I have a 03 4.8 silverado with a vortech supercharger and long tubes to a y-pipe. I put her on the dyno and the injectors cant keep up. I only have 24lb injectors now and was wondering how big I should go and where to get some injectors without paying $500. Also will I need a new fuel pump as mine is stock? Thanks.

 

You need to find you some 42 or 44lb marine injectors, that come up for sale alot in the classified section 200-250 is the going rate. Then for a pump you can run a walbro 255 inline...

 

get 60# injectors. and if you plan on going over 450+ yes on the fuel pump.

 

I'm sure the 42# injectors would be fine. I would go ahead and upgrade to a walbro 255 or anything bigger than stock. Nelson sells the injectors, and i believe they are a sponsor with a banner on the right side of the site. Like Mangled said, they are pretty popular in the for sale section, but i think you can find them new also for well under $500. I think the walbro is around $100 if i'm not mistaken?

 

Thanks. That is exactly what I needed.