Desperate for some Help With Microsquirt, Beyond Frustrated |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Desperate for some Help With Microsquirt, Beyond Frustrated |
Mblizzard |
Aug 25 2017, 04:54 PM
Post
#1
|
Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
I have been trying to get my conversion done in time for Okteenerfest. I have run up against a brick wall and just cant seem to figure out what i am doing wrong.
If anyone can help me by looking at my tune files or providing insight it will be very much appreciated. I can get th car to idle but nothing beyond that. Any use of the throttle is less than impressive and almost useless. Meaning it bogs down and does not accelerate at all. I have no clue what i am missing. 2056 with new low impeadance injectors. Bosch Wideband O2 sensor. Really need some suggestions. Not sure if i can post the tune files here. But will try. |
Mblizzard |
Sep 3 2017, 05:55 AM
Post
#2
|
Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
Thanks to some very sound advice and guidance above and beyond my wildest expectations. I got to drive the car! Still have a few bugs to work out but overall proforem very well. I think there is more to fix and tune but i can say that even in this less than perfect state this systems performs better than the stock system.
Got to recheck for vac leaks, get the idle control valve set, and revise the AFR and VE tables to fill in a few gaps. Seems to be wandering just a bit on the AFR at times and i have a few values in the current table that just don't work. Going to try and import a table James provided. Thank you sir! |
JamesM |
Sep 3 2017, 10:32 PM
Post
#3
|
Senior Member Group: Members Posts: 1,895 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
Thanks to some very sound advice and guidance above and beyond my wildest expectations. I got to drive the car! Still have a few bugs to work out but overall proforem very well. I think there is more to fix and tune but i can say that even in this less than perfect state this systems performs better than the stock system. Got to recheck for vac leaks, get the idle control valve set, and revise the AFR and VE tables to fill in a few gaps. Seems to be wandering just a bit on the AFR at times and i have a few values in the current table that just don't work. Going to try and import a table James provided. Thank you sir! The VE table will still need a lot of work especially in the upper range. The change I made to the RPM bins should make that a little easier. I didnt touch the tune, just the scale. The idle wandering you you may be able to work out just by spending more time on that area, if not a trick I like to do to control idle better is to bracket the RPM bins around your target idle speed. Say you want to set your idle to 950 RPM you can set one of the RPM columns to 800 and the next one at 1200, then set the VE values in both columns the same. What this does is ensure there is a constant VE value for the entire range the car idles in. Otherwise you can experience sort of a runwaway condition at idle. The area between two VE bins is interpolated so if that interpolation creates a slope your idle can be somewhat unpredictable. Bracketing the RPM range with the same values ensures there is no slope for the idle to climb up. Now you get to the fun part, the never ending quest for a perfect VE table! (IMG:style_emoticons/default/smile.gif) Given your timing control is mechanical you will probably find you will be unable to get 100% consistant results with the VE table. Timing affects fuel needs and there will always be some variance as to when the advance is coming on. Just as long as your "close" is landing somewhere between 12.5-13.5 AFR in the mid rpm range you should be good. Of course I know you want to go to full ignition control somewhere down the line as that is where the extra power is hiding! |
Lo-Fi Version | Time is now: 8th May 2024 - 12:33 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |