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b1 t&d question #1665288
08/29/14 11:22 PM 08/29/14 11:22 PM
Joined: Aug 2003
Posts: 509
duluth,mn
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psycomopar Offline OP
mopar
psycomopar  Offline OP
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duluth,mn
I broke a rocker on my b1 heads they were t&d rockers. I just got a used set since it would be 4 weeks minimum to get new ones. I received the rockers and they had been clearanced. Was wondering if anyone has had luck using them like this. Here is a pic of the ones I got and the one I broke. What are opinions? If these are going to possibly break I would rather call it a season and order new ones. I broke a lifter when that rocker broke. Don't want that to happen again

And pic of what one that hasn't been clearanced looks like. There isn't much metal there

Last edited by psycomopar; 08/30/14 01:22 AM.
Re: b1 t&d question [Re: psycomopar] #1665289
08/29/14 11:36 PM 08/29/14 11:36 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
The small short shaft TD set up is much stronger
over the single shaft
Re: b1 t&d question [Re: MR_P_BODY] #1665290
08/29/14 11:39 PM 08/29/14 11:39 PM
Joined: Aug 2003
Posts: 509
duluth,mn
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psycomopar Offline OP
mopar
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duluth,mn
If I end up not using these and ordering new that's what I am going to get.
Re: b1 t&d question [Re: psycomopar] #1665291
08/30/14 09:47 AM 08/30/14 09:47 AM
Joined: Sep 2003
Posts: 19,456
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
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north of coder
when something like that is clearanced, i don't like the multiple stepps left, nor the very sharp radius left on the bottom of the step. these imperfections if you will, cause stress rizers, and will ultimately lead to results you will not be happy with. i would much rather see a ballnose endmill used and the retainer side of the clearance gently smoothed outward. the problem is finding a ballnose endmill of the right size. or a standard endmill with a custom [generous] radius grind. just my opinion.
Re: b1 t&d question [Re: moparx] #1665292
08/30/14 09:55 AM 08/30/14 09:55 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
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Posts: 52,972
Romeo MI
Quote:

when something like that is clearanced, i don't like the multiple stepps left, nor the very sharp radius left on the bottom of the step. these imperfections if you will, cause stress rizers, and will ultimately lead to results you will not be happy with. i would much rather see a ballnose endmill used and the retainer side of the clearance gently smoothed outward. the problem is finding a ballnose endmill of the right size. or a standard endmill with a custom [generous] radius grind. just my opinion.




When I was clearing that area I had to get a mill
bit made up.. mine is 1.57 dia with a radius on the
bottom... its not a cheap tool bit
Re: b1 t&d question [Re: MR_P_BODY] #1665293
08/30/14 10:06 AM 08/30/14 10:06 AM
Joined: Sep 2003
Posts: 19,456
north of coder
moparx Offline
"Butt Crack Bob"
moparx  Offline
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Joined: Sep 2003
Posts: 19,456
north of coder
"not cheep" is right mr.p... but a hard running engine ain't either ! just call it "cheep" insurance.........
Re: b1 t&d question [Re: psycomopar] #1665294
08/30/14 11:24 AM 08/30/14 11:24 AM
Joined: Apr 2005
Posts: 2,128
Salt Lake City
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camastomcat Offline
top fuel
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Salt Lake City
Quote:

If I end up not using these and ordering new that's what I am going to get.



I ran those rockers on my B1 and they were clearanced just like our are. They worked fine and I never broke one. That said, I would not run a spring with more pressure than 800 open pressure, and if you don't have a cam that operates in the 8000 rpm zone, you shouldn't need anymore spring than that. I would look at Manley's part number 221425. JMO
Re: b1 t&d question [Re: camastomcat] #1665295
08/31/14 11:52 PM 08/31/14 11:52 PM
Joined: Aug 2003
Posts: 509
duluth,mn
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psycomopar Offline OP
mopar
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duluth,mn
I'm pretty sure I have some where around #800. Can is a touch over 800 lift 330ish duration. But it is 605 so it's made most hp at 6600. So dosent rev real high.
Re: b1 t&d question [Re: psycomopar] #1665296
09/01/14 12:11 AM 09/01/14 12:11 AM
Joined: Apr 2005
Posts: 2,128
Salt Lake City
C
camastomcat Offline
top fuel
camastomcat  Offline
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Joined: Apr 2005
Posts: 2,128
Salt Lake City
Quote:

I'm pretty sure I have some where around #800. Can is a touch over 800 lift 330ish duration. But it is 605 so it's made most hp at 6600. So dosent rev real high.




If it peaks HP at 6600, I wouldn't turn it over 7200. I would run those rockers if that's what I had, and did.
Re: b1 t&d question [Re: camastomcat] #1665297
09/01/14 02:35 AM 09/01/14 02:35 AM
Joined: Jul 2010
Posts: 417
reynoldsburg,ohio
poppaj Offline
mopar
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Posts: 417
reynoldsburg,ohio
330 duration??

AA/NSS 65'Coronet "Whompin Wedge"
Pop & Son Performance 557" B-1 power
John Holt Chassis
Re: b1 t&d question [Re: poppaj] #1665298
09/01/14 11:18 AM 09/01/14 11:18 AM
Joined: Aug 2003
Posts: 509
duluth,mn
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psycomopar Offline OP
mopar
psycomopar  Offline OP
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duluth,mn
Couldn't remember the exact numbers. Looked at my card it's 281/296 at.050

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