Resolved 1G ECU chip question

[GSEclipse620]

I was wondering if anyone out there has chipped their ECU? I would like to do this in my build coming up because I've never had any experience with tuning and don't want to risk messing up my car. An ECU chip can compensate for bigger injectors. How efficiently does it do this? Do you guys out there running chips have a good idle/good throttle response? I believe I have to have my ECU socketed for this right?

Where would I be able to have that done? Can I have it done on any (1g) GS-T ECU? Thanks

 

[Quasimondo]

ECU socketing is recommended when you replace the chip, though not necessary. Just makes the job easier when you want to remap your ECU with another chip.

www.dsmchips.com. They can hook you up with a remapped chip customized for your application. Jeff Oberholtzer's a good guy, he'll take care of you.

 

[GSEclipse620]

cool thanks man!

 

[JayRolla]

You can't just burn your ECU and throw larger injectors in. You need something to fine tune the injectors after you burn the ECU, because all DSM's are different. You can tune up to 650's on a SAFC without a chipped ECU. Since you don't want to do the tuning take it to a local dyno and have them do the tuning.

 

[steve]

You can't just burn your ECU and throw larger injectors in.

Actually you can and do a better job than you ever could with an SAFC.

It helps to have your injectors flow tested so you know exactly what size they are. You may need to make several versions of your chip to get the parameters correct unless you know the injector deadtime but once your done the car will run as if it came that way.

Steve

 

[JayRolla]

So just by telling them what size injectors and how much timing you have and boost you will be running they can burn the ECU so you don't have to do any tuning. I thought you needed a fuel controller to fine tune it, since DSM's are so inconsistant.

 

[steve]

The programming is only as good as the data you provide. If you have the right information you get the right results.

A DSM isn't any more or less inconsistant and any other car if it's maintained. The factory programming still works in most of the cars even after all these years. The problem is in where you get the data to tell "them". If you haven't had your injectors flow tested you really don't know what size they are and the deadtime for most aftermarket injectors are just guesses.

If you've hacked your MAF all bets are off because you have a one of a kind air metering device, making if difficult for someone to pull the right numbers out of a hat and send you a chip. MAFTs are almost as bad.

If your burning the chips you can fine tune the settings for your injectors and MAF so that any changes to the fuel and timing maps do exactly what is expected.

The "ultimate" chipping right now is DSMLink since it allows you to change the ECU parameters without burning another chip or knowing how. Guys with Ostrichs have realtime ability to change anything directly but you need to have intimate knowledge of how the ECU and software works to make changes.

 

[jepherz]

Every car is going to have some inconsistancy in it, that's partially why we have fuel trims and o2 sensors. Afterall, they ship the cars from the factory with the exact same scenario; all of the ECU's are programmed for the same injector sizes.

Also, keep in mind that you aren't just "compensating" with the EPROM when you change the injector size, you are making it run as a stock car with larger injectors. 4g63's in Japan had several options in terms of turbos and overall HP. With these options came larger injectors, and the only change in the ECU is the global fuel value.

 

[JayRolla]

Very good points. The dyno here does a lot of DSM's and they say they are the most inconsistant car when it comes to tuning. His quote " one car with a 16g can handle 17psi and another with same mods can handle 20-22psi. Depends on the car" he said.

Thanks for the good answer, one of the best responses I've had in a while.

 

[ThunderValley]

I run the ostrich emulator and I like it alot. Chip burning on the fly. I use a MAFT to fine tune, but I don't like it. Personally I would buy an SAFC next time and use a 2G MAF. www.moates.net can hook you up with the emulator. Nice company to deal with.