Well I got these many moons ago for my 392 lt1 and was told they were 36lbs which would have been great for the set up in the car. I figured since I am going medium turbo on the 383 that they would work good on it and going huge on the 392 so no longer will work there. So I decided to check up on what they are and found that the ford people think they are 38lbs the buick guys think they are 40lbs and some flow chart I found had them listed at 42lbs but didnt list a fuel pressure it was rated at. So in order to get a correct tune need to know what they are .I listed this under the fuel injection site but figured the turbo and blower guys would know best with having to run big stuff and might be able to find someone here who knows for sure as I cant find squat on the web that I believe 100%. Now I know why when I dynoed my lt1 for the first time I had to get nuts with the fuel pressure to make it right. tune was for 36s and they are larger. anyway need to get a definite answer on this not a maybe so I dont tune for the wrong thing and throw it all of when I find out it is something else.

 

no one has seen these or uses them? I have done searches and had too many different answers so not asking someone to search for me (not a dummy ) but if someone knows of them. thanks

 

the lucas part number you have #621030 are 42 pounders. found here. http://users.erols.com/srweiss/tableifc.htm

 

same thing I had found but to listed with a rated fuel pressure which could send them down to 40s like the gn guys called them. I guess that I will start with 42 and tune from there. thanks for looking on it.