About20ninj45

Hey guys, so I wanted to know if a zl1 map and ls7 map will work on the p59 pcm. Looking at not going as or doing a mixed maf and sd. Eventually will be over 25 psi so that's the reason for the 3 bar. Input and suggestions?

FFDP

iTrader: (2)

The ZR1 map works, just need to change the MAP plug/wiring to work on the LS1 style harness.

I'm sure you could make the MAF work if scaled it right and adjusted the IAT tables too. Though a P59 is better off going straight speed density if you want to run a lot of boost. A MAF sensor would have to installed in like a 5in intake to not max out.

You could also purchase a EFI source 3 bar MAP that is plug and play with a GEN 3 harness.

About20ninj45

Thanks for the reply. What about my OS. Will I need to current that? Heard a rumor not being able to enter negative values

smokeshow

iTrader: (16)

Yeah, you can't enter negative values that the ZR1 MAP needs. Best case it would skew your MAP readings about 10kpa high.

FFDP

iTrader: (2)

HPT should allow negative offsets now, I believe sometime in 2014 they fixed this on custom operating systems.

Perhaps some computer may not but you could contact support to see if it's something wrong with that particular operating system.

smokeshow

iTrader: (16)

Interesting, just checked two separate P59 files I have and yeah you can use negative offsets now. Chris has been neck deep in the code for like a decade now though, so its about time lol.