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08-06-2020, 08:28 AM | #1 |
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Join Date: Jul 2011
Location: Oakland County, Michigan
Posts: 562
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It’s a thing of beauty! But now some questions…
After a month in the clutches of the USPS, my reground Isky 1007B camshaft FINALLY arrived from D&L Automachine (Thanks, Pete1!). Ain’t it pretty? Seriously, it’s almost too nice to use…
Anyway, as I start sourcing parts for the engine in my 1951 Ford, I have a few questions. 1. What valve springs should I run with this cam? I’d like the lowest seat pressure I can get away with. Would stock springs work? 2. What brand of valves and/or what vendor do you recommend for purchasing valves? 3. I’ve got a nice set of EAB heads. Can I run them with a 4-inch Mercury crank? If not, I also have a smattering of 8BAs. I assume shoot for around 0.050" piston-to-head and valve-to-head clearance, right? 4. For simplicity and drivability, I plan on running a single carburetor. Do the four-bolt Mercury intake manifolds flow more than the three-bolt Ford units or are they pretty much the same? Not sure if finding a Merc unit would be an improvement. |
08-06-2020, 08:41 AM | #2 |
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Join Date: Aug 2017
Location: ohio
Posts: 986
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Re: It’s a thing of beauty! But now some questions…
Admiral, Charlie NY did a 1 1/16 throttle bore 94 style carb for my 8BA with max 1 in it.
You could feel the difference, over the stcok 1" diameter 94. Just say'n. Charlie is easy to talk with..... Good luck & have fun! mike |
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08-06-2020, 08:50 AM | #3 |
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Join Date: Jul 2011
Location: Oakland County, Michigan
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Re: It’s a thing of beauty! But now some questions…
Thanks for the feedback, mfirth! Actually, I've got a 1 1/16"-bore Holley rebuilt and ready to run. Glad to hear they work well with this sort of combination. I'm shooting for good drivability, lots of low- and mid-range torque, with a little more oopmh than stock. Also, you're totally right about Charlie. He's SUPER nice, helped me order some parts to rebuild that carb, actually.
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08-06-2020, 08:56 AM | #4 |
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Join Date: Jan 2012
Location: Lyman,ME.
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Re: It’s a thing of beauty! But now some questions…
I’d talk to Pete on your valve questions...Im going to use a Merc intake on my next engine. Like the idea of the bigger bore 94..... Mark
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I'm thinkin' about crankin' My ragged ol' truck up and haulin' myself into town. Billy Joe Shaver |
08-06-2020, 10:29 AM | #5 | |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
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Re: It’s a thing of beauty! But now some questions…
Quote:
I will admit that I am a great booster of a 2G on a bored out merc manifold. The one problem I am having is getting the throttle to open all the way. Even with the throttle only opening 3/4 way, the increase in performance is impressive. |
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08-06-2020, 11:16 AM | #6 |
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Location: Star, MS
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Re: It’s a thing of beauty! But now some questions…
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I'm also using a 2G on a bored Mercury manifold and a Charlie NY chevy distributor. Overall, it is a. good, reliable system. I just wish I had used one of Pete's 1007B cams. |
08-06-2020, 11:23 AM | #7 |
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Re: It’s a thing of beauty! But now some questions…
I liked the idea.... but obviously I would need to do more research. The way I read his post the big bore 94 was a Merc carb and was four bolt. When I’m ready to do the swap, maybe I can pick your brain on 2G info...... Mark
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I'm thinkin' about crankin' My ragged ol' truck up and haulin' myself into town. Billy Joe Shaver |
08-06-2020, 12:13 PM | #8 |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
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Re: It’s a thing of beauty! But now some questions…
If you're referring to me, please do, as I have done several. I have a jig that you can use to bore the manifold and had a bunch of 1/8" aluminum plates made to seal off the bottom of the 2G, which has some odd heat passages cast into it.
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08-06-2020, 04:49 PM | #9 |
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Re: It’s a thing of beauty! But now some questions…
Yes, thanks. I had never heard of a “big bore-94” so I assumed it was a Merc carb. We all know what happens when we do that ...... Mark
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I'm thinkin' about crankin' My ragged ol' truck up and haulin' myself into town. Billy Joe Shaver Last edited by flatford8; 08-06-2020 at 06:11 PM. |
08-07-2020, 05:21 PM | #10 | |
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Join Date: Jul 2011
Location: Oakland County, Michigan
Posts: 562
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Re: It’s a thing of beauty! But now some questions…
Quote:
I think I'd like to run valve rotators for perhaps slightly improved longevity. Any idea if these work with the undercut, 1.5-inch Chevy valves? Other than the four-bolt carburetor mount, is the Mercury manifold any different than the Ford design? Do they flow more? |
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08-07-2020, 05:40 PM | #11 |
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Join Date: May 2010
Location: Star, MS
Posts: 4,024
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Re: It’s a thing of beauty! But now some questions…
In stock form I remember that the rotator valve keepers utilized a shorter spring than the non-rotators, but i don't remember how much shorter. I might be enough that you don't need shims. Or maybe too much if you don't use short springs. Maybe someone will chime in with the difference in length.
I can't help you with the flow differences. |
08-07-2020, 05:45 PM | #12 | |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
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Re: It’s a thing of beauty! But now some questions…
Quote:
Take a look down an intake manifold and see what you think. |
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