Nissan 2.8 SAFARI met patol ratkas
- Tinus lotz
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Re: Nissan 2.8 SAFARI met patol ratkas
Tinus - with the info Gerrit supplied it looks like a match made in heaven
The lower first gear will be nice for those difficult parts when you are heavily laden and on the open road the longer 5th gear will be good for fuel consumption. Best part is that the dead spot between 3rd and 4th of the old box will be gone!
The lower first gear will be nice for those difficult parts when you are heavily laden and on the open road the longer 5th gear will be good for fuel consumption. Best part is that the dead spot between 3rd and 4th of the old box will be gone!
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ARB Bullbar, BZT rear bar, TJM 2" Suspension, Snorkel, LT 285/70/17 BFG KO2's, 40L Engel
Stop Rhino Poaching Supporter!
- Tinus lotz
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Re: Nissan 2.8 SAFARI met patol ratkas
Yes man I do agree with you I will keep you posted I found one box in pta and the guys from jap auto is also looking for me now to find 2 weeks when the test rig is not working...........
- Gerrit Loubser
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Re: Nissan 2.8 SAFARI met patol ratkas
I don't think there will be a discernible difference in the ratio step from 3rd to 4th on the new compared to the old setup. On the old the 3rd gear ratio is 1.45 times lower than the 4th and on the new it is 1.49 times lower.David wrote:Best part is that the dead spot between 3rd and 4th of the old box will be gone!
Basically the new setup has a very similar 3rd gear ratio and of course an identical direct drive 4th. The difference is that the new setup has lower first and second gears and an additional fifth gear, so it covers a much wider range of ratios (On the new setup 5th is 5 times higher than first, while on the original setup 4th is only 3.5 times higher than 1st. The new setup has a similar mid range spread, but with 40% more total range width.
If I can get hold of an engine torque curve for the L28 motor, I could put together a cascade diagram to graphically show how the new and old setups would be matched to the vehicle.
Gerrit Loubser
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- Tinus lotz
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Re: Nissan 2.8 SAFARI met patol ratkas
Hi Gerrit
i will try and find one I had a paper copy but kind find it
regards
i will try and find one I had a paper copy but kind find it
regards
- Gerrit Loubser
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Re: Nissan 2.8 SAFARI met patol ratkas
I found a small little power curve on a Spanish spec sheet that I have. It lists the power and torque of the L28 motor:
97 kW @ 5200 rpm
213 Nm @ 3600 rpm
Does that sound right for the SA Safaris? If it is, I can use it and create the cascade curves.
97 kW @ 5200 rpm
213 Nm @ 3600 rpm
Does that sound right for the SA Safaris? If it is, I can use it and create the cascade curves.
Gerrit Loubser
2003 Land Cruiser 100 VX TD
1999 Patrol 4.5E GRX M/T ("Imvubu") - GONE; Go well Old Girl :-(
2003 Pajero 3.2 DiD LWB A/T - GONE; One of the best cars I ever had :-(
1996 Land Cruiser 80 VX 4.5 EFI A/T - SOLD
2003 Land Cruiser 100 VX TD
1999 Patrol 4.5E GRX M/T ("Imvubu") - GONE; Go well Old Girl :-(
2003 Pajero 3.2 DiD LWB A/T - GONE; One of the best cars I ever had :-(
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- Gerrit Loubser
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Re: Nissan 2.8 SAFARI met patol ratkas
If my assumptions regarding the torque curve and gear ratios of the Safari are correct, this is how the cascade curves of the four speed and five speed will compare:
The blue lines are for the four speed and the red ones are for the five speed. The dotted black line is a constant power curve and is the type of characteristic that one might achieve with a CVT. Note that the geared speeds will not necessarily be achieved due to air and rolling resistance.
The blue lines are for the four speed and the red ones are for the five speed. The dotted black line is a constant power curve and is the type of characteristic that one might achieve with a CVT. Note that the geared speeds will not necessarily be achieved due to air and rolling resistance.
Gerrit Loubser
2003 Land Cruiser 100 VX TD
1999 Patrol 4.5E GRX M/T ("Imvubu") - GONE; Go well Old Girl :-(
2003 Pajero 3.2 DiD LWB A/T - GONE; One of the best cars I ever had :-(
1996 Land Cruiser 80 VX 4.5 EFI A/T - SOLD
2003 Land Cruiser 100 VX TD
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2003 Pajero 3.2 DiD LWB A/T - GONE; One of the best cars I ever had :-(
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- Gerrit Loubser
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Re: Nissan 2.8 SAFARI met patol ratkas
I am, however doubting the gear ratio data that I quoted before. My Spanish spec sheet seems to indicate that the pick-up had the following gear ratios:
1st: 4.222:1
2nd: 2.370:1
3rd: 1.440:1
4th: 1:1
Reverse: 4.622:1
If the SA Safari pick-up had these ratios, then fitting the five speed setup won't really change anything much other than providing an extra, overdrive ratio. This is what the cascade diagram would look like:
1st: 4.222:1
2nd: 2.370:1
3rd: 1.440:1
4th: 1:1
Reverse: 4.622:1
If the SA Safari pick-up had these ratios, then fitting the five speed setup won't really change anything much other than providing an extra, overdrive ratio. This is what the cascade diagram would look like:
Gerrit Loubser
2003 Land Cruiser 100 VX TD
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- Peter Connan
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Re: Nissan 2.8 SAFARI met patol ratkas
Hello Gerrit
These cascade curves of yours are the bee's knees. What program do you do these on?
Thanks
Peter
These cascade curves of yours are the bee's knees. What program do you do these on?
Thanks
Peter
Mag ons ons kenniskry met lekkerkry aanhoukry.
- Gerrit Loubser
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Re: Nissan 2.8 SAFARI met patol ratkas
Peter, nothing fancy, I am afraid: those were done in Excel. It is all simple math if you have an engine torque curve, gear ratios, axle ratio and the tyre size.
Gerrit Loubser
2003 Land Cruiser 100 VX TD
1999 Patrol 4.5E GRX M/T ("Imvubu") - GONE; Go well Old Girl :-(
2003 Pajero 3.2 DiD LWB A/T - GONE; One of the best cars I ever had :-(
1996 Land Cruiser 80 VX 4.5 EFI A/T - SOLD
2003 Land Cruiser 100 VX TD
1999 Patrol 4.5E GRX M/T ("Imvubu") - GONE; Go well Old Girl :-(
2003 Pajero 3.2 DiD LWB A/T - GONE; One of the best cars I ever had :-(
1996 Land Cruiser 80 VX 4.5 EFI A/T - SOLD
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