laudney Posted September 17, 2015 Report Share Posted September 17, 2015 (edited) I'm curious: which non-conforming JDM driver has the highest COR of all? Edited September 17, 2015 by laudney Quote Link to comment Share on other sites More sharing options...
nobmontana Posted September 17, 2015 Report Share Posted September 17, 2015 i believe the Endo Golf Lab LFD driver was at 0.89 bur since the company closed their doors ... they are very hard to find. tried to get one on yahoo jp the other day but winning bid was 88000 yen which was more than when it was new... expect to pay a premium especially for the hi cor version. Quote Link to comment Share on other sites More sharing options...
laudney Posted September 17, 2015 Author Report Share Posted September 17, 2015 Thanks. I don't think the extra COR is worth the price but very impressive from a technological PoV. Quote Link to comment Share on other sites More sharing options...
+TourSpecGolfer Posted September 17, 2015 Report Share Posted September 17, 2015 Maxima ST feels the hottest to me at impact, lots of brands do not want to disclose the COR of their HCR drivers so they say over 0.83. And remember these things can break with 98-100+ mph swing speeds. Quote Link to comment Share on other sites More sharing options...
laudney Posted September 17, 2015 Author Report Share Posted September 17, 2015 Thank you Chris. Quote Link to comment Share on other sites More sharing options...
laudney Posted September 18, 2015 Author Report Share Posted September 18, 2015 I did a bit more research on this. At a swing speed of 100 mph, every extra 0.01 in COR leads to gain of about 4.2 yards in distance. So a LFD driver at 0.89 would give 6 * 4.2 = 25.2 yards of distance gain over the limit. That's quite a lot. Also, big golf companies are usually a bit more conservative and set their COR target at 0.82 so when the usual +/-0.1mm face thickness tolerance kicks in, that pretty much ensures the thinner faces won't result in a COR above 0.83. With the +/-0.1mm tolerance, that means the typical COR range would be between 0.812 and 0.828. So a typical LFD with COR at 0.89 is 7 * 4.2 = 29.4 yards longer than an average mass-production driver with COR at 0.82. Now that's very impressive. Quote Link to comment Share on other sites More sharing options...
73montecarlo Posted September 18, 2015 Report Share Posted September 18, 2015 I don't think anyone with 100+mph swingspeed would need to consider a non-conforming driver. It's more for average to below average swingspeeds of like 85-mph. My own swingspeed is about that, and I played a Romaro HX gold non conforming. I found the distance gains to be minimal. 5 to (maybe) 10 yards at most. Quote Link to comment Share on other sites More sharing options...
laudney Posted September 18, 2015 Author Report Share Posted September 18, 2015 I don't think anyone with 100+mph swingspeed would need to consider a non-conforming driver. It's more for average to below average swingspeeds of like 85-mph. My own swingspeed is about that, and I played a Romaro HX gold non conforming. I found the distance gains to be minimal. 5 to (maybe) 10 yards at most. I agree. It's a bit ironic that the lower the SS the less the distance gain through higher COR (because it's percentage gain in transferred kinetic energy from the club head to the ball). And if SS is already decent, there is increasingly diminishing return for extra distance. Quote Link to comment Share on other sites More sharing options...
Phillip Alexander Posted September 19, 2015 Report Share Posted September 19, 2015 Reality is if you have a swing speed over 100 mph you probably don't need high COR. If you have a lower swing speed and require a few extra yards why not. Quote Link to comment Share on other sites More sharing options...
lousifers Posted September 19, 2015 Report Share Posted September 19, 2015 From my own experience, the LFD driver is worth the price. I'm in the long process of driver shoutout but feel that the LFD will still be my top driver Mark Quote Link to comment Share on other sites More sharing options...
+TourSpecGolfer Posted September 19, 2015 Report Share Posted September 19, 2015 I did a bit more research on this. At a swing speed of 100 mph, every extra 0.01 in COR leads to gain of about 4.2 yards in distance. So a LFD driver at 0.89 would give 6 * 4.2 = 25.2 yards of distance gain over the limit. That's quite a lot. Also, big golf companies are usually a bit more conservative and set their COR target at 0.82 so when the usual +/-0.1mm face thickness tolerance kicks in, that pretty much ensures the thinner faces won't result in a COR above 0.83. With the +/-0.1mm tolerance, that means the typical COR range would be between 0.812 and 0.828. So a typical LFD with COR at 0.89 is 7 * 4.2 = 29.4 yards longer than an average mass-production driver with COR at 0.82. Now that's very impressive. No HCR driver I know of creates 29yds gain or even near that. I would say 10yds at 100mph. I don't know about the physics or math of it but we hit many HCR drivers and the difference is noticeable in some and not others. Quote Link to comment Share on other sites More sharing options...
+TourSpecGolfer Posted September 19, 2015 Report Share Posted September 19, 2015 Reality is if you have a swing speed over 100 mph you probably don't need high COR. If you have a lower swing speed and require a few extra yards why not. Need more distance and want more distance are two different things. If you play only for fun HCR drivers are a blast as nearly everyone enjoys more distance. Quote Link to comment Share on other sites More sharing options...
laudney Posted September 19, 2015 Author Report Share Posted September 19, 2015 No HCR driver I know of creates 29yds gain or even near that. I would say 10yds at 100mph. I don't know about the physics or math of it but we hit many HCR drivers and the difference is noticeable in some and not others. Not surprised. My numbers were based on theoretical perfect condition. Quote Link to comment Share on other sites More sharing options...
laudney Posted September 19, 2015 Author Report Share Posted September 19, 2015 (edited) Reality is if you have a swing speed over 100 mph you probably don't need high COR. If you have a lower swing speed and require a few extra yards why not. Just to provide some interesting context: How many strokes per round are extra 20 yards of driving distance worth? for pros: 0.75 for 80-hcap: 1.3 for 90-hcap: 1.6 for 100-cap: 2.3 for 110-cap: 2.7 source: Every Shot Counts by Mark Broadie Edited September 19, 2015 by laudney Quote Link to comment Share on other sites More sharing options...
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