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06-07-2018, 09:46 PM | #21 |
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Re: 8BA loadamatic dist. with 2GC carb question
Clearance for larger secondary throttle plates?
Bruce
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06-07-2018, 10:41 PM | #22 |
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Re: 8BA loadamatic dist. with 2GC carb question
The 4 bolt Merc intake throttle bores do not match the 2GC carb throttle bores. So I have an old 2GC base and I just bore the intake to match. This lets the engine get the full benefit of the carb. Besides the mis match would prevent the carb from operating right?? Some guys jur blend the bores in with a grinder. But???
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06-08-2018, 12:52 AM | #23 |
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Location: Snohomish, WA
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Re: 8BA loadamatic dist. with 2GC carb question
Thank you. That is what I figured you were referring to. Its another detail that will need my attention. The fellow I recently got the truck from complained that the throttle would 'stick open'.
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06-08-2018, 02:51 AM | #24 |
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Re: 8BA loadamatic dist. with 2GC carb question
I have done the same thing. Unless you have the proper equipment it is not a trivial task. I used something called a "Rotabroach" I got from an outfit called "Blair Equipment". I mounted it in my benchtop drill press and used an old 2G base bolted to the manifold as a guide. It worked pretty slick; I was able to enlarge the throttle bores all the way to the base of the plenum. I have done both aluminum (Canadian) and cast iron manifolds this way.
https://shop.blairequipment.com/Rota...SAAEgKIgfD_BwE |
06-08-2018, 01:55 PM | #25 |
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Re: 8BA loadamatic dist. with 2GC carb question
Are these late 4 bolt 8BA intakes fairly available? Obviously I have the one that's on the truck now but swapping manifolds, having another manifold all ready to go before the tear down, would certainly speed up the process.
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06-08-2018, 02:06 PM | #26 |
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Re: 8BA loadamatic dist. with 2GC carb question
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06-08-2018, 04:26 PM | #27 |
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Re: 8BA loadamatic dist. with 2GC carb question
I was searching for a Merc manifold for a friend, getting tough to find one in either aluminum or c.i. that isn't roached at the gen mount, rusted to hell, or butchered.
I run my 2G without any grinding of the Merc manifold, no problems. I use two gaskets for heat isolation (aluminum manifold) and being a truck, I'm not winding it out to 5,000 RPM, so any flow benefit would be hard to find.
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06-08-2018, 06:33 PM | #28 |
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Re: 8BA loadamatic dist. with 2GC carb question
Thanks, 40 Deluxe.
Hard to convert/convince some people Mfirth: You had a matched set |
06-09-2018, 12:54 AM | #29 |
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Location: WA state
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Re: 8BA loadamatic dist. with 2GC carb question
Didn't some of the later aftermarket Stromberg 97s have a blended vacuum signal port designed for use with the Load-a-matic dist ?
Has anyone determined if they work effectively? |
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