Delivery valves
Delivery valves
I talked to my shop teacher today and he said that he would be willing to help my with the use of a lather to try to get some precision in removing a part of the collar. I was thinking about reducing the height of it by half. Others totally removed it buy he says that we can get to .0001" so I guess its worth a shot. Is it correct to assume that since I'm only removing half, it should be the bottom half of the collar?
The yellow section is the collar right? I should remove the part of the collar that is closest to the cone?
no, basically the collar has to be narrow and should be located cole to the cone. Modifying means cutting away a part of the collar on the lower part (in your photo).
But keep in mind that the plunger (the parts in your photo) is matched to the barrel. Do not mix up.
Tom
So I finally got around to bringing some valves down to school and taking them to my professor. He says we try grinding the collar. He wants to grind down one of the carbide grooving tips to the correct width so that we can just take one pass. I said lets go for it and try to reduce the collar "height" by half.
While looking at the valve I had an idea. What if you took the valve to a vertical mill and reduced the flute thickness? Wouldn't this effectively allow more fuel the be in the "chamber" and eventually allow more to reach the cylinder per stroke/injection? Any thoughts?
(10-27-2010, 11:24 PM)DrewGerhan While looking at the valve I had an idea. What if you took the valve to a vertical mill and reduced the flute thickness? Wouldn't this effectively allow more fuel the be in the "chamber" and eventually allow more to reach the cylinder per stroke/injection? Any thoughts?
(10-27-2010, 11:24 PM)DrewGerhan While looking at the valve I had an idea. What if you took the valve to a vertical mill and reduced the flute thickness? Wouldn't this effectively allow more fuel the be in the "chamber" and eventually allow more to reach the cylinder per stroke/injection? Any thoughts?
(10-30-2010, 12:36 PM)Olivier I cannot see any picture between the 5mm(I think) element of a 606 turbo and the 7mm.
Where is the extra 2 mm and why this is not a "plug and play" as this is only the plunger that is changed?
Cheers.
Olivier
(10-30-2010, 12:36 PM)Olivier I cannot see any picture between the 5mm(I think) element of a 606 turbo and the 7mm.
Where is the extra 2 mm and why this is not a "plug and play" as this is only the plunger that is changed?
Cheers.
Olivier
(10-30-2010, 02:35 PM)Olivier Oh. Thank you Alastair. Are the plunger the "large washer" style then under the DV?
About the picture, are those the elements? As I am wondering why the 7mm need to be "adjusted" by a pro shop while replacing them as it look like a swap job.
Thanks.
(10-30-2010, 02:35 PM)Olivier Oh. Thank you Alastair. Are the plunger the "large washer" style then under the DV?
About the picture, are those the elements? As I am wondering why the 7mm need to be "adjusted" by a pro shop while replacing them as it look like a swap job.
Thanks.
(11-05-2010, 08:16 AM)Olivier What is this banned for on your name?
(11-05-2010, 08:16 AM)Olivier What is this banned for on your name?
Figured I would dredge up this old thread with my experience.
I took a set and 0.010 off of the collar on all of them. I had them all within 0.0005 of each other (via micrometers). No burrs on the edges. I put them in and the engine immediately tried to run away, I adjusted the vertical throttle stop up a total of 4 turns to get it to idle properly.
Things I had:
God awful idle
Very touchy throttle response
Power increase on the level of "holy shit"
High EGTs but nothing above 1200
Things I did not have:
Smoke at idle
Excessive smoke while driving
I took them out after about 30 min of driving around. Didn't bother with a 0-60 because of the small turbo choking anything above 3500 rpm. It was interesting to me that even having them all very very close size wise still doesn't clean up the idle at all. If it would have idled properly I would have left them in but I couldn't stand it any longer.
(01-23-2012, 06:39 PM)led-panzer Figured I would dredge up this old thread with my experience.
I took a set and 0.010 off of the collar on all of them. I had them all within 0.0005 of each other (via micrometers). No burrs on the edges. I put them in and the engine immediately tried to run away, I adjusted the vertical throttle stop up a total of 4 turns to get it to idle properly.
Things I had:
God awful idle
Very touchy throttle response
Power increase on the level of "holy shit"
High EGTs but nothing above 1200
Things I did not have:
Smoke at idle
Excessive smoke while driving
I took them out after about 30 min of driving around. Didn't bother with a 0-60 because of the small turbo choking anything above 3500 rpm. It was interesting to me that even having them all very very close size wise still doesn't clean up the idle at all. If it would have idled properly I would have left them in but I couldn't stand it any longer.
(01-23-2012, 06:39 PM)led-panzer Figured I would dredge up this old thread with my experience.
I took a set and 0.010 off of the collar on all of them. I had them all within 0.0005 of each other (via micrometers). No burrs on the edges. I put them in and the engine immediately tried to run away, I adjusted the vertical throttle stop up a total of 4 turns to get it to idle properly.
Things I had:
God awful idle
Very touchy throttle response
Power increase on the level of "holy shit"
High EGTs but nothing above 1200
Things I did not have:
Smoke at idle
Excessive smoke while driving
I took them out after about 30 min of driving around. Didn't bother with a 0-60 because of the small turbo choking anything above 3500 rpm. It was interesting to me that even having them all very very close size wise still doesn't clean up the idle at all. If it would have idled properly I would have left them in but I couldn't stand it any longer.
The timing may very well play a roll. Could also explain why I didn't have that nasty smoke. I've actually never checked it so who knows where its at. Last year I was too busy with school and work to get anything done but I'm getting back into it.
I'm done playing with these though, I've started a piggy bank and ill be sending my M pump to Europe in a couple months.
I have done some experiment with this and have a answer.
It dont work on these kind of pumps / engines.
On the pumps to the pullingengine that I do, it usually works out well, but then we have alfa around 35-45 BTDC, 800-1100cc of fuel ( OM606 55-60cc) 7-12 bar of boost, Waterinjection etc etc.
Still the engine is "hunting" & smoking on low idle.
If you need moore fuel there is only one option. Bigger plungers.
(01-24-2012, 02:48 AM)dieselmeken If you need moore fuel there is only one option. Bigger plungers.
(01-24-2012, 02:48 AM)dieselmeken If you need moore fuel there is only one option. Bigger plungers.