Guys If i'm just running p29 pistons on a d16z6 block with I/H/E Do i really need a tune? Compression is ahmmm i think at about 12:1 from my researches, Some do get a tune and some don't, but i would really like to hear from 1st hand experience.

 

Cmon guys their has to be someone that know, where the gurus at......

 

Do you have upgraded fuel pump, injectors, intake manifold, better flowing header, chipped ECU etc? If not.... N O

 

As stated above, pistons of course headers/ cold air/ exhaust, no pump, no injectors,still bumps up the compression ratio to 12:1. So stock ecu is fine, is what your saying? Anyone else want to comment. Thanks NVturbo

 

You have changed from 9.2:1 up to over 12:1... OF COURSE YOU NEED A TUNE !!! Your ECU has no idea that you have changed your pistons... or your header, intake or exhaust system.

 

Fair enough, can I get away with a chipped ecu? In other words have someone burn me a map that will work?

 

NOPE...

 

If you mean customizing the fuel and ignition instructions on a DYNO to make sure that these values are appropriate for your engine combination... then yes. If you mean telling some remote chip burner/tuner what parts you have and they send you a one-shot "custom" tune... then NO. That is called a "basemap", not a custom tune.

Essentially, your engine needs to be on a dyno.