Home
What's new
Latest activity
Authors
Store
Latest reviews
Search products
Forums
New posts
Search forums
What's new
New posts
New listings
New products
New profile posts
Latest activity
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
Cart
Cart
Loading…
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Search titles only
By:
Menu
Log in
Register
Navigation
Install the app
Install
More options
Change style
Contact us
Close Menu
Forums
SVTPerformance's Chain of Restaurants
Tuning À la carte
Just installed AEM failsafe Wideband gauge & Datalogger
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="IUP99snake" data-source="post: 12229456" data-attributes="member: 7060"><p>You bring up an important point about the RPM input. I first tried connecting it to a coil as well, with the same results as you. Your shift light might work because it only activates at high rpm when there's only one spark (pulse) per firing revolution (.5 pulses per RPM). However, at idle and low RPM, the computer will fire the plugs multiple times during the firing stroke (Multiple Spark Discharge). That's what is throwing off your RPM readings. </p><p></p><p>When I hooked it up to an injector, I didn't think it would be a good source for the RPM input because I'm not too familiar with how they fire in relation to the crank position, engine speed, load, etc. All I knew was that they might also have .5 pulses per revolution. </p><p></p><p>Sure as shit, it was pretty accurate. And it doesn't matter which injector you use either. To double check the accuracy, I enabled the "dealer test" feature in the digital readout for the odometer to show a digital RPM readout in the dash cluster. I then compared that to the readout on the AEM program. Although the computer readout from the gauge had a "little" lag, it was pretty accurate. </p><p></p><p>Also, note some RPM spikes during the beginning of a pull. (See pictures 2, 3, and 4 in the beginning of this thread) I'm still trying to figure those out. Maybe the injector duty cycle is changing or something. </p><p></p><p>Nevertheless, you DONT need a tach adapter. Just find anything that has a pulse that's correlated with RPM and program it to the computer. Hook it up to an injector and tell me if you think it's pretty accurate. Even better, tell me if you see the same "RPM spikes" in your datalogs. </p><p></p><p>However, I am finding that the boost function is reading a little lower than my mechanical boost gauge is reading. My auto meter gauge will read 12-13 lbs of boost, but the datalog only says 10.4 LBS. They are both connected to the same exact hard line. Maybe the flexible line running to the AEM gauge got partially kinked when the A pillar cluster was snapped into place. However, at idle, they both read an identical amount for vacuum... 20 inches. So, maybe my mechanical boost gauge is reading a little high. </p><p></p><p>I'll have to look at it more. Maybe I'll record video of it during a pull and compare it to the datalogs.</p></blockquote><p></p>
[QUOTE="IUP99snake, post: 12229456, member: 7060"] You bring up an important point about the RPM input. I first tried connecting it to a coil as well, with the same results as you. Your shift light might work because it only activates at high rpm when there's only one spark (pulse) per firing revolution (.5 pulses per RPM). However, at idle and low RPM, the computer will fire the plugs multiple times during the firing stroke (Multiple Spark Discharge). That's what is throwing off your RPM readings. When I hooked it up to an injector, I didn't think it would be a good source for the RPM input because I'm not too familiar with how they fire in relation to the crank position, engine speed, load, etc. All I knew was that they might also have .5 pulses per revolution. Sure as shit, it was pretty accurate. And it doesn't matter which injector you use either. To double check the accuracy, I enabled the "dealer test" feature in the digital readout for the odometer to show a digital RPM readout in the dash cluster. I then compared that to the readout on the AEM program. Although the computer readout from the gauge had a "little" lag, it was pretty accurate. Also, note some RPM spikes during the beginning of a pull. (See pictures 2, 3, and 4 in the beginning of this thread) I'm still trying to figure those out. Maybe the injector duty cycle is changing or something. Nevertheless, you DONT need a tach adapter. Just find anything that has a pulse that's correlated with RPM and program it to the computer. Hook it up to an injector and tell me if you think it's pretty accurate. Even better, tell me if you see the same "RPM spikes" in your datalogs. However, I am finding that the boost function is reading a little lower than my mechanical boost gauge is reading. My auto meter gauge will read 12-13 lbs of boost, but the datalog only says 10.4 LBS. They are both connected to the same exact hard line. Maybe the flexible line running to the AEM gauge got partially kinked when the A pillar cluster was snapped into place. However, at idle, they both read an identical amount for vacuum... 20 inches. So, maybe my mechanical boost gauge is reading a little high. I'll have to look at it more. Maybe I'll record video of it during a pull and compare it to the datalogs. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
SVTPerformance's Chain of Restaurants
Tuning À la carte
Just installed AEM failsafe Wideband gauge & Datalogger
Top