who is the member that has a turbo 4 ?

There are a few. This might be the one you are thinking of:
http://www.914world.com/bbs2/index.php?showtopic=65883

McMark is running one.

McMark practically daily drives his...

My Turbo 1.7. Here's my thread about the car, link jumps to the turbo info: 1971 Gold Metallic Project
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Turbo 2.4 I built.
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Your second picture confuses me Mark

Because I was wrong and it's actually a 2576 (2.6l) engine? How can you tell?

Or because it's got carbs on it? Those were for break in.

Here's some more pics, and a link to more car/engine info

This was a really nice high dollar build for sale...and never sold.


http://www.914world.com/bbs2/index.php?sho...=257971&hl=


I think he still has it.

Yup, he decided to keep it.

Everyone knows you can't turbo a 914. McMark has proven everyone wrong.

Thanks McMark and all that posted I'll PM you soon.

You can't Turbo a 914

Heck, you cannot even run matching wheels!

Yup. Still have it.

Nope

You CAN as long as you don't let friends drive it.

(see signature links)

Friends don't ask friends if'n they they can drive their 914...

You can't turbo a 914, or at least you couldn't 16 years ago.

Click to view attachment
A twinturbo might have a small advantage in low rpm response.
Short 316 ss headers to a pair of quick spooling turbines.
A modern approach,with all the bells and whistles,water/fuel direct injection.
Roller tip rockers and lifters,a winder,and some durability built in.
When a ember is given more air,it will burn faster,hotter,and will melt a stock head.
Heat management is a considerable task,as a seat will pop out without due diligence.
A heat sink,strategically inserted into the T4 head to direct the heat to a channel of smaller resistance to conduction.
Being cool is also insulating the chamber and ex-port from the heat,modern machined and coated ceramics.
The limiting factor is the mass of the head and it's ability to lose heat,without losing strength.
More power,more air,more cooling,the circular unconditional loop.

Something like this,but with a type 4,auxiliary head cooling via oil/water/glycol.
https://www.youtube.com/watch?v=-HltZrFGJ4U

Easy to blow the heads off the flat four,a real careful build can keep it together.
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That the Harley Davidson patent drawing?

Amazing how small the water channels are on those yet I think it allowed a full point of compression increase.

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cfd,fea,now with cooling loop,about M8,bigger is better.
The flow rates keep the seat cool,so,a similar tubular coolant path around the ex-port will allow heat to be soaked away.
There is room there under the port for such a tube,the sizing at the minimum,the shape a smooth curve,turbulence free.


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