Ok, I'm going crazy here trying to find the perfect setup. I have went threw three different tanks trying to get the best performance. I currently am using the GM32AFI fron Spectra Premium. It has the internal pump and bowl. Well, it looks great and works perfect with a full tank or sitting still. I have stalled the car three times with little over 1/2 tank driving around town. Did it once at a slight incline, and twice getting on it around a corner. I think for the 450+ dollar price tag it's a poor design.
I would like to see what other members are using for their fuel injection setup. I have a TPI setup in which everything is working perfect except the delivery problem.
So any type of info or pictures would be appreciated

I have a stainless rock valley tank with in tank pump. The pump is a Walbro GSS340 (255 lph). Out of the pump is a couple of feet of -6an to hard 3/8 to four feet or so of -6an to the fuel rails through the regulator to four feet or so of -6an to hard 3/8 to a couple more feet of -6an and to the return side of the tank. I have never, ever, ever had any fuel delivery issues...except once when I ran out of gas and I guess once when my old pump got too small for my power level.

My motor is a 383, stealthram MPFI, makes I dunno 400HP, runs 11.80's and occasionally pulls at least one of the wheels on a good launch.


P.S. Fuel level has never had any impact...last night my gauge read less than a 1/4 tank and had no problem pulling to 7k in first gear.

Mine has the in tank pump. Right from the pump I run 2 foot of -6 fuel line to a reusable filter. From the filter it has -6 fuel line all the way to the motor and runs through the factory pressure regulator. It returns back to the tank through -6 fuel line.

built my own for $96 tank from rock auto
http://memimage.cardomain.com/ride_images/2/3740/4061/21849530345_large.jpg

Balljoint, Very nice car. What is that sending unit out of? I like the idea for the sump :yes: Have you had a chance to try this setup out?

Why not add a surge tank in front of the tank you are using. I've been using a surge tank for 3 or 4 years & its eliminated any stumbling. Before I couldn't go much below 1/2 tank.

guess i'm cheap. i used my stock 67 tank and ran a new line to my engine and used the old fuel line as a return line located in the filler neck. no problems here and i've ran it almost out several times. i use a rubber mounted external fuel pump mounted under neath the trunk in front of the tank. i have not auto crossed this car or drag raced it either. hottrodding with no problems

Airtime, I have tried that setup also and had problems. I guess it is the pressure thats required for the TPI?

Would like to see some pictures of that surge tank setup.

I use a stock tank and sender, with a new retunr run into the stock sender.
Never a problem, ever, and it's got plenty of hard miles and track time.

my care has a tuneport on it. i ran a 3/8 fuel line and used the old 5/16 factory line for the return. factory sending unit for the fuel guage also.


jimm, did you make any type of vent for your tank. i did not. i also ran my return line into the filler neck. where did you run yours?

firstgenguy, i read all about how the stock tank won't work and the reason's why, but i have never had a problem in 9 years with my set up. if your having these issues with so many different tanks maybe your problem is something else. just my 2 cents

Airtime, could be possible the pump relay shuts down. I had my stock setup like yours running 3/8 ( -6 hose ) and using the factory line for the return. Return ran back into the sending unit. What pump are you using and where do you have it mounted? I was using the Walbro 255, maybe I had it mounted to high. I had it mounted right next to the top of the sending unit. If you have any pics that might help.

http://i181.photobucket.com/albums/x316/firstgenguy/GeorgesSig.jpg

I'm running a lsx motor w/ a stock, non baffled tank and inline pump on my chevelle. I've run the tank low many times and never had a problem. When the camaro gets an injected engine I was thinking of going with a baffled tank w/ in tank pump to make for a bit cleaner install and hopefully a little less noise from the pump

i should get my car back from the brake shop today. i'll try to get some pics but it might be next week since i'm waiting on a brake part.

i don't remember what pump i used. it is mounted in rubber (old mudd flap) and i believe i used 1 1/2 pipe clamps that u get from lowes. the galvanized type. nothinjg fancy. i bolted it to the front bottom side of my trunk. i have a filter before the pump. remember these little pumps are made for pushing not pulling so get the linegoing to the pump as short as possible.
you should not be having that much trouble with a tank. mine is mounted pretty low. i'll see about those pics for u.

I used this design (modified slightly) that I found on the internet for a surge tank. It's not as elagant (or as expensive) as an in tank baffle and pump, but its been working for two years. All due credit to Ray!

http://www.geocities.com/hrayhouston/antisurgetank.html

sorry i haven't post those pics but the car is still in the shop waiting for some 2lb rear brake valves

Have you had a gauge to check pressure? And does the motor stumble or just die? I have the same tank and first start up it did the same thing . But i have no other issues. Keep me posted. Wes

Wes, I havn't checked fuel pressure yet. I did fill the tank back up and it runs fine.

YEAH... I did the same thing and it fixed it. I work for a jobber store so i am the problem...keep in touch. i'll make some calls. It looked like a real good tank and the baffel looked good. But i am having the same problem. What year is your car? Does it leave pretty hard and squat down in the rear when it leaves?

I just got off the SPI... it seems that if your tank has a sending unit with reg clamps on the sending unit ..you have to remove the clamps and put gear style clamps. Does that make sense.? Wes

Wes,
I'm not shure what you mean by the clamps. Are you talking about where the pumps attaches to the sending unit? Did they say how that cures the problem? My car is a '68 and dosen't launch hard enough to cause the problem.
George

http://i181.photobucket.com/albums/x316/firstgenguy/george188-1.jpg

http://i181.photobucket.com/albums/x316/firstgenguy/6.jpg