Sensor signal massaging

[kbbeckius]

One method used in an effort to improve performance on computer controlled vehicles is to alter the signal coming from certain sensors. There are many ways this is accomplished, on some vehicles moving the IAT sensor to an area of cooler air is supposed to cause fuel enrichment, or in a more complicated scheme JET's power module for the LT-1s intercepts and modifies many of the engines sensors. I was wondering if anyone had any experiance with these devices, opinions, comments, etc..

There are two such devices I found which should work on our vehicles.

1. TPS signal modifier, this one is from Caspers electronics
http://www.cAsperselectronics.com/cgi-local/store/commerce.cgi?product=GMCARS
This device tricks the ECU into going WOT at throttle positions greater than 70%

2. O2 signal modifer?, from Hyperspeed
http://www.hyperspeed.com/
This device (I'm guessing) modifies the 02 signal based on an RPM cut in point, to provide fuel enrichment.

I guess to a point these devices shouldn't (although they could) be used together, as (I believe) the O2 signal is ignored by our ECU at WOT, thus negating the effects of the Hyperspeed device.

Thx Brad

<font size=-1>[ This Message was edited by: kbbeckius on 2002-02-16 13:59 ]</font>

 

[smeagol]

Kinda worthless devices IMO.

The TPS thing - just press the pedal further.. all it will do is alter part throttle performance, from like 70-90% throttle. Will it make it faster? Maybe, maybe not... With a Syty, the fueling & timing is based off of manifold pressure & RPM, not off of TPS reading. The only thing it will do is alter the point at which PE mode occurs, and if it's at 70% when it begins working, it may not change a thing.

The 02 signal massager.. not going to do much in a Syty, unless you really want to change your closed loop drivability, and who knows how it will affect it. Vague products like these are usually snake oil, just read the terminology (optimized, improved response..). WOT conditions will be calculated based on manifold pressure, RPM.. not 02 feedback.

Spend the money on some chip burning stuff, or an aftermarket ECM.. those will really be able to help if you know what you are doing.

 

[V6 Kompressor]

And, I wouldn't put anything on the truck that alters the O2 input, you may be changing plugs daily if you do...and if it tells the ecm that you are rich, when you are lean....I smell burnt pistons....molten aluminum...just like at the drag races in Florida....