Thanks Gary,

Even our US spec 1200's had the single groove pulleys?

Some 1200s have two-groove pulleys. Mainly those with Air conditioning.

12303-18002 is a Datsun B10 part number (180) and was used on all 1970 and 1971 Datsun 1200s (both RHD and LHD 1200s).

Hi Guys

Doing 50 MPG is much easier possible , with no more adjustment,mine did 55MPG recently bit of a hill country side even .

Thanks
Regards
Sumith

Yes, 1978 B-210 with 5-speed was government rated at 50 mpg.

Quote:That's terrific mileage Sumith. I am wondering, does Sri Lanka use the same gallons as the US gallons?

My car is in the nifty fifty club; and is essentially well maintained stock, with the exception of headers, a little port matching/deburring, 32/36 Webber and Jacobson ignition. Actual cc=1407.
I have driven coast-to-coast more then 4x's with 350-400lbs of gear and averaged 39-45mpg on the freeway if I stayed under 75mph.I easily break 50mpg on my monthly 478 mile trip to see my kids. I have been too impatient to see what type of mileage I would get at 55mph.

longbrow is yours 4 or 5 speed and what size tyre?

Rebuilt to stock gear ratio’s 60A 5 sp from ‘82 210. Tire 155 80 13(stock)
Other notes:
Have a couple of 63A's I am rebuilding but never road tested (the 63A was the original 5sp option for the B210)
Currently running 175 70 13's with a little decrease in MPG (45-50 no extra weight) as long as I keep at 75mph or below. If I hit 80mph my mpg immediately goes to @#$%.With original 60 series 4sp I would get comparable mpg at 55mph or below. In short, if I am not getting 40+ mpg something is wrong.
Gear ratio= 37/10
Deburred and port matched H72 head and H72 intake.
Significant weight removed from car = cast iron exhaust and complete AC system.
I rebuilt my A14 engine with cheap free power and volumetric efficiency (close matching stock bore and stroke help this and why engine size was only increased to 1407cc, camshaft, and crank stock)in mind so I concentrated on breathing and exhaling. I am probably a little obsessive with my tune-ups,check valve clearance every other oil change(6000mi),change out and index spark plugs(gap=.051) every 6 mons. I am a firm believer in a strong ignition system.
For the environmentalist:
Really all I cared about was fuel, air and fire, and ironically after this I have additional horse power/TQ (never measured, but I know its there, maybe high 80’s hp?)and the engine burns cleaner then when it was stock this was measured as I kept all my smog test records(required until a car is 25yr old in GA USA) and took a smog test just to see how my engine was burning-all emissions were below all readings in all categories for my last 5 smog tests.

Hi blownb310

I also did Not expect , but it did greatly , Here a Gallon means 5 liters only,

Thanks
Regards
sumith

USA gallon is 3.78 liter. So you can see 50 (USA) miles/gallon is very, very good. Among the new cars here, only Toyota Prius has better fuel economy than 1978 B-210! Smart car gets less economy than our 30-year old Datsun.