Improving engine cooling when you already have a Porsche 911 cooling kit

[Sandeep]

When I did my T4 install, I ran the 911 setup with no sealing tin and no cutout behind the rear licence plate. My head temps were about 395F stationary and about 420F on the highway (#4 cyl).

When I rejetted my carbs (too lean) and made up some sealing tin to seal the fan from the BAS header (fan was sucking in air preheated by header) the stationary temps dropped to about 365F and 385F on the highway.

I then made the cut to enlarge the space behind the licence plate as I thought the 911 fan was not getting enough air from the stock grill openings ... guess what .. the temps dropped again .. about 340F stationary and 365F pushing it hard on the highway.

So the 911 setup works for me ... only problem is heating the oil .. it takes about a 15min drive to get the oil up to 180F (remote cooler with thermostat).

So, make sure you seal the engine bay and make the cut behind the licence plate and offset your licence plate by about 1.5" like SamC suggested.

Sandeep