Trying to find out a little more about the 1977 GC111 I just got.

The dash has a boost gauage (far right side of panel next to speedo). Gauge is marked boost and just above the needle reads "DRIVE". From looking on the web, i thought the GC211 was the first style for the turbo EFI motor.

My car was modified in Japan with triple DCOE carbs, but the EFI harnes remains in the car.

Any help or comments......

Looks like a vacuum gauge to me. They were all the rage over here in the mid to late 70's when the fuel crisis was hitting its peak.

Yeah looks like a vacuum gauge to me also.

Love your nissan compe handle though!

wanna swap it for a standard K steering wheel?

Yeah, vacuum gauge.

If it was boost then it would have a 'zero' position somewhere within the scale and the pointer would sit on that marker with engine off.

Has to be done that way so the gauge can display both below and above atmospheric pressure.

Possible that JDM had a L20E that early but very unlikely an L20ET

I wouldn't mind that steering wheel either!

Thanks for the input guys. I thought is was strange to call it a boost gauge if all it does is measure vaccum. I don't want to pull the dash apart just to track down where the lines run to. Maybe if I switch over to the brushed metal look instead of the fake wood grain I'll take a look at the back side.

Dispite the tempting offers, I think I'll keep the stearing wheel for now.

Yeah they put the vacuum gauge into cars and called them economy meters, since the greater the vacuum, the more fuel you were using.

My car has an Amp meter in the same spot.

Does your oil pressure gauge work? Mine mostly stays on 0.

Oil gauge works fine. Needle is straight up at anything over 3000 rpm. I took it on a 300 mile round trip on the weekend. Ran really strong at highway speeds (80-85mph). Carbs needed to be tweaked but otherwise everything else is fine. Couldn't be more happy with the car. Got a whole lot of looks and everybody wanted to know what it was. With not many of these beasties in the States, you spend a lot of extra time in parking lots and gas stations talking to people about the car. That's way cool that they generate that much intrest.

you so right. people of from all walks of life are curious about this car

once, i pulled into a gas station, and was suprised to hear some guy lecturing another motorist about my car

Yeah they put the vacuum gauge into cars and called them economy meters, since the greater the vacuum, the more fuel you were using.

My car has an Amp meter in the same spot.

Does your oil pressure gauge work? Mine mostly stays on 0.

Hi ya Craig,

Vacuum gauges setup for in dash reading generally show a sweet spot or a range that indicates best economy driving. Hard acceleration would show low to nil vacuum, while overrun will show high vacuum.

I still swear by them for tuning older carbed engines.