Experience with Unichip for 3.4l 4Runner?
04-12-2009, 09:42 AM
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Experience with Unichip for 3.4l 4Runner?
I was looking at the Unichip website and noticed they had a chip for my 4Runner. Gains are supposedly 20 hp and 30 ft/lbs of torque for a truck with an intake an exhaust, which mine has. Price is right around $400. Does anybody have any experience with these chips on their 4Runners/Tacomas? It doesn't seem like too bad of price for the gain.
04-12-2009, 10:47 AM
#2
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Gadget tried something like that: http://www.gadgetonline.com/Fuel.htm
Quote from link above:
Quote from link above:
ECU Upgrade:
JET ECU Upgrade:
I was looking through the Performance Products catalogue and saw the listing for the JET Chip. It claimed a 17HP increase. Well that sounded great.
I visited a friend who owns a auto salvage chain. He was able to get a spare ECU for my 4Runner. I installed it in my 4Runner to verify that is worked, and then sent it off to JET. I had it back the second day.
I installed it and took it for a drive. I was very disappointed that I did not notice any difference. I called JET to inquire and was told it takes 100 miles for the computer to adjust itself. I drove for quiet a while and never really noticed a difference. I even swapped back and forth with my stock ECU and still could not notice any difference in the way it performed.
I do not recommend the JET ECU upgrade.
JET ECU Upgrade:
I was looking through the Performance Products catalogue and saw the listing for the JET Chip. It claimed a 17HP increase. Well that sounded great.
I visited a friend who owns a auto salvage chain. He was able to get a spare ECU for my 4Runner. I installed it in my 4Runner to verify that is worked, and then sent it off to JET. I had it back the second day.
I installed it and took it for a drive. I was very disappointed that I did not notice any difference. I called JET to inquire and was told it takes 100 miles for the computer to adjust itself. I drove for quiet a while and never really noticed a difference. I even swapped back and forth with my stock ECU and still could not notice any difference in the way it performed.
I do not recommend the JET ECU upgrade.
04-12-2009, 11:30 AM
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Thanks for the info. I noticed the writeup on the EL Prototypes ECU reflash, but it looks like they aren't in business anymore anyways. Any other chips or ECU reflashes out there that are worth it?
04-12-2009, 12:39 PM
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Well there have been reported gains with NA engines from using a piggy back controller but they are mainly used for blown engines. Contact URD for details about what controller you could use and what kind of gains you might see. http://www.urdusa.com/
Something like this unit: http://www.urdusa.com/product_info.p..._id=1260198051
I'm using the URD MAF/Timing Calibrator and it works very good for tuning my boosted engine. You really need a wide band A/F gauge to tune it though. So add in that cost too.
Something like this unit: http://www.urdusa.com/product_info.p..._id=1260198051
I'm using the URD MAF/Timing Calibrator and it works very good for tuning my boosted engine. You really need a wide band A/F gauge to tune it though. So add in that cost too.
Last edited by mt_goat; 04-12-2009 at 02:23 PM.
04-12-2009, 01:05 PM
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Well there have been reported gains with NA engines from using a piggy back controller but they are mainly used for blown engines. Contact URD for details about what controller you could use and what kind of gains you might see. http://www.urdusa.com/
Something like this unit: http://www.urdusa.com/product_info.p..._id=1260198051
I'm using the URD MAF/Timing Calibrator and it works very good for tuning by boosted engine. You really need a wide band A/F gauge to tune it though. So add in that cost too.
Something like this unit: http://www.urdusa.com/product_info.p..._id=1260198051
I'm using the URD MAF/Timing Calibrator and it works very good for tuning by boosted engine. You really need a wide band A/F gauge to tune it though. So add in that cost too.
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04-13-2009, 05:35 AM
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Then if you later decided to put on a supercharger you'd already have some of what you need to tune that.
I moved my hazard switch and mounted mine up in its place:
Last edited by mt_goat; 04-13-2009 at 05:40 AM.
04-13-2009, 02:14 PM
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I threw in the unichip a while back and have been pleased with it so far. At first I thought the mapping was going to be "cookie cutter", but it's worked very well for my application.
04-13-2009, 02:24 PM
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Talk to Gadget, maybe he could set you up with a "cookie cutter" fuel map that you could use without a tune, but keep in mind you are trying to improve on an ECU fuel map set up by Toyota engineers that uses constant feed back from sensors to self-adjust. You could make it worse instead of better. If you don't have the proper tools to see what's going on, its harder.
04-13-2009, 04:46 PM
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Would you say you noticed the advertised dynoed 35hp at the crank increase for the S/C with the Unichip?
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