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09-09-2011, 07:05 PM | #1 |
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model A and model B lifters
I wander if some one can tell me if I can use vave lifter from a model (A) in to a model (B) camshaft anny help will bi Apreciated thanks Jose.
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09-09-2011, 09:45 PM | #2 |
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Re: model A and model B lifters
Yes you can. The B style tappets are not available that know of. The difference in the A and B is, B's have a larger base. This doesn't stop you from using the A style on a B cam.
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09-10-2011, 11:00 AM | #3 |
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Re: model A and model B lifters
Check out Vince Falter's website, (fordgarage.com) in the index, go down to Repo Valve Lifter.
I used A lifters on a B cam and both were eaten up in 2500 miles. |
09-10-2011, 11:23 AM | #4 | |
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Re: model A and model B lifters
Quote:
I also checked out Vince's site. Vince gives good information there concerning problems with the use of model A tappets on the B cam. All of my engines are model A but I run B cams in a couple of them. I knew that the base of the tappets were different but was told at some time in the past that B lifters were also longer. Vince doesn't mention difference in length so maybe it isn't so. I allways used the adjustable single lock lifters and they are a lot easier to work with and have had no problems with them. |
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09-10-2011, 12:59 PM | #5 |
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Re: model A and model B lifters
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09-10-2011, 01:34 PM | #6 | |
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Re: model A and model B lifters
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All Ford made "A" and "B" cams had the lobe tip .779" from the center line making it .001" smaller than the cam journals as shown below. To increase the lift on the "B" cam they reduced the base circle of the lobe which in turn required taller tappets to make up the difference.
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09-10-2011, 01:44 PM | #7 |
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Re: model A and model B lifters
So the B tappets are longer. Thanks Marco.
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09-10-2011, 01:48 PM | #8 | |
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Re: model A and model B lifters
Quote:
The smaller base of the A lifter, dropping off the cam lobe quicker and scrapeing down the side of the lobe and causing rapid wear. At least that is the way that I understand it after reading what Vince had to say. |
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09-10-2011, 02:54 PM | #9 |
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Re: model A and model B lifters
We have used A lifters, on B cams, and B grinds, on A cams, for over 40 years with out distinction, and have absolutely NO problems. If yours were eaten up, I don't think you had found the real cause, as there are other things that can cause that, such as type of oil, reground cam and not rehardened, soft lifters, and a big one, debris left in the engine, such as, machine filings, This condition is not uncommon. There is a Machine Shop, that I know very well, had to redo some parts in a motor, that the Previous Rebuilder of a very few miles, used Time Saver to try to finish a bearing job that the rebuilder should have done with with a correctly ground crank, and correctly Align Bored Bearings. He had slopped this Timer saver stuff, all over the inside of the engine, and DID NOT clean it out, before he BUTTONED it up. You have to chemically clean any dirt, or at least any iron Particles, out, and off your engine parts be for assembly, and you have to use the correct type of cleaning machine. The best one that I have seen, and there may be better, is the stand up dish washer type, they use a very powerfull jet spray with their Chemical. The hot tanks with out agitation, are useless, the hot tank with Agitation is better, but I have seen nothing as good as the dish washer style. The last thing I will say, in my opinion, any thing that cuts bearing metal, cast, Brass Ect., has no place in an engine to compensate for poor machine work, or know how. Herm.
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09-10-2011, 03:13 PM | #10 |
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Re: model A and model B lifters
I'm guessing that if you used model A lifters with a B cam it would be necessary to use modern valves to make up for the .032 difference in the length of B lifters as compaired to the shorter model A lifters.
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09-10-2011, 03:43 PM | #11 | |
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Re: model A and model B lifters
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Also, I've been told/informed (by cam people, in answer to my Q re reground cams) that NO ONE rehardens the surface on 'reground cams'. Anyone have an opinion whether that is TRUE? Herm...if B lifter has larger base than A..AND THAT'S GOOD..Why doesn't someone make an even larger base that the B lifter has |
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09-10-2011, 04:09 PM | #12 | |
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Re: model A and model B lifters
Quote:
P.S. The lifters came from Berts Model A, and they are a hard body, as the lifter body, and bolt will laugh at a file! I am sure other places have them as well. Last edited by Kohnke Rebabbitting; 09-10-2011 at 04:18 PM. |
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09-10-2011, 04:27 PM | #13 |
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Re: model A and model B lifters
Ya, Mr. Hardtimes, I asked you the wrong Question, as it should have been asked of ABENNET. Same Question Sir, were your cam and lifters New, or Reground!! Thanks Herm.
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09-10-2011, 04:43 PM | #14 | |
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Re: model A and model B lifters
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Last edited by Kohnke Rebabbitting; 09-10-2011 at 05:52 PM. |
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09-10-2011, 05:33 PM | #15 |
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Re: model A and model B lifters
When I mention model A lifters, I'm not talking about adjustable lifters, I am refering to original model A lifters. Its just common sense to me if the length of the original model B lifter is longer than the original model A lifter, This in itself will cause a problem with valve adjustment clearance if model A original lifters are used with a model B cam, especially if it is a regrind, regardless of lifter base size. It seems to me that to make up the differance in length, if original model A lifters were used with a B cam would require cutting the seats deeper or useing longer, as in modern style valves.
Now If Jose Cartin, that started this thread is going to try and use model A lifters with a model B cam and use the valves that are in his engine he will end up with a huge clearance between lifter and valve stem. That is unless someone has previously installed modern valves with longer stems or he plans on sending it out for some machine work. |
09-10-2011, 05:47 PM | #16 | |
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Re: model A and model B lifters
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Last edited by Kohnke Rebabbitting; 09-11-2011 at 11:50 PM. |
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09-10-2011, 05:51 PM | #17 |
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Re: model A and model B lifters
You are probably right Mr. Purdy, as we always use the modern valves. Herm.
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09-10-2011, 06:03 PM | #18 | |
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Re: model A and model B lifters
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09-10-2011, 06:34 PM | #19 |
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Re: model A and model B lifters
Thanks Herm, I agree. It just wouldn't be something that someone trying to use original model A lifters in an unmodified original engine with a model B cam would be set up to handle.
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09-11-2011, 01:52 PM | #20 | |
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Re: model A and model B lifters
Quote:
Thanks for explanation. Hmm, I have a NOS B cam and you are right on...as it has BLACK colored lobes. Copper color in between. |
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