Quote:
Originally Posted by Redex Hi,
I work 4 months in a garage, 4 months farming and spend 4 months in India. I am 65 and should be retired but cannot give up !!!!
I have 5 vehicles including a 17 year Ford Focus 1.8TDDI diesel, in the U.K. This version of diesel engine has been around for about 30 years !!! I have never bothered with re-mapping or chipping as I believe the best solution is just to buy a car with a bigger engine. However older inter-cooled turbo diesels have more scope for improvement than current models. Current diesels have much less scope as they are already at a fairly high state of tune for the sake of performance and economy, and reduced engine capacity.
My trusty Focus Ghia Estate now has over 240,000 kms on the clock. It spends its life on daily round trips of 160km to and from work. 80% of the time is spent on expressways cruising at about 120kph and 20% on back roads at an average of 40kph.
I have a friend who owns a "re-map" company, and as we are having 2 vehicles re-mapped at our garage I have been offered a "FREE" re-map on my Focus. (Probably an attempt to gain further business, if I find it worthwhile).
My aim is not out and out performance, but to improve the overall economy, as I intend to carry on driving in the same fashion. I am looking to improve the fuel efficiency. I run my car from full to about 80 kms from empty and refill, usually once a week and about 45 litres. I average about 23km/l.
Standard the Focus weighs about 1.8 tonnes, has 89 BHP and 200nm torque. The express way portion (80%) of my diving is at 2,900 rpm/120k/ph. At that engine speed it produces about 78HP and 186nm torque.
I am going to have a custom re-map to optimize torque at 2,900 rpm (about 270nm).
Currently the power is 89HP @ 4,000 rpm, torque is 200nm @ 2,000 rpm.
The 1st stage re-map is 114HP and 256nm maximum.
The 2nd stage re-map is 135HP and 300nm maximum.
The re-map being created is a compromise between stage 1 and stage 2. I have no intention of exceeding 3,000 rpm (130kph in top gear)and will carry on driving as usual. High rpm in a diesel just makes more noise, you generally don't go any faster, just strain the engine.
I will update this post and let you know about economy improvements and any noticeable performance improvements (I will make an exception for this and run the engine to peak HP, which currently is about 4,00rpm, although the torque drops by over 20% at 4,000rpm)
As a famous American once said "It's HP that sells a car, but torque that wins races !!!!)
Regards Neil |
Hi,
8 months and 18,000 kms later, (not been working as much otherwise it would normally be nearer 32,000kms). The Focus suffered typical Bosch VP30 injection pump electronics failure at 244,000kms. Fitted a replacement pump (and treated the engine to a full service, cam and aux belts, water pump, thermostat, alternator, tensioners etc etc), fuel economy remained at 19kml (not the 23kml in the quote above, that was a conversion error from mpg)
Had the opportunity to have a "free" re-map (including delete egr) at 251,000kms.
89 BHP to 120BHP, 200nm Torque to 260nm.
Now at 262,000kms. I have covered approximately 11,000kms with the re-map and averaged an increase in fuel efficiency of approximately 4%. Oddly this is the same increase in efficeincy I got when I tried BP Ultimate Diesel instead of the standard fuel (I always use BP as I have a "free" fuel card).This is over 12 full tanks of diesel.
My driving routine is the same for virtually every trip I make. Same roads, same speeds where possible. Daily round trips of 160km to and from work. 80% of the time is spent on expressways cruising at about 120kph and 20% on back roads at an average of 40kph.
I feel that this is due to the increase in torque (50nm) at my cruising speed (2,900 rpm). I really need a lower final drive ratio to get this down to 2,500rpm but the option is not available. I am stuck with the 5 speed box with the lowest final drive and cannot change it for the later 6 speed in the 1.8tdci version.
Improvements following re-map/egr delete.
1. Better starting
2. Much smoother tick over from cold.
3. Significant improvement in acceleration.
4. Less tendency to labour at low rpm (below 1,500rpm where the turbo
spools up)
5. Less drop off in power over 3,000rpm.(see note below)
6. Better fuel efficeincy, up from 19km/l to 19.8km/l
Note : I don't usually go over 3,000 rpm and generally try to keep the revs between 1,500 and 2,900rpm (the sweet spot for overall performance/efficeincy) when changing up the box. Anyway torque starts to fall away above 2,500rpm.
Once a year I do run the car WOT for 5kms, (I have access to a private circuit), and each time it has always reached 178kmh (exactly as the specs quote!). I consider it a test of the overall condition/reliability of the engine, and a good clear out of junk.
Is it worth it ? Simple answer is yes for the seat of the pants feel, and no if you want to save money, (unless you do the kind of mileage I do). I could recover the cost in less than 2 to 3 years !!!
Stay safe. Hoping to get to India soon for up to 4 months (an escape from our winter). Flights and visas are starting to open up. Then its back to my trusty 8 year old (modified) Suzuki Access 125.