Superchips claims for turbo diesel consumption
Discussion
I am considering having my fairly new Renault Trafic Sport van 're-mapped' by Superchips. I have been carefully monitoring the fuel consumption over the year I've had the van and over a 1 month to 3 month period the van has averaged 37.8 MPG throughout the year. I have sent a few e-mails to Superchips asking if anyone else has this type of van with the trip computer and what the increase in the MPG is. I know the improvement in performance is obvious but I'm more interested in the side issue of better fuel consumption. So does anyone with this type of van have any feedback on this £400 re-map?
Lets say you get 10% better economy with the chip (37.8 increases to 41.6 mpg), so with fuel at £1.35 a litre (£6.13 a Gallon), every 1000miles you drove would save you £14.74. So to just break even you would need to do 27,100 miles..........
(and thats assume you got 10% which in reality is almost certainly unlikely)
(and of course, by just driving in a more economical fashion you could almost certianly get the same 10% for free......... ;-)
(and thats assume you got 10% which in reality is almost certainly unlikely)
(and of course, by just driving in a more economical fashion you could almost certianly get the same 10% for free......... ;-)
Ask them if they increase the fuel pressure as part of the remap. This is a common way of increasing the power/torque (and the amount of soot coming out the back).
It also has the effect of injecting more fuel for the same duty cycle.
This means the ecu believes it has injected x amount of fuel when really it's x + 10%. The fuel computer works out your mpg based on what it thinks it's used rather then what its really used.
If you don't use a fuel computer but work it out based miles/fuel used then you should be able to see the real results.
It also has the effect of injecting more fuel for the same duty cycle.
This means the ecu believes it has injected x amount of fuel when really it's x + 10%. The fuel computer works out your mpg based on what it thinks it's used rather then what its really used.
If you don't use a fuel computer but work it out based miles/fuel used then you should be able to see the real results.
Geez, those figures are good, we've got a big Transit at work (LWB, high roofed but single axle) and it never tops 27mpg on a motorway run.
Granted that's at 80mph, but still, I'm impressed that any van in that sort of class can return mid-30s!
I like to think the Transit is the driver's choice though, if you catch a corner just right and on boost in 2nd it's possible to get the back end out, with a remap it would be great. Do it
Granted that's at 80mph, but still, I'm impressed that any van in that sort of class can return mid-30s!
I like to think the Transit is the driver's choice though, if you catch a corner just right and on boost in 2nd it's possible to get the back end out, with a remap it would be great. Do it
I've done the fuel consumption check by filling it right up and setting the trip guage and over a couple of months it worked out more or less exactly what the consumption recorded on the trip computer i.e. 37 plus MPG. Are you saying that the trip computer can be fooled by a re-map? if so thats a bit worrying.
As an owner driver I had a MWB Medium roof Transit since new before the Renault, not sure about the new Transit but the Renault is like driving a car compared to the Transit it replaced.
I am hoping to hear from Superchips later this week so I will be putting the idea of it fooling the trip computer to them.
As an owner driver I had a MWB Medium roof Transit since new before the Renault, not sure about the new Transit but the Renault is like driving a car compared to the Transit it replaced.
I am hoping to hear from Superchips later this week so I will be putting the idea of it fooling the trip computer to them.
I've also been tolk by my mechanic to check the fuel consumption manually and to not trust the board computer. After chipping, the consumption could be measured wrong. Also, the mechanic advised me against chip tuning my car because the temperatures around the turbine would be much higher (+ 200 C) and thus could create problems in the long run.
So, if you want to have a few more ponies then do it, otherwise don't bother.
So, if you want to have a few more ponies then do it, otherwise don't bother.
Blue Oval84 said:
I like to think the Transit is the driver's choice though, if you catch a corner just right and on boost in 2nd it's possible to get the back end out, with a remap it would be great. Do it
That's what I thought, until I discovered on a wet roundabout that the one I hired was FWDWhat a waste!
Hi RX7 said:
Are you saying that the trip computer can be fooled by a re-map? if so thats a bit worrying.
Yes, that's exactly what I'm saying.The accuracy of trip computers can be suspect at best however increasing the fuel pressure can give you a relative improvement (as measured by the ecu) as more fuel is being used than the car is aware of.
Work it out for yourself and you'll have the real figures.
Well I've taken the plunge and decided on the Superchips re-map for this Monday. The company has answered all my questions in a way that has satisfied me so feel I have to at least do the trial period. I'll be doing an MPG test from day one both filling up and by the trip guage as both have been dead accurate to date. I hope I don't get black smoke out the exhaust as a number of people have said because it does not smoke at all at the moment.
Playsatan said:
Hi RX7 said:
Are you saying that the trip computer can be fooled by a re-map? if so thats a bit worrying.
Yes, that's exactly what I'm saying.The accuracy of trip computers can be suspect at best however increasing the fuel pressure can give you a relative improvement (as measured by the ecu) as more fuel is being used than the car is aware of.
Work it out for yourself and you'll have the real figures.
Get your facts straight.The trip computer absolutely WILL NOT be fooled by a remap. A tuning box which does not 'talk' to the ECU will mean the trip computer reads wrong, but a remap is written direct to the ECU. The ECU knows exactly how much fuel is being injected and the accuracy will be exactly as it was before the remap.
parapaul said:
Get your facts straight.The trip computer absolutely WILL NOT be fooled by a remap. A tuning box which does not 'talk' to the ECU will mean the trip computer reads wrong, but a remap is written direct to the ECU. The ECU knows exactly how much fuel is being injected and the accuracy will be exactly as it was before the remap.
Blue Oval84 said:
Geez, those figures are good, we've got a big Transit at work (LWB, high roofed but single axle) and it never tops 27mpg on a motorway run.
Granted that's at 80mph, but still, I'm impressed that any van in that sort of class can return mid-30s!
I like to think the Transit is the driver's choice though, if you catch a corner just right and on boost in 2nd it's possible to get the back end out, with a remap it would be great. Do it
We've hired a Transit lwb high roof and a SWB low roof, both 115 engine I believe. High roof got 21 mpg average (although it did only have 200 miles on it, and probably averaged 80-90 where it could) and the swb with 1000 miles on it averaged 33mpg, similar driving and the same load. We were pretty surprised by the difference, not sure whether it was due to the lwb being such a new engine or the air resistance the high roof created.Granted that's at 80mph, but still, I'm impressed that any van in that sort of class can return mid-30s!
I like to think the Transit is the driver's choice though, if you catch a corner just right and on boost in 2nd it's possible to get the back end out, with a remap it would be great. Do it
parapaul said:
Get your facts straight.The trip computer absolutely WILL NOT be fooled by a remap. A tuning box which does not 'talk' to the ECU will mean the trip computer reads wrong, but a remap is written direct to the ECU. The ECU knows exactly how much fuel is being injected and the accuracy will be exactly as it was before the remap.
parapaul said:
Playsatan said:
Hi RX7 said:
Are you saying that the trip computer can be fooled by a re-map? if so thats a bit worrying.
Yes, that's exactly what I'm saying.The accuracy of trip computers can be suspect at best however increasing the fuel pressure can give you a relative improvement (as measured by the ecu) as more fuel is being used than the car is aware of.
Work it out for yourself and you'll have the real figures.
Get your facts straight.The trip computer absolutely WILL NOT be fooled by a remap. A tuning box which does not 'talk' to the ECU will mean the trip computer reads wrong, but a remap is written direct to the ECU. The ECU knows exactly how much fuel is being injected and the accuracy will be exactly as it was before the remap.
magpies said:
with the speedo being (up to) 10% reading high - as they are supposed to!! is the odometer equally out? I've never checked, but with satnav it can be checked. Then do the manual fill to brim and run and refill
That way you have checked the accuracy
I know on my car, the car knows its exact speed at all times (using the onboard diagnostics). It then applies the over-read to the display on the speedo - the odo reading is dead on accurate.That way you have checked the accuracy
parapaul said:
Get your facts straight.The trip computer absolutely WILL NOT be fooled by a remap. A tuning box which does not 'talk' to the ECU will mean the trip computer reads wrong, but a remap is written direct to the ECU. The ECU knows exactly how much fuel is being injected and the accuracy will be exactly as it was before the remap.
You are in the business I take it?
Max_Torque said:
Lets say you get 10% better economy with the chip (37.8 increases to 41.6 mpg), so with fuel at £1.35 a litre (£6.13 a Gallon), every 1000miles you drove would save you £14.74. So to just break even you would need to do 27,100 miles..........
(and thats assume you got 10% which in reality is almost certainly unlikely)
(and of course, by just driving in a more economical fashion you could almost certianly get the same 10% for free......... ;-)
wow well calculated man hats off o you.(and thats assume you got 10% which in reality is almost certainly unlikely)
(and of course, by just driving in a more economical fashion you could almost certianly get the same 10% for free......... ;-)
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