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Old 10-15-2008, 03:44 PM
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L-88 Bumpstick Help

Done a lot of research on the L88 solid cam 427.
you would think it has one set of specs. I have found
3 different sets of grind, duration, lift and lobe sep numbers
on this thing.
Because it has that fast chop idle the intake/exhaust vary in degree
and the lift varies in degree as well. What I have found most is the
264/269 dur, .560/.580 lift.
Does anyone really know the truth on this?? please. The oldie GM part
number was/is 3925535 ?
I was leaning towards the Isky 396245, Z-45 grind, but it wouldn't give me
the L-88 427, solid Yenko type beefy/throat sound/idle. you guys know that
old power sound.

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Old 10-15-2008, 04:40 PM
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F-BIRD'88, L-88 Cam Advice

Of course I am going to drive it. I just like the sound of that
L-88 solid cam.


I am not sure if this will work, but cut/paste the link
above tolisten to the BBC sound I want.
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Old 10-15-2008, 04:45 PM
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Comp grinds a hydraulic re-pop of the LS6...
Hyd. 1800 to 6200 Part number 11-670-4, Grind number N+LS6, 276*/283*, 229*/236*, 0.530"/0.524", 112 LSA.

Back in the day, those nasty factory cams were ground with quite a lot of ramp, 65 to 70 degrees difference between 0.006" and 0.050" lift figures. Today's grinds are much quicker. You'll note that the difference on the Z45 is only 34 degrees. That's only 17 degrees on each side of the lobe, opening and closing, assuming a symetrical grind on the lobes. If using that cam, pay strict attention to using all of the supporting parts such as the recommended valve springs. Break the cam in with some worn-out stock springs, then change them out for the recommended Isky units. Use plenty of ZDDP in the oil.

I would think it is possible to contact your favorite cam grinder and have them grind an L88 cam to the same specs as the factory grind. I'd bet they still have the masters.

F-Bird posted while I was still typing and has given some excellent information.
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Old 10-15-2008, 05:14 PM
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F-BIRD'88&Techinspector, LS6, L88 stick Questions

that comp# 12-250-3 is for a SBC not BBC

Which comp cam would be better for all out grunt
out of the hole in your seat and sound the nastiest?
the 11-670-4 or the 11-551-5 Comp???


Liston to this again please..everyone..this is a nice sounding
ride and performs well. A friend has one (clone) and it is in your
seat power.
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