LU-142A vs LU-148

[richboyd]

Hi all.

Does anyone have a Pertronix/Aldon LU-142A fitted (and working) in
their mechanical-advance distributor (like a 40953)?

Pertronix catalogs (now) show LU-148 as the "correct" item for
mechanical dizzy and relegate the LU-142A to the vacuum units (like
the 41225). Older catalogs showed the LU-142A as the solution for
both. My question: does your use of an LU-142A in your mechanical
advance distributor present any issues? Especially with the 40953.

I called the Pertronix folks and asked about the difference between
the two (LU-142A vs LU-148). No satisfaction. A bunch of vague
answers. When I pressed the tech for a distinction, it came down to
"the phasing is different between the two." I couldn't get beyond
this answer. Phasing? Huh? Is this nonsense, or a real issue?

I can understand a difference in mounting plates, although the
LU-142A seems to fit both distributor types just fine (I have both
types and have tried the mounting plates in both - no problem). I
want to know if the LU-142A will work fine, or is a marginal
application, in a mechanical distributor.

Phasing? Can't you just turn the distributor in its clamp to get the
"phasing" correct? Or is the rotor to cap orientation an issue? I
seem to remember that Keith was grinding away part of his dizzy cap
to look at just this issue. Keith, care to wade-in with some knowledge?

Bottom line: I have an LU-142A. Can I use it in a 40953 without
issue? Or should I buy an LU-148 (just to be safe)? Unfortunately,
the best of the archives seem to be my own "expert" opinion. I don't
trust myself. Anyone else willing to offer their own experience? Please.

Rich Boyd

[Elan45]

Rich,

I'm not sure which unit I have in the mechanical advance dizzy in my
FJr Lotus. I can't understand what difference there would be, since both
sistributors used the same Lucas points. I'll try to look at the old box
the Pertronics cam in to see which it is, maybe tonite. I have a spare
set of points in the box, just in case.

Roger



Does anyone have a Pertronix/Aldon LU-142A fitted (and working) in
their mechanical-advance distributor (like a 40953)?

Pertronix catalogs (now) show LU-148 as the "correct" item for
mechanical dizzy and relegate the LU-142A to the vacuum units (like
the 41225). Older catalogs showed the LU-142A as the solution for
both. My question: does your use of an LU-142A in your mechanical
advance distributor present any issues? Especially with the 40953.

I called the Pertronix folks and asked about the difference between
the two (LU-142A vs LU-148). No satisfaction. A bunch of vague
answers. When I pressed the tech for a distinction, it came down to
"the phasing is different between the two." I couldn't get beyond
this answer. Phasing? Huh? Is this nonsense, or a real issue?

I can understand a difference in mounting plates, although the
LU-142A seems to fit both distributor types just fine (I have both
types and have tried the mounting plates in both - no problem). I
want to know if the LU-142A will work fine, or is a marginal
application, in a mechanical distributor.

Phasing? Can't you just turn the distributor in its clamp to get the
"phasing" correct? Or is the rotor to cap orientation an issue? I
seem to remember that Keith was grinding away part of his dizzy cap
to look at just this issue. Keith, care to wade-in with some
knowledge?

Bottom line: I have an LU-142A. Can I use it in a 40953 without
issue? Or should I buy an LU-148 (just to be safe)? Unfortunately,
the best of the archives seem to be my own "expert" opinion. I don't
trust myself. Anyone else willing to offer their own experience?
Please.

Rich Boyd










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