Tricks for the engine case?

[Jon]

I have done the measuring and clearancing... now the cleaning awaits... Before I clean it, are there any tricks I can do to it? Like smoothing out any sharp edges or similar?  And what has the best effect when cleaning it?

[SOB/RFH]

Port the holes bellow the cylinders, all sharp corners should be broken with a radius.....polish the inside wherever you can get to it.......fitting of the bearings and oilpump compared to the oilholes in the case is most importent!!! Other then that....paint in in wrinkle finish for the perfect Empi look!! Happiness is a Hot VW!!

[Jon]

Polish it.. ok... will do... porting of the holes... to allow the oil to faster reach the sump?
I'm opening up the galleys to... easyer and safer cleaning.

[Roman]

I guess what SOB means is case porting. When the piston moves down in the cylinder the air below it will be pushed back in the case. You have the same air flow under the piston as above!! The case porting frees horsepower and lessens the case pressure.
Here is an example:


I have some more mods in my engine: Oiling slot in the lifter holes and a bypassed 1:st oil relief. These were some tricks done by JPM when he did the mods for the flanged crank.

[SOB/RFH]

Porting the case like the photo shows i mandatory in my non compromise book!. The inside of the piston moves as mouch air as the outside. Also think about the volume of the engine case.......I the engine gets bigger or revs higher it transports more air....If air is trapped you will have leaks from all over the engine and what is worse....it robbs power. So enlarging the case (by using an extra sump or dry sump) and makin the transportation of air easier is free horspower!! Happiness is a Hot VW!!

[Jon]

Ohh, I see, this is exactly the stuff I was looking for... and what a great picture... self-explanatory...
One the same thought, my "splash-plate" will be left out of this engine case... 

[Roman]

So here are some photos of the tricks that I promised.
*Oil groove in the lifter holes to increase oiling all around the lifter.
*Bypassed 1:st oil reilef valve for more consistant oil pressure.

Work done by JPM.

[Roman]

more...

[Jon]

Since I don't have the oilcooler in the fan housing I don't use the 1:st oil reilef valve... I'm going for JPM solution with the oil return... doesent seem like there are anything special in that solution?
Does anyone know what kind of threads that hole has?

[pupjoint]

correct me if i am wrong,

1. from the pics above, the setup was made to run without any doghouse oil cooler or any cooler in the shroud.

2. the pressure relief piston that control the oil to the oil cooler is now a return line for oil to come in?

so the oil goes from the pump, to oil filter, oil cooler and back into the block via the oil relief hole?

[JIMP]

In the setup that Roman showed you have to block this small bypass hole, else you can use the csp full flow adapter

http://csp-shop.de/cgi-bin/cshop2/front/shop_main.cgi?func=det&wkid=89299591879&rub1=Engine&rub2=Oil%20System%2COil%20Filtering&artnr=22198a&pn=0&sort=0&all=

which do the business without you having to block that small hole, or you can use same products from bugpack lets say

Friendly

Dimitrios

[Taylor]

Here is a good place to start
http://cal-look.no/lounge/index.php/topic,8007.0.html

Don't under estimate a well sorted stock oil system. But I did recently build a street motor with an external oil bypass and the CSP oil inlet like the one above and it worked great. Better than stock? who knows before I tear it down but I does work well.