PMO Carb Manifold Height Options

[defianty]

The engine I have for my six conversion is a 3.0 and was rebuilt and used as a spare for a guy who had an original RS. The engine was used whilst the RS engine was rebuilt. Once thing led to another and he only covered 1,000 miles with the 3.0 before the RS was complete.

The 3.0 had PMOs and I bought them with the engine. When I collected the engine all of the ancillaries were boxed separately and only today, almost a year later, when trying out the carbs for size I thought to myself - "Those look tall!"

Amongst the paper work I can see the 'Tall' manifolds were ordered and a quick google has revealed that these are going to be too tall for a 914, they measure 100mm. To big?

I'd speak to PMO themselves but I'm not sure how they'd be as I'm not the original owner. That and I don't know how to send a fax in 2017!

[brant]

honestly don't know if they will be too tall

they sell both tall and short
I actually run tall on a 2.0/6 race car with the engine lid on
but the height of your motor mount will likely determine if that works or not in your situation


the talls are great for small displacement motors when you are trying to fight an inversion problem and very aggressive cam shafts

I don't think they will be as important on a big bore 3.0 and you will probably notice no loss or problems if you do have to revert to the short version