Can I run something else off of the vacuum pump and maintain the same vacuum on the WG?


I'm wondering if I could pull enough vacuum on a condenser for CDRV replacement and turbo opperation. RamAir may force a change.

I don't think the pump will pull nearly that volume.


Why not route the CDR to your condenser and put a breather on it to relieve pressure?

In that case I'll put the condenser in the backend and tap the exhaust for the vacuum, like Billman did but further back maybe.

even better :)

Did anyone ever establish if vacuum was achieved by tapping the exhaust? Or am I gettin' all messed up in my memory of posts?

I don't know if he ever pulled a vacuum on his setup.


What about a 12v vacuum pump on the condensor? would that pull a vacuum on the crankcase?

I did get vacuum on the downpipe. Very little. 1/2" to maybe 1".


I also saw pressure in the crankcase. Maxed out at 2psi.


Electric Vacuum Pumps don't pull too much if I recall.

Billman,


I would imagine that was at higher exhaust volumes that you saw vacuum.


I said this before but an afterburner would do the job. It could pull a vaccum as it burns the crank vapors. Similiar to a turbojet. All you require is compression in (the exhaust) a fuel (cdr vapors) a turbojet and you could throw a flame out the back.

QM,


AB's don't pull vacuum, they respond to increased push;


AB is actually a secondary fuel nozzle/burner ring, & air from fan bypass air, kind of hard to explain in a post, basically turbo fan engines either of hi bypass like in commercial aircraft, or low bypass like in military aircraft with AB capability, the jet drives a fan (high efficiency propeller) which provides thrust to the aircraft very little thrust from the jet itself, in low bypass military jet the air from the fan is ducted around the outside of the engine, some air of the fan is also sent to jet intake, sort or "supercharging" which gives it a little more oomph.


The majority of the fan discharge is ducted aft, and mixes with the low pressure exhaust (exhaust is low pressure "relative term" as it has been reduced to drive the fans turbine) then through an iris(nozzle) that is closed for "military power" when AB is active the iris goes full open and AB fuel nozzle and ignitors activated which get the max thrust, comes at a huge cost fuel consumption in AB nearly 4x normal which is why AB used for short bursts, naval airfraft using AB for take-off from carriers if possible in-flight refuel as soon as they can for max in flight time. Edited by: Turbine Doc

TD,


I was thinking of one of these.


http://www.dieselplace.com/forum/uploads/FB2_sm2ndturbo.jpg


this is the parts, probably a dodge turbo.


http://www.dieselplace.com/forum/uploads/37B_smnight1.jpg


and this is a turbo-jet spinning at 100,000 rpm


www.junkyardjet.com/index.html (http://www.junkyardjet.com/index.html) Edited by: quantum mechanic

All I can say about the project you linked to is that it is seriously dangerous, make sure your life Ins is paid up and has an acts of stupidity clause, yeah it works, a very primitive jet, but a toy with little application use, a whole lot of info missing don't try it at home kids. It is a turbo jet pure thrust, definately not a AB jet probably as inefficient as a AB jet in AB mode.