Engine Dyno ? Fast 102 Intake MAF and 36 lb injectors

[dave w]

I forgot about the Abuse mode to disable VSS... this may be the trick. Engine is on Engine Dyno, no vehicle or chassis... seperate room for engine and controls.

Found this information on the EFI Live forum.

http://forum.efilive.com/showthread....arness...got-a

Seems like maybe the Park / Neutral parameter needs adjusting also.

dave w

[mecanicman]

I do standalones a lot. Using a an auto tune is not an issue at all. But I do recommend having a speed sensor input of some sort. I can post up the ones I use if you need them, fit any transmission with a speedo cable output. If you dont use them some idle and timing tables are not referanced. With a speed sensor stand alone harness on auto tune you end up increasing running airflow more than normal to keep it from stalling, but beyond that it runs great.

[dave w]

I can post up the ones (speed sensor) I use if you need them, fit any transmission with a speedo cable output.

I would greatly appreciate the speed sensor information!

dave w

[EagleMark]

Not sure how I can get VSS with no transmission on an engine dyno?

[dave w]

Not sure how I can get VSS with no transmission on an engine dyno?

Something like the 40 tooth per drive shaft revolution VSS pictured below, but mounted to the harmonic balancer. I'm thinking it would be 1:1 final drive ratio? Maybe it would be Transmission Input Speed Sensor (TISS) if mounted to the harmonic balancer?

dave w

[mecanicman]

Not sure how I can get VSS with no transmission on an engine dyno?

Without the speed signal you will run off of the idle timing table. Beyond that for the dyno it will be fine. You just have to transfer the timing table to high octane later. If it does not get a speed sensor, it will never run off of high/low octane tables.

[EagleMark]

I use the dakota digital sensor from summit racing, SEN-01-4160, its a 8000 pulse/mile , or 8 pulse/rev. This sensor is cheapest I have found anywhere at $39.00 from summit.

Thanks! I need a cheap VSS for the kids Toyota 22RE now on GM ECM and DIS!

Without the speed signal you will run off of the idle timing table. Beyond that for the dyno it will be fine. You just have to transfer the timing table to high octane later. If it does not get a speed sensor, it will never run off of high/low octane tables.

Since it will be run under load I'm thinking I should build a Park/Neutral spark advance table based on high octane table? They do have race fuel at dyno but car will be run on street 93 non ethenol fuel.

[mecanicman]

I typically make them all the same anyway. With cammed vehicles they dont like jumping from idle park to idle gear to high octane moving tables with different values. You just lose resolution running the idle spark tables.

[mecanicman]

I use the dakota digital sensor from summit racing, SEN-01-4160, its a 8000 pulse/mile , or 8 pulse/rev. This sensor is cheapest I have found anywhere at $39.00 from summit.

[mecanicman]

Guess I should clarify, my comments are more meant for making it run in the vehicle. For the dyno it will be fine without speed signal as long as you realize its not using the high/low timing tables. Having the speed signal allows the pcm to switch modes from idle to moving. It can be made to run without speed signal, but I much prefer having one.