rechipping the ecu - Land Rovers Only

capnkerr · 01-07-2005, 06:16 AM

Hello,
I have exchanged the 3.9 for a 4.6 in my 90 classic. I want to rechip the ecu. I've been told to use the 4.2 chip. Is there a 4.6 chip or is the 4.2 chip appropriate for this exchange?
Thanks
Shawn

Disco Mike · 01-07-2005, 07:24 AM

Shawn,
I would suggest you contact some of the companies that do the rechipping and see what they suggest.
Mike

hamrendan · 01-07-2005, 07:40 AM

I have been around Rovers for a long time, but the only people who are re mapping the fuel software are guys like RPI engineering. They are also only doing it in conjunction with things like hotter cams, and increased air flow ( porting polishing, cold air induction though an oil air filter, and free flow exhaust). Even with all this stuff the HP output is minimal compared to a turbo or supercharged engine chip. These engines are built for low end grunt, you can probably get the best bang for buck improvement with a new air filter, good plugs, wires, clean injectors, and a free flow exhaust than you could with a simple ECU swap.. And to be perfectly honest, I dont think that would work anyway.. Lucas stuff is fickle enough, if you plug in a new map chip it may screw up more than you bargained for... Ohh and remember.. "someone said" does not carry any gurantee or warantee.. Including my 2 cents!

Kevin88RRC · 01-07-2005, 08:34 AM

East Coast Rovers (http://www.eastcoastrover.com/RoverV8.html) does chipping. You could also check with Rovers North (http://www.roversnorth.com) and JE Robison (http://www.robisonservice.com) for more info. I think your ECU needs to be a 14CUX to do the chip thing.

hamrendan · 01-07-2005, 01:49 PM

I didn't understand that you had exchanged engines... my bad..

capnkerr · 01-08-2005, 07:16 AM

I'll let you guys know the results after I install the 4.2 chip. Thanks for the responces.

Shawn

TerryS · 01-08-2005, 08:43 AM

I am assuming ( dangerous) that you used a 4.6 bottom end and put your 3.9 frontcover on, with pump & distributor. What cam did you use, as the 4.6 cam won't drive a distributor gear. I am not sure why you want to use a stock 4.2 chip, as opposed to one writen for 4.6. Are you doing this just because you are still using the 14CUX Lucas box?

01-07-2005, 06:16 AM	#1 (permalink)
capnkerr Member Join Date: Sep 2004 Posts: 5 Gallery: 0	rechipping the ecu Hello, I have exchanged the 3.9 for a 4.6 in my 90 classic. I want to rechip the ecu. I've been told to use the 4.2 chip. Is there a 4.6 chip or is the 4.2 chip appropriate for this exchange? Thanks Shawn

01-07-2005, 07:40 AM	#3 (permalink)
hamrendan Senior Member Join Date: Sep 2004 Location: Cottonwood CA near Redding Posts: 206 Gallery: 0	Chip?? I have been around Rovers for a long time, but the only people who are re mapping the fuel software are guys like RPI engineering. They are also only doing it in conjunction with things like hotter cams, and increased air flow ( porting polishing, cold air induction though an oil air filter, and free flow exhaust). Even with all this stuff the HP output is minimal compared to a turbo or supercharged engine chip. These engines are built for low end grunt, you can probably get the best bang for buck improvement with a new air filter, good plugs, wires, clean injectors, and a free flow exhaust than you could with a simple ECU swap.. And to be perfectly honest, I dont think that would work anyway.. Lucas stuff is fickle enough, if you plug in a new map chip it may screw up more than you bargained for... Ohh and remember.. "someone said" does not carry any gurantee or warantee.. Including my 2 cents! __________________ Any advice given in this forum is my 2 cents, which is roughly the value of said advice! Dan Hamren 93 LWB "Dubya" AKA "The Beast"

01-07-2005, 08:34 AM	#4 (permalink)
Kevin88RRC Senior Member Join Date: Sep 2004 Location: Portland, Maine Posts: 713 Gallery: 0	East Coast Rovers (http://www.eastcoastrover.com/RoverV8.html) does chipping. You could also check with Rovers North (http://www.roversnorth.com) and JE Robison (http://www.robisonservice.com) for more info. I think your ECU needs to be a 14CUX to do the chip thing. __________________ Kevin 88 RRC "Audrey"

01-07-2005, 01:49 PM	#5 (permalink)
hamrendan Senior Member Join Date: Sep 2004 Location: Cottonwood CA near Redding Posts: 206 Gallery: 0	whoops.. I didn't understand that you had exchanged engines... my bad.. __________________ Any advice given in this forum is my 2 cents, which is roughly the value of said advice! Dan Hamren 93 LWB "Dubya" AKA "The Beast"

01-08-2005, 07:16 AM	#6 (permalink)
capnkerr Member Join Date: Sep 2004 Posts: 5 Gallery: 0	rechip I'll let you guys know the results after I install the 4.2 chip. Thanks for the responces. Shawn

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01-07-2005, 07:24 AM	#2 (permalink)
Disco Mike Moderator Join Date: Aug 2004 Location: Parker, Colorado Posts: 5,495 Gallery: 0	Shawn, I would suggest you contact some of the companies that do the rechipping and see what they suggest. Mike

01-08-2005, 08:43 AM	#7 (permalink)
TerryS Moderator Join Date: Aug 2004 Location: Bloomfield, CT If I died today, I lived there all my life. Posts: 2,182 Gallery: 0	I am assuming ( dangerous) that you used a 4.6 bottom end and put your 3.9 frontcover on, with pump & distributor. What cam did you use, as the 4.6 cam won't drive a distributor gear. I am not sure why you want to use a stock 4.2 chip, as opposed to one writen for 4.6. Are you doing this just because you are still using the 14CUX Lucas box?

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