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BJ & FJ Ratio
Posted: Sun Jul 15, 2007 1:58 pm
by SOFT 40
Hi all, I just wanted to know if the diff ratios are the same and what about the transfer case. I have only just picked up a BJ40 and my Speedo is out. It has 31/10.5/15 tyres on it + what type of speed should I get out of it. The old girl is flat out doing 100kmh on my GPS. Any info would be good.
Shorne
Posted: Sun Jul 15, 2007 2:26 pm
by DIRTY ROCK STAR
what yr is it champ? and 4 speed?
Posted: Sun Jul 15, 2007 3:02 pm
by SOFT 40
Don't know what year, might be a '79, full fiberglass body, 4 speed, i think that it is a bitsa.
Posted: Sun Jul 15, 2007 5:20 pm
by shorty_f0rty
pretty sure i've got 4.11's in my 1984 bj42..
doing a speedo test with my 33's on i register .9kms per 1km.. so i figure with 32's they should be about right.. and on 31's they'd be a bit more.. not 100% sure though..
Posted: Mon Jul 16, 2007 8:51 pm
by SOFT 40
Is there any engraving or tags on the diff that tells you the ratio? Or do you have to pull out the center and look at the gearing? I am new to cars, I just ride bikes.
mmm
Posted: Mon Jul 16, 2007 8:57 pm
by turbo42
No marks from factory that I have ever seen, usually just count teeth of spin the drive flange and measure the wheel turn.
Posted: Tue Jul 17, 2007 11:19 am
by bj on roids
4.11 is bound to be your diff ratio, t-case is easy with a search,
the only other factory diff options are 3.7 and 4.10 neither of which you will have in that year model
Posted: Tue Jul 17, 2007 7:50 pm
by SOFT 40
Thanks for the info guys. What speed is normal for a BJ40?, I was thinking around 120 to 130 kmh tops.
Shorne
Posted: Wed Jul 18, 2007 1:47 pm
by DIRTY ROCK STAR
SOFT 40 wrote:Thanks for the info guys. What speed is normal for a BJ40?, I was thinking around 120 to 130 kmh tops.
Shorne
you are too used to bikes i think dude.
as a stocker i reckon 100-110 would be all.
Posted: Wed Jul 18, 2007 2:38 pm
by WICKED
DIRTY ROCK STAR wrote:SOFT 40 wrote:Thanks for the info guys. What speed is normal for a BJ40?, I was thinking around 120 to 130 kmh tops.
Shorne
you are too used to bikes i think dude.
as a stocker i reckon 100-110 would be all.
LOL righteo get of the drugs twon! there not race cars man!
Posted: Thu Jul 19, 2007 9:59 am
by DIRTY ROCK STAR
get a 2F up ya then!
atleast you can drive at normal speeds.
what top speed do you get from a B motor then??
Posted: Fri Jul 20, 2007 1:02 pm
by bad_religion_au
i've seen a stock HJ45 wind off the speedo.
top speed i've seen in the fj40 was 140 on 33's.
wouldn't want to try it now...
Posted: Fri Jul 20, 2007 8:35 pm
by davidwalton
done 160kmph in my fj40 with 4.11 and 35" soa.
Only thing it has a 350 chev. shit my self dooing it.
Posted: Fri Jul 20, 2007 9:04 pm
by Reddo
brrrrrrrrrrmmmmmmmmmmm
thats with 35's, SOA, and a 2H....... and after backin off.
top speed
Posted: Fri Jul 20, 2007 11:10 pm
by Gibonator
AND NO TAIL SHAFT = goin no where
Posted: Wed Jul 25, 2007 4:59 am
by cloughy
Old boys old shorty I used to use years ago would see $1.50 with 31's, farking hard to keep on the road but
must be somewhere around the governor, cause it wouldn't pull any more, 32's killed it and all it would see is 135
Give my RR a squirt the other night, $1.70 for a quick one, but the poor centipedes get a little uncontrollable
Posted: Wed Jul 25, 2007 9:00 am
by fullmetaljacket
flat road, no wind, 33's, my "B" can do 130k's by GPS reading (who want to go over 100-110 any ways), my mates 2f 45ser can do 170 easy.....