Rep Power: 775

hey,

I just got my car back. We put in a LS-Vtec with GSR internals. All the internals are brandnew, so im wondering how i should treat the break-in period.

Everybody is telling me something different, and im not expert, so i really want to know what the best way to do this is...

Thanks!

Johan

 
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Do not drive on the highway. Do alot of city driving and always keep the revs going up and down. Dont travel at a constant speed. This will ensure that the rings seat correctly. In the first 1000 miles (1500ish kms) you are going to have to change your oil about 4 times or so.

Some people will tell you to be easy on the engine when you break it in, some will say push it hard as soon as you bring it out. Depending on what you plan on doing with the car/engine, it matters which way you break the engine in.

One good thing to do before you even drive it is turn it on and let the engine reach operating temperatue, and then shut it off and let it completely cool down. Repeat this about 3 times.

Personally, I would drive it a bit carefull for the first 50-100 kms and then do some mild 3rd and 4th gear pulls, dont bring it to redline just yet. Slowly work your way up to redline over a week or so.

I am sure alot of people will tell you to be easy on the engine durring the break in period, but....go call up ferrari or lambourghini and ask them how they break there engines in.

Good luck.

 
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^ And neone who tells u different....Is Lying....Is Lying.....Is Lying

 
Rep Power: 775

cool, so here's the problem. I go to school 45 minutes away from my house. I almost have to take the highway...would it help if i go lets say 110 for 2 minutes, speed up to 120, then slow down to 100....etc?

thanks for your help!

Johan

 
Rep Power: 780

blackout is absolutely rigth, i did the same process with my ls vtec and had no problems like he said just let the car run a couple of times and definately do an oil change within the first 300 kms-- good luck yo seeu on the streets!!

 
Rep Power: 779

You could do it any old way you want but if you made a slight error when building the engine it will still break in the end, I rebuilt my Z24's engine a couple years ago and I went to Bancroft a weekend after I finished building it and maybe drove about a hundred to three hundred Km around Toronto before flying up there this was in November aswell for the Tallpines rally. Aslong as you crosshatch the cylinder walls the rings should seat pretty nicly.

 
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Yup, on mine and Mark's engine within the first 100km's the engine saw boost.

 
Rep Power: 780

This recommendation goes against what everyone is saying:

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

This method seems to be the one most high horsepower cars have adopted.

 
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doesnt it matter that that was for motorbikes??

Also, i already put 200k's on the car since i got it back....

Johan

 
Rep Power: 777

Title of Website:

"How to break in new motorcycle AND Car engines for more power"


so i guess not... website does make sense tho

 
Rep Power: 775

so even though i got 200+ KM's already.....i should "beat" on it???

 
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yes because what is happening is the rings are forming themselves to the cylinder wall basically filing themselves into the grooves the faster you do this the better the compression seal you will attain, i said before most high hosrepower cars use this method because it is very effective, the key is to change your oild very often over the first 1000km. i have built 4 motors since i heard about this method about a year ago and all the motors till today have near perfect compression.

 
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Agreed.

I am at 172psi accross the board, where as most 7M's are 150ish. Since you have already put 200km's on it and no problems, it must have been a good rebuild, so drive it like you stole it.

 
Rep Power: 775

I kinda know the guy that put the motor together and put it in, and i had seen some of his other builds too, so i knew it had to be a good build...

Today were gonna do our first oil change, and a problem with the alternator came up, so we're fixing that too......370KM's so far....

Thanks for all your advise

Johan

 
Rep Power: 776

im rebuilding my motor very soon with new pistons and cams and all new seals so I think im gonna take motomans advice, i think i might wait till atleast putting 50 k on it to change the oil tho