What size exhaust are you running? We had low suction on our system when plumbed into open headers (had a gauge to meaure it) and noticed low to no suction at idle. Large exhaust would have less volume flowing in low flow circumstances (idle for instance) so it might be the problem. I'm thinking you are running 4 inch exhaust, but I sometimes don't think so well!
Yep yer memory's good. The RDT venturi is installed right where the down pipe steps up to 4 ".
I've gotta agree at low volume exhaust output at an idle is a disadvantage for the large piped exhaust systems to allow the RDT system to work properly. Anything over 1000 rpms with an open RDT system ( a T installed within the RDT tubing to the exhaust) there was enough air flow for the RDT system to work properly. Which is why I opted to test a closed system. So far it seems to be working good.
6 Nebraska IDIs said:
Alright guys, I am wanting to do this to my brown truck while I have everything apart and Im installing a new 4" exhaust at the same time so I really need to figure out what to do.
Should I just remove the CDR all together, and plumb the RDT straight from the valve cover to the exhaust? Or if you use the CDR does it not require a check valve?
I want to do this right, as Im pulling the engine and its going to have all new seals and such in it and I dont want to blow anything out.
I've completly bypassed the CDR all together. Using the Banks adapter on the timing cover is where I tied in the RDT system.
I'd be a little cautious about plumbing the RDT into the valve cover. What you might get at high rpms is an oil draw down effect that there may be enough vaccuum created by the RDT system to suck some of the oil out.
Granted this is only my opinion, from my view what I'd see is on the Banks adapter for my setup, there is a greater distance of "lift" where oil would have a greater challenge of getting into the system.
Whereas an RDT tied into the valve cover where then it would come up off the valve cover and take a 90 degree turn then head downward to the exhaust.
I could see a greater chance of oil making it into the RDT than just crankcase vapors.
Clear as mud yet?
What I can do is get a few pics taken and load them up for an example on my setup.
Cheaper Jeeper said:
I guess my big question is how is this going to reduce smoke at the tailpipe? Because some of the statements others have made about it certainly seem to imply that it will. Or did I misread those statements, and they are meant to say that the girls at the drive-through were complaining about "smoke" (actually oil vapor) from and RDT that WASN'T going into the exhaust...
The girls at the drive thru incident was when I had the RDT system open and a T installed into the tubuing between the engine and the exhaust. Yes there will be some vapor exiting thru the exhaust system pending on how hot your exhaust is and the length of the the exhaust system. Beings my system is installed on a dually crew cab, the vapors are greatly reduced in that situation. After a normal operating drive, I see very little vapor exiting the tailpipe.
Now there is another way which I'm still trying to perfect is a home brewed containment system that will scrub the crankcase vapors to the point that no liquid will enter into the exhaust stream. Then when the canister gets enough liquid scrubbed, I can drain it out periodically.
