What is the difference between a TMO (Technomotive) chip, and a DSMChip?

TMO website by Todd Day
Todd greatly helped the DSM cause by introducing his chips in ~1998, but they have not been LEGALLY produced for several years now. There are several important differences:
1) The TMO chips always had STOCK timing and openloop AFR maps, whereas my chips are fully customizable to whatever octane fuel you run, your compression ratio, or stroke. These leaner maps will make more power, and the improved timing can GREATLY increase the amount of boost you are able to run on pumpgas. Most of my 1G chips feature expanded timing and openloop AFR maps. The factory maps topped out at ~15psi of boost. So, when you turn up the boost, an ECU with a stock or TMO chip is still trying to use timing advance intended for much less boost, limiting the amount of boost you can run because of knock issues. My chips will continue to adjust the timing as high as 24 or more psi of boost.

2) The TMO chips offered 5 different gauge selections, normally battery voltage, O2 voltage, timing advance, injector duty cycle, and "octane value". Instead, I have decided to offer just ONE gauge, usually knocksum, which I feel is the most essential ECU value to watch when tuning.

3) The TMO chips were "scrambled", such that their code was very hard to compare to the stock code, to discourage pirating. My chips are based on the stock E931 (1991/92 DSM) or E943 (GVR-4) code, so anyone can make changes to the chips later.

4) One feature Todd didn't offer was removal of the airflow cap. Only recently discovered, the 1G ECU caps the airflow at a value that roughly equated to 450 HP. When the ECU sees any amount of airflow beyond that, it substitutes a fixed, maximum value for the real amount of airflow, which will cause your injector pulsewidth to plateau, which will lean you out. My chips always remove this cap.

5) The TMO chips never corrected for larger injector sizes (other than 2 or 3 copies of his special TMO3 chip prototypes). So, you always had to still use an AFC or VPC to remove the extra airflow when running larger injectors, which causes more knock issues from being on the wrong maps. My chips can be ordered to exactly match the injector flow, injector deadtime, and base fuel pressure that you run.

6) As I said above, TMO chips are no longer made. So, when you buy a TMO chip off eBay there is a VERY high likelyhood you are putting money in some pirate's pocket, not Todd Day's.


Jeff Oberholtzer
http://www.dsmchips.com Please address any questions / comments to keydiver@yahoo.com

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