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Piggyback computer/j3 chip/ECU remap 


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 Post subject: Piggyback computer/j3 chip/ECU remap
Posted: Tue Nov 01, 2011 9:41 am 
Parts Gopher

Age: 28

Posts: 96

Joined: 13th Jan 2011

Ride: EL XR6

Power: 173 rwkw

Location: melbourne
VIC, Australia

Hello, I have a 98 el xr6 manual.. Haven't had the car all that long and the previous owner has had some work done to it. When i picked it up from the mechanics after getting the roadworthy he said this car defiantly has some grunt and would need a piggyback computer to be able to run to its full potential..

Here are the mods that have been done to the car that we know of:

- Cam is 1 up from standard
- Fitted with forged flat top pistons
- Block has been rebored
- Crank has been rebalanced
- Block has been decked
- Valves are larger
- extractors & full 3'' exhaust

I have been looking at getting a piggyback computer or getting the ECU remapped but am not sure in which way to go. I have heard about the j3 chips but im not to keen on them as i see them as a cheaper way out..

Can someone please help me?

Thanks! Luke



P1050806.JPG [ 381.71 KiB | Viewed 217 times ]



EL XR6- 18'' BA XR8 wheels-King Springs-Pacemaker Extractors With a full 3'' exhaust threw..-High Compression pistons-Lumpy cam-Big valves-"head work"-3.45LSD-FPV short throw shifter-Fusion 1000w sub&fusion 350w amp
Next mod, Piggy backed computer and dyno tune! BA intake pipe

 Post subject: Re: Piggyback computer/j3 chip/ECU remap
Posted: Tue Nov 01, 2011 9:48 am 

Posts: 14519

Joined: 7th Nov 2004

Ride: AU XR8

Location: a shit suburb in sydney
NSW, Australia

you only really have 2 options which all depend on how much money you want to spend.

the cheap and still effective way is a j3 chip with a custom dyno tune.
the other option is an aftermarket ecu, this can be piggybacked onto your ecu.
again it will need a custom dyno tune but its the more costly way..

im more than happy with my ems ecu thats running piggyback on my car, i chose the aftermarket ecu because imo was best for my aplication..
in your case you will get the required results from a j3 chip at 1/4 of the cost..
 Post subject: Re: Piggyback computer/j3 chip/ECU remap
Posted: Tue Nov 01, 2011 11:38 am 
Getting Side Ways

Posts: 884

Joined: 1st Apr 2005

Gallery: 4 images

Ride: EF XR6 Wagon, AU2 XR6 VCT

Power: 148 rwkw

Location: Auckland
New Zealand

Awesome looking XR6. Always had a soft spot for the EF/EL XRs - IMO they are some of the better looking Falcons.

Agree with Troyman: for a naturally aspirated engine with your mods, you would gain very little by spending the extra money over a J3 chip. The J3 has more than enough data points in the tables to be able to fine tune the performance to the max. It's all in the tuning. Some members of this forum have seen excellent gains, even self-tuned (also check out the owners gallery at And there are a number of places around that can dyno-tune the J3, if you want to get most of the benefit quickly.



95 EF XR6 wagon, 17" FTRs, DBA rotors, KYB/Koni, AU bottom end, ported EF head, backcut valves, SS Inductions, Territory intake, 10.2 CR, Auckland 1258 cam, vernier gear, PH4480 headers, no cat, Tickford 2.5", 2800rpm stall, J3 chip

 Post subject: Re: Piggyback computer/j3 chip/ECU remap
Posted: Tue Nov 01, 2011 11:43 am 
Getting Side Ways
User avatar

Age: 29

Posts: 4599

Joined: 30th Aug 2010

Ride: BF XR6,

NSW, Australia

theres nothing wrong with the j3 even for some turbo applications, altho an aftermarket computer can do the job better it just depends how much power you want, the j3 does have its limits with the use of turbo or supercharger, naturally aspirated will be fine with the chip



xr8 snorkel,typhoon lower snorkel,territory intake pipe,20% underdrive kit,pacemaker extractors,high flow cat,xforce exhaust,t56 conversion hd turbo clutch/ flywheel,m86 3.45 lsd,custom tune187.1rwkw as an auto

 Post subject: Re: Piggyback computer/j3 chip/ECU remap
Posted: Tue Nov 01, 2011 11:56 am 
Getting Side Ways

Age: 33

Posts: 2563

Joined: 19th Feb 2007

Gallery: 21 images

Ride: 98 EL Futura

Power: 199 rwkw

Location: Lilydale
VIC, Australia

Im using a J3 chip an making a fair bit of power, you just need someone that knows how to tune them properly



EL Futura: CVE head, Wolf V500, ICE Ignition and Coil, 36lb injectors, Walbro 255lb, Paci comps, 3" exhaust, T5, Harrop Truetrac with 3.9s. Now with 198.9rwkw, (~185rwkw and 13.80 @99.1mph) with more power to come

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