VP Dynamic Timing Vs. Advancing

[01CumminsSport]

no there a different size and iirc the pupm shaft is slightly tapered also, but you could just machine a spacer that was keyed in there to make up the difference

 

[Smokem]

are the cam and VP gears the same size and bore?

Is this a serious question?

 

[coon smile]

I think he meant the same size as the 12v....

 

[Smokem]

I think he meant the same size as the 12v....

I would have the same response.

 

[Rollin Coal]

arent you custom machining your own vp pump?

the injection pumps shaft is tapered and the cams arent.

 

[kjpcummins]

You can use the offset keys for either the cam gear or pump gear, ~ 24-25° is the limit with an unmodified piston/case.

I was talking about this last night and this answered my question and exactly what i needed to know. Thanks

 

[Rollin Coal]

I was talking about this last night and this answered my question and exactly what i needed to know. Thanks

i had myself convinced it was 2.5*, but the more i think about it the more 10* makes sense...... oke:

 

[coon smile]

Something tells me he knew the answer.

 

[Smokem]

One tooth on the cam is 5°, and one tooth on the pump gear is 5°.

 

[Rollin Coal]

One tooth on the cam is 5°, and one tooth on the pump gear is 5°.

yep, we got that. now does that translate to 2.5* or 10* of injection timing?

 

[Smokem]

yep, we got that.

Apparently not. How many times do I have to say 5°?

 

[Rollin Coal]

Apparently not. How many times do I have to say 5°?

the 2:1 ratio of the crank doesnt effect it?

 

[Smokem]

10° of crank rotation equals 5° of injection timing. If you move the pump gear 5°, it advances/retards the timing 5°, if you move the cam gear 5°, it advances/retards the centerline 5°.

 

[Mike D]

Dude, 5 degrees of advance is 5 degrees.

 

[Rollin Coal]

10° of crank rotation equals 5° of injection timing. If you move the pump gear 5°, it advances/retards the timing 5°, if you move the cam gear 5°, it advances/retards the centerline 5°.

gotcha. thanks.

 

[Phily 911]

No more tech talk. Lets get down to brass tax: How do I get my truck to smoke?

 

[explosives87]

No more tech talk. Lets get down to brass tax: How do I get my truck to smoke?

wire in a smoke switch. :hehe:

 

[TURBOLVR]

Is this a serious question?

it was a dumb question, but did you look @ the link? A pair of these and a split timing cover would make dial-in on a dyno pretty easy with no chance of dropping a key.

 

[Phily 911]

wire in a smoke switch. :hehe:

yea haw!

 

[sstockton]

it was a dumb question, but did you look @ the link? A pair of these and a split timing cover would make dial-in on a dyno pretty easy with no chance of dropping a key.

Those things are cool. But pretty spendy. It would be nice though. Especially for the Cam gear. The VP gear isn't so bad with the cover off. Yanking the cam just to switch the Key kinda sucks. I haven't tried it, but I don't think my bolt on cam gear is just going to pop off easily though.
Sean