Speedo pulse limits

[VHR]

Ever since I put 4.88's in my 00 camaro, the speedometer vss has been way wrong vs. mph on my time slips. I think I figured out that my required H0101 pulses per mi exceed EFILive imposed limits. Can someone provide a solution?
(p.s. tire dia. is 27.75).

[VHR]

Looking at the equation makes me think that if i change the H0102 pulses per revolution to a lower value it will produce a number that will not exceed the H0101 limits. Can someone take look and see if I'm correct?

[Blacky]

Try these:

If its an auto:
H0101 = 141867 ppm
H0102 = 40
H0103 = 4.88
H0104 = 3546

If its a manual:
H0101 = 60293 ppm
H0102 = 17
H0103 = 4.88
H0104 = 3546

Regards
Paul

[VHR]

When I type that in and then go to the next box, it immediately reverts to 117963 which is the maximum in the limits box.



Thank you,
Vinny

[Blacky]

Are you using the latest version V7.4.2 of the software available here:
http://www.efilive.com/download.aspx

I think that the limits on H1010 were set too low in a previous release. I think the limit was too low to support anything above 3.90 diff.

The latest version V4.7.2 should have the limit raised to 157478.

Regards
Paul

[VHR]

I just downloaded the latest version, but the limits are still to low;129759.

Thank You,
Vinny

[Blacky]

My mistake, I forgot to mention that you also need to download the update to V7.4.2 here:
http://forum.efilive.com/showthread.php?t=5890

If that still does not increase the limits, send me your PCM's Operating System number, so I can figure out why.

Regards
Paul

[VHR]

Paul, I just found a thread the gist of which leads me to believe I may have to change to a later operating system from my 2000 system to prevent damage to my PCM. Is this possible?

Thank You
Vinny

[VHR]

I did those updates and the limits are the same. my OS is 09381344.

[Blacky]

Paul, I just found a thread the gist of which leads me to believe I may have to change to a later operating system from my 2000 system to prevent damage to my PCM. Is this possible?

Thank You
Vinny

Setting it to it's maximum or minimun vaue may cause a fault in the PCM. EFILive restricts the max/min limits so that you cannot set them too high or too low. We were too cautious in our initial limits which only allowed up to 3.9 diff ratio.

I know the V7.5.1 release has the limits set correctly. I thought it had also been done for the V7.5.2 release/update - but evidently not.

Subscribe to this thread to get notification of when the 7.5.2 pre-release is available:
http://forum.efilive.com/showthread.php?t=4442

The V7.5.2 release should be available before this weekend (Sep 21, 2007).

Regards
Paul