Retroanaconda Posted April 23, 2012 Share Posted April 23, 2012 I find sitting at 55-60 mph to be about the most efficient speed. At that speed on a long run my 90 will do 32mpg and I'll get about 310-320 miles between fill-ups. Quote Link to comment Share on other sites More sharing options...
Escape Posted April 23, 2012 Share Posted April 23, 2012 Just a thought, if you're running non-standard tyre sizes, make sure to use the actual mileage to calculate fuel consumption, and not what you read on the tripmeter. It wouldn't be the first time I heard people complain about economy after going from 29" to 32" tyres, only to be surprised when I pointed out the speedo and trip would be underreading by about 10%. Quote Link to comment Share on other sites More sharing options...
ejparrott Posted April 23, 2012 Share Posted April 23, 2012 I find sitting at 55-60 mph to be about the most efficient speed. At that speed on a long run my 90 will do 32mpg and I'll get about 310-320 miles between fill-ups. As do I, get 35 out of the TDi'd 88 that way... Just a thought, if you're running non-standard tyre sizes, make sure to use the actual mileage to calculate fuel consumption, and not what you read on the tripmeter. It wouldn't be the first time I heard people complain about economy after going from 29" to 32" tyres, only to be surprised when I pointed out the speedo and trip would be underreading by about 10%. When I'm on a run to calculate MPG, I always take the satnav to record the mileage, every trip it does. Quote Link to comment Share on other sites More sharing options...
rusty_wingnut Posted April 23, 2012 Share Posted April 23, 2012 I must admit I am running 235 85s @ 35psi and have the blue speedo drive gear in the transfer box. To answer Daan, when you trace a 300tdi's intake pipework, the route goes down to a drain point (?) bolted near the brake bias valve on the driver's footwell in the engine bay. When you unbolt this plastic gizmo it has a very small bore size, so I replaced the entire pipe run with 3" bore flexi directly from the airbox out to the wing - my reason being she can breathe a bit free-er. Quote Link to comment Share on other sites More sharing options...
Yostumpy Posted April 23, 2012 Author Share Posted April 23, 2012 As do I, get 35 out of the TDi'd 88 that way... Ah! but you're cheating, as you're only in 2wd. Quote Link to comment Share on other sites More sharing options...
ejparrott Posted April 24, 2012 Share Posted April 24, 2012 granted, and I suspect some of it to be the weights too, the 88 is only 1500kgs, whereas the engine was designed to push around a 2 ton disco! I'd probably get better if i cleared out some of the carp! Quote Link to comment Share on other sites More sharing options...
Daan Posted April 24, 2012 Share Posted April 24, 2012 I must admit I am running 235 85s @ 35psi and have the blue speedo drive gear in the transfer box. To answer Daan, when you trace a 300tdi's intake pipework, the route goes down to a drain point (?) bolted near the brake bias valve on the driver's footwell in the engine bay. When you unbolt this plastic gizmo it has a very small bore size, so I replaced the entire pipe run with 3" bore flexi directly from the airbox out to the wing - my reason being she can breathe a bit free-er. Ok, I am not using any of that standard intake, so no change needed there. Daan PS, have you got video footage of the muppets in action club? Sound like a very promising name for an offroad club... Quote Link to comment Share on other sites More sharing options...
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