turbo

Submitted: Friday, Feb 24, 2017 at 10:37
ThreadID: 134351 Views:3490 Replies:7 FollowUps:13
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does anybody no about turbos some say they use more fuel and some say the don't
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Reply By: Ross M - Friday, Feb 24, 2017 at 10:46

Friday, Feb 24, 2017 at 10:46
Turbos don't use fuel, all they do is pump air into cylinders. That extra air has the capacity to burn more fuel but used normally a turboed engine is more economical, unless you use the additional power/torque.
AnswerID: 608855

Reply By: Gundarooster - Friday, Feb 24, 2017 at 10:48

Friday, Feb 24, 2017 at 10:48
Of course they use more fuel!

Turbo's compress the air fuel mixture so you cram more of both into the combustion chamber to produce more power.

Intercoolers cool the air to make it denser so you cram more of both into the combustion chamber to produce even more power.

But in both cases you are forcing more fuel into the engine.

Gazza
AnswerID: 608856

Follow Up By: Malcom M - Friday, Feb 24, 2017 at 10:56

Friday, Feb 24, 2017 at 10:56
Not entirely. Depends on how you drive the vehicle.
A 3 ton truck with a 1 liter non turbo'd engine will be so under powered that you will have your foot flat to the floor pushing as much fuel into the engine as possible.
Add the turbo and the engine becomes much more responsive that you do not always need you foot flat to the floor hence potentially some fuel saving.
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Follow Up By: john m85 - Friday, Feb 24, 2017 at 11:28

Friday, Feb 24, 2017 at 11:28
thanks just a question if you were to do a non turbo motor up would you put a turbo on I have a hj60 and the motor needs doing
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Follow Up By: Neil & Pauline - Friday, Feb 24, 2017 at 12:11

Friday, Feb 24, 2017 at 12:11
All depends if petrol or diesel and if you are using all the extra power. A turbo on a diesel motor just puts air into the cylinder, fuel goes via injectors. Result a bigger percentage of fuel is burnt and less pushed out exhaust.
Neil
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Follow Up By: Gundarooster - Friday, Feb 24, 2017 at 12:12

Friday, Feb 24, 2017 at 12:12
Son just bought an 80 series Diesel with after market Turbo, goes well but overfueling under acceleration (black smoke) mechanic tells us that it will need an expensive injector pump mod to fix it but OK as is other than using a bit more fuel than optimum.
Gazza
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Follow Up By: RMD - Friday, Feb 24, 2017 at 12:21

Friday, Feb 24, 2017 at 12:21
Gazza
In the case of a diesel, the turbo does not compress the fuel air mix.
ONLY air is pressurized into the cylinder by turbo action and then compression ratio does the full application of pressure to the air. Only after that, ie, during top of compression stroke, is FUEL injected into the hot compressed air. It depends on how much fuel you inject as to what power and economy you get.
Because the air is more dense than naturally aspirated, there is MORE oxygen to ensure a better burn and more efficient burn and therefore more power for the SAME amount of fuel.
That IS why trucks use turbo's. We do too and our vehicles are more efficient than previous vehicles doing the same work.
Because of the additional air and possible fuel injectable amount, the engine therefore has the ability to use more air AND fuel but normally does not.
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Follow Up By: RMD - Friday, Feb 24, 2017 at 14:36

Friday, Feb 24, 2017 at 14:36
GAZZA
In the case of your sons 80 series aftermarket turbo.
IF it smokes much at all the pump probably isn't the issue, it is the delivery of fuel into the cylinder BEFORE the turbo has had time to accelerate and begin making sufficient boost air for the fuel being injected at that moment/s.
ALL good installations have a BOOST COMPENSATOR which holds back excessive injection amounts, ie, limiting pump delivery UNTIL the it sees boost has been created. On any vehcile petrol or diesel there is an instantaneous increase of fuel delivery.
If it is smoking like a Navara does then the 80 is not set up correctly.
Navaras just smoke excessively from the factory. Looks good to the mates following. They know you have floored it. After the smoke clears they can see again.
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Follow Up By: 9900Eagle - Saturday, Feb 25, 2017 at 04:42

Saturday, Feb 25, 2017 at 04:42
john m85, quote. "thanks just a question if you were to do a non turbo motor up would you put a turbo on I have a hj60 and the motor needs doing"
If you wish to spend dollars on your 60 series, I would be trying to find a 12ht engine and do that up. It was an excellent engine that had no problems and delivered reasonable power.
Some of the old 2h engines tended to overheat when fitted with a turbo. Some went well and some didn't.
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Follow Up By: Batt's - Sunday, Feb 26, 2017 at 19:36

Sunday, Feb 26, 2017 at 19:36
john m85 if you do the motor up I would ask the mechanic or who ever is rebuilding it what parts might need up grading to suit a turbo so it is done right also the radiator might need to be replaced for a larger one and possibly a heavy duty clutch.
I use to have a 2h it went ok then fitted extractors, exhaust made it better I use to get around 12 - 13 lph on average. I also had a 1986 HJ61 sahara 12ht turbo high roof it went well used around 11.5 - 12 lph on average and they came out of the factory approx 270 kg heavier. I changed a couple of more things over time larger exhaust K&N air filter etc and was getting down to 10.7 lph with 33" tyres.
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Reply By: swampy - Friday, Feb 24, 2017 at 13:12

Friday, Feb 24, 2017 at 13:12
Hi
If the compressions
injector pump
injectors
are not running at there best you will have excessive fuel consumption
Do u service the injectors and pump at no more than 200,oookm ????

If u fit an aftermarket turbo economy may be close to a factory turbo but most likely not the same .
If for eg its an early hilux say 2.4/2.8 with big wheels This combo is just underpowered and eventually pushes oil out the seals . The poor engine is just to overloaded . It does not help the after market kit is pushing way to much pressure to start with .
AnswerID: 608859

Reply By: Athol W1 - Friday, Feb 24, 2017 at 17:10

Friday, Feb 24, 2017 at 17:10
John
Some time back I had a 1980's 2.2 lit Jackaroo that came without a turbo, After a few months I got frustrated with the lack of grunt so fitted a turbo running just 7 lbs of boost.

This vehicle was run a number of times between the Gold Coast and Newcastle, and I can tell you that, provided the maximum speed was kept to within the posted speed limits, the vehicle returned exactly the same fuel figures on that run, however the turbo'd version did that run 2.5 hours quicker than the non turbo as it did not slow down on the hills. It was up to 2 gears better on hills, which translated to up to 60kph better without exceeding the posted speed limit.

The climb north from Bangalow on the highway of the day, when you had to go through the town, would slow the original vehicle to the point where 2nd gear was required, but the turbo'd version saw sufficient performance to require backing off the throttle so as not to exceed the 100km limit.

Regards
Athol
AnswerID: 608864

Reply By: Paul E6 - Saturday, Feb 25, 2017 at 01:55

Saturday, Feb 25, 2017 at 01:55
Good lord, use a spellcheck people.
The more time people spend on the net, the worse it gets it seems.
AnswerID: 608873

Follow Up By: RMD - Saturday, Feb 25, 2017 at 09:52

Saturday, Feb 25, 2017 at 09:52
I went to Claire Voyant to get her to check my spells. None worked, battery in crystal ball flat. Just bad luck all the time. Lord has a "capital" L.
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Follow Up By: TomH - Saturday, Feb 25, 2017 at 10:21

Saturday, Feb 25, 2017 at 10:21
A spell checker wont tell you the difference between "no" and "know" you need to know correct English for that.
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Follow Up By: Griffin - Saturday, Feb 25, 2017 at 11:01

Saturday, Feb 25, 2017 at 11:01
Sometimes. a Full stop, or cap letters.. would aid in comprehension 2.
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Follow Up By: RMD - Saturday, Feb 25, 2017 at 12:29

Saturday, Feb 25, 2017 at 12:29
Griffin
That is punktewashun isn't it?
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Follow Up By: Batt's - Sunday, Feb 26, 2017 at 19:07

Sunday, Feb 26, 2017 at 19:07
When I went to school worse was not considered a word you had to find an alternative.
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Reply By: Sigmund - Saturday, Feb 25, 2017 at 11:20

Saturday, Feb 25, 2017 at 11:20
My 3l TD uses less fuel than my 2.5 injected petrol wagon did. It's also about 40% heavier.

But a litre of diesel has more energy than a litre of ULP I'm told.

It's a two tonne vehicle, unloaded, with less than sleek lines, at a near constant 105 kmh it consumes 8l per 100 kms. Not bad.
AnswerID: 608875

Reply By: Batt's - Sunday, Feb 26, 2017 at 12:48

Sunday, Feb 26, 2017 at 12:48
Overall it should be a little bit better if it's set up correctly because once you settle down from the excitement of buying or fitting a turbo and get back to your usual way of driving you will find you need less throttle to achieve the same or better acceleration than a non turbo and you'll do less gear changes so over all that usually equates to less fuel burn. A non turbo's fuel consumption doesn't vary a lot in general driving beach work, towing etc excluded usually only by a few litres even when driven harder than usual their pretty consistent in their fuel useage.
Now put you foot down in a turbo diesel, yes of course you'll burn more juice which would stand to reason because your launching that heavy brick at a faster rate of knots. I've had 2 non turbo and 3 turbo diesel 4WD's, the turbo diesel are nicer to drive as in ease of getting to hwy speeds faster maintaining hwy speeds there safer when overtaking vehicles quite often it can be done it can be done in 5th gear and there better in hilly areas.
With a non turbo you can improve their power, econ by fitting extractors and a larger exhaust you can feel the exhaust system/extractors wanting to make the engine rev easier and draw you up to the required speed so again less throttle required than you use to use which is a nice and a less complicated improvement but they still won't keep up with a turbo.
AnswerID: 608907

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