01-29-2020, 10:13 PM | #1 |
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8cm cam grind
I have an 8cm camshaft that does not look too bad but when I chucked it in the lathe and measured the lift I found values between 0.330 and 0.320. One was at 0.335. These numbers were repeatable. My question is can this cam be the ground to something acceptable close to stock? I know the base circle changes but I think this will not be much of an issue.
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01-29-2020, 10:17 PM | #2 |
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Re: 8cm cam grind
Frank:
I believe Tilden Technologies does have a "hot" stock grind. It may be the EAB cam profile or something like that. Check out their webpage or give them a call. https://www.tildentechnologies.com/ Good luck. |
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01-29-2020, 10:29 PM | #3 |
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Re: 8cm cam grind
Also, 'Pete' Samuelson (here is on here as 'Pete') can grind all sorts of great profiles - I imagine he has something that would work for you. I'd drop him a PM or eMail and see what he says . . .
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01-30-2020, 08:40 PM | #4 |
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Re: 8cm cam grind
Pete has my cam right now,,,,,he has a good reputation.
Tommy |
01-30-2020, 09:28 PM | #5 |
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Re: 8cm cam grind
I can put a stock Mercury grind on you cam core. I am in New Zealand for a few weeks so would have to be when I return.
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01-31-2020, 05:44 AM | #6 |
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Re: 8cm cam grind
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01-31-2020, 06:04 AM | #7 | |
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Re: 8cm cam grind
Quote:
Also suspect that grinding it in an attempt to make it perfect will not produce any noticeable difference in performance.
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01-31-2020, 07:16 AM | #8 |
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Re: 8cm cam grind
I agree with this
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01-31-2020, 08:56 AM | #9 |
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Re: 8cm cam grind
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01-31-2020, 09:30 AM | #10 |
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Re: 8cm cam grind
I'm using a stock EAB cam in the 280, and am real pleased with it;s performance. Torque is amazing
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01-31-2020, 09:42 AM | #11 |
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Re: 8cm cam grind
Pete or Tony:
I have an EAB cam that has a damaged lobe. I'll try to get pict, but it has a chip in one of the lobes. Can something like this be successfully repair? |
01-31-2020, 10:06 AM | #12 |
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Re: 8cm cam grind
I have a Mercury engine in my '51 Ford. I had an Isky MAX-1 to install in it, but after checking the specs on the "Tilden" page and some discussion here, I left the stock cam and saved the Isky for a later build. In retrospect, I think I did the right thing.
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01-31-2020, 11:01 AM | #13 |
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Re: 8cm cam grind
The EAB cam was the last one FoMoCo made for the flathead V8 engines. It was designed to replace the 8BA cam to give the cars more torque for those that still had 239 CID. The 8CM cam was desiged for the Mercury 255 to give it a bit more torque. The Mercury cars were heavier than Ford beginning in 1949 but by 1952, the cars were a lot more similar in weight so the 239 needed a boost. The EAB cam was the replacement cam for all of them and Ford had them available for a long time after flathead production stopped. I still find NOS ones now and then.
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01-31-2020, 11:12 AM | #14 |
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Re: 8cm cam grind
I wonder what the specs. are on an EAB cam?
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01-31-2020, 01:47 PM | #15 |
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Re: 8cm cam grind
They are very similar to the 8CM specs. .330 lift. 205 deg. duration at .050 lift.
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01-31-2020, 03:25 PM | #16 |
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Re: 8cm cam grind
Just out of curiosity, does anyone know if there are "1CM" ('51 Mercury) or "EAC" ('52-'53 Mercury) separate grinds?
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01-31-2020, 04:07 PM | #17 |
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Re: 8cm cam grind
I do have a 1CM cam. Haven't plotted it though.
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01-31-2020, 04:12 PM | #18 |
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Re: 8cm cam grind
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01-31-2020, 04:16 PM | #19 |
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Re: 8cm cam grind
It can be fixed,BUT, at $80 bucks a pound for the welding rod it is not practical any more. When the core bank runs dry we will go back to fixing them.
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01-31-2020, 04:23 PM | #20 |
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Re: 8cm cam grind
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01-31-2020, 05:13 PM | #21 |
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Re: 8cm cam grind
The 1CM cam came about for the change over to the rotator type valves and the automatic transmission.
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01-31-2020, 06:47 PM | #22 |
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Re: 8cm cam grind
That makes a lot of sense. The automatic transmission would seem to me to require a milder cam for a smoother idle to accommodate idling in gear when stopped. Maybe, maybe not.
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01-31-2020, 07:03 PM | #23 |
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Re: 8cm cam grind
May I ask if there is a (best) stock cam for the pre 8ba style motors with the front mount dizzy?
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01-31-2020, 08:41 PM | #24 |
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Re: 8cm cam grind
get the merc cam and cut the gear off mart, piece o cake for you
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01-31-2020, 09:15 PM | #25 |
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Re: 8cm cam grind
Have the Merc cam ground on an early core.
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01-31-2020, 09:35 PM | #26 |
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Re: 8cm cam grind
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01-31-2020, 09:48 PM | #27 |
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Re: 8cm cam grind
May I ask if there is a (best) stock cam for the pre 8ba style motors with the front mount dizzy?
In my opinion, yes; the 32-34 steel cam. In 1935 with the introduction of the bigger, heavier bodies, along with cast iron camshafts, Ford 'detuned' the cam timing.
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01-31-2020, 10:44 PM | #28 |
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Re: 8cm cam grind
Do you have some specs to compare the cams?
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01-31-2020, 11:24 PM | #29 |
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Re: 8cm cam grind
Only some;
year engine valve lift inches intake opensBTC intake closesABC exhaust opens BBC exhaust closesATC 32-34 V8 85 .292" 9.5 * 54.5* 57.5* 6.5* 35-42 V8 85 .292" 0.0* 44.0* 48.0* 6.0* 46-49 V8 100 .292 0.0* 44.0* 48.0* 6.0* [1949 intake increased to .296" lift]
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Unfortunately, two half wits don't make a whole wit! Last edited by Brian; 02-01-2020 at 12:48 AM. |
02-01-2020, 12:14 AM | #30 |
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Re: 8cm cam grind
so my 34 motor that they left water in to freeze in not a boat anchor after all!
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02-01-2020, 12:32 AM | #31 |
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Re: 8cm cam grind
8CM that I degreed when building the 260 Merc:
9* 53* 50* 7* (checked at .014/.015 lash) .330 lift at 0 lash Compares nicely to the 32-34 cam Brian posted above. I think it'd be nice with the front modified for the early engine. An EAB cam is also very close to these numbers when advanced 4 degrees. Terry
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02-01-2020, 06:07 PM | #32 | |
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Re: 8cm cam grind
Quote:
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02-01-2020, 06:11 PM | #33 |
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02-01-2020, 06:28 PM | #34 |
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Re: 8cm cam grind
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02-01-2020, 10:51 PM | #35 |
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02-01-2020, 10:58 PM | #36 |
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Re: 8cm cam grind
You can install an 8ba style cam in an early block and front cover. Then you can run a late style distributor. W do this all the time
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02-01-2020, 11:03 PM | #37 |
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02-03-2020, 07:21 AM | #38 |
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