Maybe this explains why our cars are prone to burn oil...

http://www.mototuneusa.com/break_in_secrets.htm

Do you believe it?


[Modified by nEoMuGen, 1:55 AM 3/24/2003]


[Modified by nEoMuGen, 9:57 AM 3/24/2003]

 

Interesting...


[Modified by ITRbroham, 11:09 PM 3/23/2003]

 

talk to 10 different engine builders and get 10 different answers....no one really knows and thats the truth

for instance, sgT breaks in his motors really quick...i remember him saying if it makes it through the first 10 mins with him driving hard, its gonna work

people break in the endyn way as well..other people suggest a 2000 mile break in and still some say 5000 miles before you hit the dyno

i broke my last motor in with 500 street miles and then did approx 15 dyno runs. doesnt smoke and burns about a quart per oil change which is common

 

I second that, interesting!

 

just rev it at 3k for 30 min with napa 30 wt oil and stop when the smoke clears

THAT S WHAT AEBS SAID


[Modified by JDMPARTS4U, 1:21 AM 3/24/2003]

 

LMAO !!!!
Yeah, I get my new car and redline it `til gas runs out...

In fact:
Nobody gets a 0km car... It has always been driven from one dealer to the other or it has been test-droven by a hippie...
Those runs are done by people who don`t care for the car... Punks that beat the **** out of the cars, don`t matter if they`re new...

Almost every car you buy from a dealer might be seriously hurt by a dealers employee during the "first 20 miles"... or might be broken in correct.. Depends on if you believe the articles author.

I speak for the European market.. Maybe you US-guys by cars with 0 miles on the odo.

 

US is the same as Europe. Pretty much all cars have some mileage on them since dealers don't always place their inventory on the lot. They store them a few miles away inorder to keep costs down.

 

Good read.

 

Last race motor that we built for own race car was broken in on the dyno. It was fully warmed up, did a couple half throttle runs. Then dynoed like any other engine. Me personally i will not run the car to 100% for at least 250 miles, but i will get on it 1K or so short of redline. However the 1000 mile or 500 mile myth in waiting to go over 4K rpm's or whatever that i've heard before seems a little extreme to me.

I look at it this way, Top Fuel cars rebuild the engine pretty much after every run, obviously its making power when it runs down the track and not being run on hardly at all before getting full throttle. Then of course those engines aren't designed to last.

 

It's what I've said all along. I broke my last 4 DOHC VTECs the exact same way with nothung but good results.

 

What does good result mean? The article claims that if you do it the progressive/aggressive way, you will have more hp, better sealed rings and finer shaped pistons. Maybe this is how some of us got the "Wednesday Motor"...I also posted this thread in the Tech form and hopfully some mechanics should give some point outs.

From Hasting, the piston manufacturer:

http://www.hastingsmfg.com/Service%2..._procedure.htm
_______

 

"There's a very small window of opportunity to get the rings to seal really well ... the first 20 miles !! "

Anyone know how long our engines are run at the plant before being put in our cars? I would assume it would be more than 20 minutes which would mean we couldn't use this technique even if we wanted to.





[Modified by jond, 10:09 AM 3/24/2003]

 

So true at times, depanding on the tech that actually does the test drive. hell, a few curious salesperson will do the samething.

 

Aaargh !
Thanks for quoting me... my english today is really
Lots of mistakes...

 

I've had 2(93 GS-R and 99 Civic SI) prior DOHC VTECs, one with over 140k(GS-R) mile the other 65k(Civic), never used a drop op of oil and NO engine related failers. My 99 Prelude SH had 80k, and doesn't use a drop of ol. My 00 ITR has 45k, I change the oil every 3k. I put 4.7 quarts in and get 4.5 quarts out. And yes, the cars are driven very hard. All car were driven hard right off the dealer's lot.

 

what about whp wise?

 

I would think it depends on the ring material...you would obviously use softer rings ina race engine because your not going to break it in at all. It's all relative...The v8 guys use a blowby meter, and as soon as they sense theres no blowby, they give it hell.

Suprdave

 

i heard from the sales guy i bought my R from that Honda runs all their engines for a couple hours straight before even putting them into a vehicle. BUT we all know how much we can trust words coming out of a saleman's mouth

 

Before finishing my EE degree, I worked for a Honda motorcycle. I was told by the district sales rep that Honda would pull a motor off the end assembly line after every 10(if I remember corretly) motors built. these engines would be run at redline in top gear for x amount of hours. These motors would not be installed in vehicles. It's just a quality audit. It would be impossible, not to mention outrageously expensive, for Honda to run every engine built. You'd be paying alot more for the car if they ran every engine. Think about it logically. Let's say Honda builds 500,000 engines a year. That's 1,000,000 hors of straight test time. There are 8760 hours in a year. If Honda ran 24 hours a day, hey would need to be running 115 engines at all times. Not very likely. That doesn't even include set up time.

 

Just to add something here, I visited the Ferrari of Washington race shop on saturday. They send their motors back to Ferrari to be rebuilt. Ferrari runs them on a dyno for 4 hours to help seat the motor. After that, the engine takes about 800k-1000k to be full broken in, and make the most power.

 

I can't see the article being any different than for cars....

I don't figure this is a accurate real world representation and *gasp* blasphemy it doesn't involve Type-Rs....

Friends use to own two 98 Preludes respectively and one guy (example 1) didn't even redline his engine till 6000kms after he owned it brand new. Always religiously warmed it up till the revs dropped out of fast idle in the morning.

The other guy (example 2) followed what he heard from various sources and deduced that he would just drive the car easy varying the rpms for the 1st 2000kms and then let hell loose. I even remember helping him break in his car driving on the highway for the entire night varying rpms.....

In short, in example 1, his car burned quite a bit of oil and smoked a lot during accel decel despite how "well" he treated the car.

Funny but they both ended up at the drag strip before they respectively sold their rides.... example 1 had I/H/E + VAFC and no matter what we did.... it couldn't run any faster than example 2's car which was 100% STOCK.

if numbers are everything.... car that had all the mods did a best of 15.2....

stock car did 15.03

modded car had a consitently better 60ft....

stock car had a 2.4 60ft.

Despite what I witnessed here and what I've read....I'm still hesitant to try this break in procedure on the motor I am building.... but what the hell.... ya live once....

 

I used to work at Acura and I loved to TQI cars. It was fun to test drive them. We would just rail the **** out of the new cars. I still think the NSX is more fun then the Type R's. Yeah yeah i know they are not comparable but still fun to try. No cars that we sold that I have worked on seem to ever have any major or minor for that matter problems. I say drive it like you stole it.

 

you have to figure that everyone who is giving you these long drawn out recommendations for break in are manufactuer's or assemblers of engines and engine parts. they are doing this for one reason. LIABILITY. They are all just trying to protect there as that something might go wrong during the first few months or miles of ownership and want to be able to ask. "Did you break the engine in properly?" knowing 50% of people will say.. whats that mean? and automatically displace blame.

 

I beat the **** out of my car(s) new, old, broken, running good, whatever. fact is if its gonna break its gonna break. and chances are good its gonna break. after rebuilding my motor, with 0 miles on it, I dynoed the hell out of it without even taking it on the street. 20 back to back runs. was that wrong of me? so far it has worked out great with great power. if its put together well, it should perform well. how someone can say something like "run it half throttle for 20-30min, let it cool for 30min, run it some more harder this time, then let it cool again" or whatever, is very skeptical in my opinion. no two motors are the same, even if they have the same parts. so how this person or any can come up with any real tried and true equation is mostly BS if you ask me. just 2 cents from my very skeptical mind