77 B210

[ericsb210]

New to Ratsun. I have a 77 B210 GFU Hatchback. I am accumulating all the wearable parts to restore it (brake system, shocks, steering components, etc.). My goal is to surpass the 50 mpg advertised rating for it. Plus, have a nice reliable rig. Some of the things I am doing are; 5w/20 synthetic, Redline MT-90 synthetic (tranny and rearend), sythetic wheel bearing grease, making sure that none of the new brake system causes a drag on the wheels, reducing weight (considering updating the bumpers).

 

Any thoughts out there on what else to do? I will post pictures later.

[CharlieBucket]

New to Ratsun. I have a 77 B210 GFU Hatchback. I am accumulating all the wearable parts to restore it (brake system, shocks, steering components, etc.). My goal is to surpass the 50 mpg advertised rating for it. Plus, have a nice reliable rig. Some of the things I am doing are; 5w/20 synthetic, Redline MT-90 synthetic (tranny and rearend), sythetic wheel bearing grease, making sure that none of the new brake system causes a drag on the wheels, reducing weight (considering updating the bumpers).

 

Any thoughts out there on what else to do? I will post pictures later.

 

 

nice man, i am torn on whether turning my 77 into a scca racer or going the daily driver/mpg route your taking. let's see some pics!!

[ericsb210]

I will post picks tomorrow. Be forwarned it is in transition right now and not a pretty sight!

[ggzilla]

Those changes should allow you to exceed the 5-0 on the highway at 55 mph.

 

One club member bested 77 mpg with his B210 in a measured competition. Read about it here: Ratsun: A-series fuel mileage record holder?

[Pumpkn210]

I felt a big difference when I went to alum wheels(rotating mass and un sprung weight) Also taller wheels and tires change the gear ratio higher!

[ggzilla]

I went from stock steelies and tires (22 lbs each) to aluminum (same diameter) and wider, lower tires (22 lbs each). YOU CAN HAVE YOUR CAKE AND EAT IT TOO!

[Guest kamakazi620]

plus longer gears are great for mileage!!! theres a reason why a crx HF can redline at 5500 rpm at 55-60 mph in first gear!!

[ericsb210]

Just put new tires on my steelies:) If I decided to go alum. with a taller tire to achieve a higher ratio, is there a way to adjust the spedo for accuracy?

[ggzilla]

Sure, you change the speedometer gear in the transmission. Nissan has several different gears for this.

[ericsb210]

Does anybody have a chart or a source for the speedometer gear to tire size matchup?

 

Also, if I go from a 155sr13 to a 155sr15 (of which I estimate a 10" dif in overall circumfrance) how much of a percentage of MPG could I expect? I was thinking about 10%, does that sound resonable?

[greybeard]

You don't want to go too tall a tire/gear and get out of the engines efficiency range.

 

as for tires skinny is better for aero and has less rolling resistance.

 

Lowering a little will also help, maybe find one of the old flexdam airdams for the car.

 

if you don't remember, it was an airdam that had a rubber lip at the bottom so it could to get up driveways.

 

I always liked the way they looked.