trying to simplify here...

i want to run an LT1 wiring harness and pcm on an OLDSMOBILE v8. the distributor drive works in reverse rotation from a sbc. so, my optispart would have to turn in reverse rotation.

would this work? or just totally be confused?

 

What part of the Opti do you plan to use - the complete thing, or just the optical sensor? How do you plan to adapt it to the Olds block?

 

im adapting a complete unvented opti to the top of the oldsmobile distributor. basically removing a center piece of an LT1 cam timing gear, and welding it to where the advance weights once were. this will give me the drive portion for the opti. then i just have to fab up a mount plate for the opti mount bolts.

however, i am open to suggestions such as using only the optical part of the opti....

thanks!

 

ok, not to bust your ***** or anything, but why on earth would you want to do this?

 

maybe i have a complete LT1 harness and opti sitting around.....
and figured it could be adapted to my oldsie. it would be nice not having to worry about getting the correct computer, and wiring harness to work with a later model olds computer controlled dizzy.

i already have a port injection setup off of a '75 caddilac seville. (olds 350) its a single plane intake with twin 55mm tb. i wanted to use LT1 injectors on it.

 

I can't see any reason the optical sensor would care which way it was rotated.... a light pulse is a light pulse.

 

Won't the pattern of the high res pulse be backwards?

ie.

Normal rotation:
101010101100110011110000

Reverse rotation:
000011110011001101010101

The low res pulse is just high low:
101010101010101010101010
So that shouldn't matter, but there could be problems with the high res side of things.

 

couldnt you flip the optical wheel? it just unscrews.......

 

i believe its the pickup assembly that would need to be flipped upside down... not sure if that could be done or not?

what does the pcm use the high level signal for? if memory serves me right i think that signal is used in troubleshooting the opti, right?

 

yeah you should be able to flip it upside down if it spins in the oppisite direction.. i just looked at one in the garage i had... also after fillping it over the cylenders wont be on the cap where you think they are you will have to fool around with it..

the low res is there to sync the the high res to the engine.. without it the pcm would have no way of knowing where it is in the firing order at startup as the high res is equil spacing....

flipping the pickup would do nothing as it is just basically a light that shines throu slots in a wheel...

 

gonna look into this... thanks!

 

if you flip the disk over wouldn't you have to drill new holes in it, if i'm not mistaken that disk has offset holes so it can't be inadvertantly put in backwards. if so you have to be very careful that you got it on straight