Porker928

Greetings to all 356 owners.!

I have been reading a book recently on Porsches in general and it mentions that the 356 was produced with the exhausts exiting through the rear bumper for a ‘brief time’ before the idea was ‘abandoned’, but it does not say why?

What were the problems associated with this design?

Thanks.

Ben

356-930

There is a negative pressure effect at/on the 356 rear bumper and lower body panel when the vehicle is moving forward at speed, most any speed. This causes exhaust soot to turn back on the car which makes a mess of the bumper, body and exhaust tip extensions even when they are employed.
Not a problem if one enjoys constant cleaning cause then they look cool.

Porker928

Thanks Chris.

I hadn’t thought of that. I thought the problems would be heat related or something.

But now you come to mention it, I once had a TVR 420 SEAC which was basically square cut at the back and I was forever having to clean the soot of the back bumper, not helped by the fact that the bodywork was bright white.

Aerodynamics hey.

I don’t think my 928 will be suffering from this problem though as it’s a series 2 and the exhaust exits at a 45º from the corner. :o)

Cheers.

Ben