Thread: 1.9 Modified Rocker Install

Glad to hear you got all the bugs worked out man. Get it re-tuned for those 1.9's though as your final mod

Originally Posted by bluegtp91

Glad to hear you got all the bugs worked out man. Get it re-tuned for those 1.9's though as your final mod

This is a response from Will I got last year in contemplating the rocker and Tb install.

On Sat, Jan 24, 2009 at 7:31 AM, <Kissmyss> wrote:

Hi Will, will I need a retune to install a 72mm throttlebody and 1.9 modded rockers.


willoverkill@gmail.com writes:
The rockers shouldn't need retuning, install and enjoy. The throttle body depends on what you'd be installing; the Stage 1 ZZP for example would be fine as it does not modify the area where the MAF sensor is located, however the Stage 2 unit would need retuning as it modifies that area and throws off the MAF calibration. I would recommend the Stage 1, or if you want to do a real upgrade go right for the Northstar kit or a billet 78mm.

The Northstar, 78mm billet and Stage 2 72mm throttle bodies all require retuning. The Stage 1 72mm does not, however it isn't enough of an upgrade that I would recommend it. Go for the Northstar unit and don't worry about the TAC, just a standard TPS adapter is required and all changes required for the Northstar will be retuned into the PCM.