The MDS lifter will not tollerate over .500 valve lift.

You can get a flash from B&G to delete MDS. Or ground out the selenoid and replace it with the block plug from the 03-05 truck engines

Where is the selenoid located. Block plug?

Under the intake manifold in the cam valley.

Stop the Madness!
 

I can answer most all of this...........

#1. No, the 6.1 cam does not require tuning......its a plug-n-play
#2. Yes, they are cheap..........I can get you a used one even cheaper
#3. The MDS motors will allow MORE than .500 lift ie. the Comp XFI260
#4. You can "ground out the MDS" but it will throw a CEL
#5. Call Dave @ B&G and ask him about a computer flash
#6. OR run the Comp XFI260 and not tune it and still have MDS

If you have any questions I'd be happy to help.

What cam options are there for the 6.1, with the available tuning options?

Steve and I are not supporting vendors YET, but are talking about it.

Comp offers 3 and so does Crane.

Steve and I offer a few...........

Tuning for the LX's (cars) seems to be monopolized by B&G, but there are rumors of stuff coming out this first quarter. The biggest tuning options we need are:

- raised idle rpm
- adj timing both static and tip in
- fine adj of the MAP
- depletion of the MDS mode from the appropriate vehicals

I think I was misunderstood. The MDS lifter performs poorly over .500 lift and 5000 rpm. Will it run fine lower in the rpm range, yes. But why do it if you will have issues.

will run fine at rpm limit. i dont know where that info is coming from but its been proven time and time again. the theory was at one point max lift would be .518. that like i said was proven wrong and the comp xfi 260 cam runs fine. even with the stock spring. it does run better with the comp 918 tho.

i have some grings for the 6.1 and the 5.7. but im not comfortable selling here as we are not vendors. maybe soon.

steve

Ok so it runs better with the comp spring. That tells me the stock spring is overloaded with the mds/heavier lifter. So why would you risk running the bigger cams with stock springs or mds lifters.

Denny

not saying thats how i would run mine or yours. just saying that it has been done. i agree the lifter itself needs to be removed and replaced. but if your not ready to yank the head, then just install the comp spring and be done.

im all for lightweight valvetrain stuff. the mds lifter is a touch heavier than the other lifter, but not that much.

steve-o