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Author
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Topic: how many miles does it take to break in a cam
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1fastmach1
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Member # 10137
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posted
 
 
just got my f-303 cam how many miles do i gota baby it intill its brokin in dont wanna flat spot the cam some some say 100 miles and my other friend said 500-1000 miles
thanks,
brett
[ February 26, 2012, 08:00 PM: Message edited by: 79 cobra ]
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REDLINE MOTORSPORTS CC EST 2011
1993 CHP sold
2004 mach 1 408 Windsor n20 fed
R.I.P. JORGE GUTIERREZ JR
6/13/1982- 11/05/2013
Posts: 2592 | From: clawwwitter to 7th st | Registered: Jul 2010
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triple b
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Member # 8763
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posted
its a roller wont flat spot
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1988 4cyl conv 306 HCI "sasha"
2004 tahoe
Sold- 87 GT, 72 chevelle, 63 biscane, 82 monte carlo, 73 nova, 88 silverado,
Posts: 1730 | From: sacramento ca | Registered: Nov 2008
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1fastmach1
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Member # 10137
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posted
yeah f-303 hydralic roller
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REDLINE MOTORSPORTS CC EST 2011
1993 CHP sold
2004 mach 1 408 Windsor n20 fed
R.I.P. JORGE GUTIERREZ JR
6/13/1982- 11/05/2013
Posts: 2592 | From: clawwwitter to 7th st | Registered: Jul 2010
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1ST0KGT
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Member # 10606
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posted
Ill give it a good 500 to be safe
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RIP Willie Guzman (5LTRSVT)
04/24/87-11/23/12
Posts: 1742 | From: San Jose (SOUTH BAY) | Registered: Jan 2011
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1fastmach1
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Member # 10137
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posted
aite guess i gotta go on some long cruises then
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REDLINE MOTORSPORTS CC EST 2011
1993 CHP sold
2004 mach 1 408 Windsor n20 fed
R.I.P. JORGE GUTIERREZ JR
6/13/1982- 11/05/2013
Posts: 2592 | From: clawwwitter to 7th st | Registered: Jul 2010
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BIGBALLFACTOR
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Member # 7277
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posted
quote:
Originally posted by triple b:
its a roller wont flat spot
bullshit roller cam can get flats spots too
Posts: 6908 | From: okc | Registered: Dec 2006
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1fastmach1
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Member # 10137
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posted
quote:
Originally posted by SS396 chevelle aka fasthatch:
quote:
Originally posted by triple b:
its a roller wont flat spot
bullshit roller cam can get flats spots too
yeah thats what i thought
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REDLINE MOTORSPORTS CC EST 2011
1993 CHP sold
2004 mach 1 408 Windsor n20 fed
R.I.P. JORGE GUTIERREZ JR
6/13/1982- 11/05/2013
Posts: 2592 | From: clawwwitter to 7th st | Registered: Jul 2010
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triple b
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Member # 8763
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posted
never seen or heard of it maybe if you running extremly high spring pressures or low idle speed where the oil pump doesn't lube the roller bearings in the lifters and they fail to "roll" lol
[ February 26, 2012, 09:51 PM: Message edited by: triple b ]
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1988 4cyl conv 306 HCI "sasha"
2004 tahoe
Sold- 87 GT, 72 chevelle, 63 biscane, 82 monte carlo, 73 nova, 88 silverado,
Posts: 1730 | From: sacramento ca | Registered: Nov 2008
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84SVOrick
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Member # 9039
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posted
I was taught that the roller cams dont wear or get hot spots, they were the upgrades too flat tappets flaws
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Bay Area Stunnaz
RIP Jeannera "FOXY302"
10/29/87-10/9/10
1984 SVO 302 HCI a basic bitch
1986 GT FOXY302 stolen and totaled R.I.P.
Posts: 1928 | From: Vallejo CA | Registered: Mar 2009
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ItzStock
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Member # 9665
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posted
I don't think you have to break in roller cams.
Posts: 1394 | From: Vallejo, Ca | Registered: Dec 2009
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blueoval55
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Member # 9787
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posted
i always tell people to do the 20 minutes at 2,000 rpm just like you would a flat tappet cam. gets everything lubed when first fired. after that, go beat on it! but really no break in is necessary, but it cant hurt.
roller lifters only oil the needle bearings in the roller end through splash & windage, unless you get solid rollers with pressure feed. never seen a hydraulic cam wear or "flat spot" unless the lifter fails. solid rollers with alot of spring pressure do wear, but not flat spot, they get what is called "tracking" where there is a small amount of wear evenly on the nose of the lobe.
Posts: 95 | Registered: Feb 2010
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Murder mach
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Member # 10590
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posted
not true.hydro cams can go flat without the lifter being bad.usualy near the rear
Posts: 860 | From: stockton area | Registered: Jan 2011
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84SVOrick
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Member # 9039
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posted
Ive never heard of a roller cam go bad either
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Bay Area Stunnaz
RIP Jeannera "FOXY302"
10/29/87-10/9/10
1984 SVO 302 HCI a basic bitch
1986 GT FOXY302 stolen and totaled R.I.P.
Posts: 1928 | From: Vallejo CA | Registered: Mar 2009
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[SHO]TIME
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Member # 8962
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posted
Okay I realize that no one here is a machinist as for roller cam intalls there is no specific break in procedures.if your installing new lifters with the cam i would definately presoak them in oil for a good day and then install them sure on initial fire up i wouldnt just start revin that bitch through the roof. just keep steady 1500 to 2000 just to get all the lifters fully pumped with oil.if your just sticking a high lift cam in a 302 without having any machining done in the heads as far as springs you can bet that your going to risk bottoming out your springs. if this happens you've got problems! I've seen this happen plenty of times and it usually results in a broken lifter and ruined cam ouch! so just measure the clearence between your spring coils at full valve open position
[ February 27, 2012, 12:06 AM: Message edited by: [SHO]TIME ]
Posts: 631 | From: marin | Registered: Feb 2009
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svfreerider87
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Member # 5748
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posted
quote:
Originally posted by [SHO]TIME:
Okay I realize that no one here is a machinist as for roller cam intalls there is no specific break in procedures.if your installing new lifters with the cam i would definately presoak them in oil for a good day and then install them sure on initial fire up i wouldnt just start revin that bitch through the roof. just keep steady 1500 to 2000 just to get all the lifters fully pumped with oil.if your just sticking a high lift cam in a 302 without having any machining done in the heads as far as springs you can bet that your going to risk bottoming out your springs. if this happens you've got problems! I've seen this happen plenty of times and it usually results in a broken lifter and ruined cam ouch! so just measure the clearence between your spring coils at full valve open position
<small>[ February 27, 2012, 12:06 AM: Message edited by: [SHO]TIME ]</small>
it's to my understanding that if you pre soak the lifters they bind up, kind of like a hydrolock? correct me if i'm wrong, my machinist said if anything is going to go wrong on a fresh cam swap/engine build it's going to happen in the first 50 miles, I did what he said and drove it easy for 300 miles, with two oil changes, one at 150 miles and the final one at 300.
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Dreamspeed Motorsports
Posts: 1685 | From: Sunnyvale | Registered: Jun 2005
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JZTRK
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Member # 7641
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posted
roller cams do not need to be broke in romp on that shit and dont sweat it
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ANY THING PAST FIRST AND IM BREAKING THE LAW !!!
1990 lx Hatch (sold) 2014 GT Track Pack (sold) 2016 GT350 (sold)
1 of 16 2019 kona blue GT350R
Posts: 771 | From: My 44 Magnum says HI | Registered: May 2007
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1fastmach1
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Member # 10137
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posted
yeah its goin on my 306 with afr heads with upgraded valve springs part number AFR#8000 it says its good up to .710" lift so i should be good and for lifters i got aftermarket gatorback link roller lifters with cromoly pushrods and 1.72 roller rockers
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REDLINE MOTORSPORTS CC EST 2011
1993 CHP sold
2004 mach 1 408 Windsor n20 fed
R.I.P. JORGE GUTIERREZ JR
6/13/1982- 11/05/2013
Posts: 2592 | From: clawwwitter to 7th st | Registered: Jul 2010
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triple b
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Member # 8763
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posted
lol presoak them i dont know about a day but i would do a dip atleast and for sure prime the engine before i started i warm my engine before i drive everyday at idle for a few minutes after not driving for 8 hrs
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1988 4cyl conv 306 HCI "sasha"
2004 tahoe
Sold- 87 GT, 72 chevelle, 63 biscane, 82 monte carlo, 73 nova, 88 silverado,
Posts: 1730 | From: sacramento ca | Registered: Nov 2008
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1fastmach1
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Member # 10137
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posted
yeah i was planin on pre lubeing the engine before i fired her upp and gona let it sit at 2500 rpm for about 25-45 mins before i even drive it then go to my boys house in tracy babying it the whole way but soon has im out there time to pick on some evo's and couple vettes
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REDLINE MOTORSPORTS CC EST 2011
1993 CHP sold
2004 mach 1 408 Windsor n20 fed
R.I.P. JORGE GUTIERREZ JR
6/13/1982- 11/05/2013
Posts: 2592 | From: clawwwitter to 7th st | Registered: Jul 2010
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JZTRK
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Member # 7641
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posted
what kind of heads?
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ANY THING PAST FIRST AND IM BREAKING THE LAW !!!
1990 lx Hatch (sold) 2014 GT Track Pack (sold) 2016 GT350 (sold)
1 of 16 2019 kona blue GT350R
Posts: 771 | From: My 44 Magnum says HI | Registered: May 2007
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1fastmach1
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Member # 10137
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posted
Afr 185 part # 1428
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REDLINE MOTORSPORTS CC EST 2011
1993 CHP sold
2004 mach 1 408 Windsor n20 fed
R.I.P. JORGE GUTIERREZ JR
6/13/1982- 11/05/2013
Posts: 2592 | From: clawwwitter to 7th st | Registered: Jul 2010
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4IDFOX
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Member # 9921
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posted
You will need to check pushrod length. Sounds to me like it could end up being different than stock with those lifters and if the block or heads have been milled.
Posts: 375 | From: Redding CA | Registered: Apr 2010
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1fastmach1
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Member # 10137
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posted
yeah already checked with the adjustable push rod tool and it uses 6.700 length
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REDLINE MOTORSPORTS CC EST 2011
1993 CHP sold
2004 mach 1 408 Windsor n20 fed
R.I.P. JORGE GUTIERREZ JR
6/13/1982- 11/05/2013
Posts: 2592 | From: clawwwitter to 7th st | Registered: Jul 2010
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1fastmach1
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Member # 10137
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posted
engine is all put togather goin fishin today and tomarrow time to mess around with it
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REDLINE MOTORSPORTS CC EST 2011
1993 CHP sold
2004 mach 1 408 Windsor n20 fed
R.I.P. JORGE GUTIERREZ JR
6/13/1982- 11/05/2013
Posts: 2592 | From: clawwwitter to 7th st | Registered: Jul 2010
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