Pettit Unlimited ECU question

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Aug 2, 2001 | 10:28 PM

skoobahead

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Pettit Unlimited ECU question

Is anyone running the Pettit Unlimited ECU with only 3 mods (intake,DP,Catback)? How does the car run on the street? Any problems running the car with only these 3 mods? I don't plan on upgrading to MP and intercooler for awhile and am curious to know how the car will run without all the mods. I plan on calling Pettit but does anyone know exactly what the difference is between their 14.7 ECU and the unlimited ECU?

Thanks,
JB

Aug 2, 2001 | 10:55 PM

Pressurized

Senior Member

Joined: Jul 2001

Posts: 596

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From: Columbus, Ohio

Sorry, don't have a Pettit, wish I did....but I got the M2 13psi ECU and I only had a catback at the time....they said it would be fine, just runs a little rich, bogged down a bit from a stop, it might fowl your plugs....but it's not dangerous, you should have gotten an ECU before those mods you're running now, just to be safe.

As for the Unlimited......from my knowledge when I was looking to buy it...."Unlimited" will accept just about any part you can screw or glue to the car....midpipe, streetport....etc.

But, yes, wou will be more than fine....maybe even better off with the Pettit than the stock ECU....

Also, you might wanna get your fuel filter replaced....

Last edited by Pressurized; Aug 2, 2001 at 10:57 PM.

Aug 3, 2001 | 10:20 AM

gsxr1000

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the "unlimited" moves the fuel cut to 17 psi....but quite frankly I really don't see the point of the unlimited ECU because the stock injectors are pretty much maxed out at 14 psi and they are outside their efficiency curve at that point anyway...at 17 psi they must be 100%...very dangerous if you ask me

as far as I know, the Pettit ECU is only programmed to work with the stock fuel system

if you are running the stock fuel system at 12-13 psi, get the Pettit, it works great...if you want to go with bigger secondaries and/or higher boost, get a PFC, or better yet, Haltech

Aug 3, 2001 | 05:12 PM

skoobahead

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For those that are interested,

I spoke with Todd at Pettit and the only difference is that the boost cut at 14.7 has been eliminated. Fuel and ignition maps are the same. I agree with GSXR1000, running anything greater than 14 psi and you need more fuel.

JB

Aug 4, 2001 | 10:38 PM

technonovice

Jinx

Joined: Mar 2001

Posts: 1,260

Likes: 1

From: Raleigh, NC

$700 for the Pettit and $1600 for the pfc from RX-7 fashion ans $999 for Farrell's pmc

Nov 17, 2001 | 12:56 PM

JoeD

Banned. I got OWNED!!!

Joined: Feb 2001

Posts: 2,158

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From: Bay Area, CA

Last edited by JoeD; Nov 17, 2001 at 12:59 PM.

Nov 17, 2001 | 06:40 PM

badass7

Pimpin Rotors...and Hoes

Joined: Feb 2001

Posts: 1,401

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From: New Orleans, LA

One of my members is selling his M2 14.7 ECU for $550 shipped to your door. Email me at talvendi@cs.com if interested.

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Nov 19, 2001 | 10:03 PM

m0t03

Senior Member

Joined: Oct 2001

Posts: 443

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From: Minnesota, now in FL and I dont think I'm goin back

Would the Pettit unlimited ECU be enough if I'm putting on a down pipe, midpipe, full catback, intake, and boost controller?

Nov 20, 2001 | 12:45 AM

Mahjik

Mr. Links

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Joined: Aug 2001

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From: Kansas City, MO

Quote:

Originally posted by m0t03
Would the Pettit unlimited ECU be enough if I'm putting on a down pipe, midpipe, full catback, intake, and boost controller?

Yep, you'll be fine.

Make sure you have a Boost Gauge installed, as a Boost Controller will not keep you from having Boost Creep that may come along with a midpipe.

Nov 20, 2001 | 02:06 AM

#10

jackc

Full Member

Joined: Jun 2001

Posts: 107

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From: canada

Yes... make sure you have a boost gauge hooked up. When I got my Pettit ecu after the install it was boosting to 17 - 18 pds at WOT.
A Mustang came up beside me while I was testing my new ECU.
I had to hold back and did not get into the second turbo hard. Didn't want to blow up. So I had to let him win. One of the only times I lost to a mustang.

I talked to Jeff and
Cam at Pettit and they got me to install a larger pill in the wastegate line to limit boost a little. I think I run a 67 jet in the
wastegate line now. I run usually 14 - 15 pds. Always with NOS octane boost on a 1/2 tank of 92 octane. But the injectors are at the limit.

If you don't have a boost gauge... you're taking a big chance...
Best wishes Always run with 92 or better gas...!!!