Performance wasn't an issue.  The shape of the DB-30618 was such that minimal changes were needed to fit it where the original RX7 cooler was.

Steve Boese

> On Jun 27, 2018, at 3:13 PM, Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
>
> Thanks Steve
> I cant find the rotary archive on the lancair site.
> The DB-30617 shape would fit my space available and diffuser better. Did you change to the DB-30618 for share under the cowl or was it related to the performance of the single pass unit?
>
> Steve Izett
>
>> On 28 Jun 2018, at 1:37 am, Steven W. Boese SBoese@uwyo.edu <flyrotary@lancaironline.net> wrote:
>>
>> DB-30617
>
>
> --
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