Hp500efi Upgrade Kit
 

Anyone tried the kit from Arizona Speed and Marine and what was the result?? This is the one with the Reprogramed computer, MSD box, Flame arrrestor, and preasure regulator.

I have had them installed on my boat but not fully tried them yet. I went out the other day to see what they could do and discovered that my throttles were not adjusted properly. I will let you know once I get them adjusted. So far, I can only get my throttles to three quarters.

Bad Kittie

Thanks for the reply,will be waiting for the results of your testing.

Installed kit in 2000 Formula fastech, also purchased CMI headers. Gained about 8-10 MPH,according to the weather. Put about 75 Hrs. on upgrade, no problems, very happy.

No, my motors were 502 MPI with stock mercruiser exhaust. I installed headers and Arizona upgrade at the same time, so I don"t know how much increase was the headers or the upgrade.

Do you have the phone# or web link? I am interested in the kit for my 502 Mag as well. How hard was it to measure up for the CMI's I was lookin the the diagram sheets today to measure for the exhaust?