Re: Wiped Cams
[Re: cudaman1969]
#2852966
11/29/20 03:52 PM
11/29/20 03:52 PM
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Joined: Jun 2012
Posts: 1,899 MYRTLE BEACH SOUTH CAROLINA
ek3
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[align:right][/align] taper is on both the cam and lifter faces... tool steel lifters can fix a lot of this..... Lifter is supposed to be flat, taper on the cam. That’s why the lifter turns. I think another problem is the cam load center has to be on the outside of lifter (cam to far in or out) to close to the center it’s harder to turn. Look at the cam in the hole, roller dead center, solid-hydraulic offset. imo roller cams must use a thrust button. they will walk out of the front of the block without one. they have no taper ... a flat tappet, whether solid or hyd. has the offset ground in them that keeps them in the block and spins the lifter on the cam. if the lifter stops turning , they both will gall and fail even with the best motor oil in the world. I will bet 99 % of all failures are due to this. the more rare event is bad metal in the cam or lifter... and a good set of matched tool steel lifters will prevent that . they cost more but , you can swap them into any hole on any cam over and over ... if you don't want a failure , check all the parts for correct tolerance - lifter bores too. just be certain they rotate ..
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Re: Wiped Cams
[Re: moparx]
#2853375
11/30/20 02:51 PM
11/30/20 02:51 PM
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Joined: Aug 2011
Posts: 2,843 Pattison Texas
CSK
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i thought the only lifters able to be swapped cam to cam, and hole to hole were the shubeck's ? even being tool steel, i would think each lifter would wear the cam lobe [at least] to the way the bore was machined. AND as I have said before, NO Tool Steel lifters for me ever again on the street.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Wiped Cams
[Re: DrCharles]
#2853559
11/30/20 09:03 PM
11/30/20 09:03 PM
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Joined: Jan 2003
Posts: 6,130 Melbourne , Australia
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I have a Howards FT in my 360. I am a little worried we went a bit nuts with the seat pressure, as I am not sure how great the lobes look now. I might check the lifters before it goes on the dyno again, it's been sitting for a long time.
Alan Jones
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Re: Wiped Cams
[Re: moparx]
#2853983
12/01/20 08:26 PM
12/01/20 08:26 PM
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Joined: Jun 2012
Posts: 1,899 MYRTLE BEACH SOUTH CAROLINA
ek3
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i thought the only lifters able to be swapped cam to cam, and hole to hole were the shubeck's ? even being tool steel, i would think each lifter would wear the cam lobe [at least] to the way the bore was machined. years ago trend performance was working on this... if you get the correct parts ,it has been done. I have done it on circle track engines that had some lobe profiles that were considered impossible ... to live long if at all ! any seat pressure over 135-140 was asking for it...I went by that rate quick ! the cam and lifter must match. you can get tool steel lifters uncoated for std. type cams but the ultimate trend perf. lifter will live on a tool steel cam ! this link if it will work , should be saved for all the wiped lifter questions... it has a good grasp on how cams and lifters interact . also at one time you could have the lifters re-ground/polished to restore them to new !! ----EK3 https://blog.trendperform.com/inside-the-highest-tech-flat-tappet-lifers
Last edited by ek3; 12/01/20 08:27 PM.
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Re: Wiped Cams
[Re: ek3]
#2853991
12/01/20 08:37 PM
12/01/20 08:37 PM
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Joined: Aug 2011
Posts: 2,843 Pattison Texas
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i thought the only lifters able to be swapped cam to cam, and hole to hole were the shubeck's ? even being tool steel, i would think each lifter would wear the cam lobe [at least] to the way the bore was machined. years ago trend performance was working on this... if you get the correct parts ,it has been done. I have done it on circle track engines that had some lobe profiles that were considered impossible ... to live long if at all ! any seat pressure over 135-140 was asking for it...I went by that rate quick ! the cam and lifter must match. you can get tool steel lifters uncoated for std. type cams but the ultimate trend perf. lifter will live on a tool steel cam ! this link if it will work , should be saved for all the wiped lifter questions... it has a good grasp on how cams and lifters interact . also at one time you could have the lifters re-ground/polished to restore them to new !! ----EK3 https://blog.trendperform.com/inside-the-highest-tech-flat-tappet-lifers And I did all of this, Trend Lifters & it was an VERY expensive lesson.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Wiped Cams
[Re: ek3]
#2854036
12/01/20 09:49 PM
12/01/20 09:49 PM
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Joined: Aug 2011
Posts: 2,843 Pattison Texas
CSK
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you wiped lobes ?? or lifters ? The nose on every lobe, it was a long discussion on here, the lash never changed
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Wiped Cams
[Re: CSK]
#2854097
12/01/20 11:52 PM
12/01/20 11:52 PM
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Joined: Jun 2012
Posts: 1,899 MYRTLE BEACH SOUTH CAROLINA
ek3
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sounds like the lifters lived and the cam died ! billet cam? i never saw the thread... I set records with my deal .. absolutely flawless ...they are still scratching their heads wondering how I did it . always trying to learn over here !!
Last edited by ek3; 12/02/20 01:12 AM.
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