Quote:
Originally Posted by Daves1SS
Edelbrock says my scans look fine, and the peak 160 degree IAT's made sense to them due to me testing in upper 80 degree weather. Ed, their response to me saying yours had gotten up to 185 degrees in similar weather was maybe your IC system could use more bleeding and/or not enough gentle good air flow drive time between the WOT runs.
Here's what they said about my scan:
As for the spark values we are seeing in the logs they look correct in comparison to the data we have collected from our vehicles. Disregard the knock retard you are seeing because LiveLink isn’t reading that value correctly for the new E92 ECM’s in these vehicles. We compared the spark values being commanded in your log at low and high rpm to ours and you are within .25-.5°. To put it simply everything looks good considering the warm weather you’re in.
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Thanks for the feedback Dave. Interesting comment about the KR not being accurate across liveLink. If I remember right, the SCT scanner can either request PID or OBD information. Can't remember which channel type the KR is on.
Also thanks for asking about my IAT for me. I checked the flow on my heat exchanger and its fine, no air in the system. Regardless of what Edelbrock says, I still think the IATs are too high.
I would like to know what the IAT table looks like for this ECM, but I would bet a cold beer that 185 F is high enough to pull some timing and torque, unless Edelbrock tuners tuned around the stock table.
I have a few ideas on getting the IAT down. On my Audi, I added a nylon insulator spacer/gasket between the intake and the head. This little insulator trick did lower the measured IAT around 15-20 F. So I'm thinking of cutting some nylon insulation spacers and putting them in between the SC and the heads, like a thick gasket. Should reduce heat transfer from the heads and
maybe help the IATs.
The other improvement I see is getting air through the three layers of radiator, condenser, and heat exchanger. A larger/more efficient fan that kicks on earlier might also help.
Another option is to add a secondary heat exchanger to the Edelbrock one. But right now, I don't see a spot to put one that doesn't interfere with airflow to the other coolers. Maybe a bigger heat exchanger to replace the Edelbrock?
And of course, a 170-180 F t-stat.
I'm gonna try the t-stat and the nylon insulators first, then move on to the more difficult later. I want to be able to run this thing hard for more than 15 seconds.