I am trying to get motivated to get my 89 IROC up and running again. The car has been sitting for like 14 years and has super old gas in it. The car is my high school car so it has sentimental value, but life happened and I neglected it. The car has vortech heads, 1.6 roller rockers, ZZ9 cam, vortech intake, SLP runners and headers and a ported plenum. Before I start the car up to see what the state of the engine is (turns by hand) I intend to replace the fuel pump (possibly the fuel tank as well), replace the fuel injectors and will most likely go with 22 lb Southbay injectors. During that process, I will flush the fuel lines and hopefully reuse them.

The question I have, is which size fuel pump would be best to have a proper fuel flow with my current setup and the 22 lb injectors? Would a stock replacement provide the proper flow? I understand that my setup is very mild. I am just looking for a reliable street/cruise car, nothing really beyond that.

That being said, if this engine is done, I will probably 6.0L LS it and would like to not have to replace the fuel pump more than once so if I can put something in that would satisfy both motors, I would be open to that.

I apologize for the ignorance, but I have been spending my time away from F bodies with Turbo Buicks and could not find a similar post on a search.

Thanks in advance for the info.

 

Walbro 255, assuming your 6.0 plans are under 500hp. If they aren't then a walbro 450 or Aeromotive 340. The old gas in the tank is more of a problem honestly. It may be cheaper in the end to go with an Aeromotive replacement tank system. As long as you are running a return line, any excess fuel will go right back to the tank.

 

I intend to remove the old gas (still trying to figure out what to do with it). I also plan to flush the lines as best I can of old gas.

I would imagine that the sending unit needs to be changed also correct?

How about a 'hot wire'? Is that worth it on these cars? Big in the Turbo Buick scene.

 

Yes to hot wire. I completely forgot. The stock power feed to these cars was suboptimal at best.

 

I bought both the walbro and the Aeromotive. Decided to use the Aeromotive, with hot wire. So easy to install the hotwire and gives you bigger cleaner power/ground. Definitely go that way. Don't forget a nice new fuel filter too! When you have the tank undone from the lines, that gas will be gone (tank). Then undo the fuel filter and those lines will be drained. When you are up front doing the injectors, undo the rubber lines that run to your rails and all the gas will be out for the lines under the car. You will get what's left in the rails when you do the injectors. The old gas...put it on free curb alert on craigslist, lol.

 

https://www.racetronix.biz/k/fl98-fu...p255e/rfpk-005

 

Aem 340 lph pump less than 100 bucks (50-1000), will drop right in and utilize stock style sock. Aem 50-1200 more compatible with e-85, about 20 bucks more. Decent pumps for what they are. The import crowd uses either of these pumps for 500 plus horsepower stuff on a regular basis with nothing but excellent reviews. Half the time when walbros are out of stock everyone will have the aem.

Holley just purchased aem, so once the stock is gone I'm sure they'll kill half the product lineup, or raise prices 50-100% so get them while you can.