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 Post subject: Tapered Reamers
 Post Posted: Wed Dec 01, 2010 11:10 pm 
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Anyone measured the mainwells in any of these metering blocks to know what the diameter is at the bottom and the top? Thinking about buying a couple of reamers to experiment with.

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 Post subject: Re: Tapered Reamers
 Post Posted: Thu Dec 02, 2010 7:14 pm 
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Mark has done that with the BLP blocks he's using for his e85 conversion. In a PM he sent me he mentioned that they came from BLP with a #2 taper and were .160 at the bottom and .180 at at the angle channel.

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 Post subject: Re: Tapered Reamers
 Post Posted: Thu Dec 02, 2010 7:27 pm 
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MSC sells taper pin reamers, I have 0, 1, 2, and 3


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 Post subject: Re: Tapered Reamers
 Post Posted: Fri Dec 03, 2010 9:53 am 
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So what do you do for new plugs for the top of the mainwells?

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 Post subject: Re: Tapered Reamers
 Post Posted: Fri Dec 03, 2010 7:15 pm 
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Plugs are .250, so no issue using a #2 reamer.


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 Post subject: Re: Tapered Reamers
 Post Posted: Fri Dec 03, 2010 8:13 pm 
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jmarkaudio wrote:
Plugs are .250, so no issue using a #2 reamer.


So where do you get these plugs?

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 Post subject: Re: Tapered Reamers
 Post Posted: Fri Dec 03, 2010 9:08 pm 
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Ken - BLP sells the plugs. Part # 7107. Look up "Plugs" section of the "Carburetor Parts and Fuel Lines" section of their on-line catalog.

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 Post subject: Re: Tapered Reamers
 Post Posted: Fri Dec 03, 2010 10:21 pm 
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Go an address? PM me. I have 4 I can send you.


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 Post subject: Re: Tapered Reamers
 Post Posted: Sat Dec 04, 2010 8:37 am 
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jmarkaudio wrote:
Go an address? PM me. I have 4 I can send you.


Thanks for the offer Mark but I was just wanting to know who had them available as I figured others might want to know that also. Was thinking that if they are just a standard .250 plug that maybe someone like McMaster Carr might have something that would work? Something to look into I guess.

I'm not currently doing an E85 carb but that's not to say that I won't some time in the future. Just getting all the "ducks" in a row so to speak. ;-)

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 Post subject: Re: Tapered Reamers
 Post Posted: Tue Dec 07, 2010 4:28 pm 
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Been doing some research on these taper reamers and seems that they are all .250 TPF, which translates to about .021 per inch. Thinking about how my 1150 metering blocks are made has got me thinking that there's something there that I might have overlooked in the past.

When I got that thing and first started running it it was lean and I never could get enough jet in it. Had two "carb pros" work on it and it was still lean! THAT was the reason I built those add on metering plates and install those dump tubes at the booster skirt trying to get more fuel in it. Back then I figured that I needed about a .220 jet to get enough fuel but the crosswells in those metering blocks are only .206 and the booster pins are .213. I did take a dominator banjo and drill it out to .235 so that means that if I could figure out a way to mount those without the stake tubes, then I could open up the rest of that circuit and maybe do away with my 3rd circuit add on. Keep in mind that at this point there's nothing wrong with that carb and I did have it working pretty good season before last making it to two quarter finals in the three races I ran that fall.

So what I need is a junk carb to mess with. Hummm, this might be a problem since I killed my fleabay account the other day, which doesn't really matter I guess as it wasn't working for me anyway! :-k

A number 3 taper reamer gives me the diameter at the top that is somewhere near what I think I would need but I'd have to grind the end off some amount to get the bottom where I'd want it.

Just thinking out loud here............................................but I will order that reamer! ;-)

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 Post subject: Re: Tapered Reamers
 Post Posted: Tue Dec 07, 2010 7:26 pm 
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Remember the whole point, make the jet the restriction. An 1150 on Meth will want some decent sized passages. If I were doing one I would want he passages to be at least .225, a little larger if possible. Of course it would mean machining the main body for wider custom banjo's....


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