Used lifter condition (CB Lightweight Racing)

Vee Dub Nut

Looking for some opinions on what these lifters look like..

They are CB lightweight racing lifters pulled from my 2276. I used these on a CB/Eagle 2288 (K8) cam with Tims STGII heads w/ dual springs & CB 1.4 rockers. Engine was broke in using provided cam lube (cam shield) and Brad Penn oil. Engine has only been run on Brad Penn or Valvoline VR-1 (also high zddp). Cam looks decent (as far as I can tell), but the lifters have this unusual pattern on them. Thoughts?

In the light..
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At a shadowed angle to get higher contrast. This makes them look worse then they really are.
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Couple of close ups
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I'm not well versed on what to expect from used lifters, but this doesn't look right to me. Its clearly visible, but you can feel NOTHING when touching the lifter surface.

I probably have somewhere around 6-8k miles on these tops. I'm assuming this is not normal. What happened? Can they be sent to SLR and reground and used again? Or is this normal?
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Fightin' Texas Aggie Class of 2006

67 Beetle, Megasquirt!
00 GTI VR6

modok · Posted: Sat Apr 14, 2012 3:36 pm Post subject:

It is strange looking, but that in itself is not any indication of trouble.
When the metal has the correct balance of toughness/hardness you can get this type of thing going on, called micropitting. the surface is wavy, and the low spots are filled in with oxide(what the ZDDP helps to do), the oxide reflects light different so you can see the waves but not feel them

The question is.... how much it is actually worn? You'd have to measure the crown to know, or at hold it up to the light and roll a small straightedge across, looking at he light coming through the gap, you can kinda see if they are going flat

Since some look different than others, I wonder how good the lifter bores are aligned, were they sleeved?

Vee Dub Nut · Posted: Sat Apr 14, 2012 3:42 pm Post subject:

They feel smooth as can be, and no evidence of problems on valve adjustments. I'm just in the engine for other reasons and thought this looked odd. Good to know that it may not necessarily mean anything.

The case is an Autolina AL bubble top case, no sleeves...
_________________
Fightin' Texas Aggie Class of 2006

67 Beetle, Megasquirt!
00 GTI VR6

modok · Posted: Sat Apr 14, 2012 3:48 pm Post subject:

yeah, they should be alright.
So....... how does that engine run anyway? you like it?

Vee Dub Nut · Posted: Sat Apr 14, 2012 3:53 pm Post subject:

I loved the cam when the engine was N/A with 48 IDFs.. but after converting back over to blow through EFI (single throttle body), its really too big.

Idle on the turbo/efi system is very lopey and low speed operation is not as smooth as I want for a street car. I pulled the engine for clutch issues (post around here somewhere), and thought I'd go ahead and do a cam swap while I'm in it to something more streetable.

If I had dual IDF style throttle bodies, it would probably still be a good fit, but with 42* of overlap at TDC, reversion in the common plenum is rough.
_________________
Fightin' Texas Aggie Class of 2006

67 Beetle, Megasquirt!
00 GTI VR6

modok · Posted: Sat Apr 14, 2012 4:00 pm Post subject:

oh, cool, well if your switching cams then it would be good to get em' reground.
I know CB does have a lifter grindin machine, tho I do not know if they offer it as a service.
will you be getting a cam with a WIDER lobe center perhaps?

Vee Dub Nut · Posted: Sat Apr 14, 2012 4:03 pm Post subject:

Thought I'd give SLR a call and see what they charge for service.

But yes, absolutely looking for a wider LSA. Getting down in the low to mid 20's on overlap is what I'm shooting for.
_________________
Fightin' Texas Aggie Class of 2006

67 Beetle, Megasquirt!
00 GTI VR6

modok · Posted: Sat Apr 14, 2012 4:05 pm Post subject:

Web also will regrind
86a on 114? Very Happy

silver billy · Posted: Tue Apr 17, 2012 2:19 am Post subject:

New cam = New lifters Replace them, it is cheap insurance. Also, may I suggest getting your case checked out; there is a lot of variation in the wear on lifters that ride on the same lobe. uneven spring pressure perhaps? lifter bore out of tolerance? That kind of wear seems excessive given your mileage.

Vee Dub Nut · Posted: Tue Apr 17, 2012 5:05 am Post subject:

modok · Posted: Tue Apr 17, 2012 11:25 am Post subject:

If you use in another engine case I'd regrind them
The location of the lifter bores can vary so it may not line up the same

Vee Dub Nut · Posted: Tue Apr 17, 2012 11:26 am Post subject:

Thanks.. I'm planning on contacting SLR to have them reground for good measure.
_________________
Fightin' Texas Aggie Class of 2006

67 Beetle, Megasquirt!
00 GTI VR6

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