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Mon Nov 03, 2008 7:01 pm

anyone have some input on these for a stock 1600dp ?
..as in would they work..what else would I need...are they worth a damn...what would be the best location on the valve covers to install them...... and would there be any real benefits to using them ?
http://www2.cip1.com/ProductDetails.asp?ProductCode=ACC%2DC10%2D5652

Mon Nov 03, 2008 7:06 pm

They arent needed for a stock 1600. It would be a waste of time. If you're getting blowby, use a thinner oil.

Bigger engines require the valve covers vented due to much more extreme pressures inside.

Mon Nov 03, 2008 7:10 pm

SkrapMetal wrote: They arent needed for a stock 1600. It would be a waste of time.

Mon Nov 03, 2008 7:12 pm

thanks fellas.. no.. I dont have any blowby or anything .. I was just pondering the idea

Tue May 17, 2016 11:42 am

Reviving an old post.

I have a 1641 DP that I am adding dual carbs to. These dual carbs are Kadrons that used to be on my Beetle's 1776 DP. The valve cover over #3 and #4 had a breather vent with a line to a breather box. I have seen plenty of motors with dual carbs that do not have this, and I understand it is more useful in bigger motors.

Should I vent my valve cover on this 1641DP?

Any advice is appreciated.

Tom

Tue May 17, 2016 12:50 pm

I'm guessing a 1641 is not enough increase in size to warrant a breather vent in the valve cover.

Tue May 17, 2016 1:16 pm

If you have worn rings you may need. Think of it like this 2% of a 1600cc is alot less air than 2% of 2276cc. What the stock can take, depends.

Tue May 17, 2016 1:24 pm

I was like you breather boxes, hoses, for just in case situations.

I had those fittings to a breather box and after a year realized I had very little if any blowby. I have a 2.0 914 T-4 in my bug and have been running a single hose from the crankcase stock location to one of my Duel 36 Dells, no problem. No holes in the valve covers, no extra hoses -----

Tue May 17, 2016 1:54 pm

I see no reason not to vent the case. but be sure those seal good and the inner holes are bigenough. and that you put them in the right place's

Wed May 18, 2016 7:29 am

Odd that the 3/4 side was the one vented. Seems conventional wisdom is if anything vent the 1/2 side.

Fri May 20, 2016 3:37 am

Yea mike,some people are Bassackwards :lol:
Hell ,I don't even vent my VC's ,2110cc in the bus :wink:

Fri May 20, 2016 3:53 am

The best place to vent any motor is at the highest point , if the case is vented correctly in my experience ther is no need for more venting ..

Fri May 20, 2016 11:01 am

I dont get the convential wizdom...both of my v/c's are vented with zero issues. and vented up high.

Fri May 20, 2016 9:06 pm

I stopped venting valve covers.

It's not the source of the crankcase pressure, the case is. Add better crankcase ventilation, and you can leave the valve covers alone.

Fri May 20, 2016 10:39 pm

Fattie wrote: a...are they worth a damn...
http://www2.cip1.com/ProductDetails.asp?ProductCode=ACC%2DC10%2D5652

nope. Not worth squat, not even as raw materials.
no barbs, holes too small, and valve covers don't have flat spots. So what did they get right?
The right thing to do is machine or buy a thinwall steel barb and weld it on. Unless you have aluminum covers, then you'd be more likely to go with pipe thread, or just tap the heqad in the OE breather location.
I don't think you need two, just one should be fine.
On a stock 1600? heck no, just don't remove the stock breather and replace it with crap like this.

Sat May 21, 2016 9:03 am

I machined barbs on a set, worked fine, also opened the id up some. but I like pipe threads better.....nylon ones at that.

Sat May 21, 2016 10:05 pm

Fattie wrote: thanks fellas.. no.. I dont have any blowby or anything .. I was just pondering the idea

You have to much time on your hands or sump'ting?

Sun May 22, 2016 11:00 am

http://www.cbperformance.com/ProductDetails.asp?ProductCode=1772
These are the best off the shelf one's I've found.

Sun May 22, 2016 9:38 pm

VW vented the rocker boxes on DJet fuel injected Type 4 engines. The difference is that they routed clean air from the air cleaner to the rocker boxes, pulled it thru the Pushrod tubes, and out the top of the crank case thru a one way valve. Fresh air entering the rocker boxes kept them very clean. Just something to consider. :wink:

Mon May 23, 2016 5:59 am

Vanapplebomb wrote: VW vented the rocker boxes on DJet fuel injected Type 4 engines. The difference is that they routed clean air from the air cleaner to the rocker boxes, pulled it thru the Pushrod tubes, and out the top of the crank case thru a one way valve. Fresh air entering the rocker boxes kept them very clean. Just something to consider. :wink:

That's a PCV system, different than just a breather system