go figure. have my life depending on tire chalks or cut an access in.

I might be more comfy with the metal work because I am a sheetmetal worker, in the trade for 12 years. Alls u need is a drill, unibit, ruler, doublecuts or offset snips, cut the panel out. Cut the fuel lines after the last bend with a bolt cutter then clean it up with a mini pipe cutter. Change ur pump, reconnect with a couple inches of rubber fuel line and double up on the clamps. Make a patch door with a hinge/lock foam gasket around it.

Start your car and drive off while flipping the bird to the guys laying under they're cars all weekend having to re-weld they're exhaust.

 

I just did the trap door mod, and I think all u guys talking people out of it must be some kind of camaro snobs. Most of us probly paid around a thousand buck for our cars so who the hell cares if theres an access door under the carpet.

I do think all 3rd gen owners should drop a tank at least once so they know what a bitch it is to get back in. I myself have done it three times, twice for fuel pump, once for a gas tank from firebird because mine got busted holes from the re-install. And I was looking at anothertime because the pump was giving low fp. My car wasnt in and ideal position to drop tank because my driveway is sloped and the front of the car is downwards. Go figure. have my life depending on tire chalks or cut an access in.

I might be more comfy with the metal work because I am a sheetmetal worker, in the trade for 12 years. Alls u need is a drill, unibit, ruler, doublecuts or offset snips, cut the panel out. Cut the fuel lines after the last bend with a bolt cutter then clean it up with a mini pipe cutter. Change ur pump, reconnect with a couple inches of rubber fuel line and double up on the clamps. Make a patch door with a hinge/lock foam gasket around it.

Start your car and drive off while flipping the bird to the guys laying under they're cars all weekend having to re-weld they're exhaust.

 

I bought my car when it was barely 2yrs old, sure wouldn't cut a hole like that in mine.

I would put in a Walbro 340 if your going to be going with a turbo later, maybe even a dual pump setup.

Not sure why people are replacing pumps so often. (well I do, airtex is junk)
I have only put 1 pump in my car and that was because I wanted the upgrade, in the early 90s and 150,000 miles ago.
If you put anti-seize on all your bolts, set your exhaust up for quick removal, its all a breeze and can be done in 3hrs.
Its also good to take it all apart to clean and inspect the car now and then.

 

Couple of observations here. No matter how you explain it, bottom line is its ghetto and pure lazyness to cut a hole to take the pump out. I bought my car 5 years after new and I only changed the pump once and that was because I put a blower on the car. You buy cheap flea bay pumps you get what you pay for. To each his own. Btw we are not camaro snobs, whatever that means.We just do things the correct way. Flipping the bird to guys laying under there cars changing pumps?? How old are you?? Anywaysss. Take care..

 

Well irocz1989, im 30 years old. And seeing that u are 36 and got ur car 5years new and what probly 16 or 17 tells me that u came from money. Well mr silver spoon, some of us dont have the money to put blowers and expensive fuel pump. Some of us have kids and nagging wives that wont let us work on our cars all day. Does this make me ghetto because i cant afford to do things the right way? Anything we do to our cars is custom, so are u gonna knock the guy with big rims or a stereo because its not factory? Its all the same. Ive lived in the ghetto, and people take offense to that label. Having an iroc is ghetto for that matter because its not a "real" muscle car. Whats the most u can ever get for your car, 8-9 grand even with your mods. Dont kid yourself u dont love ypur car more than i love mine just because i cut a hole in it. As u said to each they're own.

Bottom line is, if we were both driving in the middle of nowhere and both our fuel pumps went out. Who would be back on the road after a trip to autozone and who would be taking it up the A for a tow truck and a shop to do things the "right" way? I guess that would be mr silver spoon and no I wont flip u off as i drive away, just laugh. Sorry my way is practical.

 

Lol, I come from money Lol....Its called a job, try it sometime they work wonders. Sorry you have a nagging wife, I had one, divorced her before I could have kids with her. Sorry you think irocs are ghetto, maybe yours is, but speak for yourself. And the only one taking it up the *** would be you, I can afford AAA gold card, tows are free, and pump still works cant say the same for fleabay pumps some buy that need to replaced so often you have to cut a fleabay fuel pump removel hatch in your car. Good god, your 30? There is no hope for the human race....Now we all know why your wife is a nag, dont blame her one bit.. Have a good one

 

Thanks, I will have a good one..... Sorry about your *****

 

Guys, the name calling and stuff doesn't help anyone on here.


Annnnd you would be back at auto zone getting another new pump within a few thousand miles, IF you're lucky.

It's not real practical if you have to spend that much time going to get and changing cheap/junk pumps. (how much time is all that worth to you?)

This is truly one of those times it is worth it to spend a extra buck or so, buy a quality product and do the job correctly. This way, you only have to do a job 1 time in 20yrs, not once a year.


Just a FYI;
I made up an carry a inline EFI pump/relay/wiring that I can put in place of the flex feed hose on the dr side frame rail or where the fuel filter is if the factory pump dies..
Its fast, easy and will get ya home from miles and miles out with out having to wait for a tow truck or a ride to a parts store.

 

Sorry about that. I agree on buying a quality pump. You can get a high performance unit for under 100 from racetronix and its a walbro. The point I was trying to get across was there is a right way and a wrong way to do things. Cutting a hole in the floor pan of your car is the wrong way. Here are some reasons why: Taking out the whole assembly lets you inspeck the tank for leaks, rust and the condition of the feed lines more closely. As well as inspecting the filler neck brazing as well. Just dumfounded why someone would cut a hole in the floor to remove something that almost never needs to be replaced IF...you buy a quality walbro to either replace of upgrade what you have. My example, I put a GSS340M, which is not even produced anymore under that # in maybe 1998. It still works. The 94 gt I have we put a 190lph walbro in it in 99, still operates flawlessly.If your pumps are dying maybe you have alot of debri in the tank clogging up the sock. Just do it correctly is all. No need to attack me .

 

Sorry about that. I agree on buying a quality pump. You can get a high performance unit for under 100 from racetronix and its a walbro. The point I was trying to get across was there is a right way and a wrong way to do things. Cutting a hole in the floor pan of your car is the wrong way. Here are some reasons why: Taking out the whole assembly lets you inspeck the tank for leaks, rust and the condition of the feed lines more closely. As well as inspecting the filler neck brazing as well. Just dumfounded why someone would cut a hole in the floor to remove something that almost never needs to be replaced IF...you buy a quality walbro to either replace of upgrade what you have. My example, I put a GSS340M, which is not even produced anymore under that # in maybe 1998. It still works. The 94 gt I have we put a 190lph walbro in it in 99, still operates flawlessly.If your pumps are dying maybe you have alot of debri in the tank clogging up the sock. Just do it correctly is all. No need to attack me .

 

I apologize for the camaro snob comment. There is no question that doing things the right way the first time is always the best way to go. Everyone knows that. I just think its unfair to say any other way is lazy and ghetto. Sometimes we dont have the ideal conditions like proper tools or flat ground to do a tank drop. My driveway is at a 45°angle and I cant move it. Best option is, cut a hole in it IMO. Sometimes u gotta do what u gotta do to get the job done. It may not be pretty but it works. Every construction worker knows that. This seems to be a timeless debate. And in fact the original poster asked how to cut the hole not whether or npt its a good idea.