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 Post Posted: Mon Sep 19, 2011 12:06 pm 
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Anyone know the correct size/correct bit to use to step the booster? I am thinking of trying to accopmlish that while the boosters are in the carb.


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 Post Posted: Wed Sep 21, 2011 11:02 am 
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If anyone is interested it appears 12mm/1/2 would work.


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 Post Posted: Wed Sep 21, 2011 12:00 pm 
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SonnyJames wrote:
If anyone is interested it appears 12mm/1/2 would work.


Actually 13 mm would be closer to 1/2". 25.4 mm = 1"

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 Post Posted: Wed Sep 21, 2011 3:07 pm 
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SonnyJames wrote:
Anyone know the correct size/correct bit to use to step the booster? I am thinking of trying to accopmlish that while the boosters are in the carb.


I haven't replied to this one as I really don't understand what you're trying to do? A little more info might help and also may keep you from chasing rabbits, ie, doing something that someone else has tried that DID NOT work?? :-k

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 Post Posted: Wed Sep 21, 2011 10:16 pm 
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I think he wants a stepped booster without replacing the stock ones. You will have an issue holding them steady enough to not break them in the carb, they are not that tough. I can do them for the cost of the boosters and shipping, but if you have someone local with a booster tool it would probably be cheaper. You might be able to do it, but be prepared in case you break one. The new Braswell boosters I have here are .520 at the step and flair out from there.


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 Post Posted: Thu Sep 22, 2011 6:20 pm 
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Thanks Jmark...decided to leave them alone...will have stepped ones installed on the next main body I buy.


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 Post Posted: Mon Oct 03, 2011 10:15 pm 
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I do different size steps -- depends on the carb size and application. 1/2" is good for bigger 4150's

PS. depth of the cut is important too.


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 Post Posted: Fri Oct 21, 2011 9:20 pm 
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Location: Auburndale, Florida
Pal of mine called the other day and informed me he has been able to machine a step in an installed 4150 booster. He made a fixture to center the endmill in the booster and support it to avoid breakage. I've been trying for two days to get over there and see how that works.


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 Post Posted: Tue Oct 25, 2011 7:32 pm 
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I got over to my buddy's to see the results of his on carb booster step machining. I didn't get to see this in operation but, I saw the result. It was everything he said it was. Maybe "you know who" can make a fixture so he can do it also.


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