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Originally Posted by camcojb
I disagree. I've had both, and the dual Spal can't keep up with the Mark VIII fan. I'm speaking of the later model Mark VIII (97-later I believe), not the earlier one. I know their drawing isn't accurate as the late-model Mark VIII flows over 4000 cfm. Well, either that or they're misleading you by comparing to the older Mark VIII.
I had the dual Spal exactly set up as you've shown and my car would still hit 210 at idle with the a/c on a 100+ degree day. With no changes but the fan swap it wouldn't break 190. That tells me the Mark VIII definitely has more airflow.
Jody
Jody
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agreed, mark wests 509 camaro at pigeon forge had twin 11 inch spals and it would enot go below 210, vinnys car had twin 13 inch spals on a junk be cool radiator and it would run 190 with short times at 200 till the fans caught up.
mark viii for me from now on