im swap out the old TBI system for a 94 LT1 and have to change the fuel pump. and have read that there are some mods to the pump to make it flow more or something also anybody that has changed out the pump any tips would be nice.
TIA,
RS

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<A HREF="http://ca.geocities.com/zander0710/" TARGET=_blank>
1992 Camaro RS</A>
94' Z28 Drivetrain(LT1,4L60E,PCM,3.42 posi w/ disk), Walbro 255P fuel pump
!a/c,!cat,hooker headers 1 5/8", hooker Cat back,
Custom Tune(Rev.b based)

Best Time: (old times)
15.279@89.02MPH
Underdog Racing

[This message has been edited by UnderDogRS (edited June 08, 2001).]

 

I notice you have the hooker cat-back, as do I. That will come in handy when you have to drop your exhaust. I undid the exhaust up above the axle where those two pieces go together. Then I undid the lines running to and from the tank. I also had to remove my panhard rod and undo the drivers' side panhard rod brace (3bolts I beileve). So with the muffler and PHR out of the way I then jacked the car up on the rear subframe and undid the lower shock mount bolts. This let me jack the car a little higher with the rear end staying on the ground. I removed the heat shield after the muffler. Then I unbolted the staps that hold the tank in way up in front of the tank. I was carefull not to kink the straps as I removed them from the car completely. Then I started fighting with the tank itself. Try to run it as dry as you can I had some fuel in mine but never could get a hose down in there far enough to siphon any out. Even with everything removed I still had to bend the filler neck somewhat. That took me about 5 hours with plenty of breaks. Changing the pump took about 5 minutes. Everything is pretty much reversed to get it back together. I used a long extension on an impact for the bolts that hold the straps in front, I had to put alot of pressure to get them in the holes then I just tapped on the impact to get them started. GOOD LUCK!

 

The base Walbro is the 307, pumps plenty of fuel for your combo, but if you want more, the Walbro 340 has more flow capability and is basically a 307 with some additional shims in it to make the spring pressure higher in the pump. You can shim the 307 if you know how to take the pump apart, but I'd just buy a 340 model.
You can get both of them at Conley's Performance Plus for about $125-$150.
http://www.conleyracing.com/cppmainframe.htm


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Rob
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