Re: Cam Break in?
[Re: RATTRAP]
#3071311
08/25/22 10:05 AM
08/25/22 10:05 AM
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Joined: Jan 2003
Posts: 75,070 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,070
U.S.S.A.
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Flat tappet ? Aggressive lobes ?
running up my post count some more .
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Re: Cam Break in?
[Re: JohnRR]
#3071327
08/25/22 10:39 AM
08/25/22 10:39 AM
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Joined: Mar 2005
Posts: 1,581 N/E, Michigan
RATTRAP
OP
pro stock
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OP
pro stock
Joined: Mar 2005
Posts: 1,581
N/E, Michigan
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Flat tappet ? Aggressive lobes ? Roller tappet & aggressive cam lobes! valve lift Intake .760 exhaust .721, 266/282 duration
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Re: Cam Break in?
[Re: RATTRAP]
#3071330
08/25/22 10:46 AM
08/25/22 10:46 AM
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Joined: Mar 2003
Posts: 6,340 Heaven
EvilB1Dart
master
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master
Joined: Mar 2003
Posts: 6,340
Heaven
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What type of cam and springs? Real aggressive? That'll make the decision a little easier on whether to do it or not. Key is to just follow the provided instructions to cover your a** and mitigate disaster. However, if you decide to not remove the inner springs check the lifters to make sure they're free and can move in the bores. If one lifter stops its lights out! Use good oil and additive, etc. Most importantly prime the engine before you fire it, and when it fires your going to want that thing hitting the RPMs 2200-2500 instantly for good oil circulation for 20-25 minutes. Then slowly back off the throttle when that time comes.
If it were me I'd just take the time to break it in right by removing the inner springs. Taking the inner spring out is cheap insurance against a failure no matter what as there is less psi on it to maybe prevent that lifter from moving. Yeah its more work, but why risk it and you won't. have that sick feeling in your stomach or crossing your fingers before you hit the ignition button. Again, run good quality oil/additive.
"Any fool can know. The point is to understand"
- A. Einstein
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Re: Cam Break in?
[Re: EvilB1Dart]
#3071331
08/25/22 10:51 AM
08/25/22 10:51 AM
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Joined: Mar 2005
Posts: 1,581 N/E, Michigan
RATTRAP
OP
pro stock
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OP
pro stock
Joined: Mar 2005
Posts: 1,581
N/E, Michigan
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What type of cam and springs? Real aggressive? That'll make the decision a little easier on whether to do it or not. Key is to just follow the provided instructions to cover your a** and mitigate disaster. However, if you decide to not remove the inner springs check the lifters to make sure they're free and can move in the bores. If one lifter stops its lights out! Use good oil and additive, etc. Most importantly prime the engine before you fire it, and when it fires your going to want that thing hitting the RPMs 2200-2500 instantly for good oil circulation for 20-25 minutes. Then slowly back off the throttle when that time comes.
If it were me I'd just take the time to break it in right by removing the inner springs. Taking the inner spring out is cheap insurance against a failure no matter what as there is less psi on it to maybe prevent that lifter from rotating. Yeah its more work, but why risk it and you won't. have that sick feeling in your stomach or crossing your fingers before you hit the ignition button. Again, run good quality oil/additive.
Spring pressure is 300 seat & 750 open.
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Re: Cam Break in?
[Re: RATTRAP]
#3071332
08/25/22 10:54 AM
08/25/22 10:54 AM
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Joined: May 2019
Posts: 713 Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 713
Lake Villa Il
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Spring pressure is 300 seat & 750 open.
You don't need to remove the inner spring to run in a solid roller. There shouldn't be much "break in" going on. If running a bushed lifter you will likely need to break those in with some rpm.
Last edited by INTMD8; 08/25/22 10:55 AM.
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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Re: Cam Break in?
[Re: RATTRAP]
#3071341
08/25/22 11:42 AM
08/25/22 11:42 AM
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Joined: Jan 2003
Posts: 13,376 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,376
Marion, South Carolina [><]
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No cam break-in needed w/ a roller.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Cam Break in?
[Re: RATTRAP]
#3071343
08/25/22 11:46 AM
08/25/22 11:46 AM
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Joined: Mar 2003
Posts: 6,340 Heaven
EvilB1Dart
master
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master
Joined: Mar 2003
Posts: 6,340
Heaven
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Flat tappet ? Aggressive lobes ? Roller tappet & aggressive cam lobes! valve lift Intake .760 exhaust .721, 266/282 duration Yep, as stated. No cam break-in with a roller.
"Any fool can know. The point is to understand"
- A. Einstein
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Re: Cam Break in?
[Re: RATTRAP]
#3071367
08/25/22 01:14 PM
08/25/22 01:14 PM
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Joined: Aug 2003
Posts: 43,243 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,243
Bend,OR USA
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Last edited by Cab_Burge; 08/25/22 01:16 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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