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Author Topic: Need advice on Greg black mpcs  (Read 544 times)
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Solidshi
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« on: Aug 31, 2017, 11:38AM »

Hi!I've played my Greg black 5GSD medium weight one for 2 years now…Recently,i tried a GB NY 5.25 M and found it blows more freely than my 5GSD but the rim is a little large for me… So now,I feel my 5GSD plays a little tight and bright…  So should I modify my 5GSD 's Throat or backbore,or just order a custom GB 5G with a more open (bore,backbone,throat)? Hi
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« Reply #1 on: Aug 31, 2017, 11:51AM »

Perhaps just get a NY series that had a rim you like more. Do they make a 6M?
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« Reply #2 on: Aug 31, 2017, 02:25PM »

The NY 5 series has the same size throat as the standard series, but with a different backbore.

Why not buy a standard 5G? It will be relatively easy to find and easy to resell if it's not right.

If the cup is too deep for you, then you'll have to contact Greg. My recommendation would be a 5GSD with a #1 backbore (I believe this is what's in the NY series), but check with him.
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« Reply #3 on: Sep 03, 2017, 09:04AM »

Just tried a GB 5G,still feel it was a little tight when I blew… so which part of the mpc should I do the custom,a more open backbone or a larger throat? And I knew GB backbore1 is smaller than standard backbone 2… but why the NY blows more open than the standard series?
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« Reply #4 on: Sep 03, 2017, 09:14AM »

The throat bore is just part of the equation. Sure, at the narrowest point they might both be .281", but I'll bet the where the cup enters into the throat on the NY, it is much more open, as well as yhrough the backbore.
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« Reply #5 on: Sep 03, 2017, 09:38AM »

So i may need a more open backbore -backbore3 ?
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« Reply #6 on: Sep 03, 2017, 01:23PM »

Get a NY5G threaded with a standard 5G rim?
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« Reply #7 on: Sep 03, 2017, 01:30PM »

So i may need a more open backbore -backbore3 ?

Probably not that.
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« Reply #8 on: Sep 03, 2017, 02:56PM »

Probably the entrance to the throat on the cup side. You should be able to look at both and eyeball what's different.

For example on the Griego Alessi 1C, the throat is .281", and it seems like it is narrowest right where the cup meets the throat. On the 1A, it supposedly is .295", but it looks exactly the same width as the 1C. However, the entrance to the throat where it meets the cup is bored out. Much wider there than on the 1C. I have a hunch that what you're feeling on the Greg Blacks is similar, but you'd have to look and maybe do some of your own measurements.
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"My technique is as good as Initial D"
T-396A - Griego 1C
88HTCL - Griego 1C
36H - DE XT105, C+, D Alto Shank
3B/F Silversonic - Griego 1A ss
pBone (with Yellow bell for bright tone)
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