Need help with old mods

k10boy

Member
Joined
Mar 6, 2013
I have an '84 Grand National that I bought in Maine. The previous owner bought it out of New Brunswick, New Jersey. I need help on figuring out on what was done to the car before the previous owner had it. It has an electronic boost controller that goes from 0-7. 0 shuts the car off and 7 boosts the car to 14lbs. It also has some kind of fuel enhancer wired under the dash. It has a button on the shifter the guy told me it was a linelock and when you press it the brake light comes on the dash, the front brakes lock on and you can hold the gas and the car just burns out.

In front of the shifter are 2 little boxes. One says air/fuel ratio(when I turn it on it reads 17.1) and the other box has just a switch on top and then a red button. Theres a light on the back of it though that flashes red whenever I boost.

It also has a Boch fuel pressure gauge set up under the hood, not sure if the injectors are stock.

It has a Garret M10 turbo not sure if that is stock and a ram air intake set up that goes down into the bumper. Any help and tips would be greatly appreciated! I tried attaching pictures of everything I'm talking about
 

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looks like an ATR uppipe and possible headers, looks like an adjustable fuel pressure regulator, might even be an ATR downpipe. i bet it has pretty good power. looks like a k&n/ATR/or kenne bell cold air intake filter could be set up alittle neater, also that looks like a poston thumbwheel it gives different settings fuel/air/boost(kinda like having 7 different chips in computer)
 
Yes i was wondering about the headers they dont have a flange where the crossover bolts up, instead ot slides over the header and uses a clamp. Yeah that switch im the most curious about! It doesn't like being over 5, thats when it detonates or does whatever it does
 
from poston book- ultrachip-settings
setting - 1/2 .3 .4 gear boost .rev limit .top speed timing . feature
0- antitheft 000 000 000
1 12. 12. . 12 lbs 4800 . . 65 16. . valet
2 14.8 . 13.8 . 13.2 .5600 .160 .22 .stock
3 17.6 .17.6 .17.6 .6000 .160 .18 .91 octane
4 .18 . 18 .17 . .6000 .160 . 20 .93 octane
5 .18 .17.8 .17 . . 6000 .160 . 22 .98 octane
6 .18 . 18 . 18 . . 6200 .160 .24 .100 octane
7 .19.2 19.2 .19.2 . 6200 .160 . 26 .110-113 octane
 
from poston book- ultrachip-settings
setting - 1/2 .3 .4 gear boost .rev limit .top speed timing . feature
0- antitheft 000 000 000
1 12. 12. . 12 lbs 4800 . . 65 16. . valet
2 14.8 . 13.8 . 13.2 .5600 .160 .22 .stock
3 17.6 .17.6 .17.6 .6000 .160 .18 .91 octane
4 .18 . 18 .17 . .6000 .160 . 20 .93 octane
5 .18 .17.8 .17 . . 6000 .160 . 22 .98 octane
6 .18 . 18 . 18 . . 6200 .160 .24 .100 octane
7 .19.2 19.2 .19.2 . 6200 .160 . 26 .110-113 octane
THANKS ALOT! Now it makes sense why my car detonates when its set on 5 or 6 when im running 93. Ive been driving it around on 3 which is about where it should be. I wonder how it would go on 110 on 7?
 
You could try Sunoco 100 ul on setting 5 but it's $9.25 a gal at the station down the street from me...
 
Yeah the best i can get around here is 93, unless i go to the track. So where exactly is this switch wired into to, i havent had time yet to follow the wire. Does it use an actual chip as well?
 
Yeah the best i can get around here is 93, unless i go to the track. So where exactly is this switch wired into to, i havent had time yet to follow the wire. Does it use an actual chip as well?

The thumb wheel is wired directly to the Ultra Chip which is in the ECM. This is old school as you already know. Brad
 
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