Holley HP EFI in a miata

[nine lives johnny]

over the last few weeks i installed the system in ls1 miata. got the harness and ecu from holley. we did a wright up on it on the teams web sight.

During the 2011 season, I had raced my LS1-swapped Miata with a stock ECU from a Camaro and an aftermarket wiring harness. Although competitive, this setup proved challenging. My little car was plagued with driveability issues that, at times, kept it off the street. The main issue was that my tune was locked. Any time I needed to get small issues fixed, I paid to unlock my tune and ate up an hour drive out to the shop. On hot track days, I was unable to change the tune, which made me worry about my motor taking the heat. But that worry has now vanished faster then the rear tires on a 16-year-old's Mustang.

I received Holley's HP EFI system with a new LS1 harness. While intimidating at first (as all wiring jobs are), the install was incredibly simple. Holley's claim to fame is that the EFI system "self tunes". They say the ECU is preset with settings that allow it to learn your motor for the best horsepower and gas mileage. I decided to test their claims on the LS1 Miata.

[nine lives johnny]

the biggest issue being that the battery was in the trunk and my supplied leads where a bit short. i tried to copy and paste the whole article came out looking like crap. the line for it is here www.johnnycichowski.com

[SShep71]

Looks pretty good, im going to be running tge larger system on my pontiac. I wish I could see that feul milage but I know better.

[nine lives johnny]

if you got a t56 and good compression you can get close.

[SShep71]

I was going to run a 4l80E thats paddle shifted. As far as compression I can go either way because im going to run a roots style blower.

[nine lives johnny]

i had a roots style blower on my last car. general mpg went up when i kept my foot out of it. the problem we me keeping my foot out of it lol.

[SShep71]

Ha, yeah im pretty much counting on the foot control for mpg. If I can pull of 18mpg cruising ill be stoked. I figure with the fuel injection tuneability, overdrive trans, and 3.23 rear I should get close

[nine lives johnny]

as long as your putting this set up in a milk truck, you should get 25 highway with that setup.