Part I: 3jack.blogspot.com/2013/04/the-road-to-golf-club-fitting-nirvana.html
Part II: 3jack.blogspot.com/2013/04/the-road-to-golf-club-fitting-nirvana_3.html
Part III: richie3jack.proboards.com/thread/4180
Part IV: 3jack.blogspot.com/2013/04/the-road-to-golf-club-fitting-nirvana_16.html
Part V: 3jack.blogspot.com/2013/04/the-road-to-golf-club-fitting-nirvana_23.html
Part VI: 3jack.blogspot.com/2013/04/the-road-to-golf-club-fitting-nirvana_29.html
Part VII: 3jack.blogspot.com/2013/05/the-road-to-golf-club-fitting-nirvana.html
Part VIII: 3jack.blogspot.com/2013/05/the-road-to-golf-club-fitting-nirvana_22.html
I am returning to this series after a chunk of a layoff. Most of it turned into due to me getting my Sand Wedge grinded by Joe Kwok (www.Joekwokgolf.Com). The other element turned into to me installing a brand new driving force head (nonetheless the identical Wishon 919THI version) at the side of reading Monte Doherty?S worksheet some extra.
One aspect I discovered is a bit of a higher manner to understand MOI Balance Index (MBI). Here?S a chart showing each of my irons that are MBI matched. It indicates the burden of the clubhead as opposed to the load of the shaft grip. And then the proportion of shaft grip weight to the clubhead weight.
(Click to Enlarge)
There is a few importance to this:
1. We can see that the percentages are kind of at 58% to sixty two%. My target MBI is 38.Zero to 42.0.
2. If we recognize the ratio of shaft grip to move weight, we can then get a better idea of how an awful lot the shaft will have to weigh given the weight of our club head and grip. For instance, permit?S say we have a motive force head that weighs 208 grams. And we have a grip (w/grip tape blanketed) that weighs 50 grams. If we need out shaft grip to weigh 50% of the top weight, we understand that our shaft (trimmed) will want to weigh *more or less* 54 grams:
5 0 g (grip) + 54 g (shaft) / 208 g (head) = 50%
Now, I say it's miles a ROUGH estimate because as you could see some of my irons stray from the fifty eight%-62% shaft grip as opposed to clubhead ratio. This is the motive for Doherty?S spreadsheet as it factors within the balance factor of the club together with the form of head design to calculate the relaxation.
The other component is that we STILL must match the MOI of the golf equipment. So, within the driving force example if we've a 208 gram driver head and a 50 gram grip, we could positioned a fifty four gram shaft in there and get the share at 50%. But, if the MOI comes out to two,700 and we want the MOI at 2,750; we need to add weight to the pinnacle and/or the shaft so one can in shape the MOI.
We?Ll want to maintain the proportion more or less at 50% still as we upload weight so we fit the MOI. In the end, the expertise of the share of weight between the shaft grip versus the clubhead gives us a START as to hard amount of shaft weight. And we will continually add weight to both the pinnacle or the shaft. But, casting off weight from the shaft or the head is a exclusive story.
***
When I at first started out this series, I had determined that I did not need to fool round with my Lob Wedge for the reason that I hit that thoroughly. But, as I started out to MOI and MBI match my irons and I appreciated the method, I determined to modify all of my clubs. In the quit, I figured that if I started out hitting my Lob Wedge worse with MBI matching, I ought to constantly move back to the antique specifications of the membership.
Ironically, the Edel wedges were the clubs that initially got me into MOI Balance Index. When I first started out hitting them, I was not hitting them in addition to I did inside the fitting. The heft of the golf equipment didn?T quite experience the equal. I then measured the static weight of the clubs and noticed they were quite heavy despite being MOI matched. Later, I disassembled the golf equipment and observed that Edel makes use of heads which are pretty heavy. The Gap Wedge got here in at 305.Three grams, the Sand Wedge at 307.4 grams and the Lob Wedge at 309.5 grams. The Sand Wedge and Lob Wedges are lots heavier than any raw OEM wedge head that I?Ve observed. That is not a horrific aspect, however for best becoming there wishes to be the right amount of head weight as opposed to shaft weight and the right MOI.
My answer at the time become to try to match the MOI, but to lower the overall static weight. I did this by means of the use of a far lighter shaft within the Dynamic Gold SL version that is kind of 12 grams lighter than the at the start mounted KBS Tour C-Taper shafts. I started out to hit the clubs a bit better. But in end, I had usually been hitting the Lob Wedge nicely and I simply struggled with the Sand Wedge.
Here is a observe the Sand Wedge specifications BEFORE I despatched it to Joe Kwok:
As we will see, the MOI matched. But, the Balance Index turned into WELL off (50.12 with a goal of 38.0 to forty two.Zero) and the % of the shaft grip weight vs. Head weight changed into additionally nicely off (forty eight.Forty three% vs. 58% to 62%). Essentially, the Balance of the Club is well off for my swing and head became too heavy with relation to the shaft.
Often instances with MBI matching, the answer is simple. Get a heavier shaft. So I attempted to put in my antique KBS C-Taper shaft and observed the subsequent consequences (again, this is BEFORE I sent to wedge to Joe Kwok):
What we see is that the heavier KBS C-Taper shaft helped get the Balance Index down greater toward the goal (38.Zero to forty two.Zero). The hassle turned into that the maximum weight I could add to the shaft with a purpose to decrease the Balance Index become 3 grams. Any greater lead tape delivered to the shaft would reason the MOI to no longer suit.
That?S once I began to decide that the weight of the head had to be lighter. And the best way to attain that turned into thru having a expert club grinder to nicely grind the top and take a number of the burden off. Thankfully, with Doherty?S sheet I ought to determine kind of how plenty weight I have to take off.
Here?S a picture of the pinnacle grind as Joe floor a few off the top. The grind made a little indentation that's what I requested for:
And here are the brand new specs:
Joe become capable of shave off approximately 5 grams off the top. I then brought a touch more lead tape to get the head weight simply right. This allowed me to add a lot of weight to the shaft and the end result became a MOI and MBI that matched. And in flip, I hit the Sand Wedge a great deal better and it?S a complete-time club in my bag.
One question I am positive in an effort to rise up is ?Why didn?T you just get a heavier shaft??
Remember, we've got 2 matters that take precedent over MOI Balance Index matching:
- Matching the MOI of the entire club
- Getting the ideal shaft bend profile in your swing
Without the ones two, Balance Index matching is definitely worthless. I simply genuinely could not discover a extensively heavier shaft that would allow me to suit both the MOI and the Bend Profile.
With that said, Wishon?S new Shaft Bend Profile software became up to date. And we found that his Wishon Stepless Steel (stiff) shafts have honestly an identical bend profile to the KBS C-Taper R shaft version. The Stiff flex version has a much stiffer tip segment.
(CLICK TO ENLARGE)
I understand once I tried the C-Tapers out in my irons with a Stiff flex, I changed into losing approximately 1-club of distance. I also recognise that as a ways because the flex labels cross, Wishon?S shafts tend to play quite a piece stiffer than most OEM shafts. So, if the KBS C-Tapers play stiffer than the Wishon shafts, you?Re absolutely dealing with a completely stiff shaft.
Anyway, at the same time as I?M thrilled with the wedges and the modifications made by means of Joe Kwok. I plan on installing the KBS C-Taper R shafts soon and I think then we've found the remaining fit for these wedges.
3JACK
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