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+--- Thread: Whats up with Cut Delivery Valves? (/showthread.php?tid=890)
Whats up with Cut Delivery Valves? - Ian White - 11-30-2009
What have you guys noticed? More power/ smoke? Higher EGT's? What exactly does cutting the DV's entail?I have just completed my engine swap in my 81 300SD. It now houses a 1984 model year 617.952. The alda has never been touched (evidence of this being the metal band around plastic cap over adj nut). I want to remove it soon because it isn't near as peppy as my former benz engine (stock with ALDA devirginized 1981 617.951). I need to check my boost on this .952 and report back. Basically, I am looking for good performance while trying not to sacrifice too much mileage-I know people in Hell want icewater .
RE: Whats up with Cut Delivery Valves? - ForcedInduction - 11-30-2009
The DV isn't a restriction to flow on the M and MW pump. Cutting the collar results in a very unstable idle, lots of smoke and extremely quick increasing EGTs. It had good power but the EGTs made the power unusable.
http://www.youtube.com/watch?v=HUUxhb4Rd9w
RE: Whats up with Cut Delivery Valves? - Ian White - 11-30-2009
(11-30-2009, 01:15 AM)ForcedInduction The DV isn't a restriction to flow on the M and MW pump. Cutting the collar results in a very unstable idle, lots of smoke and extremely quick increasing EGTs. It had good power but the EGTs made the power unusable.
http://www.youtube.com/watch?v=HUUxhb4Rd9w
Cutting the collar? I thought to 'cut the dv's' one would remove them and have them Blanchard ground...
RE: Whats up with Cut Delivery Valves? - ForcedInduction - 11-30-2009
No, just the collar profile.
RE: Whats up with Cut Delivery Valves? - Ian White - 11-30-2009
(11-30-2009, 01:33 AM)ForcedInduction No, just the collar profile.
So it is just removing some material from the top of the dv to the collar? Or cutting the diameter of the collar? My picture will explain my question...
How are these DV's removed from the IP? Thread link / picture?
RE: Whats up with Cut Delivery Valves? - ForcedInduction - 11-30-2009
Yes, Just cutting the collar. The height difference is an optical illusion of the camera.
RE: Whats up with Cut Delivery Valves? - Ian White - 11-30-2009
(11-30-2009, 03:39 AM)ForcedInduction Yes, Just cutting the collar. The height difference is an optical illusion of the camera.
I assume the are accessed underneath the inj lines on the IP and the 15 mm nuts? Please excuse my uninformedness
RE: Whats up with Cut Delivery Valves? - ForcedInduction - 11-30-2009
Yes. Remove the lines, remove the 15mm nuts and they will be directly under. They will need a new copper crush washer as well.
RE: Whats up with Cut Delivery Valves? - Ian White - 11-30-2009
Okay, looks fairly striaghtforeward. Did you turn yours yourself or did you have someone do it? I am wondering how much to turn off the body...
RE: Whats up with Cut Delivery Valves? - ForcedInduction - 11-30-2009
Yes, I did them myself using a crude air drill/lathe and a dremel.
RE: Whats up with Cut Delivery Valves? - DrewGerhan - 11-30-2009
What about cutting a "channel" in the collar? Would that in theory allow more fuel, but not as much as totally cutting them? Maybe better idle results?
RE: Whats up with Cut Delivery Valves? - ForcedInduction - 11-30-2009
I don't know. Give it a try and let us know!
RE: Whats up with Cut Delivery Valves? - DrewGerhan - 11-30-2009
The DVs from the P7100 shown above show that on the brass looking one, the collar is still there but just "thinner". This would allow more fuel and still have a collar to reduced the risk of double injection.
Thats what I could come up with the collar does from reading other threads.
RE: Whats up with Cut Delivery Valves? - E300TSC - 11-30-2009
Here's a picture of my modified DV:
![[Image: Pb230006.jpg]](http://i3.photobucket.com/albums/y71/kartek/Mercedes/Pb230006.jpg)
Unfortunately, I don't have a stock one to compare it to...
RE: Whats up with Cut Delivery Valves? - DrewGerhan - 11-30-2009
I take it from your user name, that is from a 606?
RE: Whats up with Cut Delivery Valves? - E300TSC - 11-30-2009
Yeah, sorry, I should put my car in my sig...
RE: Whats up with Cut Delivery Valves? - Ian White - 11-30-2009
(11-30-2009, 06:11 PM)DrewGerhan What about cutting a "channel" in the collar? Would that in theory allow more fuel, but not as much as totally cutting them? Maybe better idle results?
Is this also known as slotting?
RE: Whats up with Cut Delivery Valves? - DrewGerhan - 11-30-2009
I couldn't tell ya. I feel that a Cummins forum might be helpful right now.
RE: Whats up with Cut Delivery Valves? - Ian White - 12-01-2009
I don't know what to do; I want more power, but I would like to sacrifice as little fuel economy as I could...What mods should I do?
RE: Whats up with Cut Delivery Valves? - E300TSC - 12-01-2009
I'd be looking into a set of Tomnik's "Holly" 6.5mm elements and a VNT for the most bang for the buck.
I'm getting some 7.5's from him and it would probably be a good time to get some other things right now to save on shipping. I could send them to you once I got them here in the States.
RE: Whats up with Cut Delivery Valves? - Ian White - 12-01-2009
Tell me more about 6.5mm elements please...I am uninformed.
RE: Whats up with Cut Delivery Valves? - E300TSC - 12-01-2009
http://www.superturbodiesel.com/std/interest-in-mw65-holly-elements-t-691.html
RE: Whats up with Cut Delivery Valves? - Ian White - 12-02-2009
(11-30-2009, 09:28 PM)E300TSC Here's a picture of my modified DV:
Unfortunately, I don't have a stock one to compare it to...
Are you still using your cut delivery valves in your OM606? Or did the bad idle get to you
...
RE: Whats up with Cut Delivery Valves? - E300TSC - 12-02-2009
Ian, I'm afraid I haven't had time to put them in yet...
RE: Whats up with Cut Delivery Valves? - DervTuning - 12-02-2009
Indeed, larger diameter elements are the way to go for more fuel with proper delivery, as well as being very cost effective (for more power).
(12-02-2009, 08:03 AM)E300TSC Ian, I'm afraid I haven't had time to put them in yet...
Don't worry, we will soon change that for you
RE: Whats up with Cut Delivery Valves? - Ian White - 12-02-2009
(12-02-2009, 06:45 PM)DervTuning Indeed, larger diameter elements are the way to go for more fuel with proper delivery, as well as being very cost effective (for more power).
(12-02-2009, 08:03 AM)E300TSC Ian, I'm afraid I haven't had time to put them in yet...
Don't worry, we will soon change that for you
What are you getting at when you say you will change parameters of my quest for power?
RE: Whats up with Cut Delivery Valves? - HoleshotHolset - 12-07-2009
(11-30-2009, 01:15 AM)ForcedInduction It had good power but the EGTs made the power unusable.
What were/are you running for a turbo?
Folks around here (short of the Finns) aren't known for running 'big' turbos...
On a OM617/OM606, anything smaller than a Holset HX35 is little, IMHO.
Beers,
Matt
RE: Whats up with Cut Delivery Valves? - ForcedInduction - 12-07-2009
That was with the VNT.
RE: Whats up with Cut Delivery Valves? - HoleshotHolset - 12-08-2009
(12-07-2009, 09:06 PM)ForcedInduction That was with the VNT.
OK. It takes a lot of flow/boost to burn clean. Was there a haze of gray or a cloud of black?
Beers,
Matt
RE: Whats up with Cut Delivery Valves? - ForcedInduction - 12-08-2009
It was thick gray, not black.
RE: Whats up with Cut Delivery Valves? - HoleshotHolset - 12-21-2009
(12-08-2009, 02:51 PM)ForcedInduction It was thick gray, not black.
That's not exactly fogging for skeeters level of overfueling - I bet with a little more boost/flow she'd clean right up. EGT's pre-turbo were about 1300° after a hard run...?
Beers,
Matt
RE: Whats up with Cut Delivery Valves? - Ian White - 12-28-2009
Would grafting a hx40 clear up the extra fuel?
RE: Whats up with Cut Delivery Valves? - ForcedInduction - 12-28-2009
For about 500rpm with it spools up at 4000rpm!
RE: Whats up with Cut Delivery Valves? - HoleshotHolset - 12-28-2009
(12-28-2009, 10:44 AM)ForcedInduction For about 500rpm with it spools up at 4000rpm!
Yeah - HX40's are lag pigs. Even on 5.9L Cummins engines. There are plenty of other options out there that will flow more and spool faster. Industrial Injection makes some very nice hybrid turbos - spendy, though.
I was VERY impressed with the ball bearing Garrett (GT37R ?) one friend of mine had on his Cummins ISB. The thing spooled nearly instantly and the EGT's stayed cool with a LOT of fuel even though he had a nasty crack in his intercooler. Again, a spendy bugger - but they seem to be very, very durable.