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I'll post the steps I used in building the new inlet runners. It may be useful to others wanting to do the same thing, particularly if you only have home workshop tools and can do a bit of basic welding.

David

The bigger runners on the plenum would have been better but I'm not sure there's much to gain on a stock 3.0L particularly with the new intake. That's my next project, and this plenum will then go on my 2.5 GTV6 with a new intake and Megasquirt. Yes with Megasquirt the AFM is gone completely. 75mm s...

Seb, The AAV holes only need drilling and tapping. The place to mount it is the same as the 2.5. PACE extractors, off the 2.5 Barry, 41mm or there abouts. Seems to be ample for the stock 3.0L I'll post some pics of the runner build process. Jacob, I'm using the stock hydraulic tensioner. Installed a...

SeB,
You may have noticed the different alternator, it's off a Merc, not sure what model, but as an 85amp upgrade it fitted easily, just a minor change to the bottom and top spacers.

Does you car have air conditioning? You will need to drill and tap the top AC compressor mount bolt hole.

David

Seb, Have you bolted up the rear engine mount at the end of the bell housing? It will fit but just needs a bit of leverage to line up the holes. The AAV is still needed with the MS, I'm not sure how the Motronic handles the cold start warmup where extra air is needed. You'll love the power increase ...

A few more photos

My 3.0L 12V is installed and running in my 85 GTV6. Here are a few photo's of the process. I made new intake runners, bored out the 2.5 plennum and made a new intake with K&N filter. I used the 3.0L injectors and installed Megasquirt. A few things to look out for with the conversion, the whole e...

Keith is correct, the sunroof seal was never intended to be totally waterproof. The four drain holes take any water that has got past the seal down under the car. They drain behind both front and rear wheel wells. Be careful poking the holes from the top as you my push the PVC hose off the metal dra...

Peter, Thanks for the link to the new site. I was afraid the GTV6 site was lost forever. I've just completed my 85 GTV6 3.0L conversion and MS installation. I had some problems with tuning issues and thanks to Peter's assistance (or should that be persistence) the car is now running beautifully. Wit...