Hey, i was just wondering what the lowest ratio is for the banjo diff? right now i have 3.08 and i want something lower, is 2.78 the lowest you can go? does anybody know where i can get one from for a reasonable price in vic?
thanks
banjo diff ratios
Started by
_L_X_Hatch_
, Nov 26 2005 05:06 PM
14 replies to this topic
#2
Toranavista
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Posted 26 November 2005 - 05:32 PM
For banjo 2.78. Always hard to know what your getting when buying secondhand diffs. You either need to buy off somone trust worthy that you know. Or alternatively pay a bit more for one that cones with some form of guarantee.
#3
_JNR_ATE_
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Posted 27 November 2005 - 12:02 AM
Its easy to tell if the centre is out.
If you got time and a calculator handy, count the teeth on the crown wheel and count the teeth on the pinion.
Divide the crown by the pinion, thats if your worried about the ratio and it isnt printed near the yoke seal.
Cheers
JNR_ATE
If you got time and a calculator handy, count the teeth on the crown wheel and count the teeth on the pinion.
Divide the crown by the pinion, thats if your worried about the ratio and it isnt printed near the yoke seal.
Cheers
JNR_ATE
#4
warrenm
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Posted 27 November 2005 - 08:00 AM
You shouldn't need a calculator as the ratio is stamped into the crown wheel.
#5
MRLXSS
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Posted 27 November 2005 - 11:11 AM
haha ^^ i agree
i think u can go down to a 2.60 ratio in a banjo, but personally thats just too low
i think u can go down to a 2.60 ratio in a banjo, but personally thats just too low
#6
_CHOPPER_
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Posted 27 November 2005 - 11:58 AM
A 2.60 ratio is NOT available for the banjo diff. Unless you can get somebody to make the gears for you. Then anything is possible. BTW, a 2.6 ratio is a HIGH ratio, the 3.9 is a low ratio.
#7
MRLXSS
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Posted 27 November 2005 - 12:05 PM
yeh yeh figure of speech everyone knew wat i meantA 2.60 ratio is NOT available for the banjo diff. Unless you can get somebody to make the gears for you. Then anything is possible. BTW, a 2.6 ratio is a HIGH ratio, the 3.9 is a low ratio.
#8
_QIKSLR_
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Posted 28 November 2005 - 07:25 PM
Aggree with chop. 3.9:1 is the lowest ratio and 2.78:1 highest. Generally when people change diff gears they go lower, not higher.. Why would you want a 2.78? Nothing like going back to first on corners. What gearbox have u got? It makes sense if you've got a celica/supra box with a ~3:1 first gear and shitty overdrive.
Edited by QIKSLR, 28 November 2005 - 07:28 PM.
#9
surfmaster
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Posted 28 November 2005 - 08:50 PM
3.55:1 (manual) through to 2.78:1 (auto) are the most common ratios.
#10
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Posted 29 November 2005 - 10:14 AM
yeh i have a 2.78 in mine and its shits me sometimes, even on a rolling take off i have to change bak to first, and its hard to get the wheels chirping in the dry, haha, i got a 3.9 for the drag day though!!
#11
enderwigginau
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Posted 29 November 2005 - 01:07 PM
As some bits from Salsburys can be used in Banjos it is possiblr to build a 2.6 Banjo centre.
I'll have one, if somebody wants to build some.....
Grant..
I'll have one, if somebody wants to build some.....
Grant..
#12
_draglc_
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Posted 29 November 2005 - 01:34 PM
is it possible to make banjos stronger using salisbury bits grant?
#13
_redlh_
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Posted 29 November 2005 - 01:38 PM
What ratio you get should depend on what sort of driving you intend on doing. With the price of fuel these days, you wouldn't want a 3.9 if you did a lot of highway driving. Likewise, you probably wouldn't want a 2.78 if you were in stop-start city traffic every day.
For example, travelling at 100kph with a 3.9 diff in 4th gear (M20/21) your engine would be doing 3257rpm. With a 2.78 diff and the same gear, the engine would be doing 2321rpm.
I run a T5 and a 9" with 3.0 gears. At 100kph in 5th gear (0.73) the 308 is doing 1828rpm.
Your call.
For example, travelling at 100kph with a 3.9 diff in 4th gear (M20/21) your engine would be doing 3257rpm. With a 2.78 diff and the same gear, the engine would be doing 2321rpm.
I run a T5 and a 9" with 3.0 gears. At 100kph in 5th gear (0.73) the 308 is doing 1828rpm.
Your call.
#14
warrenm
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Posted 30 November 2005 - 07:24 AM
The main problem with the strength of the banjo is the axle size. The banjo has 10 or 23 spline axles available, where the 10 bolt salsbury has 28 spline. The small salsbury has the same size crown wheel, pinion, side gears & bearings.
#15
_QIKSLR_
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Posted 02 December 2005 - 01:03 PM
My last bango was a 3.9 and it was a brillient ratio, it just pulled and pulled and pulled, it was like a non stop powerband. But as usual I only got a few kms out of it before it broke the pin (power shift up to 3rd).
Banjos are just uttery piss weak. If you've got any sort of power and intend to use it, forget it. There was a guy on here making a custom billet full spool and axels for his LC, I'd be interested to see how that went.
Between me and my mates we have broken every possible part of a banjo diff.
- Snapped both types of axels
- Torn the teeth off the spider gears
- Snapped the pin
- Broken the spider gears into 4 peices (thats after welding them up - waste of time)
- Snapped the baring caps in half
- Chipped the crown gear
- Snapped the pinion gear
- Written off a case (due to the pin reeming out the hole)
The best setup we found was a minispool in an LSD casing with the 23 spline axels. It was easy to twist axel splines, but overall it was the best for reliabilty, you just gotta keep pulling them out to inspect for twisting. (if its twisted, it will snap soon).
Now we're all running 9"s and we've never looked back.
Banjos are just uttery piss weak. If you've got any sort of power and intend to use it, forget it. There was a guy on here making a custom billet full spool and axels for his LC, I'd be interested to see how that went.
Between me and my mates we have broken every possible part of a banjo diff.
- Snapped both types of axels
- Torn the teeth off the spider gears
- Snapped the pin
- Broken the spider gears into 4 peices (thats after welding them up - waste of time)
- Snapped the baring caps in half
- Chipped the crown gear
- Snapped the pinion gear
- Written off a case (due to the pin reeming out the hole)
The best setup we found was a minispool in an LSD casing with the 23 spline axels. It was easy to twist axel splines, but overall it was the best for reliabilty, you just gotta keep pulling them out to inspect for twisting. (if its twisted, it will snap soon).
Now we're all running 9"s and we've never looked back.
Edited by QIKSLR, 02 December 2005 - 01:05 PM.
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