Alright folks, I just put up the first two of these high performance heads in my Ebay store, CR Machine Manufacturing.
http://www.ebay.com/itm/130717462845?item=130717462845&viewitem=&vxp=mtr#ht_918wt_1110
I put in some pretty detailed information about it, but I can elaborate a bit as well;
Every engine is usually different, so results using this head will vary. If you are getting good power from your engine, chances are you are also dealing with detonation problems, like I was when I was using stock heads. Very soon, I will also be selling decked cylinder jugs, so you can bring your piston up higher. This is a really important thing for getting maximum power from your engine because the squish band doesn't benefit the engine unless the piston comes sufficiently close to the bottom of the cylinder head so that that portion of the air/fuel mixture is cooled. Also, you will find that when you remove the head, and look down there when the piston is at bottom dead center, you will likely see the transfer ports are only partially uncovered. To increase transfer port flow, adding base gasket thickness can be part of the answer, which makes decking the jug even more important. I am currently running a jug that has .100" removed from the top face. I will sell that size, and one that has .060" removed, so you can decide how you want your engine set up. I also plan on selling modified pistons which have a little bevel machined on the top edge of the piston on each side, allowing better flow out of the transfer ports. Although this is still in testing phases, I believe a small enlargement of the exhaust port may be necessary. Well, anyway, that's enough talking for now, right?
Thanks a lot everybody!
-Fred
http://www.ebay.com/itm/130717462845?item=130717462845&viewitem=&vxp=mtr#ht_918wt_1110
I put in some pretty detailed information about it, but I can elaborate a bit as well;
Every engine is usually different, so results using this head will vary. If you are getting good power from your engine, chances are you are also dealing with detonation problems, like I was when I was using stock heads. Very soon, I will also be selling decked cylinder jugs, so you can bring your piston up higher. This is a really important thing for getting maximum power from your engine because the squish band doesn't benefit the engine unless the piston comes sufficiently close to the bottom of the cylinder head so that that portion of the air/fuel mixture is cooled. Also, you will find that when you remove the head, and look down there when the piston is at bottom dead center, you will likely see the transfer ports are only partially uncovered. To increase transfer port flow, adding base gasket thickness can be part of the answer, which makes decking the jug even more important. I am currently running a jug that has .100" removed from the top face. I will sell that size, and one that has .060" removed, so you can decide how you want your engine set up. I also plan on selling modified pistons which have a little bevel machined on the top edge of the piston on each side, allowing better flow out of the transfer ports. Although this is still in testing phases, I believe a small enlargement of the exhaust port may be necessary. Well, anyway, that's enough talking for now, right?
Thanks a lot everybody!
-Fred
Nice job
Can you tell me the cc's of the head? With the wider fins, does it run hotter? Also, what is the static compression # compared to stock? What type of alloy is it made from? Have you tried it with and without your manifold? Any differenences?
