Muffler and exchanger pairing Options

[trick-e]

Looking for a little help.
I’ve a ‘75 (originally a 1.8) upgraded with a ‘73 2.0.
I need a muffler, but am a bit confused on which one.
The heat exchanger exits into a single throat, triangle flange.
I ordered a used Bursch for a ‘73 2.0, but it’s a dual-throat ‘in’ and the trapezoid flange. Reading other threads/classifieds, the one I received should be the correct one.

So, different heat exchangers for different years of the 2.0?

I’m running a 4-tip Monza that’s rusted out.

-TK

[euro911]

There were three different styles of heat exchangers (HEs) used on the 914s over the years.

1. Early HE's came on the '70 ~ '72.5 ('early') cars. They had two orifices on each side, with upswept ends on the tail end where the trapezoidal flanges are.

2. ('73 ~ '74 cars) with 2.0L had a different style of HEs that were similar, but had larger diameter pipes and less upsweep on the tail end where the trapezoidal muffler flanges are.

3. '75 &'76 1.8L & 2.0L (considered 'late' cars) had a set of HEs (the single orifice with a triangular muffler flange type).


It appears that you ordered a muffler that fits the '73 ~ '74 2.0L HEs - so you would need to source a set of 2.0L HEs for it ... or ... if you plan to keep the 'late' ('75/'76) HEs, you'll need to get a muffler that fits the 'late' HEs.


EDIT: I see Rich beat me to the answer(s) while I was slowly typing (IMG:style_emoticons/default/laugh.gif)