HEI Distributors

[wayne nesbitt]

When I had Alex Sirum rebuild my 73-455 a couple of years ago I bought a
rebuilt 75 OLDS 455 distributor from Autozone to replace the mechanical one
that was pretty tired.

I didn't realize that it was any different than the ones installed in the
motorhome. Alex and another friend who has test driven my coach said it
didn't seem to have as much get up and go as theirs.

It does make sense that they would put a different module in to put in
slightly less advance due to the heavier load on the engine.

Can I just get a GMC module somewhere and change it or is there something
else that has to be done to the distributor?
TIA
Wayne

 

[gene]

Read about recurving your dist. on my web page. I just did it using a
timing light and the marks on the harmonic ba lancer , and you could not
believe the difference. The module is not the difference it is the timing
of the base,vac adv., and the fly weights. If you want to have it done you
can send it to Lamey to have it done, but yours might be ok with some work

gene

>When I had Alex Sirum rebuild my 73-455 a couple of years ago I bought a
>rebuilt 75 OLDS 455 distributor from Autozone to replace the mechanical one
>that was pretty tired.
>
>I didn't realize that it was any different than the ones installed in the
>motorhome. Alex and another friend who has test driven my coach said it
>didn't seem to have as much get up and go as theirs.
>
>It does make sense that they would put a different module in to put in
>slightly less advance due to the heavier load on the engine.
>
>Can I just get a GMC module somewhere and change it or is there something
>else that has to be done to the distributor?
>TIA
>Wayne
>
>
Genef -- 77PB/ore/ca
GMC MOTORHOME INFORMATION
mr.erf
http://www.california.com/~eagle/