Turbo's
Submitted: Sunday, May 03, 2009 at 18:31
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Ross H (QLD)
There has been a few threads lately on turbo's so I thought I would share with you all a turbo sucsess story. (
mine).
About a month and a half ago I fitted a garret variable vane turbo to my navara and have put a few tanks of diesel through now.
My fuel economy is about the same 10's around town and mid 9's on the highway but economy was not the reason for the change.
What I was after was a bit more power when towing.
The change is unbelieviable you cannot flick the gear stick fast enough as the turbo has no lag at all. The car will pull from 1000rpm in fourth gear with no labouring at all , so all in all am very happy with the results.
What was interesting was when the dyno was done with the larger than standard tyres was how much torque and power was lost.
I remember reading a thread not long ago when I think footy put up some results with different tyre sizes.
In my profile is two dyno charts one from me the other was another navara with the same work done as
mine just smaller tyres
It is a real eye opener what tyre size can do to performance.
So if anyone else is thinking of doing this I can highly recomend it.
Regards
Ross
Reply By: Member - Graham H (QLD) - Sunday, May 03, 2009 at 19:38
Sunday, May 03, 2009 at 19:38
Was going to post a bit about turbos and towing so here goes.
Have an EGT gauge on my Cruiser and interestingly found this.
Watched it today coming back to
Erldunda from Kings Canyon.
Am towing a 2.8 tonne van Was windy,side to front quarter.
In overdrive EGT got up to 400deg even on a long gradual downslope.
Drop it back into 4th and it dropped as low as 325 even on slight upslope.
One for those who say dont tow in overdrive.
Coming up from Pt
Augusta to
Coober Pedy got 7k per litre mostly in 4th which I thought was pretty good.
Cheers
AnswerID:
363014
Follow Up By: Ross H (QLD) - Sunday, May 03, 2009 at 19:53
Sunday, May 03, 2009 at 19:53
Hi Graham
Where have you got your EGT guage fitted before or after turbo.
Mine is before so my temps change very quickly but gives you a more accurate reading on what the engine is doing.
Have been told temps can vary upto 150deg plus across the turbo.
Ross
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Follow Up By: Member - Graham H (QLD) - Sunday, May 03, 2009 at 20:20
Sunday, May 03, 2009 at 20:20
Mine is about 3 ins below dump pipe in a 3"exhaust.
Too much trouble to take it apart and do it pre turbo.
Have been told to allow 200deg difference.
Had
mine up to 500deg going up a long
hill between
Batemans Bay and
Canberra when pulling hard near the top of the ranges.
Lugging obviously doesnt pay and yet it was getting along OK this morning.
Going on fuel usage the other day running in 4th doesnt make it any worse either.
Only travel at 80-90 anyway with van on.
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Follow Up By: Ross H (QLD) - Sunday, May 03, 2009 at 20:52
Sunday, May 03, 2009 at 20:52
Graham
Runing on the highway empty (2.5 ton)
mine will sit on about 325deg
Coming back from last gathering with camper gave it a good squirt and sat on 140kmh just to see what the temps would do and they sat on about 480 deg. So it all runs pretty cool in the exhaust which is good.
Disclaimer :- I dont normally travel that fast :)
Ross
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Follow Up By: Member - Tony & Julie (Malanda - Monday, May 04, 2009 at 06:40
Monday, May 04, 2009 at 06:40
Ross - Towing at 140k - Wow! I would suggest a disclaimer is worthless :-). Maybe a confession on line like this is an admission of speeding and a fine is on the way :-). I would have left out the 140k and stuck with a good squirt. Best of luck - Cheers Tony
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