N/A retro update.....

[Freddie's Buick]

My experiment was a success. I've learned a couple of things....and I got a few ideas. Click the link:

http://members.telocity.com/~familiadiaz/Retro.jpg

Here's the recipe:

1) 1979-Chevy V-6 HEI/VAC distributor.
2) 1980 Pontiac Q-Jet Modified. Click the links:

http://members.telocity.com/~familiadiaz/HEI-VAC.jpg
http://members.telocity.com/~familiadiaz/'80 Carb.jpg

I removed the ECM, ECM fuse, ISC, A.I.R. pump w/plumbing and EGR valve. I also made my own E.E.C. Click the link:

http://members.telocity.com/~familiadiaz/EECS.jpg

Pros: A whole lot less spaghetti. (There's actually an engine under there... ). All adjustments are easier and no inteferance from the computer trying to compensate. She's faster now than with the ECM, but I have not had much time to evaluate the totality.

So I will say it's inconclusive. (Besides, I did a boo-boo on the firing order months back and I did'nt even know this till I removed the EST distributor. 1-2-3-4-5-6 instead of 1-6-5-4-3-2 .... ).

What's bizarre is that with the ECM system it never backfired and it ran very good? But when I installed the HEI/VAC.....pop-corn city! Wow!

Cons: Obviously...not as fuel conserving. But enough to concern me. (I've grown used to my previous milage consumption). This I'm still evaluating.

I got an idea also. What if one can keep the Electronic Q-jet and ECM system but bypass the EST? This would result in maintaining the ECM's excellant fuel conserving capablities, yet allow the driver to maintain full throttle and timing advance the old fashioned way....at the pedal.

Here's my idea: Remove the EST/HEI distributor. Next, install a HEI/VAC distributor. On the 4-prong EST connector lead to the ECM connect a wire from the 'C' prong to the 'C-' terminal on a HEI/VAC distributor. On the 'B' prong connect a wire going to the 'TACH' terminal of the distriburor.

If the voltage at the 'TACH' terminal of the HEI/VAC distributor is 5-volts, (I have'nt checked yet), then in theoy this would fool the ECM into thinking that the proper voltage is being recieved for it to control the spark. Click the link:

http://members.telocity.com/~familiadiaz/EST MODULE.jpg

As for the 'lock-up switch' for the THM 350-C Transmission, most forums I posted on agree that no damage may result from not using the 'lock-up' function. But on the highway it's good for cruising. For now I'll just go without it.

 

[RCI2990]

ironically i'm using the same carb and dist. if you don't have strict emissions where you are then don't worry about trying to keep anything left over from the emissions.hey freddie guess what the wife is getting me for christmas? yep a msd ignition system,i can't wait.if it's nice out tomorrow i'll take some pics from under the hood and post them on here.cheers.

 

[Freddie's Buick]

Mark,

Once you have it....ask me if you have any questions about how to set it up.

We no longer have emissions checks in south Florida. But the set up I got is fuel saving and is less harmful to the enviroment. It just makes good sense.

 

[Ttype83]

Hey Freddie, There is a engine under all that stuff
It sounded like alot of work, but was isn't.

Now that you have gone retro want your you going to do with the 83 carb........

Have you gotten a chance to check out my web site yet?
For some reason your link is not working off of my site
It's got to be a typeO in it. I'll figure it out....

Jim

 

[Freddie's Buick]

Yep,

Got to see your site. I did notice the link-up to my website did'nt work, (I figured it's an ongoing project just like mine....unfinished).

The first generation ECM Buicks like mine are alot simpler than the '83's. So the retro converstion is not too complex.

Since I am still evaluating this mod, hopefully by the end of the month I'll put back the ECM system for a final determination.