codeslinger57

I have a complete throttle body setup I want to put on an older 79 camaro I have. I am pretty sure how to get everything that is needed adapted over and working, except for the VSS. Is there a way to go around even having it on the car, or in other words, can i delete it all together, or is it really essential to the fuel calculations the computer does.

Or is there a way to hook one up to work with the cable driven speedo. I think I remeber seeing some cars with an external sending unit in line with the speedo cable, but dont remeber what on.

Im not looking for ward to trying to cobble up my dash to get a non stock speedo head with a vss unit crammed in a dash board that it dosent really fit in. I have also seen some converted GM systems for sale to retro fit older cars to EFI that dont say anything about hooking up a VSS. I would really like to use the system I have already that came off a 1991 pickup.

Thanks for your help and suggetions.

dimented24x7

iTrader: (2)

You need the VSS or the car will never idle properly. Some of the older camaros, trucks, and Im sure a bunch of other GM cars had the VSS/buffer box on the back of the speedo. You can probably also get a cable driven VSS aftermarket as well. Im sure someone makes such a thing.

codeslinger57

I guess Im not following, since the car isn't moving at idle, how would the VSS have an influnce on idle quality? Does it have something to do with coast down mixture, or IAC motor positioning?

Thanks again

PS...dimented i saw a pic of your motor on another thread, and thats a really wild looking MAF setup. Is that better than runing a MAP? And also are you running a TBI based computer, or a Tuned Port type code? sorry for getting of subject...

dimented24x7

iTrader: (2)

Without the VSS, the computer has no way of knowing that the car is stationary, or when to transition from idle to run and so fourth. Theres alot of stuff thats influenced by the VSS. Throttle follower, idle routine, decel fuel cut off, etc.


NP, the code was stuff that I wrote for the stock ECM. It worked well, was easy to tune, and even passed emmisions, but the ECM really didnt have enough processing power to allow for all the needed code, so Im currenty transitioning to a PCM. So its back to speed density untill I figure out how to best tie in the MAF.