Since I did the install for the FWI, I wanted to do something with the PCM since it does not have a tray anymore, now I also have a extra PCM that is programed for my car. So basically one PCM for Performance and one for factory. Now my idea is to make a dual PCM tray, This will allow me to switch from daily driver to performance - may sound useless but I travel alot so the performance is not always need. I also want to see if I can make it look really nice, if I can find a nice plastic box - I can do a cut out use plexglass and vent it along with fans and LEDs and Pontiac symbol. What you guys think? Also if you have any ideas throw them out there!

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2004 Grand Prix GT AGGRESSOR
PRJ PCM, Custom Exhaust, 180 stat, FWI Custom Intake, DIC upgrade.

Sounds like a good idea, just a suggestion though, make some plastic covers to go over the connectors that are not in use.

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2004 Grand Prix GT [K&N Intake; 180* Thermostat; ZZP PCM; Top Swap]

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Is it work all the trouble with sometimes needing to do security relearns? On a standard 04+ PCM this takes 45 minutes.

I personally run the larger tray from wbodystore. Must have bought it a couple years back before they brought out the smaller (correct) size tray for the 04+.

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04 GTT - Retired
Best ET 13.016
Best Trap 115.56 MPH

I have a built car and PRJ tuned my car and I still get great gas mileage at highway speeds not sure why you would need to switch back in forth. I run the 1/4 in the 12's and get close to 30MPG on trips with the car loaded (3kids and all their stuff) just my thoughts

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my cars basically stock, and I'm luck to see 23 mpg on long highway trips..

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I'm in the same boat as Tyler. It is even worse if I have my Overkilled PCM in.. I kinda quit running it as of late because of this. I put on over 300 miles every week, every little bit helps.

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2006 GMC Sierra 1500 Crew Cab
Loaded with like every option possible!

2005 Grand Prix GTP GONE!

30 MPG, I dream of that.

After the turbo I am just a hair above 20 MPG

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04 GTT - Retired
Best ET 13.016
Best Trap 115.56 MPH

i dont think its gonna work very well modding and running a pcm tuned for your mods and then switching to another not tunned for it

im getting 25 on the hwy and my tune is pig rich, a GOOD tune will allow you to have the performance you want but still be able to DD it with decent gas mileage

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04 Comp-G, 3.2" MPS, MSD, TOG's, XP'd, SLP cat-back, ZZP/Self tune, SLC CAI, Lowered (alot)

This wouldn't be a useful project. If you tune, even if it is for performance, a good tune will also get you mileage on the highway. I wouldn't do it...will be more trouble than it is worth.

I made roughly 300HP, and got 33+mpg on the highway at 72mph.

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One Big Ass Mistake America

Very true. I will never buy an out of the box tune again... Not happy with it. I doubt I will put anymore money into mine now though since I have 102,000 miles on it now. May just run it for the winter and start looking for something new in Spring.

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2006 GMC Sierra 1500 Crew Cab
Loaded with like every option possible!

2005 Grand Prix GTP GONE!

x2

I will never buy a box tune.. each car is a little different (some are A LOT different) and a custom tune by a good tuner is the only way I'll go and it's what's best for the car.

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Wow, you're a badass.


Follow my journey of flight at
http://alwaysastudentpilot.blogspot.com/

Hmm it sounds like you guys haven't had any problems with traveling on the performance PCM's, it was explained that it may be harder on the car going 600-800 miles on a trip. This was why I had the idea. If you guys havent had a problem, I will make a custom single tray with some appearance and LEDs.

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2004 Grand Prix GT AGGRESSOR
PRJ PCM, Custom Exhaust, 180 stat, FWI Custom Intake, DIC upgrade.

that sucks big ones. my regal was cammed, 3.29s other fuel MPG droppers, i got like 30 highway. but city it was like 13-14 MPG the 700 RPM idle was well worth it

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2006 Honda 1000RR (Sale Pending)
GMC Sierra 1500HD (After Basic Training )