Thread: High Range ratio - Puma

My guess is its going to get pretty hot pushing a laden 130 with those revs. Keep in mind you're slowing down the fan, coolant pump and oil pump.
I've got the same tune on my 2.2 130, weighing about 2400kg and feels like it could use a few more revs at 100km/h, like I need to split 6th gear.

Mine is happy at 100kmh in sixth at about 2000 revs. It has a Steinbauer chip.

Oh, my tyres are standard 235/85/16.

Originally Posted by MLD

Q - Is a 1.003 gearset asking too much of the Puma engine and 6th gear at highway speeds.

yes

thanks all. i reached out to Dave Ashcroft. I went with the 1.1 gearset. It will return my kph to rpm relationship back to the factory gearing and tyre set up. Instead of sitting on 90kph on the hwy i should be able to sit on 100 kph while the old girl is in her happy place at 2000 rpm. Worst comes to worst i refit the 1.221 gear set. cheers

Originally Posted by MLD

thanks all. i reached out to Dave Ashcroft. I went with the 1.1 gearset. It will return my kph to rpm relationship back to the factory gearing and tyre set up. Instead of sitting on 90kph on the hwy i should be able to sit on 100 kph while the old girl is in her happy place at 2000 rpm. Worst comes to worst i refit the 1.221 gear set. cheers

...or standard size tyres

Originally Posted by Zeros

...or standard size tyres

fitting standard tyres, by itself, isn't going to fix the problem of high rpm on the highway. I am 8% lower gearing than factory with the 4.11's even allowing for the 35's. It i was to put 235/85's on it, the gearing would be about 18% under geared compared to the factory set up, increasing the 100 kph rpm to 2400 from 2000 (for stock) or from 2200 with my current set up. It is cheaper to rebuild the transfer than to rebuild the 2 diffs with 3.54's (incl the cost of buying new C&P especially for a sals). Sometimes when you venture too far from stock it is cheaper to take an alternate route than to backtrack. I still want my cake and eat it (play truck on weekends and touring truck when i go outback).

Originally Posted by MLD

fitting standard tyres, by itself, isn't going to fix the problem of high rpm on the highway. I am 8% lower gearing than factory with the 4.11's even allowing for the 35's. It i was to put 235/85's on it, the gearing would be about 18% under geared compared to the factory set up, increasing the 100 kph rpm to 2400 from 2000 (for stock) or from 2200 with my current set up. It is cheaper to rebuild the transfer than to rebuild the 2 diffs with 3.54's (incl the cost of buying new C&P especially for a sals). Sometimes when you venture too far from stock it is cheaper to take an alternate route than to backtrack. I still want my cake and eat it (play truck on weekends and touring truck when i go outback).

Gotcha. So it goes the other way... only got yourself to blame then! But it sounds like you've got a good solution. ...How are your uni-joints holding up?