Mythbuster: continuing project thread of my 1303 '75

[Wally]

Yes, Deutz 102mm cylinders this time around, so I paid a little more attention to cooling as its not Biral material: bigger oil cooler and side scoops to ventilate the engine bay better when the turbo is back in there (after I do my N/A runs with it).

So, plan is to dyno it N/A first to get some baseline again and since I need to make my exhaust myself anyways, I wanted to incorporate some anti-reversion chambers in there at the same time.

[Wally]

[wouter1303]

That's nog going to work Wally
Or does it collect at the bottom and going to the front?

[Wally]

Originally Posted by wouter1303

That's nog going to work Wally
Or does it collect at the bottom and going to the front?

Its meant to become (work in progress) a 4-2-1 header system with anti-reversion chambers build-in. Its also partially stepped
And it will be possible to retain my twin spark operation (the former of-the-shelf type 1 header I used made it impossible to use the bottom plugs as thats where the 1 and 3 headers ran...), so I am hoping for excellent results, even though its a low compression engine (buid for boost).

[LLVWGL]

Front mount Oil cooler?

[Wally]

Originally Posted by LLVWGL

Front mount Oil cooler?

Yes, big one, fits just behind front apron.

Here is the old (small, old Mercedes transmission cooler) one and the current one:

[effvee]

Hello, question, how do you feel about twin scroll turbos?

[Wally]

Originally Posted by effvee

Hello, question, how do you feel about twin scroll turbos?

Very positively as I have run them on the last 3 engines 😉

[DORIGTT]

Wally,
How much ground clearance do you have with the exhaust header setup the way it is?

[Wally]

Originally Posted by DORIGTT

Wally,
How much ground clearance do you have with the exhaust header setup the way it is?

As the car sits now (I just measured for you) almost 5 inches (12cm). Silencer is a little over 4 inches..

[Steve C]

Hi Wally

Looking good. Is that an OEM oil cooler or an aftermarket one? Does it fit behind the rear apron without any modification? I'm asking because I'm yet to source an oil cooler for my sons Beetle.

Steve

[Wally]

Originally Posted by Steve C

Hi Wally

Looking good. Is that an OEM oil cooler or an aftermarket one? Does it fit behind the rear apron without any modification? I'm asking because I'm yet to source an oil cooler for my sons Beetle.

Steve

Its apperently an OEM oilcooler, but its from a more obscure model (AMG?) Mercedes or so I understood. It has no part numbers, but I was looking for an upgraded one with the same M22x1,5 thread connections.
The guy in Poland had 2 or 3 of those...
It fits so snug directly behind the front apron and the spare wheel well, that I didn't even need mounting tabs or something! I just ty-wrapped it to both outer grill mesh holes

Oil feed from tank in the nose to engine is AN12. Oil suction and back to the front oil cooler and then tank is just 1/2" (13mm iirc) inner diameter oil line.
No problem like that for over 13 years now with all engines

[Wally]

For those that don't do FB or STF, I got the engine on the dyno yesterday and it did even better then I expected!



244Nm @6K and 226,5 CHP @ 7K with the low CR engine with air filters, muffler and horizontal fan belt running up to 8K made me very happy

https://www.youtube.com/watch?v=LKhbYc0gOGY

[owdlvr]

Wally, what do you use for lines for the oil cooler, and how have you routed them? -10AN I'm presuming?

[Steve C]

nice