Has anyone got any information on how a crankcase evacuation kit can be fitted with a oil catch can?? Diagram if possible. I am just trying to prove a point to a race scrutineer that it is possible. This is for race use and not road and we dont have any emission issues on cars of this age. Any help would be great. Regards Phil
I'm not sure I understand the question here. An evac system can be retrofitted onto just about any internal combustion engine which allows the ring tension of the entire pack to be reduced for improved power resulting from the reduction in drag/friction without any loss of ring seal.. or by actually improving ring seal in the process and reducing flutter(improved stability= improved seal). The logistics only require the custom mounts/pulley alignments and use of the previously mentioned low drag/thinner profiled rings in combination with can/hose/bung routing. Pretty simple stuff in the scheme of building race cars/motors and there's not much debate left at all in whether or not they work. Just a simple matter of matching the components together to get the best bang for the buck, is all. Endurance engines will obviously need different spec's than a drag engine. Hope that helps offset the debate even though there's no diagram included.
The "oil catch can" can be just a simple oil separator like used on compressed air lines. Guys running big boost also use pan evacuation to get rid of excess blowby as a PCV valve doesn't work real well with positive manifold pressure.
I am running a GZ Motorsports vacuum pump on my car, simple set up just pulls x amount of vacuum through one valve cover and an adjustable valve to set vacuum amount you desire to pull in the other valve cover, then it is vented to a catch can. Mine was the first small block Ford with my type of pulley set up that they had made, took a few measurements to get correct spacers. I have it set to pull 13 of vacuum at full throttle otherwise you rob oil from the wrist pins. Oil stays very clean, dont know how much it really helps but sure doesnt hurt any, tried header evac first and it didnt suck enough. Only real fall back is that once and a while it will have to be rebuilt and so far they have to be sent back to be freshened up.
Thanks for you advice guys, Im talking about the kit you weld in to your headers and the pipe goes to the rocker cover. I just wondered how you can install a catch tank in this set up and it still work as it should?
