L31 injection system upgrade?

[L31MaxExpress]

I have a 383, aluminum heads and a cam in my 97 Express. So I understand the fueling side. Mine would hold 12.6:1 to 5,200 rpm then drift slowly leaner as the RPM increased. I was at 13.2 by 5,500. I adjusted the transmission to shift at 5,200 and set the rev limiter to 5,500.

 

[chris2323]

How long have you been running at 75psi?

 

[L31MaxExpress]

How long have you been running at 75psi?

I ran 75 psi for several years on the old 350 and then used the same spider for 2 months while waiting on the larger spider. I have a marine intake I have run too. I need to port it to match the 210cc runners in the heads.

 

[chris2323]

Ok thanks. Im going to try it out. Did you get the larger spider from aus injection?

 

[L31MaxExpress]

Ok thanks. Im going to try it out. Did you get the larger spider from aus injection?

Yes in a round about way. I bought it off someone who had bought one for a whipple supercharger build and had yet to use it because he ended up finding a marine intake instead. I picked it up local for half what a new one is going for. As I said above took me a couple months to find one.