The Porsche 911 V8 TwinTurbo!

I haven’t been working on a big-scale’s for a long time (with exception to the Citroen DS, which is a bad, bad, bad kit) I haven’t been over here either.
But recently I started to look again and I noticed the SMC Contest, which I thought was a good excuse to start on a new big-scale project.
I was planning a big scale for 2012 and I just start a little earlier, I hope I can finish this one on time.

It was hard to decide what to do with this kit, I choose this kit, since it has some nice details to it and it is a good exercise for my 1/12 Tamiya’s. Since I do tend to make something different, I wanted to do something custom.
But I found that it is hard to make something different, I kept looking through a lot of Google images of one-off 911’s, custom-911’s and concepts, but could not find that what I was looking for. Then I had the idea to put a different engine in the 911, but stopped quickly, because I did not had a good engine for this idea. In the end I thought it would be cool to modernise the Porsche, give it a modern Targa roof and maybe some custom parts.
Then I remembered I got a bag of 1/12 parts at the Revell factory in Germany and browsed through that bag, I found myself a almost complete Ferrari F40 engine and from there on, things finally took a good course and I could start.

The idea now is to fit the F40 engine in the front of the Porsche and make the first good-handling 911 ever ;-)

Let the pictures do some talking too:

The boxart:


And the first problem is slightly noticable, the nose of the 911, is not meant for such a big/high engine



It is also coming way too much into the interior


Even though the seats will fit somewhat next to it, it is not realistic


If I still have some time left, I will make the targa roof, it will be huge and replace basically the whole roof


Another angle, this will show how much higher the F40 engine is.


I told in the contest-thread about the work I have to redo because of the previous owner, i started here on filling the bumper, and from there on, I will add some vents. Perhaps RS-Style


One reason why the engine is so long, is because the diff is build in, due to it’s place in the F40, since we don’t need the diff here…


We omitt it, and shorten the gearbox


The floorpan got cut-out, to give me there some room for the engine as well, I can now place it a little bit lower, I can use every single mm I can find.


Since I still have the right mood for this build, (and enough courage) I keep working on it. My main target is to get the all the changes basically right. I am not looking for perfect look, that will come after all the changes are correct and work the way I want them too. The biggest hurdle has been taken; the engine does now fit in the engine bay, now I need to fit all the other parts around the engine.

I cut the wheel-wells open, it appeared that the engine with the exhausts, was too wide for the narrow enginebay of the Porsche


After cutting both sides out, the engine fits in the enginebay, I also reversed the exhausts, instead of going backwards, they now point forwards, this way, I can create some room for the twin turbo’s


I used the enginemounts from the F40 chassis and crudily glued them to the frame of the Porsche, in a later stage it will be looking better.


And a little mock-up, I modified and installed the firewall, and the engine is now hanging in it’s mounts. This somewhat definitive mock-up gives me the chance to see where everything will fit and where there will be some more space available.




This photo shows how far the engine now sits in the interior, I hope it isn’t too much and will be looking convincing when I made a tunnel for it.


You can tell in this picture that I do now have enough clearance for the hood.


The turbo’s that will be fitted in the front of the engine, The big question now is where does the exhaust go, where does the intercoolers go and the intake.


2 options for the intercooler, still not sure what would work and look best. Remind you, I also have to make openings in the hood and it needs to be looking convincing.


Fortunately I will have some room for the radiator and some tubing in the front of the engine.


I will cut the bumper open here, but not sure whether to use it for the intercoolers or the airintake.


This is I think the last ‘rapid’ update, since the main ‘route’ has been chosen and the roughest cuts has been made, time will now be consumed making little details, changes and finish the rough cuts. I already dissassembled the engine, so I can work on making it nice and I also started on the chassis, putting things back together, strengthen it and finish it.

I made from an pen a crude mcpherson, this way I can tell how much space there is for the exhausts and how much ground clearance I have. The chassis is seen upside down.


It is a little bit better visible in this picture, I don’t like the kit parts, so I will be making my own mcphersons. (If the 911 uses them, I’m not sure)


This photo shows how much, or actually how little, space there is between the exhausts and the suspension


Seen from another angle


I also slimmed down the intercoolers, they will be mounted on top of the engine and needs to be thinner in order to fit between the hood and the engine.


This is probably the setup I will be using, 2 top-mounted intercoolers, with a oil-cooler in between.

I cut the Turbo’s in 4 parts, the intake and exhaust part are omitted for now and the slughouse are glued together to see how the tubing needs to go. Instead of going around or over the engine, the turbo tubing is going through the engine, in between the intake manifolds. There is a nice tunnel and I see no reason why not to use those important millimeters.


This shows the rideheight I’ve chosen for the 911, I went for a worse-case scenario and have the car sitting quite low. In this case, I can always let it ride higher if needed for clearance.


Making the tubing for the turbo’s prove to be a tricky job, I have stopped with it for now. I want to finish the engine, make it definitive and then start on the tubing. I think it will be easier that way


I added here the exhaust part, I think the best way is to route them back over the exhausts. It is the only place where I have room for those extreme hot exhausts.


Seen from above, the white square thing will be the car’s radiator. I think I just have enough space to add a electrical fan.


And so the fun of filling and sanding begins……ugh!


A small update, work has been slowing down, since it is now fiddling and filling and sanding.

In this picture you can see the disassembled engine, and some of the sanding/filling work on the inner fenders. I also glued the firewall in place, this way I can make some modifications to it and hopefully it will fit after the car goes on the chassis later on. fingers crossed.

I thickened the lower chassis struts and started on filling and sanding the engine mounts.


This is how the firewall looks from the cabin-side, I glued to struts to the firewall in hope it will keep it in the right angle and I can work from that.


And another small update, working with finishing details is just soooo slow…

I worked some more on the wheel-wells, I am making an insert here, that will fit over the exhaust and makes it possible to close it enough.


This picture might show it a little bit better.


When having a modelling-event yesterday, I could work some on the back end of the car, I also drew some ideas on the body, like having an air-vent on the side of the cars, this will allow air to escape after it came through the intercoolers.


The car also needs a filler-cap on the back-end now


The boot will be in 2 parts, the lower part for the battery and the spare-tyre and the top part for luggage.


And I made a small compartment between the boot and the rear-seats, this will hold the gas-tank.



Porsche used on this 911 suspension with torque-bars ( I think ) and I am going to replace that with independent double wishbone suspension.


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