(reground) cam went flat?

[XfireZ51]

Originally Posted by FU2

Attachment 446
Click :
http://www.youtube.com/watch?v=kNwbjcuQUv8#

FU,

You mean CAM NAZI!

Pete,

OK, OK. I'll buy you pizza Friday.

[Paul Workman]

Dom...

I think we just got sent to Ban Camp...by none other than the Ban Camp King hisself!

P.

[XfireZ51]

Originally Posted by Pete

Paul and Domonic are suspended from coming to my garage 1 year.

What you see in my garage stays in my garage.

No Gararge for you 1 year.

Pete

NNOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO!

[cuisinartvette]

Never seen a flow sheet on the LT5 heads before only heard one rough figure before. At some point this year Ill be making a fixture for one and flowing a stock one just to see, maybe some work will follow, see how things go.

[Tyler Townsley]

Originally Posted by Pete

WTF.

Paul why did your wifes cam wipe out?

Now for all the smart guys out there that know it all.

Answer me this.

Why only the new lifters went bad but my old 65k mile lifters are still good and i will be reusing them.

I've had my intake cams for over 2 years with no issues till lifter change.

Reason for changing lifters had a nosey one i had to hold 2k rpm for it to load up.

Two of the new lifters have started to show cracks the cam lobes look fine so basicly took out 3 out of 4 new lifters.

So please all you smart guys answer me the above question why they held up for 2 years but as soon as i put new lifters it breaks??



Pete

There is a difference between the 90-92 lifters and the 93+. Do not remember exactly what but I think the new ones are slightly higher and to use them in an earlier engine Geoff cut the valves down .001. You can use the older lifters in a later engine but using the later in a earlier engine may cause sealing problems.

Tyler

PS Acording to what I know about spring pressures the LT 5 should be ok without the additive. If you use Red Line it still has the older additive package.

Originally Posted by Tyler Townsley

There is a difference between the 90-92 lifters and the 93+. Do not remember exactly what but I think the new ones are slightly higher and to use them in an earlier engine Geoff cut the valves down .001. You can use the older lifters in a later engine but using the later in a earlier engine may cause sealing problems.

Tyler

Lifters are the same, the valve length is longer in the 93+ motors.

[Pete]

Originally Posted by Jeffvette

Lifters are the same, the valve length is longer in the 93+ motors.

[Paul Workman]

Originally Posted by Tyler Townsley

... If you use Red Line it still has the older additive package.

Really? Good to know. Wouldja happen to know the API rating?? Rotella T has the good stuff in it as well, but it is actually a Diesel motor oil, and has (I'm told) more detergent in it - perhaps more than necessary to be used in a gas engine, as a rule. Having said that, Comp Cams listed the Rotella as one of the oils recommended as a break-in lube for a new flat tappet cam (along with their break-in additive).

Dayam! I'm not a chemist, and lubrication is a complicated topic. Make a mistake, and it becomes $$$ very quickly! It is hard to pick out the truth from all the hype the oil companies use without a good understanding of the chemistry involved. So, for now I'll go with Marc's recommendation for the Z (AMO 10W-40). The science he used to make that determination makes far more sense that trying to sift thru the oil BS w/o the right tools to assess the distinctions between them. I don't know 'bout you, but of all the products I buy, I'm hard pressed to think of any product that is surrounded with more advertising hype and pure BS than automotive oils...

Whatever oil Marc H. says to use, is good as gold for me.

P.

[Zr1 Destroyer]

http://www.joegibbsracingoil.com/


^^^Goooood stuff! I gave the rest of my grape juice to my neighbor.

[flyin ryan]

I don't know if i mentioned it on here before or not, but i went to a seminar last Sept. put on by Joe Gibbs Driven oil & hosted by Lake Speed Jr. was very, very good. even before the seminar we were using J.G. BR/XP-4 (same thing). only thing we could get some flat tappet stuff to live on, during break in. helps not only cams but ring seal a bunch too. i'm not getting into great detail...don't have time, sorry. quickly...as for API ratings & whatnot, since Joe Gibbs oil is not on the retail market, (never will be acording to them), Wal-Mart etc. they don't have to adhere to government standards (for emisions, detergents etc.) so they can build the oil how they want too. as for Rottella T. yes it's diesel oil but what it has is more Zinc & Moly, that's the key to that stuff. the government ratings for diesel oil changed a few years ago & i think it's set to change again in 2010, getting worse each time. by the next change, 2010, there won't be really any benifits to using it any more. could go on & on & on...gotta go. hope this helps some of you...a little.