Is it possible to turn off the turbo via a controller?

[Steely]

Just crossed my mind yesterday driving back from hull,
i managed a resectable 38-39 mpg sat at a good 68-70,

the question i have is there anyway you can plumb say something like a boost controller to actually stop the actuator opening so its practically running as an N/A Engine,

im doing a lot more travelling due too a new missus, and i cant bring myself to buy a diesel, i want to keep the 20vt, and to see if i can increase the mpg even more

cheers people!

 

[karlw]

no not really even if you had something good like an avcr switching it off will still let it run to standard pressure usually set by the actuator

 

[LEE69]

Yes it's called your right foot, just don't don't press it to the floor so hard

 

[Steely]

Yes it's called your right foot, just don't don't press it to the floor so hard

haha tried that one, my right foots made of lead,

 

[DPJ]

Seriously - fit a boost gauge and then drive off boost all the time.

 

[LEE69]

You got a boost gauge fitted?
If not get one and drive by it should increase the mpg loads tbh, bloody boring though (yes i have tried it)

 

[Steely]

True seems a better way, boost gauge it is then,

 

[Gubien]

You could also sell the Cupra R and buy a fiat multipla instead

 

[ibizacupra]

Just crossed my mind yesterday driving back from hull,
i managed a resectable 38-39 mpg sat at a good 68-70,

the question i have is there anyway you can plumb say something like a boost controller to actually stop the actuator opening so its practically running as an N/A Engine,

im doing a lot more travelling due too a new missus, and i cant bring myself to buy a diesel, i want to keep the 20vt, and to see if i can increase the mpg even more

cheers people!

stopping actuator opening will give you uncontrolled boost, so thats not what to do
electrically disconnect n75 and you will run maximum 5-7psi boost which is very little.
OR
learn throttle control

 

[ibizacupra]

haha tried that one, my right foots made of lead,

brick under accelerator pedal then
Or
fit drawing pins, pointy side outward onto the pedal and drive barefoot.

 

[DannyC87]

put an electronic solenoid in parallel with the n75; when you don't want boost turn it on so it lets boost straight to the actuator - this will give you around 6psi max boost; then when you want boost, turn it off, boost goes back to n75 control.

The 6mm variety of this is what I use (it is not listed atm):

http://cgi.ebay.co.uk/Solenoid-Valv...arParts_SM?hash=item4cee34451e#ht_2062wt_1165

I use this setup to cut my boost when I run out of water/meth to avoid doing engine damage.

 

[Willie]

Learn right foot control, I've managed 42.5 MPG over a full tank so it's possible

 

[Muttley]

Turbocharger improves engine efficiency, by increasing the compression ratio (to summarise drastically). Driving "off boost" is not the answer, driving economically is.

Accelerate just enough to be secure (get away from full stops smartly, overtake safely) don't cane it every time, that will drink fuel down. On long runs, choose a speed and stick to it. 70 is *much* better than 80 for economy, and will get you there in practically the same time (traffic dictates your point-to-point speed much more than you'd like to think). Above 80 (should you choose to go there: don't tell us about it) will really cane your economy. Look further ahead, anticipate the traffic speeds and gaps and use engine braking rather than the footbrake.

At the end of the day, you're using a sports car as a daily driver. Don't expect too much, but you need more than one style of driving.

 

[leon cupra r]

stopping actuator opening will give you uncontrolled boost, so thats not what to do
electrically disconnect n75 and you will run maximum 5-7psi boost which is very little.
OR
learn throttle control

Just tried that with the N75, I actually really liked it for a change! nice and smooth, dont have to be so careful what you're doing with your right foot! It would be nice to do along the lines of what you were saying Danny about having a switch installed to essentially turn the boost up and down... do you need one of those solenoids or can you just literally wire a switch into one of the cables leading to the N75?

I Guess what I'm also asking here is, will you get the dreaded EML leaving the N75 unplugged?

Also, economy wise, will it reduce the MPG as the ECU will have one less control parameter for the engine? I noticed that on the trip computer at least, the MPG is better - floored in third I'm seeing a lowest value of 7 as opposed to 5 now....

 

[Steely]

Turbocharger improves engine efficiency, by increasing the compression ratio (to summarise drastically). Driving "off boost" is not the answer, driving economically is.

Accelerate just enough to be secure (get away from full stops smartly, overtake safely) don't cane it every time, that will drink fuel down. On long runs, choose a speed and stick to it. 70 is *much* better than 80 for economy, and will get you there in practically the same time (traffic dictates your point-to-point speed much more than you'd like to think). Above 80 (should you choose to go there: don't tell us about it) will really cane your economy. Look further ahead, anticipate the traffic speeds and gaps and use engine braking rather than the footbrake.

At the end of the day, you're using a sports car as a daily driver. Don't expect too much, but you need more than one style of driving.

dont get me wrong, im not complaining, at 39mpg from a 1.8t i think thats respectable, i was just seeing if it was possible to up it by another 5-10mpg, everyone knows the use of the turbo just guzzles fuel, and no the leon isnt a daily driver, i have the trusty transit for that,

a 90 mile trip to hull and back is costing about 20 quid a chuck, even to bring that down by a couple of quid, it'd make all the difference,

The cupras staying, it wouldnt look too good picking up the OH in a pikey chariot,

The heavy right foot situ, i cant really help, its not the speed that gets me smiling, its the acceleration, thats where i struggle!

 

[Muttley]

Steely wrote

dont get me wrong, im not complaining, at 39mpg from a 1.8t i think thats respectable, i was just seeing if it was possible to up it by another 5-10mpg, everyone knows the use of the turbo just guzzles fuel, and no the leon isnt a daily driver, i have the trusty transit for that,

Well, as usual, what everybody knows isn't completely right: Use the turbo in a different way and you can get good economy too. Although I think that 39mpg is going to be hard to beat without letting a lot of people overtake you

Some tuners do switchable maps, I think, selectable from the dashboard. You could always get an "economy" map, and switch it out when you feel like a bit of fun

a 90 mile trip to hull and back is costing about 20 quid a chuck, even to bring that down by a couple of quid, it'd make all the difference,

Presently I'm commuting 90 miles each way, round the bottom half of the M25, four days a week. Hire car and fuel on expenses, and it's only for six months, or I'd not stomach it. Getting 42-45mpg out of a Peugeot 207SW with a 95bhp 1.4 engine, faintly ridiculous little sewing machine. It's OK, but you've got to keep the revs up, or it has no go at all - not very "driveable"... That's what I like about my boring diesel, decent power from low down, easy to drive in the town.

The cupras staying, it wouldnt look too good picking up the OH in a pikey chariot,

The heavy right foot situ, i cant really help, its not the speed that gets me smiling, its the acceleration, thats where i struggle!

Ah, yes, it does bring a smile to the face, doesn't it. I remember how I felt after trying a Mk.1 Golf GTI for the first time - silly grins all round . Bought it, and followed it with a Mk.2. Both stolen from me

 

[Dyscontinued]

I don't understand why a turbo would make the fuel consumption more, from what I understand all a turbo does is use exhaust (so waste) gas to turn a turbine which compresses air and to increase the o2 content hence making more efficient combustion.

no?

 

[DPJ]

I don't understand why a turbo would make the fuel consumption more, from what I understand all a turbo does is use exhaust (so waste) gas to turn a turbine which compresses air and to increase the o2 content hence making more efficient combustion.

no?

More air going in = more fuel going in (as air fuel ratio stays 'roughly' the same.

 

[andycupra]

Turbocharger improves engine efficiency, by increasing the compression ratio (to summarise drastically). Driving "off boost" is not the answer, driving economically is.

I think you are missunderstanding or incorrectly applying the theory that turbos can increase efficiency.

 

[andycupra]

I don't understand why a turbo would make the fuel consumption more, from what I understand all a turbo does is use exhaust (so waste) gas to turn a turbine which compresses air and to increase the o2 content hence making more efficient combustion.

no?

more air and MORE FUEL... = more power.