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| 6H5...50 hp YAMAHA CYLINDER HEAD....AFTERMARKET VS STOCK http://www.hpbc.ca/viewtopic.php?f=20&t=4281 |
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| Author: | Hounddog [ February 6th, 2020, 5:20 pm ] |
| Post subject: | 6H5...50 hp YAMAHA CYLINDER HEAD....AFTERMARKET VS STOCK |
Anyone run one of these?? http://www.boatracingfacts.com/forums/s ... 70CES+head Similar to the stock centre plug head with smaller volume https://www.ebay.ca/itm/Yamaha-50hp-2-s ... aQ&vxp=mtr Has anyone tried to cut the stock head to achieve 160 lb compression?? |
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| Author: | DoktorC [ February 6th, 2020, 8:25 pm ] |
| Post subject: | Re: 6H5...50 hp YAMAHA CYLINDER HEAD....AFTERMARKET VS STOCK |
Hounddog wrote: Anyone run one of these?? http://www.boatracingfacts.com/forums/s ... 70CES+head Similar to the stock centre plug head with smaller volume https://www.ebay.ca/itm/Yamaha-50hp-2-s ... aQ&vxp=mtr Has anyone tried to cut the stock head to achieve 160 lb compression?? I have a center fire P50 head but it's stock...I'm not sure you could cut it enough without getting into the squish to achieve 160lbs. |
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| Author: | Roflhat [ February 8th, 2020, 5:30 am ] |
| Post subject: | Re: 6H5...50 hp YAMAHA CYLINDER HEAD....AFTERMARKET VS STOCK |
I ran a TSR head on my 70ces, was down on compression compared to my standard head, never got the performance from it. Maybe if you got smaller chambers for it, was at 125psi with TSR, 150psi with CES head |
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