Originally Posted by grip grip

I removed the 2nd heat exchanger tonight after looking at my datalogs.

My IAT's would climb around 55 degrees prior to installing the 2nd HE. After installing the 2nd HE my IAT's climbed over 90 degrees. Both datalogs are from 181 pulley only, non-stacked runs.

Single large HE:

Starting IAT: 77F
Ending IAT: 133F
Increase: 56 degrees


Large HE and Factory HE connected in series:

Starting IAT: 75F
Ending IAT: 165F
Increase: 90 degrees