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|12th March 2006, 23:59||#46|
Join Date: Feb 2004
Location: NYC / BOM
Thanked: 1,324 Times
Mototune USA - crap/fact?
surprisingly, no other individual or corporation mentions, practices or recommends the break-in procedures indicated by MotoMan.
all his testing is done on 4 stroke air cooled engines used in motorcycles, snow-mobiles & lawn mowers. these are engines on which his break-in procedures "could" actually work. on oil cooled engines, the procedures are doubtful.
maybe, race car tuners would appreciate and use such harsh break-in procedures as race engines aren't meant to have a long reliable existence - their only purpose during their life-cycle is to provide maximum performance in the smallest amount of time. these engines aren't required to provide a life-time existence of more than a 1,00,000 miles or provide 30 miles to the gallon of fuel (~ 13km/l).
in fact there is an article on this in the current issue of Motor Trend which discusses certain negative aspects of what Mototune USA professes. i will try to scan and post it later on.
i don't think there is a conspiracy by any automobile manufacturer (or a group), to provide only limited break-in information to end-users so that their vehicles do not have a long-life.....
Last edited by aah78 : 13th March 2006 at 00:04. Reason: modifying content
|10th July 2006, 15:40||#47|
Join Date: Dec 2005
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New Innova - run-in period
I got my new Innova-G4 delivered last Monday. This is my first diesel vehicle, currently I own an Alto. I have few questions about the run-in period
1. Is there a run-in period for the latest diesel engines, I couldn't find any mention in the manual, the only thing i read is not to break/stop the vehicle abruptly for the first 300 kms. Any way I am maintaining the rpm below 3000, and trying my best not to break abruptly in Bangalore traffic
2. Is it better to do more of highway drives than city drives initially for the engine to set in properly
3. Is it required to idle before you start / stop moving the vehicle.
I will publish a detailed report once I put in some miles, currently just driving to office and back home.
|10th July 2006, 16:24||#48|
Join Date: Feb 2004
Thanked: 18,103 Times
There is also another thread stating how and why turbocharged cars need to be idled for about a minute after being turned on and before being turned off.
Please post in the correct section and do a search before posting a new thread.
|24th July 2006, 00:59||#49|
Join Date: Jun 2006
Thanked: 9 Times
I Have a Swift ZXi. I live in mumbai. I bought my car in March, and till date its clocked about +5k km's already!!.
This is the first time I read this post and thought would contribute my experience to this thread.
I just returned from another long trip this weekend, driving to and from hyderabad.
For the first ~250 km I drove sort of normally and as aggressive I could be to survive mumbai traffic I had to go to hyderabad urgently then and decided to drive down instead of flying. I did a almost nonstop drive to Hyderabad overnight which I did in about 12~13 hours (720 km to hyderabad). In the first drive I couldn't push the car above 100kmph (i was a bit concerned about blowing the head too ) but i did average about ~80-90 kmph at the time. Since it was a night drive i dint have much traffic and it was a breeze. In fact I was pleased to have opted for ZXi with ABS as it did save my *** when negotiating a oncoming train of trucks, a trucker thought he could just negotiate an overtake when a car was hurtling at him at 100!! I hit the breaks hard at the time as i dint have a lot of place to negotiate along with blinking lights et al. In the hard braking, the brake pedal juddered as I safely negotiated away from a head-on!! (Had to stop immediately afterwards to calm my nerves and run down the excess adrenaline in my blood after that!!).
I checked the mileage turned out to be 17~18 kmpl in that trip.
Definitely after my return, i started to feel guilty of having pushed my car so hard for a long haul, but i did see perceptible difference in the car. In fact I am getting about 9~12kmpl depending on the day/traffic in city conditions. Although this i think is acceptable owing to the fact that the climate control is on all the time at ~23-25 In fact, the initial 250km were strained and I was wondering of where all the horses were!! But now the car is definitely more smoother and more responsive!!
This time, however after my second service (Got a second service + an oil change and filter change at my expense), I decided to drive again. Whoo boy was it a pleasure drive!! The car would sweep across 100 easily and I hit 140 kmph on the expressway with room to push it for little more at the pedal!! I made it to hyderabad in 11 hours, and return i made it in 10 (actually 9hrs 40 minutes i was in Vashi)!!!
On the onward, it fetched me ~16-17 kmpl with climate control on 70% times, and return fetched me ~19-20 kmpl with 30% climate control (had to use it to defog the windshield in the rains!!) Thats simply amazing!!
I think although what MotoTune says is controversial, there is some truth in it. I dont agree factory engines need to be run-in so carefully as much as a rebuilt engine needs. In fact for a new factory engine always comes with enough clearances already set (imagine the number of siezed engines manufacturers would be fixing otherwise!!). However when the engine is rebuilt and pistons changed to oversize, the reboring is done for closer tolerances and needs more time to build back the running clearances.
In my college days I owned a Kawasaki RTZ, which I used to fool around with. I overhauled the complete engine nearly 3 times with my own hands in those days. It was notorious for seizures at high speeds!! I replaced the bore and piston and run-in needed then was lesser. It lasted longer (abt an year before the first siezure as the oil pump failed!!). Then i got a reboring done and had to do what they call as "Cooling": which is to leave the engine running for few litres of gas for the breaking in.
I trust MotoTune is ok with the idea of setting the piston rings, but I dont think there is a clear quantifiable method for this to be done without wrecking your engine for a layman as well. Thats the reason why manufacturers recommend a more conservative approach for running-in. For the moto-holics, yes the new car needs to be run-in a bit more aggressively.
From my experience, the first 250~300 km is the break-in period, and after that the run-in period starts where in you let the engine open up well.
As for my Swift, I luv it!!
|14th September 2006, 06:30||#50|
Senior - BHPian
Join Date: Jan 2006
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Is it better to avoid 100% AC usage before the run-in period since it will increase the load on the engine ?
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