MOI matching irons

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hp12c

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bend the Lie 4 degrees flatter and then measure it, looking forward if you still then say "no" :D

Frans old boy, how is the club tinkering going? last time we chatted u were adding weight to the butt end right? and some where I asked or should of asked about total weight and how that is better or different than sw, moi. I started thinking about total weight and weighed my club what a disparity as the clubs got longer thay also became lighter in tw even though the sw was the same, so I started adding weight to the clubheads of my irons to make them the same in tw, from the lob wedge to the 5 iron, for me I like the way the irons feel and I play now wih the added weight.
 

Brian Manzella

Administrator
There was a point in time that almost all of the Manzella Instructors of the time (myself, Finney, Bartlett, Hamburger, Brent White) had either a FULL set of "Swing Sync" clubs, or at least a few of them.

Bartlett played his best tournament golf with them.

Hamburger still has a set he wishes he could use (contract).

I lost all of mine in the Great Flood of ought-5.

They were SINGLE FREQUENCY, and MOI matched.

I shot 60 (par 68) with a set, missing 4 footers on my last two holes.
 
I had a set of swing sync clubs when I was a youngster aswell. Eric Cook (the founder) had his business in my home town of Ottawa Canada. He retired in 2008 and a member of my winter golf school and a student of mine bought the company. Check out his site at http://swingsyncgolf.ca/ I can ask him any question as I see him 2-3 times a week and is a super nice guy.
 
Well, since I was told not to :) I've gone and slapped the lead weight on a set of irons to match them up for MOI. If you have a roll of tape, it's actually a pretty easy process if you have accurate digital scales. I used the swingweight calculator at tutelman's site. I found that a 4 inch length of tape came pretty close to adding 1 swingweight point, and I built in a 1.3 point SW increase for each half inch shorter in length.

Adjustments weren't actually massive for my project. I have a couple of hybrids, and longest iron is a 5 at D0. The wedges in the set were already D4/D5, so in effect, what I've done is add a small amount of headweight to the wedges, and smoothed out the progression through the set.

Just to make things even neater - my 4H comes in at C9, but if I was playing longer irons at D0, I'd be tempted just to choke down a little as part of the experiment.

I'm not really bothered about whether D0 or the 5 iron is the perfect place to start. It will be interesting to see whether there are benefits of having a set that matches up for MoI. Besides, short irons tend to be my weakness, so there's some intuitive sense in tweaking them with added weight, rather than trying to lose weight in the longer clubs. It also means that the effect on shaft flex is maximised around the 8 and 9 irons, where I think it'll do least damage.

I'll try to repost once I've hit a decent number of balls - but for now, it's an easy change to set up and easy to reverse. So if you're interested, give it a go.
 
There was a point in time that almost all of the Manzella Instructors of the time (myself, Finney, Bartlett, Hamburger, Brent White) had either a FULL set of "Swing Sync" clubs, or at least a few of them.

Bartlett played his best tournament golf with them.

Hamburger still has a set he wishes he could use (contract).



I lost all of mine in the Great Flood of ought-5.

They were SINGLE FREQUENCY, and MOI matched.

I shot 60 (par 68) with a set, missing 4 footers on my last two holes.

Interestingly, I had one of my best players (+2 hcp) in my indoor teaching room yesterday and we were testing 6 iron shafts. We probably tested 10-12 shafts and his ball flight didn't change drastically from X-100, Rifle 6.0, S300, Reg, High Kick, Low Kick, etc. He didn't flush every shot, but when I handed him my "micro-fit" 6-iron, his clubhead speed went up nearly 7 mph. With almost every other shaft there was a dip in clubhead speed (according to FS) of 5-6 mph just before impact. With my 6-iron, the speed increased just short of impact. 7mph with a six iron is a pretty significant jump in distance.

Almost makes you think doubling the price of your clubs every five years may not be such a bad idea.
 
Interestingly, I had one of my best players (+2 hcp) in my indoor teaching room yesterday and we were testing 6 iron shafts. We probably tested 10-12 shafts and his ball flight didn't change drastically from X-100, Rifle 6.0, S300, Reg, High Kick, Low Kick, etc. He didn't flush every shot, but when I handed him my "micro-fit" 6-iron, his clubhead speed went up nearly 7 mph. With almost every other shaft there was a dip in clubhead speed (according to FS) of 5-6 mph just before impact. With my 6-iron, the speed increased just short of impact. 7mph with a six iron is a pretty significant jump in distance.

Same grip size between the two? Did you compare the shaft weight? With either of those two parameters I normally see people improve clubhead speed.
 
There was a point in time that almost all of the Manzella Instructors of the time (myself, Finney, Bartlett, Hamburger, Brent White) had either a FULL set of "Swing Sync" clubs, or at least a few of them.

Bartlett played his best tournament golf with them.

Hamburger still has a set he wishes he could use (contract).

I lost all of mine in the Great Flood of ought-5.

They were SINGLE FREQUENCY, and MOI matched.

I shot 60 (par 68) with a set, missing 4 footers on my last two holes.

Single Frequency matching makes sense to me. Frequency slope or gradient through the set - not so much. I would understand the point of the gradient, or equal steps between adjacent clubs, if you hit your clubs in sequence: driver, then 3 wood, and so on down through the set. But for any real round of golf - the argument for slope matching seems unfounded to me - unless the real effect is to constrain the total variation across the whole set, and indirectly therefore to restrict the variation between any 2 clubs anywhere in the set.
 
I presume you did not experiment with lead tape after choosing the most "comfortable" iron from the set ?



No.

Cheers


Dariuz,

Wrong again...

Ask yourself this: What's the point of picking your BEST club, matching the MOI of your other clubs to that BEST club, then adding lead tape to the longer irons to make them "feel" better? You're changing the MOI... using swingweights to adjust feel... and NOT MOI matching.
 
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Dariusz J.

New member
Dariuz,

Wrong again...

Ask yourself this: What's the point of picking your BEST club, matching the MOI of your other clubs to that BEST club, then adding lead tape to the longer irons to make them "feel" better? You're changing the MOI... using swingweights to adjust feel... and NOT MOI matching.

Nothing's wrong. You mistunderstood what I said -- or I was not precise. I did not say to experiment with other clubs, but with your choosen club out of the set !

Cheers
 
Nothing's wrong. You mistunderstood what I said -- or I was not precise. I did not say to experiment with other clubs, but with your choosen club out of the set !

Cheers

I see what you are saying now... but I don't know why you would do that if you were trying to build an MOI matched set that mirrored your favorite club. I've tried it, I've tried everything. Increasing the swing weight of my favorite club didn't make it favorit-er. It made it suck.

In my experience MOI matched clubs get too light (for ME) in the longer irons... and usually not heavy enough in the wedges either.
 

Dariusz J.

New member
I see what you are saying now... but I don't know why you would do that if you were trying to build an MOI matched set that mirrored your favorite club. I've tried it, I've tried everything. Increasing the swing weight of my favorite club didn't make it favorit-er. It made it suck.

In my experience MOI matched clubs get too light (for ME) in the longer irons... and usually not heavy enough in the wedges either.

As I said, your favourite club in the set is nothing more or nothing less but your favourite club only in your set ! I made mine favourite club (#5 iron) favouriter by experimenting with lead tape. Enough discussion for me.

Cheers
 
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