If you have a new clutch how are you breakin in motors?
02-04-2009, 07:00 AM
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If you have a new clutch how are you breakin in motors? I had planned on following the run the car hard on the dyno but the clutch is new. I feel like I'm at a catch 22 here. The clutch is to be taken easy on for the first 500miles of stop and go. I've broke in a couple clutches this way and had good and my experience is bad with improper break in of the clutch=chatter/slipping. So following the engine break in of you should warm it up to operating temperature. Let cool and then run the car slightly hard at 3/4throttle and make the next few passes at full throttle to properly seat the rings what do I do about the clutch end??? I'm hoping to be putting a 408ci in with around 475-500rwtq. I would imagine that will push on that fresh clutch pretty hard with full throttle. What do you recommend?
seems pretty hard to things properly unless you drop things more then once 
02-07-2009, 09:29 AM
#5
I broke in new clutch,402ci motor and trans all at same time. As I was driving the 100mi home from the speed shop I would jump my mph from 65 to 80mph and drive between 5th and 6th grear to alter the rpm's. Same around town,just alot less speed. After about 200mi I did start to get on it some in 2nd and 3rd gear around town going to 5,000-5,500rpm's from time to time. 500mi I was going to red line(no first gear luanches yet) After 1,000mi to be safe the clutch was fully broke in I went to the track. Ran my first n/a 10sec pass on the first try in a m6 3,700lbs car.
Last edited by mike c.; 02-08-2009 at 11:30 AM.
02-10-2009, 08:24 PM
#7
What break in do you need for a motor? Get it hot and let it cool a couple time to heat cycle the valve springs then flog it. The only thing really hard on a new clutch is clutch dumps. A clutch is JUST like a set of brakes. Get it too hot to soon and you are going to glaze it. High gear romps are also a little tough on a new clutch.
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02-12-2009, 10:11 AM
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I had planned on following the run the car hard on the dyno but the clutch is new. I feel like I'm at a catch 22 here. The clutch is to be taken easy on for the first 500miles of stop and go. I've broke in a couple clutches this way and had good and my experience is bad with improper break in of the clutch=chatter/slipping. So following the engine break in of you should warm it up to operating temperature. Let cool and then run the car slightly hard at 3/4throttle and make the next few passes at full throttle to properly seat the rings what do I do about the clutch end??? I'm hoping to be putting a 408ci in with around 475-500rwtq. I would imagine that will push on that fresh clutch pretty hard with full throttle. What do you recommend?
Bruce,
Depending on who you are dealing with... They probably sell clutches to racers... Ask them how you are supposed to break in a clutch on a purpose built race car....
Do the best you can to not allow the clutch to become glaized.... and let her eat. If the clutch is manufactured correctly....and installed correctly... Shes ready to go after the first 7k drop.
Thanks
Dennis
