break in time...

jwillburn119 · 03-05-2006, 07:10 PM

i know you guys have done alot of engines... lets see what kind of break-in mileage everyone goes by...????

QWKSNKE · 03-05-2006, 07:39 PM

put 500 miles on my 306 last year before going to the dyno.

After going to the dyno i had to tear the engine back down due to some bearing issues. The next go around it we put the engine in the night and morning before FFW at Commerce last year and drove it the 200 miles there and raced it both days that weekend with no issues other than one of my Cometic head gaskets didn't seal properly

coupe · 03-05-2006, 09:16 PM

The key is (especially the first few miles) to keep RPM and load varied.
ie: run at 2k, then 3500, then maybe 2500, then 3000, etc...occasionally accelerating lightly, lugging car lightly. Do this for a couple hours, then change oil. Drive normal, no hard acceleration, for the next 500 miles. Change oil at least once during that. Then gradually you can start giving it hell if it's lived thus far.

04 Mach1 · 03-05-2006, 10:08 PM

Everyone seems to do it a little different. Its always good to put a couple of hundred miles on the motor before beating on it especially on a everyday driver. Pretty much everything Coupe said, But I always seem I break mine in at the track.

1Quik85GT · 03-05-2006, 11:46 PM

my last motor i built i drove it 300 miles, just cruising around, changed the oil, and cut the oil filter and then started racing it. It doesnt take long at all for the rings to seal up.

Wickd GT · 03-06-2006, 04:54 AM

Well, my break ins are, start it up with out water to get the rings to seal. Then let it cool off, put water on it then go drive it around loading the motor in high gear about 2000rpm then, open oil filter and check everything put fresh oil, take it to the track make 3 passes on motor then spray the shit out of it, lol...

Edgar

LeeH · 03-06-2006, 08:31 PM

Everything we build goes straight to the dyno where it gets up to operating temp and then gets ramped up to 100% load over the course of about 20 minutes, It then gets up to eight hours at 90% load. Get oil and water temp and check for leaks, Tune it then let her have it.

No matter what it should not be run with little to no load for any length of time, Cylinder pressure is crucial and with no load its going to be low. This is what causes glazing which equals oil consumption, Build cylinder pressure and heat!

ncontt · 03-07-2006, 05:19 AM

this is an interesting read as well....

click here

nxcoupe · 03-07-2006, 06:55 AM

Quote:

Originally Posted by ncontt

this is an interesting read as well....

click here

I knew someone would mention this. We have noticed more power and less warranty issues using this break in method. After road loading it in 4th gear for about an hour or so, we cool it and put it on the dyno as soon as we are able, then finish loading it and tuning it on the dyno. Works like a charm. I had the opportunity to see the inside of one of my engines after this break in procedure(we were putting a different set of heads on it), and even pulled a piston and rod out to look at bearings and piston side load. This was on a 331, and everything looked like brand new, cylinders looked great, engine really liked the tune and heads.
Try it next time you have an opportunity and you will see an improvement in cylinder ring seal.

Shankin · 03-07-2006, 02:36 PM

Pull um off the lift right to the rollers!

03-05-2006, 07:10 PM	#1
jwillburn119 Senior Member Join Date: May 2005 Location: temple, tx Posts: 240	break in time... i know you guys have done alot of engines... lets see what kind of break-in mileage everyone goes by...???? __________________ Whats in your WALLET?

03-05-2006, 07:39 PM	#2
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	Re: break in time... put 500 miles on my 306 last year before going to the dyno. After going to the dyno i had to tear the engine back down due to some bearing issues. The next go around it we put the engine in the night and morning before FFW at Commerce last year and drove it the 200 miles there and raced it both days that weekend with no issues other than one of my Cometic head gaskets didn't seal properly __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

03-05-2006, 09:16 PM	#3
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	Re: break in time... The key is (especially the first few miles) to keep RPM and load varied. ie: run at 2k, then 3500, then maybe 2500, then 3000, etc...occasionally accelerating lightly, lugging car lightly. Do this for a couple hours, then change oil. Drive normal, no hard acceleration, for the next 500 miles. Change oil at least once during that. Then gradually you can start giving it hell if it's lived thus far. __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

03-05-2006, 10:08 PM	#4
04 Mach1 Bet I red light B4U Join Date: Aug 2005 Location: ANNISTON, AL Posts: 975	Re: break in time... Everyone seems to do it a little different. Its always good to put a couple of hundred miles on the motor before beating on it especially on a everyday driver. Pretty much everything Coupe said, But I always seem I break mine in at the track.

03-05-2006, 11:46 PM	#5
1Quik85GT Senior Member Join Date: Apr 2005 Posts: 895	Re: break in time... my last motor i built i drove it 300 miles, just cruising around, changed the oil, and cut the oil filter and then started racing it. It doesnt take long at all for the rings to seal up.

03-06-2006, 04:54 AM	#6
Wickd GT Friends Join Date: Dec 2004 Posts: 1,645	Re: break in time... Well, my break ins are, start it up with out water to get the rings to seal. Then let it cool off, put water on it then go drive it around loading the motor in high gear about 2000rpm then, open oil filter and check everything put fresh oil, take it to the track make 3 passes on motor then spray the shit out of it, lol... Edgar

03-06-2006, 08:31 PM	#7
LeeH Senior Member Join Date: Dec 2005 Location: The conservative underground Posts: 341	Re: break in time... Everything we build goes straight to the dyno where it gets up to operating temp and then gets ramped up to 100% load over the course of about 20 minutes, It then gets up to eight hours at 90% load. Get oil and water temp and check for leaks, Tune it then let her have it. No matter what it should not be run with little to no load for any length of time, Cylinder pressure is crucial and with no load its going to be low. This is what causes glazing which equals oil consumption, Build cylinder pressure and heat!

03-07-2006, 05:19 AM	#8
ncontt pro-jackstand racer Join Date: May 2005 Location: Milner, Ga Posts: 2,473	Re: break in time... this is an interesting read as well.... click here __________________ And God created Neil Peart so that lightning would make sense to the world. ~~~~~~~~~~~~~~~~~~~~~~~~~~~

03-07-2006, 02:36 PM	#10
Shankin Senior Member Join Date: Jul 2005 Posts: 339	Re: break in time... Pull um off the lift right to the rollers! __________________ Pro Speed Performance 770 222 5015