does any one know the stock cam specs for a lly/lbz cam?
lift,duraration,lobe sep on the intake and exhaust
lift,duraration,lobe sep on the intake and exhaust
stock cam specs
- Thread starter dirttymaxx
- Start date
Henry and others have posted a lot of GM tech specs on the various Dmax engines.
We have a forum that's nothing but specs and TSB's. Let me look.
We have a forum that's nothing but specs and TSB's. Let me look.
Here's the forum: https://www.duramaxdiesels.com/forum/forums/gm-specs.97/
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Here's the thread:
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Good thread... but I didn't see any duration specs in that post?
Purely just curious myself... not important.
Purely just curious myself... not important.
Guy Tripp at SoCal Diesel might know. There also might be a thread somewhere that says the duration numbers.
Problem with diesel cams is they are secretive with the numbers, unlike the gas industry.
Problem with diesel cams is they are secretive with the numbers, unlike the gas industry.
yeah yeah yeah im just lazy!! been doing some thinkin the last few weeks,im thinking about a stock lift big duraration cam.
Actually the easiest way to measure a cam is with a dial indicator and degree wheel while it's still in the block. Doing it on a bench is very difficult without special tools.
in the block is one thing,,, while said block is still in truck is a pita (IMO) lol. guess I shouldn't have assumed it was. I have a simple little bench top jig I lay the cams in. Not bad really I just dont like climbing into and engine bay to do it.
If you are not compensating for the lifter geometry (not much error with roller lifters), the numbers will have a little error in them, indicating a shorter duration than really exists.
If you have a LONG travel indicator, you do it without the heads on and a lifter in the bore. Set indicator dial to 0.000" with the lobe 180° away from the lifter. You are just looking for the first movement of the indicator, jot down the degree wheel number (bolt a piece of wire on the block to use as a pointer), then spin til it hits the same number (which should stay steady). If it doesn't come back to the same indicator 0.000", reposition indicator and try again. Get the same # 3 times, and you have your "zero lash, zero lift" number.
In practical reality, there are mfr variations, so allow the indicator to get to say ±.002" to be considered zero.
In practical reality, there are mfr variations, so allow the indicator to get to say ±.002" to be considered zero.
DMax cams
Can someone post the stock specs for an LBZ cam? Lift, duration, duration @ .050 (or whatever), and lobe center. Where is the cam timing set on the stock LBZ (Intake CL relative to TDC)? This is my 3rd DMax, but I'm still a newb to the land of positive pressure. My kneejerk instinct says...
www.duramaxdiesels.com
Look in here. 176 deg at .050" lift, 108 LSA?
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